Abstract
Chemically enhanced primary treatment (CEPT) is a technology that uses coagulants for enhanced pollutants removal at the primary stage of the wastewater treatment. This paper presents the detailed characteristics of tannery wastewater. It also explains effectiveness of CEPT in removing pollutants from tannery wastewater using various metal salts. The results of this study demonstrated that the tannery effluent had high concentrations of organic matter, solids, sulfates, sulfides and chromium. Alum, ferric chloride and ferric sulfate were tested as coagulants using jar test apparatus. Alum was found to be the suitable coagulant for tannery wastewater in a dose range of 200-240 mg/L as Al(2)(SO(4))(3). With alum, percentage removal efficiency for turbidity, total suspended solids (TSS), chemical oxygen demand (COD) and chromium was found to be 98.7-99.8, 94.3-97.1, 53.3-60.9, and 98.9-99.7%, respectively. National effluent quality standards for total suspended solids and chromium were met after CEPT. However, COD content was high, emphasizing the need of secondary treatment for the tannery effluent.
Citations
Aug 10, 2011·Environmental Science and Pollution Research International·Lubna ShakirAqeel Javeed
May 9, 2012·Journal of Analytical Methods in Chemistry·Mahwish BukhariM Anwar Baig
Jun 1, 2014·Bioresource Technology·Kumarasamy MurugesanJonathan W C Wong
Jan 22, 2013·Journal of Environmental Management·Massimiliano FabbricinoLuca d'Antonio
Sep 25, 2012·Journal of Hazardous Materials·Gabriela DotroMark Fitch
Apr 24, 2012·Environmental Toxicology and Pharmacology·Lubna ShakirAqeel Javeed
Jun 25, 2014·Environmental Technology·Maria Claudia HasegawaSandra M C P da Silva
Aug 3, 2016·Environmental Science & Technology·Francis A MeerburgSiegfried E Vlaeminck
Jul 1, 2017·Environmental Technology·Xiao-Ling Zou
Dec 16, 2017·Archives of Environmental Contamination and Toxicology·Ram Naresh BharagavaDevendra Kumar Patel
Feb 17, 2018·3 Biotech·M MaheshG Sekaran
Apr 12, 2019·Critical Reviews in Biotechnology·Tao LiuJianhua Guo
Mar 24, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Weiwei ZhaoXiaocong Wang
Jul 29, 2016·Applied Microbiology and Biotechnology·Feng JuTong Zhang
Jun 18, 2017·International Journal of Phytoremediation·Sobia AshrafZahir Ahmad Zahir
Aug 5, 2019·Environmental Monitoring and Assessment·Mariana Antonio de Souza PereiraFernando Jorge Correa Magalhães Filho
Nov 23, 2019·Materials·Violetta KozikAndrzej Bak