i have had this document for a while...i just ran across it...a couple of methods are diy...i am going to try to attach the document

p.s...i found out my document is 26 kb and i can only upload 19.5 kb word document so i coppied the fermenting method to post here

Attached Files

co2 enrichment.txt (8.9 KB, 139 views)

Looks good, but is there any other way of posting it properly?

hi jon
i dont really know if there is a better way to post it...i am computer illiterate...lol...the full document has 5 different methods...it took me forever to figure out how to post the little i did...any ideas?...the full document is almost 26kb and this site limits word document to 19.5.

Copy and paste?

__________________
Take a look at my Crimea Blue:
http://www.rollitup.org/grow-journal...blue-soil.html

3. DRY ICE METROD OF CO2 ENRICHMENT:
This method works well for small areas, especially if some cooling effect is desired. Dry ice, solid carbon dioxide, is very cold\'f3about 109 degrees F below zero\'f3so we suggest you handle it with gloves. Dry ice is available through freezer and meat packing outlets and is relatively inexpensive. In our std. 8' X 8' X 8' room, you would need about 0.8 lbs. of dry ice per day to raise the atmospheric CO2 content to 1300 parts per million. If the growing area is quite warm, 0.8 lbs. can melt much faster than 18 hours. Two methods can be used to regulate this. One is to cut just small pieces, about .1 lb., and add a new piece every two hours to the growing area. The second method is to put the required amount in an insulated styrofoam box with a few small holes cut in it. This will slow the rate of melting considerably but must be "tuned in" to get it just right so 0.8 lbs. melts in the 18 hours of light "on" time. Extra dry ice must be kept in a freezer to prevent loss due to evaporation.

Since CO2 is heavier than air, one good method of distributing it to the plants is to attach the container or dry ice to the light reflectors which are normally placed over the plants. The CO2 will then flow down through or over the lights and evenly bathe the plants. If a circulation fan is used, the dry ice or its container should be placed directly in front or behind it for even distribution. Common to all CO2 enrichment methods, try to seal up the room or greenhouse as best you can, especially around the bottoms of doors and walls.

The dry-ice method will cost around 60 cents per day for our standard sized, 512 cu. ft. grow room. A possible benefit of using dry ice is the cooling effect it produces.

4. FERMENTATION METHOD OF CO2 ENRICHMENT:
Sugar is converted into ethyl alcohol and CO2 when it ferments due to the action of yeast. In this method, the following ingredients and equipment are needed:
1. Suitably sized container, plastic or glass
2. Sugar, common or invert
3. Yeast, brewers or bourgelais wine yeast
4. Yeast nutrient
5. Sealant, cellophane, tape or lid
6. 1/4 plastic tubing
7. 1/4 shutoff valve
8. Balloon
9. Starter jar or bottle

A pound of sugar will ferment into approximately half a pound of ethyl alcohol (C2H5OH) and half a pound of CO2. One pound of CO2 makes 8.7 cubic feet of CO2 gas at normal atmospheric conditions. In our standard 8 X 8' X 8' grow room, you will need to generate 512 cu. ft. X .0013 (1300 PPM CO2) = 0.66 cubic feet of CO2 every four hours. It takes time for the yeast to ferment sugar, so the size of container you should use in determined by dividing the cubic feet of growing area (512 Cu. ft.) by 32 = 16 gallons.

A convenient container to use here would be a plastic kitchen garbage can. These are inexpensive and easily obtainable. To determine how much sugar we need for six weeks of operation or until fermentation ceases, the following calculations are necessary: From the above paragraph, we need 0.66 cu. ft. of CO2 every four hours. If one pound of CO2 makes 8.7 cu. ft. of CO2, we will need 0.08 lbs. of sugar, but because every one pound of sugar only makes 1/2 lb. of CO2, we must double the amount of sugar needed, i.e. 0.08 X 2 = 0.16 lbs. of sugar every four hours. Since there are six four-hour periods in a 24 hour day, the amount of sugar we need is 0.16 x 6 or 0.96 lbs. of sugar per day.

If we round this off to one pound of sugar per day, we will need 42 lbs. of sugar in six weeks. We must consider that only 80 to 90% of the sugar will be completely converted in this length of time, therefore, we should actually use about 48 lbs. of sugar in six weeks.

The sugar solution to start with is 2 1/2 to 3 lbs. per gallon. You can use hot water to start with, as sugar dissolves faster in it than in cold water. You must let it cool to 80-90 degrees F before adding yeast to it or the yeast will be killed. Start with the fermenting container only half-full as you will be adding an extra gallon per week for 6 weeks. Begin with eight gallons per week and 24 lbs. of sugar.

To start the solution fermenting, you will want to make a "starter batch" of sugar water, yeast and yeast nutrient. To do this, use a coke or beer bottle (approx. one pint), dissolve 1/4 lb. of sugar in 10 oz. of warm water (approx. 3/4 full), add a pinch of yeast and two pinches of yeast nutrient to this sugar mixture. Place a balloon on the bottle and set in warm location, 80 to 90 degrees F, for one to two days or until the balloon expands and small bubbles are visible in the solution.

After the starter solution has begun fermenting vigorously, it is added to the main fermentation tank at the same temperature already mentioned. After a day or so, to see that the system is working properly and that CO2 is being generated, close the valve to the supply tube and, if the unit is sealed properly, the balloon should expand in a short period of time. To regulate the amount of CO2 being delivered to the plants, open the valve until the balloon is only half the size of full expansion.

The CO2 supply tube with in-line valve should have a 2" loop in it half full of water to serve as an air-lock. This loop can be held in place with tape on the side of the fermentation tank. The open end of this tube can either be positioned in front of a circulating fan or run through "T" fittings to make additional tubes, the ends of which can be positioned above your plants. Remember, CO2 is heavier than air and it will flow downwards.

Once per week, undo a corner of the Saran Wrap and add an extra gallon of sugar solution and yeast nutrient, then reseal the top with tape. Use three lbs. of sugar and one teaspoon of nutrient per gallon.

After the last gallon is added, after six weeks of operation, let fermentation continue until the balloon goes down and no more bubbles are visible in the "U" tube. When this point has been reached, taste the solution. If is it sweet, fermentation is not complete and a new starter batch should be made and added to the tank. More yeast nutrient should also be used. If the solution is dry (not sweet) like wine, fermentation has stopped and the alcohol content has killed the yeast. At this point, it's time to clean your tank and start a new batch.

The fermentation process is quite good for generating CO2 and relatively inexpensive. Regular or invert (corn) sugar is inexpensive and available. You may have to purchase invert sugar at a wine supply store. This method of generating CO2 will cost approximately 50 to 60 cents per day.

To save money on extra yeast, you can either take out approximately a gallon of fermenting liquid and save for the next batch, or start a second system identical to the first and alternate them\'f3clean and replenish one, then three weeks later, clean and replenish the second.