Characterization and treatability studies of tannery wastewater using chemically enhanced primary treatment (CEPT)--a case study of Saddiq Leather Works

Journal of Hazardous Materials
Sajjad Haydar, Javed Anwar Aziz

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.

References

Aug 29, 2003·Journal of the Air & Waste Management Association·Vinod TarePurnendu Bose

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Citations

Aug 10, 2011·Environmental Science and Pollution Research International·Lubna ShakirAqeel Javeed
Jan 22, 2013·Journal of Environmental Management·Massimiliano FabbricinoLuca d'Antonio
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
Dec 16, 2017·Archives of Environmental Contamination and Toxicology·Ram Naresh BharagavaDevendra Kumar Patel
Mar 24, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Weiwei ZhaoXiaocong Wang
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

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