Removal of organic substances in aerobic and anaerobic brouch tannery wastewater

Subject Areas : The Application of Chemistry in Environment

Ahmad Asl hashemi ¹ (Department of Environmental Health Education, Tabriz University of Medical Sciences)

Received: 2022-03-09 Accepted : 2022-11-07 Published : 2021-12-22

Keywords: wastewater, Aerobic, : Organic materials, Leather making, anaerobic treatment,

Abstract :

The organic load of the crude leachate solution and the effluent of the anaerobic solution are determined by DOC and UV 254 and the role of molecular weight is investigated by ultrafiltration. On average, by GC-Us 77 analysis, the specific composition in crude wastewater is detected and the values are between 17-81 mg / c. 80% of these compounds have been identified and classified into 12 groups, of which aromatic carboxylates and short chains and dicarboxylates are predominant in raw wastewater.Keywords: Organic materials, Wastewater, Leather making, Aerobic and anaerobic treatment. The average DOC content in raw wastewater is 900 mg / l, which corresponds to a discharge of 23 kg / ton of raw leather. Several toxic compounds in crude wastewater are identified by GC-Us analysis, with P-cersol and mercaptonendo thiozyl present significantly. These compounds are only tested to a limited extent by a light-limiting test. Subsequent aerobic treatment leaves an average of 15% of the raw wastewater DOC and 50% of the UV254. Finally, the quality of the effluent in the combined aerobic-anaerobic method is compared with the anaerobic method. The anaerobic phase is also effective in reducing the amount and number of compounds measured with low molecular weight. Despite substantial improvements in the quality of wastewater leathery, resistant materials and even materials that may be deformed during anaerobic-aerobic treatment are of environmental concern.