Anaerobic membrane bioreactor (AnMBR) for bamboo industry wastewater treatment

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• 作者：Wei Wang ; Qi Yang ; Shuangshuang Zheng ; Donglei Wu
• 关键词：BIWW ; AnMBR ; N2 flushing ; HRT ; GC&ndash ; MS
• 刊名：Bioresource Technology
• 出版年：December, 2013
• 年：2013
• 卷：149
• 期：Complete
• 页码：292-300
• 全文大小：555 K

文摘

Bamboo industry wastewater (BIWW) poses severe environmental problems because of its high organic matter content. In this study, anaerobic membrane bioreactor (AnMBR) was applied for BIWW treatment. During the start-up stage, the system presented an effective degradation with a final COD removal of 91%. Compared to the intermittent mode, a higher membrane rejection (45% COD, 60% NH₃-N) was obtained when the system was operated continuously. N₂ flushing was applied for membrane cleaning, and the cleaning efficiency was significantly influenced by the hydraulic retention time (HRT). While operated under HRT 猢?#xA0;5 d, membrane fouling could be effectively controlled. Scanning electron microscopy-energy dispersive X-ray (SEM-EDX) analysis indicated the membrane top area suffered the most serious fouling. Gel permeation chromatography (GPC) and gas chromatography-mass spectrometry (GC-MS) analyses revealed most organic matter in BIWW was eliminated by AnMBR. However, benzene and fluoro derivatives were detected in the permeate as the by-products.