Anaerobic organisms that do not need oxygen. The following treatment processes fall under this
a) Up flow Anaerobic Sludge Blanket – UASB
b) Anaerobic filter – AF
c) Anaerobic fluidized bed
Under proper conditions anaerobic sludge will develop as high density granules. These will form a sludge blanket in the reactor. The wastewater is passed upward through the blanket. Because of its density, a high concentration of biomass can be developed in the blanket.
This reactor consists of a sand bed on which the biomass is grown. Since the sand particles are small, a very large biomass can be developed in a small volume of reactor. In order to fluidize the bed, a high recycle is required.
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Urban Infrastructure and Network Study notes for M. plan Sem-III
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