Hollow fiber membrane ultrafiltration of a simulated secondary treatment wastewater. Process and fouling modeling
Abstract
[EN] It is well known that there is a scarcity of drinking and irrigation water around the world nowadays. According to the United Nations, water scarcity affects 1.2 billion people (one-fifth of the world's population) and the water use has been growing at twice the rate of population increase in the last century. This fact makes the reuse of the wastewater from municipal wastewater treatment plants (MWTPs) an interesting option. Ultrafiltration after the secondary settling is becoming more frequently used for wastewater reclamation and it has some advantages compared with conventional processes such as compact design and high quality of the final effluent (including microbiological parameters). However, membrane fouling aspects have to be more deeply studied in view to a more prolonged membrane life. For it, modeling of the process is of crucial importance. Thus, the effect of the operating conditions in the ultrafiltration membrane fouling has been reported by several authors in the bibliography (Wang et alter [1]). In this work, a hollow fiber membrane module has been applied to the ultrafiltration of a simulated secondary effluent from a MWTP. The water quality and the membrane fouling were investigated. This work is focused on the effect of transmembrane pressure and the cross-flow velocity on membrane permeability. In addition, in order to model the ultrafiltration fouling process, permeate flux versus time data has been fitted to a Belfort model.
Full text
Procedia Engineering 44 ( 2012 ) 2079 – 2081 1877-7058 © 2012 Published by Elsevier Ltd. doi: 10.1016/j.proeng.2012.09.051 (XURPHPEUDQH&RQIHUHQFH >3@ +ROORZILEHUPHPEUDQHXOWUDILOWUDWLRQRIDVLPXODWHGVHFRQGDU\WUHDWPHQWZDVWHZDWHU 3URFHVVDQGIRXOLQJPRGHOLQJ -/6ROHU&DEH]DV0&9LQFHQW9HOD-$0HQGR]D5RFD)-0DUWtQH])UDQFLVFR 8QLYHUVLWDW3ROLWqFQLFDGH9DOqQFLD6SDLQ ,QWURGXFWLRQ ,W LV ZHOO NQRZQ WKDW WKHUH LV D VFDUFLW\ RI GULQNLQJ DQG LUULJDWLRQ ZDWHU DURXQG WKH ZRUOG QRZDGD\V$FFRUGLQJWRWKH8QLWHG1DWLRQVZDWHUVFDUFLW\DIIHFWVELOOLRQSHRSOHRQH ILIWK RI WKH ZRUOGV SRSXODWLRQ DQG WKH ZDWHU XVH KDV EHHQ JURZLQJ DW WZLFH WKH UDWH RI SRSXODWLRQLQFUHDVHLQWKHODVWFHQWXU\ 7KLVIDFWPDNHVWKHUHXVHRIWKHZDVWHZDWHUIURPPXQLFLSDOZDVWHZDWHUWUHDWPHQWSODQWV 0:73VDQLQWHUHVWLQJRSWLRQ8OWUDILOWUDWLRQDIWHUWKHVHFRQGDU\VHWWOLQJLVEHFRPLQJPRUH IUHTXHQWO\ XVHG IRU ZDVWHZDWHU UHFODPDWLRQ DQG LW KDV VRPH DGYDQWDJHV FRPSDUHG ZLWK FRQYHQWLRQDO SURFHVVHV VXFK DV FRPSDFW GHVLJQ DQG KLJK TXDOLW\ RI WKH ILQDO HIIOXHQW LQFOXGLQJ PLFURELRORJLFDO SDUDPHWHUV +RZHYHU PHPEUDQH IRXOLQJ DVSHFWV KDYH WR EH PRUH GHHSO\ VWXGLHG LQYLHZ WRD PRUHSURORQJHGPHPEUDQH OLIH )RU LWPRGHOLQJ RIWKH SURFHVV LV RI FUXFLDO LPSRUWDQFH 7KXV WKH HIIHFW RI WKH RSHUDWLQJ FRQGLWLRQV LQ WKH XOWUDILOWUDWLRQPHPEUDQH IRXOLQJ KDV EHHQ UHSRUWHG E\ VHYHUDO DXWKRUV LQWKHELEOLRJUDSK\ :DQJHWDOWHU>@ ,Q WKLV ZRUN D KROORZ ILEHUPHPEUDQH PRGXOH KDV EHHQ DSSOLHG WRWKHXOWUDILOWUDWLRQRID VLPXODWHGVHFRQGDU\HIIOXHQWIURPD0:737KHZDWHUTXDOLW\DQGWKHPHPEUDQHIRXOLQJ ZHUHLQYHVWLJDWHG7KLVZRUNLVIRFXVHGRQWKHHIIHFWRIWUDQVPHPEUDQHSUHVVXUHDQGWKH FURVVIORZYHORFLW\RQPHPEUDQHSHUPHDELOLW\ ,QDGGLWLRQLQRUGHUWRPRGHOWKHXOWUDILOWUDWLRQIRXOLQJSURFHVVSHUPHDWHIOX[YHUVXVWLPH GDWDKDVEHHQILWWHGWRD%HOIRUWPRGHOVHHH[SUHVVLRQEHORZ0DOOXEKRWODDQG%HOIRUW>@ %HOIRUWIOX[GHFOLQHPRGHO 0DWHULDODQGPHWKRGV 7HVWV ZHUH FDUULHG RXW LQ DQ XOWUDILOWUDWLRQ SLORW SODQW XVLQJ V\QWKHWLF ZDWHU WKLV ZDWHU PLPLFV WKH VHFRQGDU\ WUHDWPHQW HIIOXHQW FRPSRVLWLRQ ,Q RUGHU WR SUHSDUH WKLV ZDWHU D SURWHLQ %RYLQH VHUXP DOEXPLQ %6$ DQG D FDUERK\GUDWHSRO\VDFFKDULGH 'H[WUDQ ZHUH DGGHG WR WDS ZDWHU 7KHVH FRPSRXQGV ZHUH VHOHFWHG GXH WR WKH IDFW WKDW SURWHLQV DQG SRO\VDFFKDULGHV KDYH EHHQ UHSRUWHG WR EH WKH NH\ FRPSRQHQWV LQ WKH H[WUDFHOOXODU SRO\PHULFVXEVWDQFHV(36WKDWDUHVROXELOL]HGIURPWKHELRPDVVLQWKHHIIOXHQW6XVDQWR HDOWHU>@ Available online at www.sciencedirect.com
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