Monday, April 30, 2007
While surfing the homebrew forums I came across this great idea that is being refined in Australia and is sweeping the homebrewing world. It is called Brew in a Bag or BIAB. It's a very simple technique for mashing in the kettle with a bag made of fine-weave polyester. The water is added to the kettle, then the bag, then the milled grains go into the bag. When mash temperature is correct, the whole thing is covered up for 90 minutes. If temperature adjustments are needed, just a burst of flame to get the temp up again is required.
After mashing, you simply (with some physical effort mind you) lift the bag o'grains out and let them drain into the kettle. No sparge required. I did read an article from a guy in Florida that sparged as well with high efficiency. Once the wort is sitting pretty in the kettle, fire up the gas and boil as normal, adding hops etc. Chill, aerate and pitch the yeast.
There is some issues raised with the fact that the mash is so thin (like 30 plus litres of water) and the pH of the mash. The mash is usually much thicker (less water for the grain) . This has been addressed by the authors of a very well put together document on AussieHomebrewer.com. For pictures and play-by-play see this site.
The biggest benefit of BIAB is the cost. A picnic cooler can set you back a few bucks and if everything is working with your extract brews why bother playing with all-grain?
Today, I am going to see if I can find some polyester fabric so I can give this system a try. I will also try an experiment with a polypropylene woven seed bag. That is about the right size for my smaller stock pot.
Gee, I also need to start malting again, so it's off to the barley shop. Wish me luck!
Friday, April 27, 2007
Not all of us have 8 hours to whip up a 5 gallon all-grain batch, even if it is Saturday. Everything takes longer, mashing, sparging and with big batches; longer to boil, longer to chill, longer to clean up. This is why I like to do a Mid-Week Nano Brew. OK, this is only a starter for you 10 gallon brewers out there, but I enjoy brewing.
I often do a 4 litre (about a US gallon) extract batch in about 2 hours and that includes clean up. It's easy, fast and versatile and gives me choices when I ask my friends "what kind of beer do you want?" It also gives me plenty of opportunity to experiment with recipes, changing hop schedule, different yeast strains or trying an unusual ingredient or fruit like mango. I should also note that little batches are ideal for the homebrewer in the tropics who wants to brew a real lager, but cannot afford the dedicated fridge. A small fermemter can be worked into your existing fridge by moving things around. By the way, my 4 litre nano-fermenter is nothing fancy. It is actually a PET water bottle with a airlock fitted to the lid! I chuck a kitchen towel or t-shirt over it to keep the light out. Very convenient, see the photo below.
Brew -2 hours
Start with 4 litres of bottled water in a soup pot. Bring to a boil and stir in 500g of dry malt extract. It only takes a pinch (like 1/2 teaspoon) of higher alpha bittering hops and boil away. In 45 to 50 minutes add another pinch of some finishing hops and you're almost done.
By this time, if you've kept the lid off the pot, you'll have about 3.5 litres. In the last 15 minutes you can cover or leave the lid off to get about 3.5 litres total wort in your pot. In my nano-chilling regime I use a cold water bath and I add 500ml of santized ice, so 3.5 litres is perfect for my 4 litre nano-fermenter.
I prepare my sanitized ice bags, 500ml each, the day before. I buy "ice bags" at the supermarket and fill them with boiled/cooled water. Into the freezer overnight and they are hard in the morning. As long as you handle them correctly and don't let the bag touch your wort, you should be fine. Stir the ice in with the thermometer and watch the temperature drop .
While I am chilling in the bath, I am readying my starter in the 4 litre mini-fermenter. I rehydrate the yeast directly in the sanitized fermenter and add the cooled wort on top. Simple as pie. Shake the heck out of it to aerate. It's so nice and lightweight.
Today I made a very basic dark ale from 500g of dark DME, some hops (Magnum and Cascades), some Cooper's yeast and of course some drinking water. It doesn't get more basic than this. Basic beer recipes usually work good.
In the time it took me to write up this blog, it looked like this.
I am happy to have any kind of dark beer here in the Philippines.
If I made it,
it tastes even better.
Wednesday, April 25, 2007
Inverting the sugar means converting cane sugar's sucrose into fructose and glucose by using an acid like citric acid. The sugar is boiled for 30 minutes on low heat in a little bit of water. Caramelizing is the oxidization of sugars and creates more interesting and complex flavours. In the Belgian style beers, candi sugar is used to increase alcohol content, impart a variety of colours and flavours and create a lovely dense mousse-like head.
