Nitrification and mass balance with a membrane bioreactor for municipal wastewater treatment
Nitrification and mass balance with a membrane bioreactor for municipal wastewater treatment
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DOI：
10.1016/0273-1223(96)00502-1
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发表时间：
1996-01-01
影响因子：
2.7
通讯作者：
Manem, J
中科院分区：
文献类型：
--
作者：
Fan, XJ;Urbain, V;Manem, J
研究了膜生物反应器（MBR）处理城市污水的整体性能，以确定不同污泥滞留时间（SRT）和水力滞留时间（HRT）下活性污泥的特性。试验为期300 d，分4组进行。在所有测试条件下，MBR工艺的出水水质在COD和悬浮物方面都很好。在稳定运行状态下，测定了活性污泥的比硝化率。以NH4Cl为底物或原液为底物的批量实验均获得了相似的最大硝化速率值。对该工艺在GOD、氮和无机悬浮物方面进行了质量平衡，发现在srt为20、10和5天时，进水COD分别有28%、42%和48%被吸收到活性污泥中。活性污泥的COD/VSS比似乎与质量加载率有关。活性污泥的真实产率系数和衰减率系数分别为0.61 kgCOD/kgCOD和0.650 d（-1）。在完全好氧系统中，氮平衡始终接近100%。版权所有1996年IAWQ。
The overall performance of the Membrane Bioreactor (MBR) process for municipal wastewater treatment was studied to determine the characteristics of activated sludge under different Sludge Retention Times (SRT) and Hydraulic Retention Times (HRT). The experiment lasted over a period of 300 days, which included 4 runs. The effluent quality of the MBR process in terms of COD and suspended solids, was excellent under all conditions tested. Specific nitrification rates of the activated sludge were measured at steady state in each run. Similar maximum nitrification rate values were obtained through batch experiments with either only NH4Cl or raw wastewater as substrate. Mass balances of the process in terms of GOD, nitrogen and inorganic suspended solids were made, and it was found that 28%, 42%, and 48% of influent COD were convened into activated sludge at SRTs of 20, 10, and 5 days, respectively. The COD/VSS ratio of the activated sludge seems to be dependent on mass loading rate. The estimated true yield and decay rate coefficients of the activated sludge were 0.61 kgCOD/kgCOD and 0.650 d(-1), respectively. In the completely aerobic system, nitrogen balances were always close to 100%. Copyright (C) 1996 IAWQ.