中试 MBR+RO组合工艺深度处理化工废水研究
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摘要
为了降低新鲜水的需求量,缓解水资源压力,对某化工园区污水处理厂进行了提标改造及再生水回用。以混凝沉淀+A~2/O为预处理工艺,构建中试MBR+RO组合系统,深度处理及再生利用化工废水,考察了MBR工艺作为RO预处理的可行性以及组合系统的处理性能,分析了MBR膜组件及RO膜组件的污染情况,评价了最终处理成本。研究表明,废水经过混凝沉淀+A~2/O预处理后进入MBR+RO组合系统,最终出水ρ(COD)≤10 mg/L,ρ(NH~+_4-N)≤2 mg/L,ρ(SS)≤1 mg/L,ρ(TP)≤1 mg/L,水质达到城市污水再生利用工业用水标准(GB/T 19923-2005);MBR膜跨膜压差稳定在18 kPa,说明没有发生膜污染;RO膜渗透系数稳定在4 L/(min·MPa),也没有发生污染;中试系统吨水电耗为1.890 kW·h。高性能再生水水质具有明显优势,降低了企业的运行成本。
In order to reduce the demand of fresh water and ease the pressure about water resources, it is proposed to carry out bid improvement and recycling water reuse of the sewage treatment plant in the park. The combined MBR+RO process pilot system, using flocculation +A~2/O technology as a pre-treatment process, has been set up for the advanced treatment and recovery. The objective of this pilot study is to further investigate the feasibility of MBR system as a pre-treatment process for RO permeation. The treatment performance of the combined pilot system is investigated, the pollution of MBR and RO membrane and the final treatment cost are evaluated. The results show that the RO permeate qualities are as follows: ρ(COD)≤10 mg/L, ρ(NH~+_4-N)≤2 mg/L, ρ(SS)≤1 mg/L, ρ(TP)≤1 mg/L, and the RO effluent can completely meet the urban recycling water quality standard for industrial uses(GB/T 19923-2005). The MBR membrane pressure is stabilized at 18 kPa, showing no membrane fouling, and the RO membrane permeability coefficient is stabilized at 4 L/(min·MPa), showing both have no severe bio-fouling occurring. During the whole process, the electricity consumption is 1.890 kW·h. The high performance reclaimed water quality has obvious superiority and reduces the operation cost of the enterprise.
In order to reduce the demand of fresh water and ease the pressure about water resources, it is proposed to carry out bid improvement and recycling water reuse of the sewage treatment plant in the park. The combined MBR+RO process pilot system, using flocculation +A~2/O technology as a pre-treatment process, has been set up for the advanced treatment and recovery. The objective of this pilot study is to further investigate the feasibility of MBR system as a pre-treatment process for RO permeation. The treatment performance of the combined pilot system is investigated, the pollution of MBR and RO membrane and the final treatment cost are evaluated. The results show that the RO permeate qualities are as follows: ρ(COD)≤10 mg/L, ρ(NH~+_4-N)≤2 mg/L, ρ(SS)≤1 mg/L, ρ(TP)≤1 mg/L, and the RO effluent can completely meet the urban recycling water quality standard for industrial uses(GB/T 19923-2005). The MBR membrane pressure is stabilized at 18 kPa, showing no membrane fouling, and the RO membrane permeability coefficient is stabilized at 4 L/(min·MPa), showing both have no severe bio-fouling occurring. During the whole process, the electricity consumption is 1.890 kW·h. The high performance reclaimed water quality has obvious superiority and reduces the operation cost of the enterprise.
引文
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[15]夏仙兵,蔡邦肖,缪佳,等.膜工艺在电镀废水处理工程中的应用[J].环境工程学报,2016,10(1):495-502.XIA Xianbing,CAI Bangxiao,MIAO Jia,et al.Application of membrane technology in electroplating wastewater treatment projects[J].Chinese Journal of Environmental Engineering,2016,10(1):495-502.
