Activated cow-dung slurry as a tool of pesticides bioremediation

S. Khan, A. Manchur

Abstract


A huge amount of wastes generated every year resulting from the irrational use of pesticides in the agricultural lands of Bangladesh. The present waste disposal systems are ineffective and costly relying heavily on chemical treatments. An effort was made to develop a cheap but effective bioremediation strategy by investigating the ability of cow-dung slurry to promote the growth of microorganisms capable of degrading pesticides under controlled conditions. Soil was spiked with pesticides at varying concentrations and cow-dung slurry was applied. The microbial growth was regularly monitored and the soil extracts were analyzed until the parent compound converted into less harmful intermediates. The result shows an increase in BOD while a dramatic reduction in COD indicating the ability of cow-dung slurry to promote biodegradation.

 

Key words: Bioremediation, cow-dung slurry, controlled condition, microbial consortia, pesticides


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