唐吴晓,李卫星,邢卫红

• 1:南京工业大学化学化工学院材料化学工程国家重点实验室

摘要(Abstract)：

随着造纸行业的发展,新鲜水需求量和污水排放量剧增的问题日益突显。研究以膜生物反应器(membrane bio-reactor,MBR)处理造纸废水工艺,考察了膜孔径对过滤性能的影响并且对运行参数进行了优化,分析了膜的过滤行为和膜污染现象。结果选定膜孔径为300 nm,运行参数中优化的曝气量为1800 L·(m~2·h)~(-1),膜通量为19 L·(m~2·h)~(-1),悬浮固体颗粒浓度为6 g·L~(-1)。在此条件下运行105 d,膜性能稳定,气温的升高延长了MBR的运行周期,各项出水指标均优于原工艺二沉池水。化学需氧量、浊度、氨氮(NH_3-N)、总磷、色度和总有机碳的平均去除率分别为92%、99%、93%、73%、98%和88%。膜污染分析显示,造纸废水引起的主要污染为有机污染,但钙元素含量达9%,无机污染不可忽略。当跨膜压差升至40 KPa时,采用质量分数为0.5%的次氯酸钠(NaClO)和0.3%的柠檬酸,分别浸泡2 h,膜通量恢复率达到92%。

关键词(KeyWords)： 膜生物反应器;造纸废水;设计参数;膜污染

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑项目(2013BAE11B01);; 江苏省六大人才高峰项目(2013-XCL-027)

作者(Author): 唐吴晓,李卫星,邢卫红

参考文献(References)：

• [1]Brown K,Ghoshdastidar A J,Hanmore J,et al.Membrane bioreactor technology:a novel approach to the treatment of compost leachate[J].Waste Management,2013,33(11):2188-2194.
• [2]Simstich B,Beimfohr C,Horn H.Lab scale experiments using a submerged MBR under thermophilic aerobic conditions for the treatment of paper mill deinking wastewater[J].Bioresource Technology,2012,122:11-16.
• [3]Merayo N,Hermosilla D,Blanco L,et al.Assessing the application of advanced oxidation processes,and their combination with biological treatment,to effluents from pulp and paper industry[J].Journal of Hazardous Materials,2013,262:420-427.
• [4]Qu X,Gao W J,Han M N,et al.Integrated thermophilic submerged aerobic membrane bioreactor and electrochemical oxidation for pulp and paper effluent treatment-towards system closure[J].Bioresource Technology,2012,116:1-8.
• [5]Luo W,Hai F I,Price W E,et al.High retention membrane bioreactors:challenges and opportunities[J].Bioresource Technology,2014,167:539-546.
• [6]Martin-Pascual J,Reboleiro-Rivas P,Lopez-Lopez C,et al.Influence of hydraulic retention time on heterotrophic biomass in a wastewater moving bed membrane bioreactor treatment plant[J].International Journal of Environmental Science and Technology,2014,11(5):1449-1458.
• [7]Santos A,Ma W,Judd S J.Membrane bioreactors:two decades of research and implementation[J].Desalination,2011,273(1):148-154.
• [8]Le-Clech P.Membrane bioreactors and their uses in wastewater treatments[J].Applied Microbiology and Biotechnology,2010,88(6):1253-1260.
• [9]Hirani Z M,De Carolis J F,Adham S S,et al.Peak flux performance and microbial removal by selected membrane bioreactor systems[J].Water Research,2010,44(8):2431-2440.
• [10]SUN Fei-yun(孙飞云),LI Xiao-yan(李晓岩).Effect of soluble microbial products(SMP)and its transformation on membrane fouling in a submerged membrane bioreactor(SMBR)(浸没式MBR中溶解性微生物聚集态演变影响膜污染机理研究)[J].J Chem Eng of Chinese Univ(高校化学工程学报),2013,27(6):1064-1071.
• [11]MENG Fan-gang(孟凡刚),ZHANG Han-min(张捍民),YANG Feng-lin(杨凤林),et al.Study on the cake layer permeation in microfiltration of sludge suspension based on fractal theory(膜生物反应器中膜污染滤饼层渗透模型的研究)[J].J Chem Eng of Chinese Univ(高校化学工程学报),2006,20(5):763-768.
• [12]Judd S.The status of membrane bioreactor technology[J].Trends in Biotechnology,2008,26(2):109-116.
• [13]ZHU Dian-lin(朱殿林),GUAN Xi-jun(管锡珺),YIN Qi-zhong(殷其中),et al.Combined process of eletrolysis and membrane bioreactor for treamtment of papermaking wasterwater(电解/膜生物反应器组合工艺处理造纸废水)[J].China Water&Wastewater(中国给水排水),2010,26(1):77-82.
• [14]HU Wei-chao(胡维超).Investigate technology of paper-making wastewater treatment by MBR(膜生物反应器处理造纸废水的工艺的研究)[J].Industrial Water Treatment(工业水处理),2009,29(3):36-39.
• [15]Wang X H,Qian J J,Li X F,et al.Influences of sludge retention time on the performance of submerged membrane bioreactors with the addition of iron ion[J].Desalination,2012,296:24-29.