A Study Of Resin-ultrafiltration Process

At present,global water pollution and human safe drinking water crisis is more and more serious.Firstly,China's drinking water source is polluted seriously,however,treatment efficiency for many pollutants(organics,ammonia)of conventional water treatment processes(coagulation-sedimentation-filtration-disinfection)is poor;secondly,new drinking water standard(GB5749-2006)that a higher quality of drinking water requirements has been implemented;while our drinking water treatment facilities are not advanced,there are plants of 95%are still using conventional water treatment processes.Resin-ultrafiltration process combined adsorption of resin and UF would be a wise choice facing these challenges.This paper,firstly,treatment of Songhua River water was carried through polymeric adsorption resin,anion exchange resin and powered activated carbon,then ultrafiltration experiment for water samples treated was made by ultrafiltration membrane device system,and removal pollution characteristics of resin-ultrafiltration process was obtained.By investigating removal efficiency of DOC and UV254 for resin and PAC,it was shown that removal capacity was anion exchange resin>PAC>polymeric adsorption resin.For HIFI,polymeric adsorption resin made it decrease 30.8%?33.2%,anion exchange resin(D301R and D201)were 38.6%and 46.3%,powered activated carbon was 51.4%.For TFI,polymeric adsorption resin made it decreace 23.9%?32.9%,anion exchange resin(D301R and D201)were 38.1%and 47.2%,powered activated carbon was 40.0%.Then sinked water was treated in the same way as Songhua River water.By investigating removal efficiency of DOC and UV254 for resin and PAC,it was shown that removal capacity was anion exchange resin>PAC>polymeric adsorption resin.For HIFI,polymeric adsorption resin made it decrease 28.0%,23.9%and 3.7%,anion exchange resin(D301R and D201)were 30.6%and 35.6%respectively,and powered activated carbon was 37.1%.For TFI,polymeric adsorption resin made it decreace 26.4%,26.9%and 2.4%;anion exchange resin(D301R and D201)were 12.3%and 17.1%;powered activated carbon was 31.3%compared with Song Hua River.Finally,water of containing extracellular organic matter(EOM)was dealed with in the same way as Songhua River water.By investigating removal efficiency of DOC and UV254 for resin and PAC,it was shown that removal capacity was PAC>anion exchange resin>polymeric adsorption resin For HIFI,polymeric adsorption resin made it decrease 15.8%,11.6%and 8.3%,anion exchange resin(D301R and D201)were 9.9%and 25.4%respectively,and powered activated carbon was 25.3%.For TFI,polymeric adsorption resin made it decreace 13.4%,11.2%and 7.2%;anion exchange resin(D301R and D201)were 9.4%and 13.7%;powered activated carbon was 18.3%.Comparison of resin and PAC on membrane fouling mitigation,we can see that protein substance plays an essential role in membrane fouling,and humus substances plays a minor role in membrane fouling.Macroporous resin has high removal for protein substances,so they have better mitigation effect on membrane fouling.Anion exchange resin has high removal mainly for humus substances,so mitigation effects on membrane fouling is relatively low.