环境科学与技术

半程混凝/臭氧化/陶瓷膜过滤新型净水集成工艺

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  • 1.清华大学深圳研究生院 环境工程与管理研究中心,广东 深圳 518055; 2.东莞市东江水务有限公司,广东 东莞 523000; 3.明电舍株式会社,日本 东京 141-8616
范小江(1985-),男,博士生,主要从事膜法饮用水处理研究.

收稿日期: 2013-11-14

  修回日期: 2014-02-25

  网络出版日期: 2014-04-01

基金资助

国家水体污染控制与治理科技重大专项(2008ZX07423, 2009ZX07423-001);广东省水利科技创新项目(2011-27)

Investigation into a New Integrated Water Purification Process of Half Coagulation/Ozonation/Ceramic Membrane Filtration

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  • 1.Research Center for Environmental Engineering and Management,Graduate School at Shenzhen,Tsinghua University,Shenzhen 518055,Guangdong,China; 2.Dongjiang Shuiwu Co.,Ltd.,Dongguan 523000,Guangdong,China;3.Meidensha Corporation,Tokyo 141- 8616,Japan
范小江(1985-),男,博士生,主要从事膜法饮用水处理研究.

Received date: 2013-11-14

  Revised date: 2014-02-25

  Online published: 2014-04-01

Supported by

国家水体污染控制与治理科技重大专项(2008ZX07423, 2009ZX07423-001);广东省水利科技创新项目(2011-27)

摘要

为研究半程混凝/臭氧化/陶瓷膜过滤新型净水集成工艺处理微污染原水时膜污染的控制及该工艺对污染物的去除能力,进行了小试实验,分别改变混凝剂和臭氧的投加量,考察不同工艺条件对跨膜压差及出水水质的影响.结果表明:半程混凝和臭氧可以有效降低膜污染,混凝剂聚合氯化铝(PAC)的投加量为 12.5mg/L 时,跨膜压差由原水直接过膜时的 -0.074MPa 降低至 -0.021MPa,臭氧的投加量从 0 mg/L 增加至 2 mg/L 时,跨膜压差由 -0.068 MPa 降低至 -0.049 MPa;半程混凝/臭氧/陶瓷膜集成工艺对有机物的去除效果显著,工艺出水中有机物分子质量分布范围由原水的小于 5ku 缩小至小于3ku,一部分大分子有机物转化为小分子有机物;该工艺对 COD Mn 和 UV 254 的去除率分别为60.00%和 68.00%,对 THMFP 和 HAAFP 的去除率分别为 57.59% 和 48.39%;集成工艺出水浊度低于 0.05NTU,水中粒径大于 2μm 的颗粒数小于等于 10 CNT/mL,细菌总数和总大肠菌群数为 0,出水的微生物安全得到保障.

本文引用格式

范小江 雷颖 张锡辉 巢猛 野口宽 . 半程混凝/臭氧化/陶瓷膜过滤新型净水集成工艺[J]. 华南理工大学学报(自然科学版), 2014 , 42(5) : 54 -59 . DOI: 10.3969/j.issn.1000-565X.2014.05.009

Abstract

In order to control the membrane fouling caused by the half coagulation/ozonation/ceramic membranefiltration of micro- polluted water and investigate the removal capability of this process for pollutants,a bench- scaletest was carried out,and the effects of coagulant dosage and ozone dosage on trans- membrane pressure and effluentquality were explored. The results show that (1) membrane fouling can be alleviated significantly by half coagula-tion and ozonation,for instance,the trans- membrane pressure decreases rapidly from the original -0.074 MPa to-0.021 MPa at a PAC (Polyaluminum Chloride) dosage of 12.5 mg/L and decreases from - 0.068 MPa to-0.049MPa as the O3 dosage increases from 0mg/L to 2mg/L; (2) the organic matter in water can be removedefficiently by the integrated process; for instance,the molecular mass distribution range of the organic matter chan-ges from less than 5 ku to less than 3 ku,which means a transformation of part of organic matter from large molecu-lar mass to a smaller one; (3) the integrated process helps achieve 60.00% and 68.00% of CODMn and UV254 re-movals as well as 57.59% and 48.39% of THMFP and HAAFP removals,respectively; (4) after the integratedprocess, the effluent turbidity decreases to less than 0.05NTU,the number of particles larger than 2μm decreasesto less than or equal to 10CNT/mL,and the bacteria and coliform groups in water are entirely removed.Thus,themicrobial safety of the effluent is successfully guaranteed.

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