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Discussion Starter · #1 ·
I've posted a little paper with some basic guidelines for ya'll wanting to build your own CT brewers. I hope the moderator lets me away with posting the link here this once. If it is removed, I'll understand.

http://www.microbeorganics.com/#So_You_Wanna_Build_A_Compost_Tea_Brewer

Have fun!

Salutations,
Tim

BTW. No problem with the post removed the other day. I fully expected it.
 

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well done Tim, that was excellent!!

If I may be so bold, are there any ideas on a membrane type diffuser? also may I also suggest that as a general rule, 2x the out let size for the tube?? any restriction at all is a real loss. and one more, any one ever try laser holes, in the PVC? we did once it failed bad.

thanks again for your input!!:clapping::clapping:
 

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Discussion Starter · #5 ·
well done Tim, that was excellent!!

If I may be so bold, are there any ideas on a membrane type diffuser? also may I also suggest that as a general rule, 2x the out let size for the tube?? any restriction at all is a real loss. and one more, any one ever try laser holes, in the PVC? we did once it failed bad.

thanks again for your input!!:clapping::clapping:
Hi TG,

I'm a dolt I guess. I don't know what you mean by 'membrane type diffuser'. Do you mean flexible, pliable?

If using diaphragm air pumps, which is all I was addressing, as long as your tubing/pipe is no smaller than the outlet there is no marked restriction of CFM (at least with my flow meter). I have not tested this with regenerative blowers. But thank you for pointing this out. I should make the point that piping/tubing should be at least the size of the pump outlet. 1/2 inch thin walled PVC is actually 5/8 of an inch so I guess I'm covered within the bounds of what I said.

Thank you for your nice comments.
Tim
 

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the ones I am speaking of, are neoprene, like th ones Kiril posted a link for, we have a custom one with a larger surface area than normal almost 9 sq feet, the idea being that as the air pressure increases the holes open more like a tire tube with a hole. the back flow or pressure loss with a regenerative blower is even more of a pit fall, 3" pvc will barely handle a re gen blower. At least the size of the opening is a minimum, its like a water pump, small inlet and out let to a giant pipe to distribute? we have air trouble all the time with the heat and all so we go to some extreme measures to keep 500+ gallons at a time cool.:waving:
 

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Discussion Starter · #8 ·
the ones I am speaking of, are neoprene, like th ones Kiril posted a link for, we have a custom one with a larger surface area than normal almost 9 sq feet, the idea being that as the air pressure increases the holes open more like a tire tube with a hole. the back flow or pressure loss with a regenerative blower is even more of a pit fall, 3" pvc will barely handle a re gen blower. At least the size of the opening is a minimum, its like a water pump, small inlet and out let to a giant pipe to distribute? we have air trouble all the time with the heat and all so we go to some extreme measures to keep 500+ gallons at a time cool.:waving:
Hi Treegal,

Okay, now I get it. I would think these would be a pain to clean. I use a Gast 95 CFM regenerative blower with a 1.5 inch air line. I use multiple Sweetwater 12 inch glass bonded diffusers with no problem but I built my 1200 gallon brewer shallow (28") (above ground swimming pool liner and wooden frame) so there is less back pressure. Also there is greater atmospheric interface for enhanced gas exchange.

Tim
 

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no we just turn off the air for a sec and dump some pool chlorine into a cap on top of the anti siphon loop. the wash gets used to clean the spray tanks and then gets used again to was containers and then the floors, after that it gets sewer-ed. and they really don't get to dirty inside as long as the air stays on. If the power goes out the hole's sort of close over and leak little water, we still have an anti siphon loop.

most of the brewers we have made have a large head of water 56" or greater some have almost 120" of water after the diffuser back pressure. mostly with cone tanks.
 

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the stain less and machine work only cost 34 $ and the neoprene, is a cheap commodity, what do those cost?? 20$ x 8??? if you want to see the buffalo bleed when i squeeze it???
 

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what do those cost??
Depends. The PermaCap5 diffusers (5") are $7 bucks, but I think the FlexAir Threaded Disc Diffusers (9") at $16 is the more flexible option because the membranes can be replaced ($8 bucks) or the entire unit if necessary. Saddle mount @ $20 may be the cheaper all around solution one you figure in fitting costs.

Volume pricing will lower the cost naturally.
 

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Depends. The PermaCap5 diffusers (5") are $7 bucks, but I think the FlexAir Threaded Disc Diffusers (9") at $16 is the more flexible option because the membranes can be replaced ($8 bucks) or the entire unit if necessary. Saddle mount @ $20 may be the cheaper all around solution one you figure in fitting costs.

Volume pricing will lower the cost naturally.
OK thats cool, I will just keep my custom plate for now, I will need a lot of store bought diffusers for 145 cfm, whats the cost diff there??and the sheet neoprene I get with the holes for 3$ I have to cut it.
 

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OK thats cool, I will just keep my custom plate for now, I will need a lot of store bought diffusers for 145 cfm, whats the cost diff there??and the sheet neoprene I get with the holes for 3$ I have to cut it.
9" high capacity disc diffuser has a design rating of 1-8 scfm, with a max of 11 scfm.

Perhaps you won't need to push 145 CFM with these? It's all about DO right, and as long as your hit your desired level your OK.

What I like about them is the integrated checks. :clapping:
 

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lets see, 1500 gallons x .08==== what about the temp??86 deg F, how am I going to jam all 15 of these things in the tank???? and then clean them???? we also have it set up that the flow will help to hold the bubbles under water longer with a smaller bubble. we capitalized on tons or research oxygenating water for fish.
 

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I have the 9" disc diffusers, I tried 4 of them in my 100 gallon brewer. They moved some air and really churned it up, but I had better DO readings using 6 12" sweetwater glass bonded. So far my best O2 exchange happened in lower pressure, some movement of water but not a rocking churn.

I have a question about regen blower and pressure gauge. My new pump has a 56" max duty, and I have a pressure gauge that reads 0-60" H2O. Is the idea to keep the pressure under 56" on the gauge? I know it's a stupid question.
 

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I have the 9" disc diffusers, I tried 4 of them in my 100 gallon brewer. They moved some air and really churned it up, but I had better DO readings using 6 12" sweetwater glass bonded. So far my best O2 exchange happened in lower pressure, some movement of water but not a rocking churn.

I have a question about regen blower and pressure gauge. My new pump has a 56" max duty, and I have a pressure gauge that reads 0-60" H2O. Is the idea to keep the pressure under 56" on the gauge? I know it's a stupid question.
how deep is the tank + the stones = water pressure????
 
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