Nature Environment and Pollution Technology

K. S. Kumara ¹, S. L. Belagali ²

Affiliations
1 Department of Chemistry, Sri Siddhartha First Grade College, Maralur, Tumkur-572105, Karnataka, IN
2 Department of Studies in Environmental Science, University of Mysore, Mysore-570 006, Karnataka, IN

Abstract

The Tumkur city sewage samples were analysed between February 2007 and January 2008 at six sampling points symbolised as residential area (S₁), business centre (S₂), slum (S₃), converging point (S₄), open drain (S₅) and treated sewage (S₆) to assess the bacterial density and concentration of some heavy metals. The results revealed the presence of maximum bacterial population in June, and minimum in January. Systematic sampling and quantitative analysis of heavy metals such as copper, lead, zinc, nickel, cadmium, chromium, manganese and Iron have been carried out and an attempt was made to correlate heavy metal concentration to bacterial population in sewage. The bacterial population declined notably in treated sewage.

Keywords

Sewage, Heavy Metals, Coliform Bacteria.

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K. S. Kumara ¹, S. L. Belagali ¹

Affiliations
1 Department of Studies in Environmental Science, University of Mysore, Mysore-570 006, Karnataka, IN

Abstract

Sewage is domestic waste enriched with nutrients and plays vital role in water pollution. Tumkur city sewage studies were conducted during summer and monsoon (Feb. 2007 to Sept. 2007) for temperature, pH, EC, total dissolved solids (TDS), dissolved oxygen (DO), free carbon dioxide, hydrogen sulphide, BOD, COD, acidity, alkalinity, hardness, chloride, nitrate and phosphate from six sampling points namely residential area (S₁), business centre (S₂), slum (S₃), converging point (S₄), open drain (S₅) and treated (S₆). The results revealed that the EC, chloride, hardness, TDS, alkalinity and acidity were decreased, whereas pH and DO values increased in the treated sewage. The significance of closed, open drainage, converging and treated sewage chemistry results are discussed in light of the recent literature. The low cost treatment measures are suggested to reduce BOD and nutrient levels of the sewage.

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