In darker beers I like to use a small amount, say 500g of dark brown sugar (muscovado) or light brown sugar (demarama). I will usually mix these half and half with white sugar and caramelize to create a nice complex sweetness. My recipe for my half and half sugars is like this:
250g white sugar
250g demarama sugar
2 tbs calamansi juice (or 1 tsp citric acid)
water to cover
Put sugar and calamansi (or lemon or lime) juice in a pot. Add water just to cover. Stir and heat on low. Keep boiling it on low. Add a tablespoon of water occasionally as the syrup gets too thick. As the sucrose reacts with the water and acid (citric acid) it becomes fructose and glucose. As the heat is applied the sugars oxidize and burn slightly, called caramelization. Caramelization produces interesting flavors in beer as some of these flavours appear in the finished product. After the sugar is the desired colour or flavour turn up the heat a little to remove any excess water. Pour the thick syrup onto some baking paper and allow it to cool and solidify. Store in plastic bags in the fridge and have it ready for brew day.
If you are using basic white sugar it will take about 20 to 30 minutes of low heat to produce an amber coloured candi sugar. In 45 minutes the syrup will begin to appear orange. It can take over 1 hour to produce dark red candi sugar, so be patient and watch the pot all the time. If you have a thermometer, try to maintain 120ºC (ºF) . An oven style, dial face, meat probe works good. If you have a candy thermometer, even better.
As a rule, 1 pound of sugar in 1 gallon of water is 1.046 (46 gravity points). In metric this is about 120 grams per litre. Adding a kilogram of inverted sugar to a standard batch of beer adds about 15 points. Depending on the Terminal Gravity (TG), this increase in gravity can increase alcohol content by over 2%. The Belgian ales, dubbels and triples are high-strength beers often above 7% and some exceeding 10% alc./vol.
Feel free to experiment with candi sugar or a homemade facsimile in your brewing. Start on the light side though, too much sugar can give your beer an alcohol boost, but it can also make your beer taste like wine.
As part of my Ovaltine experiment, I brewed a bigger 12 litre batch yesterday. I also boiled up some invert sugar to go with it. Here are the details of the Brewing a Beer with Ovaltine Experiment. The recipe became more complex as I fiddled with it. Maybe I should have kept is simple stupid, but I love the complexities.
I started with 1.2kg of Ovaltine in 10 litres of water. This has a specific gravity of about 1.050 in the kettle, if my calculations (guesses) are correct. This gravity is ok for hop utilization. I boiled it hard for 15 minutes and scooped the fat and protein that separated and floated in the foam. I take it that whey powder and milk solids were the grey blobs that were floating up on the side of the pot.
I added 14g of Nugget hop pellets at 15 minutes. I then let it roll hard for another 30 minutes before adding 14g of Cascades as finishing hops. With about five minutes left in the hour-long boil I added 500g of inverted, caramelized brown sugar which I made while watching the boil.
These are the added ingredients that I did not plan on until the last minute. I also added 2 teaspoons of instant coffee and 1 teaspoon of cinnamon. Apparently, cinnamon in an antioxident and hey, I like Ovaltine in my coffee, so it can't be all that bad. I finished the boil and chilled in a bucket of ice water. I added the thick wort the fermenter and added fresh water to 12 litres. I shock it like mad and picthed a package of Munton's Gold ale yeast that I had rehydrated earlier.
For being a fairly high-gravity brew (1.080?), it was roaring in a few hours! The zillions of happy yeasts were chowing on the chocolate wort making some kind of coco-krausen. See photo. It's been a day and a bit and the experiment seems to be going ok. The smell from the fermenter is of malt, chocolate, hops and fruit. I am guessing that the fruity aroma is coming from some kind of reaction with the cocoa? Or perhaps the inverted, caramelized brown sugar? Anyways, it sure smells good.
When the fermentation is complete, I will rack into a secondary with some gelatin in it. I hope to be able to clear the beer, but have not researched much in the way of finings yet. This is a comepletely different kettle of coco compared to real beer brewing.
Monday, April 23, 2007
Most of you will know what Ovaltine is. It's a malted milk drink powder that you mix with water or milk. In the UK Ovaltine is popular, in other parts of the world, Nestle's Milo is popular. After doing some research, reading packages, nutrition web sites, ingredients, etc., I've come up with an experiment to use Ovaltine as a base for beer. If you hadn't guessed it already, malt extract is a big part of these malted milk drink mixes. I will brew up a small batch and experiment with a recipe that I have formulated to make what is essentially 4 litres of some kind of strange chocolate ale.
Here's what I am thinking...
Boil up 500g of Ovaltine in 5 litres of water. I don't know if the yeast will have enough nutrients from Ovaltine alone, so I'll chuck in a teaspoon of dry bakers' yeast in the boil. Add a pinch of bittering hops, boil some more and add some finishing hops, cool, aerate and pitch an ale yeast on it. After a week, I'll rack it onto some gelatin and see how she clears. It will very likely taste like beer as Ovaltine's principal ingredients are sugar, malt extract and glucose.
