Technical discussion: How are alcohol waste streams treated? Can it be treated with aerobic aeration?
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This post was last edited by hesonchang214 on 2011-10-24 17:01. How are alcohol waste liquids disposed of? Can it be treated with aerobic aeration?
This post was last edited by hesonchang214 on 2011-10-24 17:01. Is the concentration high? Alcohol is a readily biodegradable organic pollutant, but high concentrations can affect microbial activity. It can be treated directly using the aerobic (aeration) process, but care must be taken to add nitrogen and phosphorus sources!
This post was last edited and replied to by hesonchang214 on 2011-10-24 at 17:02. Reply 2# solomono: Alcohol waste liquid has a high COD level, but it also contains large amounts of substances such as potassium, nitrogen, and phosphorus!
What are the concentrations of potassium, nitrogen, and phosphorus? What’s the COD? Is there anything else? I need to make it clear
Reply to 4# zzjgo: I don’t know either; I’m here to learn as well! I only know that the COD level is very high; after treatment, it can be used as organic fertilizer
This post was last edited by yzhang2010 on 2011-10-25 at 11:36. A inclined tube sedimentation tank can be used for primary sedimentation, a regulating tank for the formation of a biofilm on the filter media, followed by two-stage biological aerobic aeration treatment
Reply to 6# gydc0919: Could you be more specific? Is the SBR process feasible?
Reply to 7# wyq7826275: The quality of the raw water and the standards for the treated water are not clear; it’s too early to discuss the processing methods. Ethanol is readily biodegradable, but are there any other COD components? The concentrations of nitrogen and phosphorus determine whether denitrification and phosphorus removal are necessary, as well as whether pretreatment or advanced treatment is required. The water quality of wastewater at the inlet and outlet is very important; it must be clarified first.
Reply to 7# wyq7826275: The method that I’ve seen being used most frequently is UASB; however, there are also cases where UASB+SBR is employed after solid-liquid separation
Reply to 9# gydc0919 Thanks!
Alcoholic waste liquid not only has a high COD but also a high SS and a high color intensity; therefore, direct discharge into aerobic treatment facilities does not meet the treatment requirements. If wood-based materials are used for alcohol production, the suspended solids have little use, but they can be burned, as they possess a high calorific value ； If it is corn or sweet potatoes or the like, their suspended solids can be recovered for use as feed. Alcoholic wastewater contains a high level of suspended solids; generally, centrifuges are used for centrifugal separation, followed by anaerobic treatment and then aerobic treatment. Sometimes, additional equipment such as oxidation ponds or sand filters is required to achieve better treatment results.