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题名: Effects of returning NF concentrate on the MBR-NF process treating antibiotic production wastewater
作者: Li, Kun; Cheng, Yutao; Wang, Jianxing; Zhang JunYa(张俊亚); Liu, Jibao; Yu, Dawei; Li, Mingyue; Wei, Yuansong
刊名: ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
出版日期: 2016-07
卷号: 23, 期号:13, 页码:13114-13127
关键词: Membrane bioreactor ; Nanofiltration ; Concentrate backflow ratio ; Antibiotic production wastewater ; Water reuse
DOI: 10.1007/s11356-016-6467-x
部门归属: 大气污染控制中心
英文摘要: The optimization of the nanofiltration (NF) concentrate backflow ratio (R-cb) and the influence of the NF concentrate on the performance of membrane bioreactor-nanofiltration (MBR-NF) process treating antibiotic production wastewater were investigated on a laboratory scale. The R-cb was optimized at 60 % based on the removal rates of chemical oxygen demand (COD) and NH4+-N by MBR. Data analyses indicated that salinity brought by NF concentrate is the major driver leading to the decrease of sludge activity, especially at a high R-cb. EPS analysis showed that electric conductivity (EC), proteins in soluble microbial products (SMP), and SMP brought by NF concentrate are the dominant factors causing the severe membrane fouling in MBR. Furthermore, undegradable substances including fulvic acid-like and humic acid-like compounds accumulated in NF concentrate showed significant influence on fouling of NF. MBR could well degrade small MW compounds in NF concentrate, which confirmed the enhancement of organic removal efficiency by recycling the NF concentrate to MBR. The MBR-NF process showed a relatively stable performance at the Rcb of 60 % (volume reduction factor (VRF) = 5), and the NF permeate could satisfy the water quality standard for fermentation process with a water recovery rate of 90.9 %.
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/311016/35748
Appears in Collections:大气污染控制中心_期刊论文

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