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Abstract

SURVEY OF SURFACE WATER BODIES’ POLLUTION DUE TO WASTEWATER DISCHARGE FROM UNORGANIZED AUTOMOBILE SERVICE STATIONS LOCATED IN THE RESIDENTIAL SECTOR OF RAJAJINAGAR, BENGALURU, KARNATAKA, INDIA

Prof. Sripathy L., Goutham Raghavendra C. K.* and Nithin C. V.

ABSTRACT

An increase in vehicle number in and around Rajajinagar has contributed indirectly to water pollution problems occurred in this area. The present study is aimed to prove this hypothesis correct by estimating the pollution potential of wastewaters from Automobile Service Stations at Rajajinagar. Automobile service stations are rapidly increasing in Rajajinagar with the increase in mobile population due to industrialization and IT resulting in urbanization by which means and methods of transportation are necessarily expanding with a population. On an average 20 to 30 vehicles are washed daily at every car wash facility and each vehicle takes an average of 161.4 to 227.4 liters of water depending on the size of vehicle. Wastewaters from such facilities contribute significantly to effluents and sewage from this area that is let into water bodies of Bengaluru. Adding to that most of the automobile service stations are located in developed areas and are inefficient in the treatment of effluents since it requires a sufficient land area distinctly. Wastewaters samples from different service stations of Rajajinagar, Basaveswaranagar were collected to analyze physico-chemical parameters such as BOD, COD, Oil & Grease, pH, Alkalinity, Sulphates, Phosphates, Chlorides, Suspended solids, Settable solids and Heavy metals like Iron, Chromium, Zinc, Lead. The result of laboratory analysis showed those BOD 5 times, COD 7 times, Oil & Grease 107 times, iron 2 times and settable solids 2 times greater than BIS (Bureau of Indian Standards) values for tolerance limit for effluents respectively. Significantly present Oil & Grease, along with other contaminant deposits on the surface of water bodies cause DO depletion, impairment in photosynthesis, fatal to aquatic life, toxicity to water resources, and human life. The study was conducted to address the effluent conditions prevalent at the service stations of Rajajinagar, Basaveswaranagar for Bruhat Bengaluru Mahanagara Palike (BBMP) and Karnataka State Pollution Control Board (KSPCB) to point out the present practices adopted and the potential impacts of these haphazard practices on water bodies and life depending on them.

Keywords: Pollution, Surface water bodies, Automobile service stations, Bengaluru.


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