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Old 04-02-2013, 11:42 AM   #21
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What about leach beds?

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Old 04-02-2013, 02:26 PM   #22
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The only thing I can think of (and I'm trying to think practically about negative impact because no one else is posting anything) is that the trub may become an issue. If it builds up and offsets the amount the solids tank can hold then that will overflow to the liquid side of the tank and eventually push the solids out to the runs and clog them up. I pump my tank regularly so this shouldn't be an issue... anyways, that's all I got as far as negatives go...

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Old 04-02-2013, 02:39 PM   #23
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Guys, you are talking about dumping, what....1-3 gallons of brewing waste at any one time, when an average of 69 gallons of waster water gets dumped per person per day (EPA estimate)?.... That's 276 gallons for a family of four.

I can't imagine that it would make a s*it's bit of difference, one way or another... (expletive used merely based on subject at hand!)

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Old 04-02-2013, 02:43 PM   #24
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I'm an environmental engineer and yeast is not on any of my lists of "what not to dump down your drain" that we give to clients. Anaerobic bacteria are in the trillions in your septic tank. It is unlikely that yeast will do anything but fall to the bottom in an anoxic environment.

Why dump trub down the drains though? It's just going to add to the solids in your septic tank. If you have a yard just pitch it out in the lawn...won't hurt anything. I never dump food trash or liquids down the drain that could be dumped outside. If it's biodegradable I dump it in my woods behind the house.

If you dump anything and everything down your drains because you have city sewer...well you are the kind of people that are the scourge of the wastewater treatment plants and the reason your sewer bills keep going up!

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Old 04-02-2013, 02:50 PM   #25
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Quote:
Originally Posted by Jayhem View Post
I'm an environmental engineer and yeast is not on any of my lists of "what not to dump down your drain" that we give to clients. Anaerobic bacteria are in the trillions in your septic tank. It is unlikely that yeast will do anything but fall to the bottom in an anoxic environment.

Why dump trub down the drains though? It's just going to add to the solids in your septic tank. If you have a yard just pitch it out in the lawn...won't hurt anything. I never dump food trash or liquids down the drain that could be dumped outside. If it's biodegradable I dump it in my woods behind the house.

If you dump anything and everything down your drains because you have city sewer...well you are the kind of people that are the scourge of the wastewater treatment plants and the reason your sewer bills keep going up!
What's the diff between dumping it out your lawn, versus sending it out to your lawn via the septic?
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Old 04-02-2013, 03:01 PM   #26
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I think the difference is the fear that the yeast will basically ferment in your septic tank causing buildups and blockages and keeping your septic tank from functioning. Maybe it could produce a "yeast cake" of buildup in the tank and contribute to failure. From what I've read, most small breweries that use a septic system (not very many) actually boil, nuke, or pressure-cook yeast before dumping it down the drain or even mixing it with their grains. I assume large quantities of live yeast aren't super-good for cattle to consume as far as the latter part of that.

My shed brewhouse has a 55 gallon drum for a septic tank- it is ONLY used for brewing and despite my efforts to keep solids-down-the-drain to a minimum I'm sure that plenty of yeast and trub have ended up in there. It has worked just dandy for years without a pumping.

I'm interested if anyone has a horror story they can directly correlate to yeast-dumping; otherwise it appears so far that it is a beneficial practice rather than the assumed-by-some horrible negative. There are quite a few other HBT threads about this subject, and they all seem pretty positive.

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Old 04-02-2013, 03:08 PM   #27
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I hope it ok to do been doing it for years

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Old 04-02-2013, 03:54 PM   #28
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I think the majority of people on there don't have septic tanks, or they don't know how they work. Yeast solids are going to have zero effect on a septic compared to the vast quantities of other solids that end up in them. By solids I mean "sh*t"... Septic tanks are designed to handle solids.

For some reason, it is also assumed that yeast would even survive and propagate in a septic system. Not sure why people jump to this conclusion...I will admit I don't know for sure, but from my quick googling it seems that most people equate yeast with bacteria and thus they must grow in a septic. I hope us homebrewers can see what's wrong with this argument...

Then it comes back to the sheer amount that would end up in the septic itself. Again 1-3 gallons of yeast/trub compared to the 69 gallons per day each person of the household ends up dumping into it...

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Old 04-02-2013, 05:17 PM   #29
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10+ years and I have never had the septic oumped ( are you supposed to). Everything except the spent grain goes down the drain.

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Old 04-02-2013, 05:22 PM   #30
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10+ years and I have never had the septic oumped ( are you supposed to). Everything except the spent grain goes down the drain.
It depends who you talk to. I do it... I know others who don't/
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