WATER QUALITY MODELING TO PREDICT IMPACT OF COFFEE PULPING WASTEWATER ON RIVER CAUVERY
In the current review an attempt has been made to anticipate the influence of coffee pulping wastewater dumping into the river Cauvery. The coffee pulping wastewater is a high strength complex wastewater characterized by low pH with high COD, ammonia nitrogen, nitrate nitrogen and phosphorus causing rapid decrease of Dissolved Oxygen (DO) after its disposal to any natural water body. Thus, impactfrom the disposal of raw coffee pulping wastewater on DO level in river Cauvery has been predicted using MULTMIX programme. MULTMIX model was used to predict the combined impact of two outfalls. In the treatability study of coffee pulping wastewater Electrocoagulation (EC) treatment and Electrocoagulation Anaerobic Sequencing Batch Reactor (EC+ASBR) coupled treatment was chosen with an aim to reduce the Biochemical Oxygen Demand (BOD) upto 80%. Treated wastewater characteristics done using laboratory scale reactor, was input for the model, and thus the optimal BOD to maintain permissible DO in the river was predicted. Based on the results obtained, this study presents suitable treatment method for treating coffee pulping wastewater which can be further disposed to the water bodies which will reduce impact in terms of river water pollution. Using mathematical models the carrying capacity of the river Cauvery was determined to mitigate the pollution load from coffee processing units.
ASHA G, MANOJ KUMAR B, PRASAD CSMV