Desalination and Water Treatment, Journal Year: 2023, Volume and Issue: 282, P. 86 - 95

Published: Jan. 1, 2023

Nowadays, the treatment of mixed domestic-industrial wastewater has gained more attention, so, main target study is to degrade through a combination primary, biological, and advanced oxidation processes.To enhance wastewater, processes coagulation, flocculation sedimentation were applied before biological treatment.The effect type dose coagulants using polyacrylamide (PAM) as coagulant aid studied.The optimized conditions selected for experiments ferric chloride alum.They showed close effectiveness since 400 mg/L was best dose, 10 PAM dose.The chemical oxygen demand (COD), (BOD 5 ), total suspended solids (TSS) removal efficiencies 58.8%, 55.9% 67.5%, respectively at alum doses.When doses sequentially, efficiency COD, BOD TSS 61.8%, 59.7% 71.1%, respectively.After primary treatment, extended aeration used aimed evaluate hydraulic retention time (HRT) on performance via aeration.The rates HRT 24 h , Kjeldahl nitrogen (TKN) 70.6%, 86.2%, 58% 70.7%, respectively.Increasing than exerted slight improvement in pollutant efficiency.After TKN effluent decreased, but values did not meet Egyptian standards.A Fenton process provided ensure that COD stipulated by regulations would be obtained final effluent.Different reaction examined, including H 2 O concentration /Fe 2+ ratios.The maximum achieved / = 4.7.In addition, five different molar ratios (20-160) tested.COD percentage 68.4% ratio 160 increased 84.9% 40.

Language: Английский