OXIDATION POND

DEFINITION:

  • Popular sewage treatment method for small communities
  • Low construction costs
  • Used for simple secondary treatment of sewage effluents
  • Low operating costs
  • Also known as stabilization ponds or lagoons
  • Require maintenance and periodic desludging in order to maintain this standard.

AT LEAST TWO PONDS CONSTRUCTED

  1. First pond reduces the organic material using aerabic digestion
  1. Second pond polishes the effluent and reduces the pathogens present in sewage.

HOW OP WORK?

  • The production of this oxygen replenishes the oxygen used by the hetertrophic bacteria.
  • Typically oxidation ponds need to be less than 10 feet deep in order to support the algal growth.
  • The production of these supports the growth of algae in the oxidation pond.
  • The use of oxidation ponds is largely restricted to warmer climate regions
  • Within an oxidation pond heterotrophic bacteris degrade organic matter in the sewage

MAINTENANCE OF OP

  • The degradation is relatively slow and the effluents containing the oxidized products ned to be periodcally removed from the ponds.
  • Oxidation ponds tand to be inefficient and require large holding capacities and long retention times.
  • Oxidation ponds also tend to fill, due to the settling of the bacterial and algal cells formed during the decomposition of the sewage.