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首页> 外文期刊>Separation and Purification Technology >Enhanced treatment of coke plant wastewater using an anaerobic-anoxic-oxic membrane bioreactor system
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Enhanced treatment of coke plant wastewater using an anaerobic-anoxic-oxic membrane bioreactor system

机译：使用厌氧-缺氧-氧化膜生物反应器系统增强对焦化厂废水的处理

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A laboratory-scale anaerobic-anoxic-oxic membrane bioreactor (A1 /A2 /O-MBR) system was used to treat heavily loaded and toxic coke plant wastewater and operated for more than 500 d. Treatment performance, acute toxicity assessment, and dissolved organic characteristics of the A1 /A2/O-MBR system were investigated. The present (A1 /A2/O-MBR) system was more efficient and reliable in pollutants and acute toxicity reduction than the conventional anaerobic-anoxic-oxic system tested in parallel as control especially at high and varying loading rates. When the total hydraulic retention times of the A1/A2/O-MBR system was 40 h, the average effluent COD, phenol, NH3-N, TN concentrations and acute toxicity were 264 ± 36 mg/L, 0.2 ± 0.1 mg/L, 0.8 ± 1.0 mg/L, 112 ± 47 mg/L and 0.17 ± 0.01 mg/L (Zn~(2+) toxicity reference), with removals of 89.8 ±1.2%, >99.9%, 99.5 ±0.7%, 71.5 ±7.8% and 98.3 ±0.3%, respectively. Hydrophobic/hydrophilic fractionation indicated that the hydrophobic acids were the most abundant fraction of dissolved organic matters in influent and effluent, accounting for 70.3%, 67.2% of total dissolved organic carbon, and 75.0%, 76.2% of total colour intensity, respectively. The hydrophilic substances of the oxic supernatant could be rejected effectively by the membrane. Fluorescence excitation-emission matrix (EEM) analysis suggested that humic substance-like matters were potentially refractory and colour causing matters in coke plant wastewater.
机译：实验室规模的厌氧-缺氧-氧化膜生物反应器（A1 / A2 / O-MBR）系统用于处理重载和有毒的焦化厂废水，并运行500 d以上。研究了A1 / A2 / O-MBR系统的处理性能，急性毒性评估和溶解的有机特性。目前的（A1 / A2 / O-MBR）系统在污染物和急性毒性降低方面比并行作为对照进行测试的常规厌氧-缺氧-氧气系统更有效，更可靠，特别是在高负载率和变化负载率下。当A1 / A2 / O-MBR系统的总水力停留时间为40 h时，平均出水COD，苯酚，NH3-N，TN浓度和急性毒性分别为264±36 mg / L，0.2±0.1 mg / L ，0.8±1.0 mg / L，112±47 mg / L和0.17±0.01 mg / L（Zn〜（2+）毒性参考），去除率为89.8±1.2％，> 99.9％，99.5±0.7％，71.5 ±7.8％和98.3±0.3％。疏水/亲水分馏表明，疏水酸是进水和出水中溶解有机物的最丰富部分，分别占总溶解有机碳的70.3％，67.2％和总色强度的75.0％，76.2％。含氧上清液的亲水性物质可以被膜有效地排斥。荧光激发-发射矩阵（EEM）分析表明，腐殖质样物质在焦化厂废水中具有潜在的难熔性和成色性。

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