Here are the ingredients from the label of the Philippines version of Ovaltine:
The ingredients that are bad for beer have little Xs near them, the ingredients that are not bad for beer have little check marks. Sounds pretty neat eh? I'll be take lots of notes and preparing a detailed blog entry to keep everyone aware of what's happening in the laboratory. LOL
Sleep now, it's been a long day.
Sunday, April 22, 2007
Sometimes I re-use yeast from one batch to go another round. This can be accomplished easily by simply brewing up a batch and pouring it into the fermenter on top of the trub from the last batch. This is not always practical as brewing is often a day-long event and we may only have time to rack or bottle on any given day. Washing yeast allows you to preserve it a clean environment for use at a later date.
After you have siphoned the bulk of your beer from the fermenter, you are left with some trub in the bottom. Trub is that lovely sludge of protein, yeast, hops and everything else that has settled out of your beer. It's the yeast that we want and not much of everything else that's gunked to the bottom of your fermenter. We want to isolate the yeast so we can store it. This process is known as Post Fermentation Yeast Washing.
Here's how I do it.
Start by making sure that you have the gear below (or reasonable facsimiles).
Sanitized or sterilized bottle with lid. Plastic ok.
Smaller bottle, preferably glass with metal screw cap.
Fig 1. Gear for Yeast Washing
Before you siphon:
Sanitize a bottle, cap and funnel. I use a plastic bottle of about 1 to 2 litres. I put it into a bleach solution along with the racking cane, hose etc. that I'll be using in the siphoning process. If you have a glass jar, boil it in water for 10 minutes to sanitize it. Leave it in the pot with water. Cover the pot and let it cool to room temperature.
Cover the fermenter when you have finished siphoning. This will reduce the chance of airborne infection; an eyelash or fly landing in the trub.
- Setup a clean workspace. Wipe down the surface with your sanitizing solution.
- Put the sanitized funnel into the sanitized bottle.
- Slosh the trub around and disturb the sediment to make it easy to pour.
- Using alcohol on a cotton ball, wipe the rim of the fermenter where the trub will pass when pouring.
- Carefully pour the sludge into the funnel/bottle. Leave a inch or more of airspace at the top of the bottle.
- Cap the bottle and place upright in the fridge.
The next day, you will see a separation similar to Fig 2.
Fig 2.Gravity Makes Layers
The yeast will be floating on top of the heavier sediments, but still suspended in the beer part. Rotate the bottle and you'll see the yeast swirling around at the bottom of the beer layer. See Fig 3.
Fig 3. Yeast in the Beer
- Boil and cover about 500ml of water.
- Sanitize another bottle. This one can be a little smaller. I use about 300ml size bottle.
(I use a glass bottle with metal cap and boil them with the water.)
- Place a normal drinking glass on your workspace, next to your sanitized bottle.
- Carefully pour off the beer layer into the drinking glass.
- As the beer layer gets down to near the sediment, gently swirl and switch to pouring into the sanitized bottle.
- Add some of the boiled/cooled water to the bottle and cap.
- Record on the cap; date, yeast strain and generation. E.g. April 21, 2007, Saflager, Gen 1.
- Place bottle upright in the fridge. If you can place the bottle way in the back of the fridge where it's very cool.
Fig 4. Ready
- Do not pour out too much of the sediment. We want a small amount of liquid with the yeast, but not too much heavy stuff.
- The boiled water must be below 40ºC (105ºF) or you risk killing the yeast.
- Boiled water contains little oxygen and extends the yeasts' life in the bottle.
- The idea of adding water is to dilute the alcohol exposure to the yeast.
The solution will separate into layers once again. You can wash again if you like, but I wouldn't bother. It's important to note that the more you handle the yeast and expose it to the outside world, the higher the risk of infection. I prefer to leave it as is until my next brew day.
How long will it keep?
If your sanitation practices are good you can store yeast in this manner for a month or more. I have kept washed yeast in the fridge, near freezing, for a month and a half and found nothing wrong with it. Some claim several months, but ultimately you will have to be the judge. Open the bottle and give it a sniff and let your nose decide. If it smells fresh and yeasty, then it's likely good to use. If is smells pungent, rotten, vinegary, sour or shows signs of other lifeforms, molds etc., toss it out.
Note that sometimes lager yeast strains give off a tiny amount of sulfur dioxide and may smell sulfury or like rotten eggs when you first open the bottle. This is acceptable and this should dissipate.
Yeast will slowly turn darker brown with age. People describe old yeast as peanut butter color. If it looks like peanut butter, toss it.
Always remember: It is not worth risking a good batch of beer and good ingredients on some bad yeast. Yeast is not expensive in the big picture.
How many times?
