International Journal of Chemical Studies
Vol. 1, Issue 6 (2014)
Treatment of Textile Wastewater by Electro-coagulation and Activated Sludge Process
Author(s): Md. Nazmul Hassan, Md. Moniruzzaman, A.N.M Hamidul Kabir, Md. Moshikur Rahman, Md. Rafiqul Islam
Abstract: Environment friendly wastewater treatment method is the biggest challenge faced by textile industries. Water system around Dhaka City Corporation experiences high concentration of COD and color in the discharge effluent into environment by textile industries. Lack of appropriate treatment facility for wastewater exceeds the standard discharge limits. Conventional wastewater treatment methods become decisive challenge to environmental engineers for increasing more and more restrictive effluent by water and industrial discharges. Biologically treated discharges will no longer be reduced textiles dyes or color as 53% of 87 colors are identified as non-biodegradable. On the other hand, electro-coagulation or coagulation method produces a huge amount of hydroxide sludge that is harmful for our environment. The purpose of this study is to investigate a single treatment method that is properly and effectively treated different types of textile effluent. Electro-coagulation method for treatment of textile effluent and reduction of COD, BOD and color from effluent is compared with activated sludge process. The chemical and biological oxidation is carried out using electro-coagulation and bacillus bacteria respectively without adjustment pH of the wastewater sample. In this work, the comparison of the efficiency of electro-coagulation and activated sludge process for COD, BOD and color removal of different textile industries in Bangladesh are investigated. Electro-coagulation or coagulation method and activated sludge process results are not satisfied to protect our ecology and human health, so combined method of wastewater treatment is necessary. From cost estimation and practical performance of different treatment methods textile wastewater revealed high susceptibility to treat the effluents using electro-coagulation and biological method separately. Effluent characteristics such as color and chemical oxygen demand (COD) are reduced by considerable amount by electro-coagulation method but in activated sludge process marked degradation of pollutants than coagulation method. If we combined at first electro-coagulation then activated sludge process, a better result will be found that is more effective and economical than any single method because non-biodegradable organic matters are not destroyed by activated sludge process, so combination of methods is necessary.
Fig. 1: COD of wastewater and treated wastewater by electro-coagulation and activated sludge process.
Pages: 58-63 | 1309 Views 21 Downloads
How to cite this article:
Md. Nazmul Hassan, Md. Moniruzzaman, A.N.M Hamidul Kabir, Md. Moshikur Rahman, Md. Rafiqul Islam. Treatment of Textile Wastewater by Electro-coagulation and Activated Sludge Process. Int J Chem Stud 2014;1(6):58-63.