A comparative study of the seasonal trend of Biological Oxygen Demand, Chemical Oxygen Demand and Dissolved Organic Matter in two fresh water aquaculture ponds of Assam

Abstract

Seasonal variation of BOD, COD and DOM were studied in two perennial aquaculture ponds located at Gauhati University Campus, Guwahati, Assam India. One of the experimental pond is manually managed with the application of lime and inorganic and organic fertilizer. The other is a naturally maintained pen culture pond recovered from a part of swamp without addition of lime and fertilizer. The reclaimed zone of natural pond is separated from the perennial swamp by bamboo screen. All the three organic parameters of water BOD, COD and DOM maintain higher profile in manually managed pond with high degree of fluctuation. Results of all three parameters verify that both the ponds are free from pollution.