Enhancement of organic removals in high strength herbal pharmaceutical wastewater.
Herbal Pharmaceutical wastewater was subjected to physico-chemical treatment using conventional coagulants individually and in combination with different anionic, cationic and nonionic polyelectrolytes. Results indicate cationic polyelectrolyte to be the best polymer. Individually Alum did not give good results but Alum with cationic polymer in the ratio of 300:0.25 mg l(-1) resulted in the best removals of Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD) and Suspended Solids (SS) of 64.0%, 69.4% and 80.82% respectively. The next combination which resulted in good removals was Lime: cationic polymer in the ratio of 300:0.20 mg l(-1) with COD, BOD, and SS removals of 57.6%, 65.1% and 74.0%, respectively. Overall the studies indicated that the herbal pharmaceutical wastewater needs to be treated by physico-chemical treatment as a primary process to reduce the organic load and increase the performance efficiency of the secondary biological treatment process. This paper discusses in detail the studies carried out using conventional coagulants along with synthetic polyelectrolyte.
Vanerkar
A P
AP
WWT Division, National Environmental Engineering Research Institute, Nehru Marg, Nagpur 400 020, India.
Satyanarayan
S
S
Dharmadhikari
D M
DM
D019149:Bioreactors; D003029:Coagulants / Q000737:chemistry; D004573:Electrolytes / Q000737:chemistry; D007220:Industrial Waste; D009930:Organic Chemicals / Q000302:isolation & purification*; D028321:Plant Preparations; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D003029:Coagulants; D004573:Electrolytes; D007220:Industrial Waste; D009930:Organic Chemicals; D028321:Plant Preparations