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Q. A sewage treatment process in which a part of decomposer bacteria present in the waste is recycled into the starting of the process is called

Delhi UMET/DPMTDelhi UMET/DPMT 2009Environmental Issues

Solution:

The activated sludge treatment involves the decomposition of organic matter through sewage fungus and decomposer bacteria by aeration in oxidation tanks. This aeration helps in the oxidation of sludge.