We have put a new permit through the city recently and now the waste water guys are breathing down my neck to get samples, probably to charge me more. The last sample came back good (7.5 pH, low DO, low suspended solids, high phosphorus, low alkalinity, and high BOD). The BOD was so high it maxed out their meter. The dump in question was from keg washing on one fermenter. Below is some background information.
Keg Washing: We wash under CO2 pressure with Five Stars Acid #6 and sani-clean. The rinses get sent to the "dump tank" and then the chemicals will be sent there as well.
Fermenter: The first rinse of the fermenter with Hot Liquor goes into the "dump tank" and then each sequential one goes down the drain until it contains chemicals or a first rinse after chemicals. The second rinse(s) / cool down goes down the drain. We use Acid #5 from Five star for our acid cycle, followed by liquid circulation cleaner (caustic) from Five star, and then sani-clean from five star.
All these chemicals get sent to the "dump tank" and neutralize themselves out for the most part, I rarely need to make additions to the tank to further neutralize it. From the dump tank we attach a sock to help catch any large particulate before it goes down the drain but this obviously won't catch BOD, which is where my problem is. Does anyone out there know how I could further drop my BOD to appease the waste water guys or am I stuck with high BOD?
Thanks
Keg Washing: We wash under CO2 pressure with Five Stars Acid #6 and sani-clean. The rinses get sent to the "dump tank" and then the chemicals will be sent there as well.
Fermenter: The first rinse of the fermenter with Hot Liquor goes into the "dump tank" and then each sequential one goes down the drain until it contains chemicals or a first rinse after chemicals. The second rinse(s) / cool down goes down the drain. We use Acid #5 from Five star for our acid cycle, followed by liquid circulation cleaner (caustic) from Five star, and then sani-clean from five star.
All these chemicals get sent to the "dump tank" and neutralize themselves out for the most part, I rarely need to make additions to the tank to further neutralize it. From the dump tank we attach a sock to help catch any large particulate before it goes down the drain but this obviously won't catch BOD, which is where my problem is. Does anyone out there know how I could further drop my BOD to appease the waste water guys or am I stuck with high BOD?
Thanks
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