As Dave has said, the first ...
Published by Jeremy Biddle, Engineering Director at Bluewater Bio
As Dave has said, the first thing to check is whether the waste can be minimised at source, or the effluent can be beneficially reused.
If you have to treat it, 60-70% COD removal in the UASB stage is reasonably good. You can test to see whether the waste is amenable to further anaerobic digestion at lab scale and, if so, you might want to check the efficiency of mixing in the UASB or consider a separate post-digestion anaerobic stage. I guess you're already recovering the biogas and using it? The sludge yield is an inevitable byproduct - it is material that was not digested in the UASB either because of poor mixing/ inadequate retention time or it is simply not degradable under anaerobic conditions. Pre-hydrolysis or ultrasonication techniques might improve digestion slightly, but at a price.
The UASB effluent can then pass to an aerobic process such as activated sludge to reduce BOD and other parameters to as low as needed. To meet zero liquid discharge requirements for recycling or reusing the water you may need to add additional filtration stages.
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After Biologicals Nano, Reverse Osmosis, SWRO and MEE is already installed. Problem is Nano Can't handle such high load of BOD/COD
Published by Shashikant Thakur, Director at Dew Envirotech Pvt Ltd
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OK, understood. So now we need to establish what form the carbon is in. First is it particulate and can it be removed by prefiltration before the nano? If so we may be able to help using our FilterClear system.
If it is soluble then we need to check how biodegradable is the residual carbon? You could check the BOD:COD ratio and carry out a respirometry test to check. If it is biodegradable at a reasonable rate then it suggests that the biological treatment isn't working efficiently. If it is slowly degradable you could consider advanced oxidation (using UV, ozone or peroxide but probably not chlorine due to effects on membranes).
Happy to help further as needed!
Published by Jeremy Biddle, Engineering Director at Bluewater Bio