期刊名称：Journal of Environmental Science and Water Resources
印刷版ISSN：2277-0704
出版年度：2012
卷号：1
期号：4
页码：85-94
出版社：Wudpecker Journals
摘要：Ethanol distillery throws 11880m 3 /day spent wash highly loaded with salts, oxygen demanding wastes and nutrients in to eva poration ponds, which percolate in to ground water and affect s its quality. The groundwater around the evaporation ponds is used as drinking water and irrigation . Thirty - five representative water samples (3 spent wash, 2 drainage water and 30 groundwater) were collected a nd analyz ed for 15 different parameters; pH, electrical conductivity, total dissolved solids (TDS), total hardness, chloride s , phosphates, alkalinity, nitrate s , sulphate s , chemical oxygen demand (COD), Na, K, Ca and Mg. The spent wash indicates a high conc entration which is above the permissible limits of National Environmental Quality standard (NEQS) for industrial effluents. Groundwater samples collected near the evaporation ponds indicate high concentrations of nitrate and COD indicating contamination of groundwater. Coefficient of correlation among the parameters, contamination index and sodium absorption ratios were calculated to correlate the sources of contamination and suitability of water for drinking and irrigation purposes. Fourteen groundwater sa mples in dicate the contamination index of more than 3 and are considered as highly contaminated
