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题名: Biogas-pH automation control strategy for optimizing organic loading rate of anaerobic membrane bioreactor treating high COD wastewater
作者: Yu, Dawei; Liu, Jibao; Sui, Qianwen; Wei, Yuansong
刊名: BIORESOURCE TECHNOLOGY
出版日期: 2016-03
卷号: 203, 期号:0, 页码:62-70
关键词: Anaerobic membrane bioreactor ; High COD wastewater ; Online monitoring ; Automation control strategy ; Alkalinity
DOI: 10.1016/j.biortech.2015.12.010
部门归属: 大气污染控制中心
英文摘要: Control of organic loading rate (OLR) is essential for anaerobic digestion treating high COD wastewater, which would cause operation failure by overload or less efficiency by underload. A novel biogas-pH automation control strategy using the combined gas-liquor phase monitoring was developed for an anaerobic membrane bioreactor (AnMBR) treating high COD (27.53 g.L (1)) starch wastewater. The biogas-pH strategy was proceeded with threshold between biogas production rate >98 Nml.h (1) preventing overload and pH > 7.4 preventing underload, which were determined by methane production kinetics and pH titration of methanogenesis slurry, respectively. The OLR and the effluent COD were doubled as 11.81 kgCOD.kgVSS (1).d (1) and halved as 253.4 mg.L (1), respectively, comparing with a constant OLR control strategy. Meanwhile COD removal rate, biogas yield and methane concentration were synchronously improved to 99.1%, 312 Nml.gCOD(in)(1) and 74%, respectively. Using the biogas-pH strategy, AnMBR formed a "pH self-regulation ternary buffer system" which seizes carbon dioxide and hence provides sufficient buffering capacity. (C) 2015 Elsevier Ltd. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35736
Appears in Collections:大气污染控制中心_期刊论文

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