膜耦合技术对沼液浓缩及净水效果的影响  

Effect of membrane coupling technology on concentration and water purification of biogas slurry

作　　者：李冰 吴迪[1] 石岩 李海翔 李甫 马毅[1] LI Bing;WU Di;SHI Yan;LI Haixiang;LI Fu;MA Yi(The Institute of Agriculture Resources and Environmental Sciences,Tianjin Academy of Agricultural Sciences,Tianjin 300022,China;801 Instituite of Hydrogeology and Engineering Geology,Shandong Provincial Bureau of Geology&Mineral Resource,Ji’nan 250014,China)

机构地区：[1]天津市农业科学院农业资源与环境研究所,天津300022 [2]山东省地质矿产勘查开发局八〇一水文地质工程地质大队,山东济南250014

出　　处：《工业水处理》2024年第5期156-163,共8页Industrial Water Treatment

摘　　要：利用超滤-纳滤膜耦合技术,探究了pH为5~9条件下膜耦合技术对沼液的浓缩效果、净化能力等。结果表明:体积浓缩倍数(VRF)分别为5倍和10倍时,在pH为5~7的条件下,沼液浓缩效果和净水效果均优于碱性条件。当pH为7,VRF为10倍时,浓缩液中总氮(TN)、总磷(TP)、总钾(TK)分别为1 760、435、2 100 mg/L,浓度浓缩倍数分别达到8.8、7.63、6.34倍,盐分去除效果最好,浓缩效果最佳。透过液中NH_(4)^(+)-N、TN、TP、COD的去除率分别达到89.71%、81%、99.82%、95.77%,出水水质达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)二级标准。通过扫描电镜(SEM)和X射线能量仪(EDX)分析可知,膜污染包括有机-无机协同污染,通过酸洗、碱洗能够对膜面污染物的去除起到一定的效果。Ultrafiltration and nanofiltration membrane coupling technology was used to investigate the effects of membrane coupling technology on the concentration effect of biogas slurry and wastewater purification capacity under pH 5-9.The results showed that under the condition of VRF as 5 and 10 times,the concentration and nutrient removal effects under pH of 5-7 were better than those under alkaline condition.With pH of 7 and VRF of 10 times,the concentrations of TN,TP and TK in concentrated liquid were 1 760 mg/L,435 mg/L and 2 100 mg/L,respectively,and the concentration times were 8.8,7.63 and 6.34 times,which showed the best salt removal effect and concentration effect.The removal rates of NH_(4)^(+)-N,TN,TP and COD in the filtrate reached 89.71%,81%,99.82%and 95.77%,respectively.The effluent quality reached the secondary standards of Pollutant Discharge Standards for Urban Sewage Treatment Plants(GB18918—2002).According to the analysis of scanning electron microscope(SEM) and X-ray energy analyzer(EDX),the membrane pollution included organic-inorganic co-pollution.The removal of pollutants on the membrane surface could be partially achieved by acid and alkali washing.

关 键 词：养殖沼液 膜耦合技术 浓缩效果 水质净化 重金属去除 膜污染 

分 类 号：X703.1[环境科学与工程—环境工程]