Chemical Industry Wastewater Treatment Using Adsorption
نویسنده
چکیده
In a typical wastewater treatment fl ow sheet used by several industrial units in Indi a. various stages of treatment include primary treatment. foll owed by secondary treatment . and tertiary treatment. The concentration of total dissolved solids increases during neutrali zation of the wastewater with acid/ alkali during primary treatment. which adversely affects the activity of microorgani sms during biological treatment. The present study aims at demonstrating that adsorption as the Iirst stage of treatment shall increase efficiency of the subsequent biological treatment. Experiments were carried out on different wastewater sampl es from chemical pl ants on adsorbents viz. acti vated carbon. bentonite. and lignite. The effecti veness of adsorbents in the removal of refractory organics by way of reducing chemical oxygen demand and colour is evaluated. The results of COD reduction are fitted into diffe rent models ava ilable in literature including the new model Rat"i Puranik equation . which requires least experimentati on for predicting COD values.
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