People often ask how many times they can wash and re-use the same yeast. The short answer is a maximum of five or six generations. Like everything else, there is a long answer too. Yeast are living, mutating organisms. Along with the yeast there will always be bacteria and other wild yeasts that co-exist in the trub. As time passes, the risk of making a bad batch of beer increases as other organisms compete with the yeast for resources. The actual number of generations will depend largely on your sanitation practices.
Before you brew
Take your bottle from the fridge and let is come back to room temperature. Give the bottle a gentle swirl to spin the yeast up off the trub and decant the liquid portion into your starter wort.
I hope that you have found this useful.
Friday, April 20, 2007
The past week has been one of a large quest for a bottle, or keg or any real packaging system for my homebrew. I was looking at glass bottles, PET bottles, PartyPig, Cornelius kegs and everything seemed overdone, overpriced or out of reach.
My first choice is a lever or bench bottle capper with a steady supply of crown caps. Unfortunately, these are difficult items to source.
A 20 litre Corny won't fit in my fridge (if I still want to have cold food).
How much for a PartyPig?
The closest place I could find tinted PET beer type bottle were HB shops in Aussie. The price of the bottles plus shipping is silly. I could by the bottles full of beer for cheaper! Oh stink I says.
Remember the movie The Gods Must Be Crazy?
In my morning wanders around the village, I noticed that there are still 1 litre glass Coke & Sprite bottles with screw caps floating around. These heavy glass bottles are circa 1980's in North America before the PET revolution, but they are still widely used here. My fiancee says that there are 750ml glass bottles in circulation, but we don't know if they are screw top.
There is a deposit system on the glass bottles so they are currently returned almost 100%. The deposit is small and I could afford a few of these at that price.
The Sprite bottles are green and the Coke are clear, same as everywhere else. I talked to the vendor and he says they are property of Coca Cola. Nuff said. LOL Something to work on eh?
So there is always an answer if you look hard enough and yes, the Gods must be crazy.
P.S. Venus is in conjunction with the crescent moon. How many drams in a pennyweight?
I have to say I am fortunate to have people send me stuff in the mail. The other day I received another envelope from Canada with some packages of yeast. It was from Mark in Kitchener Ontario Canada. Mark was kind enough to send Cooper's ale yeast, Nottingham, two packs of Munton's Gold ale yeast and some very nice Lalvin K1-V1116 wine yeast. Thanks a million Mark. I'll get something in the mail for you soon.
Savannah Brown or IPA?
The other day I created a recipe on the fly for what I thought was going to be in the style of an American Brown Ale. After running my ingredients through BeerTools' Recipe Calculator, I am guessing that the hop schedule is going to produce more of an IPA. So I will relabel the latest brew to: Savannah IPA. Gee, I can smell the hops from here!
My neighbour wants me to go to Guimaras to talk to some people at a mango plantation about making mango wine. I don't know much about winemaking other than the basics. I've been searching out some recipes (mostly from Australia) for sweet, medium and dry mango wine. Most call for pectinase and yeast nutrient of which I have none. I may be able to source some here if I can find the right contact. Perhaps the plantation people know. I'd be more inclined to use the 3rd rate mangoes for a beer flavouring. We'll have to have a look there.
I am also looking at using PET bottles for beer. I know that there are oxygen migration issues with conventional PET bottles, but after how long is it noticeable? I cannot imagine having any homebrew around for more than six months. LOL There are also these rugged sports drink bottles that are thick and have a sturdy cap. Some are dark tinted, deep blue, black, violet, green etc. and come in handy 500ml to 1.5 litre sizes.
If I intend to keep a few brews more than 3 months, I will put it in glass. While I am in the city I will also look for a bottle capper and some crown seals as there are many decent 500ml amber glass bottles here for free to cheap. Wish me luck finding a capper or caps. Everyone I talk to seems to know what they are, but have no idea where to get them.
Wow, how about an 8 litre keg in the fridge? That's about my laziness.
'Till next time. Cheers!
Wednesday, April 18, 2007
Today was a fun day at the DIY brewery. Man it takes a full day when brewing all-grain, but it's good fun. All my real work was done in the early hours, so I got a jump on brewing by milling 4kg of malt. (actually the wife did the hard part) I boiled up 10 litres of rinse water to use later in the day. I formulated a recipe for a brown ale based on brewer's malt, brown toasted and black malts and some dry malt extract.
By 10:30AM I was off and mashing. I mashed a single step infusion mash with a grist ratio of 3.4 litres of water for each per kilogram of malt. I think this works out to the standard 1.5 quarts per pound that my American friends use. Close anyways. I did a 20 minute protein rest at 50ºC as I know this malt has a little much protein. I started mashing at 11AM and held in at 66ºC for 80 minutes. Sweet!
