Operational Optimization and Mass Balances in a Two-Stage MBR Treating High Strength Pet Food Wastewater

作者: C. Acharya , G. Nakhla , A. Bassi

DOI: 10.1061/(ASCE)0733-9372(2006)132:7(810)

关键词:

摘要: A two-stage membrane bioreactor (MBR) system was evaluated for the treatment of high strength pet food wastewater characterized by oil and grease, chemical oxygen demand (COD), biochemical (BOD )5 , total suspended solids (TSS), Kjeldahl nitrogen (TKN), NH4 –N TP concentrations 2,800, 25,000, 10,000, 4,500, 1,650, 1,300, 370 mg∕L respectively, to meet stringent surface discharge criteria BOD5 TSS, <10 <1 . Pretreatment dissolved air flotation effluent with FeCl3 at a dose 3.5 g∕L corresponding Fe:P molar ratio 1.3:1 affected TP, volatile (VSS), COD, TKN reductions 88, 72, 75, 11, 36, 17%, respectively. The MBR operating hydraulic retention time 5.3 days comprising 2.5 in first stage 2.8 second stage, 25 consistently met despite wide variations influent...

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