Purification And Recovery Of Ammonium Sulphate From Acrylonitrile Plant Effluent

Abstract

With rapidly growing World population and increasing level of pollution, the protection of the Environment and the preservation of Resources have become a major issue for future technological progress. Some of the (refractory organic compounds) wastes are typical contaminants considered to be hazardous and top priority toxic pollutants. They are toxic even at low concentration. Due to their bio-refractory, bioaccumulation and carcinogenic potential, the treatment of these contaminants is very important in environmental protection. Electrochemical technologies seem to offer ideal tools for addressing above-mentioned environmental problems. In this context, electrochemical processes used for the recovery or treatment of wastewater from industry plants, play an important role. Cyanide containing wastewaters are characterized by their high toxicity and very low degradability by conventional treatments. Classified as both hazardous and toxic, Cyanide is an E.P.A designated priority pollutant. In our case, we plan to treat Acrylonitrile plant effluent having high Cyanide content (1500 – 2500 ppm), which if enters into Environment without proper treatment given to it, can be very hazardous. One of the few electrodes proven for Cyanide destruction from effluent is Boron Doped Diamond (BDD) Electrode. Diamond film has been the subject of applications and fundamental research in electrochemistry, opening up a new branch known as the electrochemistry of diamond electrodes. Recent researches have demonstrated that electrochemistry offers an attractive alternative to traditional methods for treating wastewaters containing organic compounds. Thus using BDD electrode for Electro-oxidation of Acrylonitrile plant effluent, we have reduced high Cyanide and Chemical Oxygen. Demand (COD). Ammonium Sulphate from the stream was recovered by carrying out various set of experiments whose detailed explanation are given in report with their Results and Conclusions.