While mashing, I made a make-shift lauter tun from my old friends the blue water jugs. I used a piece of food-grade 10mm tubing in a coil with slices in it as the manifold. I attached it right to the existing water tap on the jug. It fits perfectly. OK, you have to improvise here eh? See photo of the inside of the jug/lauter tun.
I really don't know if the plastic will make the final beer taste like plastic, but I couldn't detect any problems in the samplings of wort that I took before and during the boil. I do know that it works just like the real thing and after recirculating for a minute the bed was set.
For the sparge I used 10 litres at 75ºC and did a batch sparge. I can't be bothered with trickle and wait. I got almost 25 litres out in total and of course I had to use the two biggest pots I had on to hold it all. I like using two pots as I can make a side brew like I did today. In the smaller pot I added some different ingredients and changed the hop schedule.
The boil was 70 minutes all up with 60 of Nugget 12.8% AA, and 15 minutes of Cascade 7.5% AA. In the side batch I added 1/2 cup of brown sugar and in the main batch I added 500g of dark dry malt extract. This should give a more complex "brown" malty taste (I am hoping).
The big chill came with lots of bottles of ice. In fact I didn't have enough ice made to power the chiller tonight, so it's the royal treatment with air conditioning for these guys until they get into their own chiller tomorrow. By the way, on a hot day, the water here is 32ºC and really is not that great for chilling. At least 10 litres of ice is required to chill 20 litres of boiling wort to pitching temperature.
A package of Danstar Nottingham Ale yeast was rehydrated and tossed into a litre of wort pulled from the mash. I boiled and cooled the mini-wort and shook it like mad. Oh well, no harm done and Savannah Brown Ale is on her way. After 4 hours the yeast has gone into a frenzy, swirling and churning and bubbling like a city alive with people. Magic eh?
I'll keep you posted and take some photos of the action.I learned that the Heat index was 44C today. Man I could go for a beer right now.
Tuesday, April 17, 2007
This is Blue my primary/secondary fermenter. It only holds 20 litres, but I scale recipes for 18 or 19 litres. It has an airlock on the main lid, but can accomodate a blow-off hose from the small cap. I've never had a racked off beer need a blow-off hose, yet (is there really a first time for everything?)
Blue also has a fermometer attached to the side. For convenience, I marked a measure on the side, by adding a litre of water at a time and marking it off like a ruler from 2 to 22 litres.
Inside the jug is fairly easy to clean, but you need to use a soft bottle brush to get up in and 'round the handle. A piece of rag on chop stick will work too.
Blue is an example of Do it Yourself homebrew in the Philippines.
Before I go any further, I want to say a big THANK YOU to Andy from Canada who sent me a package of yeast in the mail. Not just any yeast, but Danstar's Nottingham Ale Yeast. He saw my crazy page called Help Dan Make Good Homebrew in the Philippines. Maybe you can help too. I know that you've got a package of yeast or some spare hops lying around the homebrew cabinet. I have plans for that yeast in a dark ale. I will start on the brew tomorrow and keep you posted.
My last malting is fully dried and ready to use. Although it rained here recently and the humidity has been high, the sun is scorching. So with all the malt ready to go, tomorrow is brew day. I've got the freezer packed with ice and have my yeast starter growler sanitizing.
An update on my little 10 litre batch of all grain that I made a while back is clearing and tasting good. I was concerned that the quality of the barley or the protein content would hinder the clarity or taste.
I am more excited than ever to get a full batch of ale under way. I'll keep you posted.
Sunday, April 15, 2007
After my last experience with crushing my malt with a rolling pin (see this page), hammer and whatever else I could find, I finally splurged a whole P650 ($13.80 US) and bought a blender. A blender you ask! For milling? Yes a friend of mine in Canada suggested that members of his homebrew club have been using blenders for milling malt for years. He suggested "only in short bursts," as the idea is to keep the husks mostly intact and to avoid making flour.
Well I am not a big fan of product reviewing as it usually sounds biased, but I will review this blender for sake of homebrewers who may want a very cheap mill for busting up their malt.
The brand is Home Tech (actually like this: homEtech) , model HTB-1.5L and it has two speeds and pulse button. It's heavy duty glass is about 10mm thick and feels quite robust. It states a "50 ounce capacity", I guess that is fluid ounces.
This blender has what the manufacturer calls a "grinder attachment" (see photo) and it is apparently suitable for "coffee beans". The instructions explain the usage of the "dry & wetmill attachment." Note that the blades on the mill attachment are stainless steel like the blender attachment, but not sharped.
Pretty good grind.
As a test and to get the technique right, I used the mill attachment to chew up about 1kg of malt. By pulsing the unit for short bursts was able to get a decent grind, not too fine and not too coarse. With a little practice and observation I was off and running.
