Title: Integrated Effluent Treatment in Textile Industries-Feasibility Study
Abstract:Water is one of the most important commodities on earth. Population growth – coupled with industrialization and urbanization has resulted in an increasing demand for water thus leading to water crisis...Water is one of the most important commodities on earth. Population growth – coupled with industrialization and urbanization has resulted in an increasing demand for water thus leading to water crisis and serious consequences on the environment. A rapid industrialization has lead to the industrial effluents and sewage, resulting in water pollution which leads to water crisis in India and all over the world. The effluent stream coming out of the industries is mainly comprised of hazardous chemicals and heavy metals such as chromium, nickel, copper, lead and metalloid arsenic, etc. Heavy metals are very toxic in nature and harmful to the environment. The present study focuses on the improvement in wastewater treatment for a cotton textile industry located in Mumbai. The industry produces 5 lakh square meter of cloth per day with 100% cotton from 82,000 kg of cotton yarn. The wastewater generation is 2500m 3 /day. The inlet BOD and COD concentrations are 600 mg/L and 1200 mg/L respectively whereas the desired concentrations of these two parameters are < 30 mg/L and <250mg/L respectively for disposal into surface water sources. The existing treatment units comprise of Neutralization/equalization tank, Aeration tank, Reactor-I employing anaerobic biological treatment, Reactor-II employing anaerobic biological treatment, and secondary clarifier. It is observed that, presently no particular bacterium is being developed and employed either in Reactor-I or Reactor-II. The industry is able to bring down the COD and BOD levels of the treated effluent below the permissible limits for disposal into surface water by employing the above mentioned unit operations. Hence, the industry is not facing any problem from the State Pollution control Board (SPCB) with regard to discharge of wastewater into surface water sources. However, in view of no systematic development of bacteria at Effluent Treatment Plant (ETP), it is felt appropriate to study the effect of bacteria developed specifically for the biological treatment of wastewater from this industry. High levels of COD are expected from dying section due to the nature of chemicals employed in the operation. Escherichia Coli (E-Coli) type bacteria is developed in the laboratory and tested for the removal of COD from the effluents generated due to the usage of three different types of reactive dying methods viz. Exhaust, Pad-Dry-Cure, and Pad-Batch. In addition to the biological treatment, experimental study is also carried out to simulate stabilization pond and aeration tank in the lab in a series operation. Recommendations for further polishing treatment of the effluent are also addressed in the present study.Read More
Publication Year: 2012
Publication Date: 2012-10-17
Language: en
Type: article
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