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首页> 外文期刊>Journal of environmental sciences >Pollutants removal and simulation model of combined membrane process for wastewater treatment and reuse in submarine cabin for long voyage
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Pollutants removal and simulation model of combined membrane process for wastewater treatment and reuse in submarine cabin for long voyage

机译：长程海底船舱污水处理与回用联合膜工艺污染物去除与模拟模型

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A laboratory scale test was conducted in a combined membrane process (CMP) with a capacity of 2.91 m~3/d for 240 d to treat the mixed wastewater of humidity condensate, hygiene wastewater and urine in submarine cabin during prolonged voyage. Removal performance of chemical oxygen demand (COD), ammonia nitrogen ((NH_4)~+-N), turbidity and anionic surfactants (LAS) was investigated under different conditions. It was observed that the effluent COD, (NH_4)~+-N, turbidity and LAS flocculated in ranges of 0.19-0.85 mg/L, 0.03-0.18 mg/L, 0.0-0.15 NTU and 0.0-0.05 mg/L, respectively in spite of considerable fluctuation in corresponding influent of 2120-5350 mg/L, 79.5-129.3 mg/L, 110-181.1NTU and 4.9-5.4 mg/L. The effluent quality of the CMP could meet the requirements of mechanical water and hygiene water according to the class I water quality standards in China (GB3838-2002). The removal rates of COD, (NH_4)~+-N, turbidity and LAS removed in the MBR were more than 90%, which indicated that biodegradation is indispensable and plays a major role in the wastewater treatment and reuse. A model, built on the back propagation neural network (BPNN) theory, was developed for the simulation of CMP and produced high reliability. The average error of COD and (NH_4)~+-N was 5.14% and 6.20%, respectively, and the root mean squared error of turbidity and LAS was 2.76% and 1.41%, respectively. The results indicated that the model well fitted the laboratory data, and was able to simulate the removal of COD, (NH_4)~+-N, turbidity and LAS. It also suggested that the model proposed could reflect and manage the operation of CMP for the treatment of the mixed wastewaters in submarine.
机译：实验室规模的试验以2.91 m〜3 / d的联合膜工艺（CMP）进行，持续240 d，以处理长时间航行中海底舱室中的冷凝水，卫生废水和尿液的混合废水。研究了不同条件下化学需氧量（COD），氨氮（（NH_4）〜+ -N），浊度和阴离子表面活性剂（LAS）的去除性能。观察到废水的COD，（NH_4）〜+ -N，浊度和LAS分别在0.19-0.85 mg / L，0.03-0.18 mg / L，0.0-0.15 NTU和0.0-0.05 mg / L的范围内絮凝。尽管相应进水分别有2120-5350 mg / L，79.5-129.3 mg / L，110-181.1NTU和4.9-5.4 mg / L的较大波动。 CMP的出水水质符合中国一级水质标准（GB3838-2002）的要求，可满足机械水和卫生用水的要求。 MBR中COD，（NH_4）〜+ -N，浊度和LAS的去除率均在90％以上，说明生物降解是必不可少的，在废水处理和回用中起着重要作用。建立了基于反向传播神经网络（BPNN）理论的模型，用于CMP的仿真，并且具有很高的可靠性。 COD和（NH_4）〜+ -N的平均误差分别为5.14％和6.20％，浊度和LAS的均方根误差分别为2.76％和1.41％。结果表明，该模型与实验室数据吻合良好，能够模拟出COD，（NH_4）〜+ -N，浊度和LAS的去除率。这也表明，所提出的模型可以反映和管理CMP在处理海底混合废水中的运行。

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