All in all, I like the milling attachment. OK, it's kind of small and only holds about 100g at time, but it saves much labor and rolling pin action. If you are considering a cheap mill for your malt, I will suggest this model. The price is certainly right for me. Oh, and it comes with a 1 year warranty, so if you fry the motor making a barley wine, you're covered.
Now go have a beer and save the rolling pin for making pastry.
Saturday, April 14, 2007
Oh well, at things do get here and I have slightly more faith in the postal system than before. The post office is closed today, but Monday I'll go down there and pick up my parcel.
Today, I also made a common temperature table for conversion of metric to imperial. I read of mash, fermentation and sterilization temperatures in ºF and my thermometer is ºC only. I thought I could print it out and stick it on the wall by the stove. Anyways, here it is:
*A note about the last temperature on the table. There is a newly discovered organism that can survive standard 121 degree autoclaving. It lives in volcanic vents under the sea, so there isn't much of a chance that the average brewer will encounter strain 121.
The homemade malt is drying in the sun now and another full day will do it. I may even be kilning some this afternoon in the solar oven. The sun is hot today. A perfect day to have a water outage hey?
Friday, April 13, 2007
I have a thing about not spending too much money on stuff that I can improvise from junk. Maybe I got that from my Dad, I don't know. I should have hung out with McGyver in the 1980's.
Before I continue, let me explain something about the Philippines and most other places in the tropics... It's hot. It's hot all the time. Even at night in the "winter" it's hot. Our little yeast buddies don't like it too hot, they go crazy and make our beer taste funny. So I give them a few degrees of a chill when they are working hard. It's the least I could do for them.
I have this simple and effective fermenter chilling box that I made from some junk. I call it the CFCE (Cheapest Fermenter Chiller Ever). I think I spent $1 for all the parts including tape...now that's cheap. No, that's McGyver!
The box idea comes from the Son of a Fermenter design that's quite poplular with homebrewers. I did some research and found that junky white polystyrene beadboard that comes in appliance packages and just about everything else these days, is actually a very good insulator at R4 per inch. See my previous post on the subject here.
A Tale of Two Boxes
The basic parts are two carboard boxes, some beadboard and a few pieces of extra cardboard. Throw in a roll of packing tape to hold all the parts together and you are in business. Here's a drawing.
Firstly, there is a Box A, which is big enough to hold your fermenter, plus some extra room on top to place a few 2 litre bottles lying down. Ideally this Box A is not much bigger than your fermenter.
Then there is the bigger Box B. Box B should be about 100mm (4 inches) bigger that Box A on all sized. If Box B is too much bigger, then you will have to find lots of beadboard to fill the space. Mind you, your R value will be improved with an increase in space between the boxes.
How I did it
I'll explain how I did it and let you figure something out with your scraps.
I first reinforced the big box's (Box B) bottom and tape down about three or four layers of extra cardboard and tape the seams and seal it up good. Solid! Then I dump a bunch of broken beadboard pieces into the bottom of Box B, about 100mm thick.
Now I place Box A inside of Box B. See the diagram above; gee this is easy! Now it's just a matter of filling around Box A and getting beadboard all the way down to the bottom, along each side. It's a lot of crumpling and breaking the beadboard. Sometimes the pieces fit good already, so look for rounded corner pieces that match your filling requirements.
Here's what the insides look like before I taped the deck down.
There is one more piece that completes the base unit. It is a top deck to set the lid on. The deck is made of a single piece of cardboard with a rectangle (or square) hole in the middle and four tabs that are folded downwards where they meet Box B.
You have to be careful to measure it correctly to fit your two boxes. Unfortunately, I cannot tell you the exact dimensions of your deck as I don't know your box sizes. Here's a diagram to help you follow what the top deck is.
I used packing tape to seal the top deck on to the base unit. Tape may not be required if you are measuring twice and cutting once.
The lid is simply anything that fits into Box B so as to cover Box A. You can make a lid from stacked cardboard layers, polystyrene pieces, a single piece of cardboard with a blanket on top, whatever you have. As long as you can remove the lid to change your ice bottles and check your brew. The top lid is not that important as the cool air will sink to the bottom of the chiller. Just give your lid some insulating properties. I used 8 cardboard pieces stacked up with a rope handle from the 4th piece to the outside. Be creative.
Cooling Power Test
Before you brew, you should do a dry run as you probably have enough to worry about on brew day. I suggest that you freeze a bunch of water in plastic bottles the night before the dry run test. Freeze about 5 litres of water in 1 to 2 litre plastic bottles.
The next day, fill your fermenter with 20ºC water and get your thermometer(s) out. Put your fermenter in the chiller and place some ice bottles in plastic trays on top of your fermenter. (The trays collect the dripping condensed water.) The ice being on top is good to allow the cool air to sink downwards around the fermenter and collect at the base. If you remember brewing 101, lager yeasts will be down there at the bottom of the fermenter and enjoying that cooler climate.
