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Environment & Health

Question
46 out of 72
 

All are true about Oxidation Pond as a method of sewage disposal except:



A Cheap method

B Mixed aerobic anaerobic method

C Suitable for large community

D Algae is source of oxygen

Ans. C Suitable for large community

Ref: Park; 22nd edi, Pg –710

  1. Oxidation pond - A cheap method of sewage treatment is the oxidation pond which has been referred to by many different names - waste stabilization pond, redox pond, sewage lagoons, etc. The term "waste stabilization pond" is more appropriate. The term 'waste' includes both sewage and industrial wastes.

  1. To qualify as an oxidation pond, there must be the presence of (1) algae (2) certain types of bacteria which feed on decaying organic matter, and (3) sun-light. sunlight is an important factor in the proper functioning of oxidation ponds. Cloudy weather definitely lowers the efficiency of the process.
  2. Oxidation ponds have become an established method of purifying sewage for small communities.

Environment & Health Flashcard List

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