微絮凝-金属膜过滤工艺处理微污染水源水
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摘要
采用微絮凝-金属膜过滤组合工艺,以模拟的微污染水源水为处理对象,研究组合工艺对水中污染物的去除效果。混凝剂聚合氯化铝(PACl)投加量为25 mg/L,选用0.1μm和0.3μm孔径的金属膜滤芯,膜通量为700L/(m~2·h)。结果表明,微絮凝-金属膜过滤工艺中0.1μm和0.3μm金属膜对浑浊度的去除率分别为98.0%和97.3%,对COD_(Mn)的去除率分别为73.6%和63.7%;一个运行周期中金属膜跨膜压差由0 MPa增加到0.25 MPa;FT-IR检测结果表明膜表面形成的滤饼层中含有亲水性基团;接触角由初始83.1°降低到过滤后5.4°,膜表面亲水性增强。
Micro-polluted Water Treatment of micro-coagulation filtration using metallic membranes was investigated. The coagulant was poly-aluminum chloride(PACl) and the dosage was 25 mg/L, pore sizes of metallic filters were 0.1 μm and 0.3 μm, membrane filtration kept 700 L/(m~2·h) at constant flux. The results showed that the removal of turbidity was 98.0% by micro-coagulation filtration with 0.1 μm metallic membrane and 97.3% with 0.3 μm,the removal of COD_(Mn) was 73.6% and 63.7% respectively; transmembrane pressure(TMP) of metallic membranes rose from 0 MPa to 0.25 MPa during a running cycle; hydrophilic groups were found in cake layer on the membrane surface using FT-IR; the contact angle of membrane surfaces was 83.1°initially and decreased to 5.4° which indicated that hydrophilicity of membrane was promoted.
Micro-polluted Water Treatment of micro-coagulation filtration using metallic membranes was investigated. The coagulant was poly-aluminum chloride(PACl) and the dosage was 25 mg/L, pore sizes of metallic filters were 0.1 μm and 0.3 μm, membrane filtration kept 700 L/(m~2·h) at constant flux. The results showed that the removal of turbidity was 98.0% by micro-coagulation filtration with 0.1 μm metallic membrane and 97.3% with 0.3 μm,the removal of COD_(Mn) was 73.6% and 63.7% respectively; transmembrane pressure(TMP) of metallic membranes rose from 0 MPa to 0.25 MPa during a running cycle; hydrophilic groups were found in cake layer on the membrane surface using FT-IR; the contact angle of membrane surfaces was 83.1°initially and decreased to 5.4° which indicated that hydrophilicity of membrane was promoted.
引文
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[16]Jiao R,Xu H,Xu W,et al.Influence of coagulation mechanisms on the residual aluminum-The roles of coagulant species and MW of organic matter[J].Journal of Hazardous Materials,2015,290:16-25.
[17]Koo C H,Mohammad A W,Suja'F.Effect of cross-flow velocity on membrane filtration performance in relation to membrane properties[J].Desalination and Water Treatment,2015,55(3):678-692.
[18]Gryta M.Study of Na Cl permeability through a non-porous polypropylene film[J].Journal of Membrane Science,2016,504:66-74.
[2]Ghouil B,Harabi A,Bouzerara F,et al.Elaboration and characterization of ceramic membrane supports from raw materials used in microfiltration[J].Desalination and Water Treatment,2016,57(12):5241-5245.
[3]Cusido J A,Cremades L V,Sitjar R.Ceramic macromembrane for tangento-axial micro-and ultrafiltration water systems[J].Desalination and Water Treatment,2016,57(6):2737-2742.
[4]Neuman P,Rohlig R,Kohstoss A.Metallic Membranes[J].Filtration&Separation,1998,35(1):40-42.
[5]Xing Y,Baumann S,Uhlenbruck S,et al.Development of a metallic/ceramic composite for the deposition of thin-film oxygentransport membrane[J].Journal of the European Ceramic Society,2013,33(2):287-296.
[6]Wang Y,Suh J,Lee Y,et al.Direct measurement of hydrogen diffusivity through Pd-coated Ni-based amorphous metallic membranes[J].Journal of Membrane Science,2013,436:195-201.
[7]Aalami-Aleagha M E,Madaeni S S,Daraei P A.New application of thermal spray in preparation of metallic membrane for concentration of glucose solution[J].Journal of Thermal Spray Technology,2009,18(4):519-524.
[8]Kim R,Lee S,Kim J.Application of a metal membrane for rainwater utilization:filtration characteristics and membrane fouling[J].Desalination,2005,177(1-3):121-132.
[9]Zhang S,Yang F,Liu Y,et al.Performance of a metallic membrane bioreactor treating simulated distillery wastewater at temperatures of 30 to 45℃[J].Desalination,2006,194(1-3):146-155.
[10]李伟英,汤浅晶,李富生,等.金属过滤膜去除微粒子的研究[J].中国给水排水,2004,20(10):1-5.
[11]胡海修,胡蓉,胡连超,等.金属膜陶瓷膜净水技术试验研究[J].后勤工程学院学报,2006(03):57-60.
[12]Phelps T J,Palumbo A V,Bischoff B L,et al.Micron-pore-sized metallic filter tube membranes for filtration of particulates and water purification[J].Journal of Microbiological Methods,2008,74(1):10-16.
[13]Leiknes T,准degaard H,Myklebust H.Removal of natural organic matter(NOM)in drinking water treatment by coagulationmicrofiltration using metal membranes[J].Journal of Membrane Science,2004,242(1-2):47-55.
[14]Zhao S,Gao B,Yue Q,et al.Evaluation of floc properties and membrane fouling in coagulation-ultrafiltration system:The role of enteromorpha polysaccharides[J].Desalination,2015,367:126-133.
[15]杨忠莲,高宝玉.水体中残余铝的含量、组分、危害及控制研究进展[J].精细化工,2013(04):412-419.
[16]Jiao R,Xu H,Xu W,et al.Influence of coagulation mechanisms on the residual aluminum-The roles of coagulant species and MW of organic matter[J].Journal of Hazardous Materials,2015,290:16-25.
[17]Koo C H,Mohammad A W,Suja'F.Effect of cross-flow velocity on membrane filtration performance in relation to membrane properties[J].Desalination and Water Treatment,2015,55(3):678-692.
[18]Gryta M.Study of Na Cl permeability through a non-porous polypropylene film[J].Journal of Membrane Science,2016,504:66-74.