If you have a fermometer watch the temperature of the water in the fermenter. If you don't have a fermometer, place a thermometer beside the fermenter.
By adding ice you should be able to cool the water to lager fermenting temperatures (10ºC). How much ice depends largely on the room temperature where the chiller is located. Compare the outside temperature to the inside temperature. This is called the temperature differential. With practice, you will learn the efficiency of your chiller. Oh, don't put the chiller in the sun or other super hot place, like fireplaces, furnaces, ovens or whatever. (My lawyer made me say that!)
After your dry run, you can prepare as much ice as you need to make through the fermentation at whatever temperature you need. I find 2 litres a day for ale yeasts at 30ºC ambient is good. Make more for lager yeasts and higher ambient temperatures.
I wish you all the best and happy "cool" brewing whether you are in the Philippines or anywhere else in the world.
Thursday, April 12, 2007
The malting is going well and the barley is fully modified and in the sun drying as I write. The system is getting more efficient as I learn. See the photo at left. That is fully modified.
I've been thinking lately and because I am always in the mood to experiment, I have come up with two possible experiments.
I had a Cali Shandy the other day and very much enjoyed it. I would like to try to brew something along the lines of a pineapple accented beer. If anyone has any recipes please let me know. My guess would be to add some fresh pineapple to the wort, but I am not sure how the citric acid would effect the wort pH. Probably it wouldn't lower it enough to be of a concern. Yeast like a lower pH environment of between 5.2 and 5.6.
We eat a lot of ampalaya and grow it in the garden here. I tasted some ampalaya leaf the other day and noticed a similarity with fresh hops; super bitter that is. I want to add some ampalaya leaves to the boil on my next batch. Maybe I'll split the boil into two and try some with ampalaya and some without.
We'll see how my 10 litre batch goes. It's clearing now. We may be able to bottle soon.
Tuesday, April 10, 2007
While on the daunting city jaunts, I quite often managed to acquire some small but useful things for my home brewery; today was good for useful things. I have located some aquarium silicone for making water-tight connections in the brew gear. It's clear and requires 7 days curing and a rinse before I can use it in brewing. It's called Pioneer Mighty Seal and comes in the small 50g tubes.
I also found some tiny little pump spray bottles at Watson's for isopropyl alcohol. When I am working with yeast cultures I can just spray and wipe with a cotton ball.
I also picked up the closest thing I could find to a turkey baster... it's called a "flavor injector" which is basically a large veterenarian type hypodermic needle that I can suck a wort sample with. The nice thing is that is has a detatchable stainless steel tip and it's easy to clean. I could also attach a length of small-diameter tubing where the needle part is.
Another thing-a-ma-jiggy is a make-shift airlock. From a sprayer bottle kit I use the tubing with some food grade silicone and some cable ties to make an airlock for my growler. I have another airlock on order from the US, but who knows when that will get here. The postal system here is about as reliable as a 10 cent watch.
There is another batch of malt in the works. This time 5kg of barley. It's already germinating very well and will be fully modified in about two days. I'll take some pictures.
Sunday, April 8, 2007
Brew Day at Last!
I thought I would keep you guys posted on my malting at home experiment.
Today, I did a 10 litre mini-batch with the generic malt I made. All manually crushed with a rolling pin (lots of work) like I mentioned before. For 3 kilos it took me over an hour!
I mashed with a 3.4:1 water to grain with 3kg of malt. I did a long 60 minute protein rest at 45ºC to 50ºC because I don't know the protein content of the malt. If it is heavy in protein I hope this will help. If it's lighter on protein the beer will likely be headless. Going for sweet and fermentable, I went by taste on the beta amylase rest. It rested long and low as I held in for 90 minutes at 60ºC. I want to see how sweet this stuff can get.
I suspect that the malt could have been modified more or I did something to disable some of the enzymes during kilning. More things to try next time.
I boiled the sweet smelling wort for an 75 minutes. 15 minutes for scunge skimming and 60 minutes with hops in. I got a good hot break. I hopped it with 1/2 oz of Magnum pellets and 1/2 oz of Cascades at 45 minutes. When I chilled in the ice bath I could see more globs forming. Aerated and pitched with 1 package of re-hydrated Cooper's ale yeast. Total yield was just over 10 litres.
I have no idea what kind of beer this is going to be. I hoped to make something quite bitter and dry. Hopefully the yeast has the punch to take the FG down low. Staying away from the alpha amylase rest was the idea there. The color is very light and I suspect it will be quite a pale ale, probably more like a lager in looks.
All good fun. Considering that the unknown in my recipe is the malt, and making malt can be just as much an art as making beer. I'll let you know how it turns out. I expect to hear the airlock to be calling me soon.
