Evaluation Studies on Hybrid up Flow Anaerobic Sludge Blanket Reactor for Treating Dairy Effluent under Different Season.

摘要

Dairy industries have shown us great growth in size and number in most countries of the world. In recent times, the dairy industries have started incorporating sophisticated processing equipments with CIP cleaning systems and PLC based process automation systems. The dairy mill effluent is characteristically biodegradable with BOD 5, of 2500-3500 mg/l and COD restricted to 4000-5000 mg/l and pH from 5.6-8.6 .The biodegradability range of dairy effluent is from 0.63 to 0.72 .The hybrid anaerobic reactor is assessed with a pilot model (8 litres) for the treatment of dairy effluent .The present study evaluates the performance of hybrid anaerobic reactor under different seasons, viz , rainy and winter for treating dairy effluent .The model was made run under varying operating conditions , viz ,influent flow rate(2.083,2.500,3.571,5.000,8.330lit/hr) and influent COD (1599.88,2091.98,2564.46 mg/l), OLR(Rainy season) (0.025,0.031,0.036 kg/COD/m2 day),(winter season)(0.018,0.026,0.032kg/COD/m2 day) and HRT (6.00,10.00,14.00,20.00,24.00hrs)are interpreted for the respective conditions .The COD removal was observed for minimum of 78.10% starting from 78.86% for rainy season and maximum of 79.10% from 80.61%COD removal for winter season .