[Digestion] Help needed

[Amy and Jim Rankin]

AD on the whole volume of sewerage is usually not economically appealing because of the construction costs to build a large AD plant and the lower yield of biogas per volume of plant capacity.  Where I have seen municipal waste water plants using anaerobic digestion for many years is on the settled sludge fraction.  This has the majority of the nutrients and occupys a much smaller volume than the sewerage as it comes out of the pipe. 

Jim

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