Water and Wastewater.com Help Forums - UASBR operation advice

Ankur YaBB Newbies Offline Posts: 7 New Delhi Gender: Company or Organization: EnviroWay Bioscience Pvt.Ltd	UASBR operation advice Mar 01^st, 2012, 4:39am Dear All, I am doing work on UASBR for treatment of Brewery waste. Pls suggest the ways to maintain Volatile fatty acids and alkalinity in the reactor. also how to operationally cause sludge to granulate if the sludge is non granular in UASBR..
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Peter_McCarthy Full Member Offline Water and Wastewater.com is the best! Posts: 191 Company or Organization: ADI Systems Inc.	Re: UASBR operation advice Reply #1 - Mar 1^st, 2012, 7:41pm Best advice is to get granular sludge from a similar reactor. What is influent flow, COD and influent TSS? What is the size of your UASB? Peter
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Ankur

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Re: UASBR operation advice
Reply #2 - Mar 1^st, 2012, 10:53pm

thanks for replying.influent flow is 350 cubic meter per day, COD varies in the range of 5000- 7000 mg/litre. Inlet TSS is 1020 mg/litre. Size of reactor is 450 cubic meter with HRT of 19 hrs..

Also TSS values in the outlet is around 500 mg/litre which is very high.
Plant is based on UASBR(anaerobic treatment) followed by Extended aeration..

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Re: UASBR operation advice
Reply #3 - Mar 2^nd, 2012, 6:28am

COD loading only 4 to 5 kg/cu m.d so low. I think one of your problems is that your influent TSS is 20 percent of your COD, and its presence is inhibiting the formation and maintennce of granular sludge. You may have to consider solids separation up front of the UASB. In the mean time, make sure all other parameters are good (keep effluent ammonia above 40 mg/l, keep effluent soluble P above 2 mg/l, keep pH near neutral, and don't overload and drive vfa too high. Hard to grow granules starting up a reactor so best to seed.

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dwi handaya God Member Offline Water and Wastewater.com is the best! Posts: 531 Indonesia Gender: Company or Organization: WWT freelancer	Re: UASBR operation advice Reply #4 - Mar 2^nd, 2012, 5:12pm Add Peter comment above : 1. Keep max TSS inlet 200 ppm (solid separation before UASB), the UASB is not designed to treat solid 2. Add chemical flocculation such as FeCl3
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Ankur YaBB Newbies Offline Posts: 7 New Delhi Gender: Company or Organization: EnviroWay Bioscience Pvt.Ltd	Re: UASBR operation advice Reply #5 - Mar 3^rd, 2012, 12:07am thanks for the reasonable suggestions.. I will be working on the same. What to do if VFA conc. increases to a very high note in UASBR. any chemical dosing will help?
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dwi handaya God Member Offline Water and Wastewater.com is the best! Posts: 531 Indonesia Gender: Company or Organization: WWT freelancer	Re: UASBR operation advice Reply #6 - Mar 3^rd, 2012, 12:18am If VFA outlet UASB high --> its mean over load --> reduce the load You should check granular bed, may you should increase your VSS inside the digester. FeCl3 will make the granulation process better
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Ankur YaBB Newbies Offline Posts: 7 New Delhi Gender: Company or Organization: EnviroWay Bioscience Pvt.Ltd	Re: UASBR operation advice Reply #7 - Mar 3^rd, 2012, 12:22am Many thanks
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Ankur YaBB Newbies Offline Posts: 7 New Delhi Gender: Company or Organization: EnviroWay Bioscience Pvt.Ltd	Re: UASBR operation advice Reply #8 - Mar 4^th, 2012, 1:33am Can we treat Yeast also in the UASBR reactor.. Any treatment has to be done to remove polyphenol compounds from yeast which may interfere with the performance of the reactor..
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varodom Junior Member Offline I love Water and Wastewater.com Posts: 51 Company or Organization: PTTChem	Re: UASBR operation advice Reply #9 - Mar 11^th, 2012, 11:56pm Dear Ankur you should be plot graph of VFA for check tendency of your UASB system. when your increase loading VFA will be increase also but not over 2-3 days the VFA should be back to normal. if the VFA will not be back to normal you should be decrease loading and check VSS in your system. Best Regards, Varodom
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