Abstract
ABSTRACT From the Indian national point of view, the importance of coal carbonizing industries is great and growing. These industries produce huge quantities of highly polluted effluents and discharge them into rivers without proper treatment. A large coke plant of Bharat Coking Coal Ltd. has been surveyed, and the impact of its effluent on surface water quality is discussed. Approximately 175-200 m3 of effluents are discharged from the plant every day. Land application has been considered as a low-cost means of disposal of coke oven effluents. Column lysimeters were prepared by collecting soil from a nearby agricultural field, putting it layerwise into a column, and compacting it carefully to simulate the original in situ conditions. Raw effluents, diluted effluent, and water (as a blank) were applied to the three lysimeters twice a week with a 5 cm flooding. Upon application of diluted effluent (1:1) into lysimeter No. 2, the leachate collected at 190 cm depth was within the tolerance limit of drinking water standard (IS 10,500). The impact of raw and diluted effluent on groundwater quality and soil are discussed. The renovation efficiency of living filter (lysimeter No. 2) was 99.37% for oil and grease, 86.92% for COD, and 53.22% for TDS, and it is estimated that 2.73 hectares of land can be irrigated with the effluents of the coke plant without deteriorating groundwater and soil quality.
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