RESEARCHING ON TREATING WASTEWATER FROM PRODUCTION OF CANNA VERMICELLI BY ACTIVATED SLUDGE TECHNOLOGY

Abstract

Canna wastewater has high contents of pollutants; BOD5 from 209 to 325mg/L; COD 460.8-891.0 mg/L; SS 625-766 mg/L and pH 2.48-3.0. This study was conducted to determine the optimum parameters for the design of a biological treatment system for Canna wastewater. The results show that with a PAC concentration of 200 mg/L. The SS treatment efficiency is 95-97% SS; Biomass content of 3000mg/L; The  retention time of 6 hours, the treatment efficiency ranges from 84.0 to 89.3%. The effluent reaches the industrial waste water standards; The rate of biomass growth increased from 19.72-21.98%; The range for optimal SVI can be between 105 and 127ml/g.