An extensive pilot trial based on full-scale MBR membrane modules has been conducted by the Department of Environmental Engineering and Science, Chia Nan University, at an industrial site in Taiwan. The work included measurement of the sludge and foulant characteristics.
The 10 m³/d plant compromised a 10 m³ buffer tank followed by process and membrane tanks each having an 8.7 m³ working volume (and thus providing 42 h HRT). The plant was challenged with wastewater at 16-28˚C and generally between 800 and 12,000 mg/L COD concentration derived from combined pharmaceutical and septic tank effluent.
The MLSS concentration was increased from 6,00 to 12,000 over an initial operating period of 80 d, and was then operated at 12,000-17,000 mg/L solids concentration for a further 40 d. The viscosity was found to vary logarithmically with MLSS over the entire concentration range studied. At a mean SRT of 40 days and COD loading of 0.099-6.488 kgCOD/(m³.d).
The Coosur plant in Jaén in Spain generates an average daily effluent flow of 100 m³/day (120 m³/day peak) from olive oil production. A DAF process, pH-adjusted from 3.5 to 6.5 and dosed with coagulant and flocculant, is installed upstream of the MBR.
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A complete wastewater treatment plant for a multinational pharmaceutical plant in Taizhou, Zhejiang Province, China was completed in December 2012. The plant was designed by the Portuguese company Valorsabio in collaboration with Shanghai MegaVision Membrane Engineering & Technology Co. Ltd
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