Journal of FARM SCIENCES, Vol 28, No 4 (2015)

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Composition of domestic and industrial wastewaters and their effect on available nutrients in soils

Hanamantarao Jogan, G.S. Dasog

Abstract


Water scarcity and wastewater management are twin problems which need to be addressed to benefit agricultural production. In this context composition of wastewaters from three industries, namely Ugar Sugar Works, Ugar Khurd; West coast paper mill, Dandeli; Nectar beverages, Dharwad and a domestic sewage water from UAS campus, Dharwad in north Karnataka was determined. Wide variation in wastewater chemical composition was recorded. Biomethanated spentwash from the Ugar Sugar Works distillery was characterized by its high pH, EC, total soluble solids, total dissolved solids, biological oxygen demand, chemical oxygen demand, total nitrogen, phosphate, potassium and sulphate concentration and was markedly different from the rest. Lead and chromium were detected in these waters but their concentration was below the permissible limits. A column study was set up including red, black and lateritic soils filled to a depth of 60 cm with three replications. Among the wastewaters, biomethanated spentwash resulted in greater available nutrients in all soils studied followed by treated Paper mill wastewater. All the available nutrients were highest in the surface soil (0-15 cm) compared to subsurface depths in all soils and with all wastewaters

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