This is truly 'seat of the pants' homebrewing in the Philippines.
Saturday, April 7, 2007
Wow, we got back from the beautiful island of Boracay after a few days R&R and I found that James from Basic Brewing has mentioned me in his podcast! Hey thanks James. Here are some of the links to the malting topic pages.
- Malting Barley at Home, Finally
- Modification of Barley
- More on Modification
- Houston, We have Malt
- Making Crystal Malt at Home
- Roasters and Rhizomes
Sometime this week I am going to brew a small batch from the malt that I have made and check the quality. I am a little concerned about the protein levels. I read somewhere on the net that feed barley is higher in protein that malting barley. They also described the feed kernels as plump and round. The barley that I have malted is certainly not plump.
Boracay (pronounced bore-ra--k-eye) is a very small island just off the northern tip of Panay, here in the Philippines. We are fortunate to live fairly close and can take a bus and short ferry trip to get there. If there is one place in the Philippines where tourists flock to it's Boracay. The beaches on Boracay are beautiful, white sand, palm trees; basically the stuff of postcards and the sunsets are world famous. There are many resorts, shops, restaurants and night clubs. I guess if you have ever been to Hawaii you know the feeling.
The big attractions are the beaches and the scuba diving. The reefs and colorful sealife around Boracay are well known in the diving scene. If you are brave you can try parasailing; the less brave can wander the markets and malls, but I am happy to have a beer on the beach while sitting under a palm tree.
Beer in Boracay is San Miguel brands all the way, but I did see some Heineken, Colt 45, Carlsberg and Lone Star in a grocery store there. I can forgive the locals for overcharging for beer as they are making a living off the tourism business. On White Beach a bottle of San Mig Light can fetch 60 pesos. The bottlecap has clearly stamped on it 18 pesos. To give you an idea the supermarket price is $0.38 US and the beach price is $1.27 US. Of course there is ususally some kind of entertainment or happy hour specials, 2 for 1 etc. and most tourists don't care as long as it's cold.
All in all, Boracay is wonderful place to visit. It's safe, has all the services, lots of things to do and tons of entertainment. We're going to go back again, for sure, but now we need a few days to recover from our vacation!
Tuesday, April 3, 2007
Last time we were talking about diastatic power of a malt. Base Malts are malts that have enough diastatic power to convert their own starches to sugars. Common base malts are 2 Row, 6 Row and Pale Ale. These malts can be used to convert other starches in the mash. The table below may help you get your base malts sorted.
In all fairness malted rice and sorghum could be added to the list. Both have their share of problems when it comes to mashing and the resulting taste of the beer brewed. Maybe my friend Greg will find the magic bullet and make a really great tasting beer from rice.
Base malts are really the work-horse malts that carry the bulk of the enzymes to convert starches to sugars. With a large proportion of base malt, we can then add specialty malts and adjuncts to the mash to create different effects.
In the Philippines it's expensive to ship lots of base malt from Australia or the US. The cost of shipping often is greater than the malt. I'd recommend malting your own base malt here and ordering in smaller amounts of specialty malts to create the flavors and textures you want. Adjuncts such as oats, rice and corn are readily available in supermarkets, so we don't have to import them.
Next I want to look at adjuncts and their effects in the mash and the finished beer.
Monday, April 2, 2007
One thing of most interest is the diastatic power of the malt. A well modified base malt will have at least 20% more muscle so that things that cannot self convert their own starch can be included in the mash. The base malt has the extra amylase to convert other things such as corn, rice, unmalted barley and oatmeal. The amylase enzymes float around in the mash at 60 to 70ºC chomping all that starch into sugars.
Extract brewers need not worry as all the sugars are already available. So with extract recipe no enzymes are needed. Enzymes are denatured (killed) in the evaporation and or drying processes.
Anyways, back to the mill. The idea of a barley mill is to crush the grain and not shred its husk. We are going to need the husk intact to act as a filter in the lauter tun (aka cooler). We also don't want the seed to be pulverized into powder as the flour can cause gummy blobs that block the flow from the lauter tun and cause 'stuck mashes'. So the job the mill has to do is like a rolling pin with enough force to crumble the insides of the seed and yet leave the husk in pretty good shape.
Git Yer Rollin' Pin
Seeing as though I have no real barley mill, but I do have a rolling pin I thought I'd give that a go. By placing a few cups of malt in a heavy duty plastic bag I began rolling and crushing. I did this in the kitchen on the big cutting board.
The result was pretty good and looked consistent with what I was hoping for in a crush. Now a few cups is a few cups, but I have lots of cups to crush.
It's a lot of work, it's hot and I am getting thirsty. I guess I am going to have to make some beer soon.