PERFORMANCE EVALUATION OF COMMON EFFLUENT TREATMENT PLANTS OF DELHI

Abstract

The concept of effluent treatment, by means, of a collective effort, has assumed reasonable gravity by being especially purposeful for cluster of small scale industrial units. Common effluent treatment plant (CETP) not only helps the industries in easier control of pollution, but also act as a step towards cleaner environment and services to the society at large. Establishment of CETP shows positive approach of industries Associations towards pollution control. Performance evaluation can help in continual improvement in performance of CETPs. The present study relates to performance evaluation of 11 Common effluent treatment plants treating the effluents generating from cluster of small scale industry in the Delhi region. Wastewater from about 7,000 thousand small-scale industries is treated in these CETPs. The chemical parameters which were monitored are 01, COD, BOD, TSS, TDS, and Oil & Grease. It was found that most of the CETPs were under utilized as they were receiving effluent very low than their design capacity. The industrial units were-not providing desired primary treatment before sending to CETP. It was found that only three CETPs viz. GT Karnal Road, Badli, and Narela were complying the stipulated standards in all respect. All the CETPs were in operation but the Wazirpur CETP was closed due to high level of pH (<2) in the effluent wastewater. Biological treatment has been carried out only in Mangolpuri CETP. After treatment, the effluent is disposed off in Yamuna through drain. The groundwater samples were taken from each of the CETP area to find out the Total dissolved solid (TDS) in the groundwater. The TDS level in Mangolpuri, Lawrence Road, Nangloi, and Jhilmil groundwater samples were not complying the prescribed standards.