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Membrane-Coupled Methanogenic and Facultative Bioreactor in Wastewater Treatment

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6 Author(s)
Huey-Song You ; Ind. Technol. Res. Inst. (ITRI), Hsinchu ; Shanshan Chou ; Kuan-Foo Chang ; Ni, C.H.
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This paper evaluates the feasibility of a membrane-coupled methanogenic and facultative bioreactor (MCMFB) system in treating the wastewater from the liquid crystal display (LCD)-related industry. The treatment unit is comprised of an anaerobic (methanogenic) and an aerobic reactor. The hollow fiber membrane module (0.036 mum) was submerged in the aerobic reactor for solids/liquid separation. An average 80% COD removal was achieved in the anaerobic reactor when the volumetric loading reached 7.2 kg COD/m3 per day. The effluent of the anaerobic treatment was fed into the aerobic-membrane tank to treat the residual COD. The mixed liquor suspended solids of the aerobic tank was 7000 mg/L with an average F/M of 0.14 g COD/g SS per day, and the removal efficiency of the aerobic tank was 90% in average. The transmembrane pressure and the flux of the membrane remained stable during the entire period of the 140-day operation without any backwash or chemical wash, indicating the applicability of the MCMFB system on treating the targeted wastewater.

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Semiconductor Manufacturing, IEEE Transactions on  (Volume:20 ,  Issue: 4 )