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Assessment of treatment capabilities of Varthur Lake, Bangalore, India

Mahapatra, Durga Madhab and Chanakya, HN and Ramachandra, TV (2011) Assessment of treatment capabilities of Varthur Lake, Bangalore, India. In: International Journal of Environmental Technology and Management, 14 (4). pp. 84-102.

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Abstract

Manmade waterbodies have traditionally been used for domestic and irrigation purposes. Unplanned urbanization and ad-hoc approaches have led to these waterbodies receiving untreated sewage. This enriches and eutrophies the waterbody. A physicochemical and biological analysis of sewage-fed Varthur Lake in Bangalore was carried out and its treatment capabilities in terms of BOD removal, nutrient assimilation and self-remediation were assessed. Anaerobic conditions (0 mg/L) prevail at the inlet which improves towards the outlets due to algal aeration. This removed > 50% BOD in the monsoon season but was inhibited by floating macrophytes in all other seasons. Alkalinity, TDS, conductivity and hardness values were higher when compared to earlier studies. This study shows the lake behaves as an anaerobic~aerobic lagoon with a residence time of 4.8 d treating the wastewater to a considerable extent. Further research is required to optimise the system performance.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Inderscience Publishers.
Keywords: Nutrients;eutrophication;lagoon;sewage;urban lakes.
Department/Centre: Division of Earth and Environmental Sciences > Center for infrastructure, Sustainable Transportation and Urban Planning (CiSTUP)
Date Deposited: 02 Feb 2012 06:25
Last Modified: 02 Feb 2012 06:25
URI: http://eprints.iisc.ernet.in/id/eprint/43242

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