REDUCTION IN PHYSICO CHEMICAL PARAMETERS BY DAIRY EFFLUENT ADAPTED BACTERIA

Global environmental pollution is one of the major issues, griping earth day by day. The dairy industry effluent was the second most important single source of pollution in streams. Dairy is one of the major agriculture industries and dairy wastewater problem is larger in developing countries because all milk is processed industrially. Dairy is having particular characteristics of effluents and hence has the different effluent related problems. These problems can be revealed only after the factual study of various physico-chemical characteristics. The present study would be aimed at physicochemical characterization of untreated and treated effluent from Jaipur dairy and an attempt would be made to characterize bacterial strain from untreated effluent samples and study its effect on treated effluent in terms of COD reduction with different intervals and different inoculations. The bacteria used in the present study is a gram negative bacillus the confirmatory tests of which are under progress in our laboratory . The strain was inoculated in nutrient Broth(NB) and its O.D.660 was monitored at regular basis. The parameters taken into consideration for physicochemical characteristics were colour, temperature, pH, DO, BOD, COD, acidity , alkalinity, TDS, chloride, nitrate, phosphate, hardness, oil & greese. The values are expressed as mg/l except colour temperature and pH. The values of different parameters were expressed as Mean ± standard deviation. The study revealed that the dairy effluent is slightly alkaline in nature, and other values of treated effluent for pollution indicators like DO, COD, chloride were in compliance with ISI guidelines, so it could be concluded that the functioning of effluent treatment plant is average and it needs to be monitored at regular basis.It was observed that effective COD reduction was found in 1 % inoculum at 20 days.