Advantages Over Conventional Treatment
Conventional treatment settles sludge which is then digested, and then aerates the remaining liquids which use bacteria to oxidise the potential digester fuel, and uses up energy to drive the compressors. The result is that on a standard western treatment works the energy produced from settled sludge digestion is all used by the aeration process, with little power export.
With UASB the aeration the whole process of settlement and digestion occurs in one or more large tank(s). Only the post UASB liquids, with a much reduced BOD needs to be aerated.
This leads to a halving of the aeration energy and a doubling of the power generated from digestion, leading over all to a tripling of power generated.
Read more about this topic: Upflow Anaerobic Sludge Blanket Digestion
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