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[18]杨敏,李亚明,魏源送,等.大型再生水厂不同污水处理工艺的能耗比较与节能途径[J].环境科学,2015,36(6):2203-2209.YANG Min,LI Yaming,WEI Yuansong,et al.Energy consumption and energy saving approaches for different wastewater treatment processes in a large-scale reclaimed water plant[J].Research of Environmental Sciences,2015,36(6):2203-2209.
[19]HAY C T,KHOR S L,DARREN D S,et al.Influence of a prolonged solid relention time environment on nitrification/denitrification and sluge production in a submerged membrace bioreactor[J].Desalination,2009,245:28-43.
[20]吕斯濠,范洪波,曾燕艳,等.厌氧/好氧MBR/物化/厌氧脱色工艺处理酱油废水[J].中国给水排水,2012,28(22):99-101.LYU Sihao,FAN Hongbo,ZENG Yanyan,et al.Anaerobic/aerobic MBR/physicochemical/oxidative decoloration process for treatment of sauce wastewater[J].China Water&Wastewater,2012,28(22):99-101.
[21]郑祥,朱小龙,樊耀波.膜生物反应器处理毛纺废水的中试研究[J].环境科学,2001,22(4):91-94.ZHENG Xiang,ZHU Xiaolong,FAN Yaobo.Treatment of dying wastewater from a woolen mill a pilot-scale anaerobic/oxic membrane bioreactor(A/O MBR)[J].Environmental Science,2001,22(4):91-94.
[2]方静,曾抗美.含盐废水处理研究动态[J].工业水处理,2005,25(2):1-4.FANG Jing,ZENG Kangmei.Development of salt-containing wastewater treatment research[J].Industrial Water Treatment,2005,25(2):1-4.
[3]康群,马文臣,许建民,等.高盐浓度对工业废水生化处理的影响研究[J].环境污染治理技术与设备,2005,6(8):42-45.KANG Qun,MA Wenchen,XU Jianmin,et al.Effcet of hyper-saline concentration on the biochemical treatment of industrial wastewater[J].Techniques and Equipment for Environmental Pollution Control,2005,6(8):42-45.
[4]李再兴,李萍,苗志加,等.高盐度化学制药废水预处理试验研究[J].河北科技大学学报,2010,31(1):52-56.LI Zaixing,LI Ping,MIAO Zhijia,et al.Pretreatment of chemical pharmaceutical wastewater with high salinity[J].Journal of Hebei University of Science and Technology,2010,31(1):52-56.
[5]陈辉,鲁大政,邱晖.MBR工艺处理医药化工废水的中试研究[J].化学工程与装备,2013(6):43-46.CHEN Hui,LU Dazheng,QIU Hui.Analysis on the effect of MBR process for medicine chemical synthesis wastewater treatment[J].Chemical Engineering&Equipment,2013(6):43-46.
[6]骆苏苏,陈春霞,吴耀荣.MBR工艺处理化工废水的试验效果分析[J].科技与创新,2015(14):78-79.LUO Susu,CHEN Chunxia,WU Yaorong.Analysis on the effect of MBR process for chemical wastewater treatment[J].Science and Technology&Innovation,2015(14):78-79.
[7]于凤庆,孙宝盛,陈谊,等.MBR活性污泥培养驯化过程中生物多样性研究[J].环境科学学报,2012,32(9):2084-2090.YU Fengqing,SUN Baosheng,CHEN Yi,et al.Study on biological diversity of the MBR active sludge cultivation process[J].Acta Scientiae Cirumstantiae,2012,32(9):2084-2090.
[8]邱光磊,宋永会,曾萍,等.UASB-MBR组合工艺处理模拟黄连素废水[J].环境科学研究,2010,23(7):942-947.QIU Guanglei,SONG Yonghui,ZENG Ping,et al.Treatment of synthetic berberine wastewater in a hybrid upflow anaerobic sludge blanket reactor(UASB)-membrane bioreactor(MBR)system[J].Research of Environmental Sciences,2010,23(7):942-947.
