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Published:
Oct 16, 2012Keywords:
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Main Article Content
Stratification in Waste Stabilization Ponds I: Effects on Pond Parameters
Abstract
Stratification studies were carried out on the waste stabilization pond system at the University of Nigeria, Nsukka, Nigeria. Analysis of the samples collected with a water column sampler at 5cm and 0.1m apart showed some stratification of temperature, algae, pH, dissolved oxygen, coliform bacteria, chemical oxygen demand and nutrients. Coliform-bacteria numbers were lowest at positions in the water column where pH, temperature, dissolved oxygen and algae were high. The distribution and variation of both the physiochemical and biological characteristics inside the water body were found to be influenced by thermal stratification. Maximum temperature, DO and pH was observed at the surface layer. The vertical distribution of BOD5, COD, Coliform bacteria, phosphorus and ammonia nitrogen showed maximum concentration at the bottom layer.
