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JemJem123 YaBB Newbies Offline I love Water and Wastewater.com Posts: 3 Kuala Lumpur Gender: Company or Organization: KJ	volatile waste water Apr 12^th, 2012, 10:06am hi, my plant have a new waste water coming in with acetone, IPA and other alcohol chemical with the other waste water channel together into my system. I have an anaerobic system in my waste water system. the problem is now i'm facing high COD in my waste water which is unable to be treated. Please help if you have any solution on this. thanks.
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grrun God Member Offline WaterandWastewa ter.Com is the best! Posts: 3525 Pekin, IL Gender: Company or Organization: Freelance Environmental Engine	Re: volatile waste water Reply #1 - Apr 12^th, 2012, 1:12pm While I'm pretty ignorant of anerobic systems; the contaminants mentioned are definitely treatable in aerobic systems. More information is needed such as influent concentrations, flow rates, discharge concentrations, discharge limits, etc.. grrun
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sobisch God Member Offline Posts: 1777 Gender: Company or Organization: L.U.M. GmbH	Re: volatile waste water Reply #2 - Apr 13^th, 2012, 1:00am Dear JemJem, you will find several articles on anaerobic treatment of this waste by searching for 'acetone anaerobic treatment' at Google. Maybe just the problem that your microbes are not yet acclimatized? Kind regards T. Sobisch
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JemJem123 YaBB Newbies Offline I love Water and Wastewater.com Posts: 3 Kuala Lumpur Gender: Company or Organization: KJ	Re: volatile waste water Reply #3 - Apr 13^th, 2012, 3:16am Hi Grrun, the flow rate is 30m3/hr. Incoming COD is about 5500 ppm while the discharge limit is 200 ppm. Anyhow i have another aerobic system down stream of the disgestor. But the outlet of the digestor shall be achieve 700 ppm. Now the COD is about 9000 ppm at the inlet of the digestor.
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C. Gillen

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Re: volatile waste water
Reply #4 - Apr 13^th, 2012, 10:26am

Hi JemJem123,
Your loading on the AD has increased by almost two fold so it is not surprising that it is causing problems. It will take the anaerobic biomass some time to react to that big change in loading. In the mean time the loading on the aerobic section will increase so you will need to boost the performance of both sections in order to reach your discharge limits. Since the aerobic process is faster it should be possible to boost performance there first. I would consider bioaugmentation in both sections to help deal with the increased loading. More details are necessary for the aerobic section as increased aeration may be required along with nutrient addition.

Best regards,
Cgillen
P.S. If this is of interest let me know and I can arrange for someone local to contact you to sort out the problem.

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The sludge judge

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Re: volatile waste water
Reply #5 - Apr 13^th, 2012, 12:57pm

Check your acid/alkalinity ratio and your pH in the anaerobic pretreatment. You'll probably need to add some alkalinity to the process. The alcohols should be like candy for the digester. What is the maximum designed loading rate for it?

The aerobic step is another thing all together that needs to be figured out. Likely this is overloaded due to the decreased performance of the pre-treatment. You need a microscopic examination by a professional to tell what is going on there. Could be low DO, could be too much septicity/ filaments, lack of nutrients etc. I think it's safe to say you should reduce the wasting rate and let the biomass build up to treat the higher loadings.

Some data on effluent TSS/ soluble COD, orthophoshate, ammonia, and nitrate are also helpful here. Is this a permanent additional wastesteam?

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