[9]周玉芬,于淼,杨勇,等.MBR在我国应用现状与市场发展趋势[J].工业水处理,2010,30(7):5-7.ZHOU Yufeng,YU Miao,YANG Yong,et al.Application and market prospect of membrane bioreactors in China[J].Industrial Water Treatment,2010,30(7):5-7.
[10]白玲,蓝伟光,严滨,等.废水处理中膜生物反应器的研究进展[J].膜科学与技术,2008,28(1):91-96.BAI Ling,LAN Weiguang,YAN Bin,et al.Progress of membrane bioreactor in wastewater treatment[J].Membrane Science and Technology,2008,28(1):91-96.
[11]孟建丽,唐运平,张润斌,等.钢铁企业非常规供水水源的深度处理及应用[J].中国给水排水,2010,26(6):85-91.MENG Jianli,TANG Yunping,ZHANG Runbin,et al.Treatment and application of non-conventional water supply sources in large iron and steel enterprise[J].China Water&Wastewater,2010,26(6):85-91.
[12]MA H,ALLEN H E,YIN Y.Characterization of isolated fraction of dissolved organic matter from natural waters and a wastewater effluent[J].Water Res,2001,35:985-996.
[13]ANNA M C,ROBERT C A,DAVID M B.Evaluation of a MBR-RO system to produce high quality reuse water:Microbial control,DBP formation and nitrate[J].Water Res,2005,39:3982-3990.
[14]GWO E M,YU M J,OH H K,et al.Fouling characteristics of NF and RO operated for removal of dissolved matter from groundwater[J].Water Res,2003,37:2989-2997.
[15]夏仙兵,蔡邦肖,缪佳,等.膜工艺在电镀废水处理工程中的应用[J].环境工程学报,2016,10(1):495-502.XIA Xianbing,CAI Bangxiao,MIAO Jia,et al.Application of membrane technology in electroplating wastewater treatment projects[J].Chinese Journal of Environmental Engineering,2016,10(1):495-502.
[16]曹斌,黄霞,ATSUSHI K,等.MBR-RO组合工艺污水回收中试研究[J].环境科学,2008,29(4):915-919.CAO Bin,HUANG Xia,ATSUSHI K,et al.Pilot study on combined MBR-RO process for wasterwater recovery[J].Environmental Science,2008,29(4):915-919.
[17]王琦,樊耀波.膜生物反应器在污水处理与回用中的能耗分析[J].膜科学与技术,2012,32(3):95-103.WANG Qi,FAN Yaobo.Analysis of energy consumption in membrace bioreactors for wastewater treatment and reuse[J].Membrane Science and Technology,2012,32(3):95-103.
[18]杨敏,李亚明,魏源送,等.大型再生水厂不同污水处理工艺的能耗比较与节能途径[J].环境科学,2015,36(6):2203-2209.YANG Min,LI Yaming,WEI Yuansong,et al.Energy consumption and energy saving approaches for different wastewater treatment processes in a large-scale reclaimed water plant[J].Research of Environmental Sciences,2015,36(6):2203-2209.
[19]HAY C T,KHOR S L,DARREN D S,et al.Influence of a prolonged solid relention time environment on nitrification/denitrification and sluge production in a submerged membrace bioreactor[J].Desalination,2009,245:28-43.
[20]吕斯濠,范洪波,曾燕艳,等.厌氧/好氧MBR/物化/厌氧脱色工艺处理酱油废水[J].中国给水排水,2012,28(22):99-101.LYU Sihao,FAN Hongbo,ZENG Yanyan,et al.Anaerobic/aerobic MBR/physicochemical/oxidative decoloration process for treatment of sauce wastewater[J].China Water&Wastewater,2012,28(22):99-101.
[21]郑祥,朱小龙,樊耀波.膜生物反应器处理毛纺废水的中试研究[J].环境科学,2001,22(4):91-94.ZHENG Xiang,ZHU Xiaolong,FAN Yaobo.Treatment of dying wastewater from a woolen mill a pilot-scale anaerobic/oxic membrane bioreactor(A/O MBR)[J].Environmental Science,2001,22(4):91-94.