While reading the book Environmental Engineering, by Howard S peavy in the chapter 5-2 regarding pond and system, is written that the anaerobic pond system need to have aerobic system (shallow pond) to produce satisfactory effluent. But, why is that? Can't only anaerobic system produce good effluent?

  • What type of pond? Where is the literature link? – Solar Mike Aug 10 at 6:04
  • @SolarMike It is written in book which I have edited in the question below. The pond system is an anaerobic pond system. – Mala Pokhrel Aug 10 at 6:32

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