An Evaluation of Physicochemical Properties to Assess Quality of Treated Effluents from Jaipur Dairy

The characteristics of industrial waste water vary from industry to industry and taking into consideration an important agro based sector; dairy industry, its waste are primarily composed of highly biodegradable and putrescible organic matter. This industry thereby contributes to water pollution. The effluents so generated are subjected to treatment prior its release into environment. The present study is aimed to assess the quality of effluent after treatment from the effluent treatment plant of (Saras) Jaipur Dairy. The study was carried out in months of October 2011 and January 2012. The parameters taken into consideration were colour, temperature, pH, DO, BOD, COD, alkalinity, chloride, nitrate, phosphate, hardness. The results obtained from the physicochemical analysis of treated effluent revealed optimum temperatures(19.9°C-21.6°C) for biological activity to take place, neutral to alkaline pH, low DO, high BOD, COD, nitrates and phosphates. Though, the parameters like pH, DO, Chloride, COD were in compliance with the range prescribed by ISI for the dairy sector. The ratio between BOD 5: COD in the month of October -2011 was found to be 0.42 for influent and 0.66 for effluent (aeration tank) which represents effective biodegradation; hence an eco friendly effluent, whereas in the month of January-2102, it was found to be 0.4 for both influent and effluent. The values of different parameters were expressed as Mean ± standard deviation.