Top chi Khoa hgc 20I2 23b 2~2 2S3 Trv&rtg Dai hgc Cdn Tha XC LY NircrC THAI DET NHUOM B A N G KY THUAT LOG NANO Nguyen Xudn Hodng'''' vd Le Hodng Viet ABSTRACT Nanqfiltration (NFi has become a widely acc[.]
Top chi Khoa hgc 20I2-23b 2~2-2S3 Trv&rtg Dai hgc Cdn Tha XC LY NircrC THAI DET NHUOM B A N G KY THUAT LOG NANO Nguyen Xudn Hodng' vd Le Hodng Viet ABSTRACT Nanqfiltration (NFi has become a widely accepted process not only for producing drinking water but also for recovering wastewater in industrial processes or removing pollutants from industrial M astewater effluent In the textile industry, the treatment of various dye baths with XF at room temperature have already been studied and was found feasible at lab-scale and also pilot scale The aim of this study M'as to investigate the capacity of textile wastewater effluent treatment of two nanqfiltration DS5DL DS5DK in a temperature range from 2(fC to 7(fC for both synthesis dye and real dye bath The performance ofthe \F membranes was evaluated by measuring the water frux salt and colour rejection A membrane damage was observed for the membranes DS5DL at high temperature (>5(fC) and this was elimintaed from the next experiment series The permeate quality of NF membrane DS5DK was satisfactory enough to recycle these effluents in reactive dyeing at elevated temperature (above 5(fC) for water and energy sailings Moreover, the fouling effect at higher temperature (>5(fC) on NF membrane increased the NaiSOj and colour rejection slightly and the platicizing or swelling effect on water flux and retention of salt and color were also observed There was a correlation between the results of experiments with synthetic solution and with real wasteM'ater Keywords: Dye bath, industrial wastewater, nanofiltration, membrane Title: Treatment of dye-baths from textile industry by nano-filtration TOM TAT Ky thugt lgc nano iNF) da duac chdp nhgn rong rdi khong chi sdn xudt nudc udng md eon su dung de xir ly nude ihdi cong nghiip hogc cdc dng dung tai sur dung nudc thdi cho cdc qud trinh cong nghiip Cdc nghien cuu ung dung NF xir ly nirdc thdi cong nghiep del nhugm d nhiit phong dd lien hdnh vd dd chirng to duoc hieu qud ciia no ed a qui mo phdng thi nghiem ha}' trin mo hinh Muc tieu cua nghien cdv ndy tdp trung vdo khd ndng xir ly nuac thdi cong nghiep del nhuom cua hai logi mdng loc Desal DL Desal DK d nhiet tic 20 - 7(fC vai cd hai logi nudc det nhuom d phong thi nghiem vd nirdc thdi thuc ti Hiiu sudt xir ly cua mang lgc duac ddnh gid qua cudng dg loe kha nang logi bo muoi vd mdu Cd su ton thucmg mdng loe xudt hien a NF DS5DL a nhiet cao (>5(fC), vi the mdng loc ndy bj loai bo logt thi nghiim ki dip Chdt luong nudc loc ddm bdo cho tdi sir dung a nhiet tucmg ddi eao C>5(fC) di tiit kiem nude vd ndng lufrng Ngodi anh hudng eua cdn bdm ldm ldng mot it hieu qud loai bo mudi vd mau d nhiet cao (trin 5(fC) ddng thai su gidn nd be mat mdng loc cUng dnh hudng den cuang vd hieu sudi lgc muoi vd mdu Thi nghiem cUng eho lhd\- giua kil qud xir ly cho nudc del a phong thi nghiem va nuac thai thuc ti cd mdi tuang quan vdi Tu khoa: Nude det nhudm, nirdc thdi cdng nghiep, lpc nano, mdng lgc TONG QUAN NF dd va dang dugc ung dung rgng rdi cdc linh vuc iam sacfa nudc udng va cd cdng nghiep xu ly nudc thdi nhu lam mdm nudc loai bd chdt d nhiem hihi Khoa Moi Inrong va Tai ngu\er Thien nhien, Tmong Dai hgc Cm Tho Tap chi Khoa hoc 2012 •23b 272-283 Tru&ng Dgi boc Can Tha ca, cac ion don hda tri va da hda tri, NF ngdy cang cd khd ndng irng dung cho nhieu LTnh vuc cdng nghiep ddc biet la cdng nghiep ddt nhudm dd xu ly vd tai su dung nudc thdi Ky thudt lgc mang cho nudc thai ddt nhudm dd bdt ddu tir thdp nien 1970, vdi cac loai mang sieu Igc (ultrafiltration), mang vi lgc (microfiltration) va tham thdu ngugc Tuy vdy, cdc nghien cuu lgc nano ngdnh chi mdi bat ddu thuc hien tir nhimg ndm 1990, dd loai bd mdt sd ion va cac hgp chdt hiiu ca nudc nhugm Vdi cdc ddc trung sir dung nhidu nudc cilng lugng ldn hda chat nhu bdt gidt, chdt tdy cdn, ddu, sap (hd) vd chdt tdy trdng; vi thd, nudc thai tir cdng nghiep det nhudm ludn chua hda chdt hihi ca, vd ca COD ndng cao va dam mdu ddrig thdi cac cdng doan nhudm, rua sa cap va thu cdp sdn sinh nhidu nudc thdi nhat Do dd, neu cd cdng nghe xir ly nudc dam bao chat Iugng dd tdi su dung chung qui trinh san xudt se mang lai led ich tidt kiem dane kd (Koyuncu e/d/., 2003; 2004) Hon nira, nudc nhudm vd nudc chudi vai thudng cd nhidt dd cao khoang 90°C (Allegre et al., 2006) hodc cao ban; ddng thdi chiia nhidu loai hda chdt ndn khdng thd xu Iy true tidp bang cdc bidn phap sinh hgc Cdc ung dung NF dd xOr ly nudc thai loai d nhidt phdng da dugc chiing minh vdi tinh khd thi cao phdng thi nghidm cung nhu thuc tien (Van der Bruggen et al, 2001a) Nhidu nghidn cuu da cdng bd ket qua img dung NF dd loai bd mudi tang chdt lugng nudc lgc va tiim quan trgng ciia su ddng can vdi thdi gian lgc ngdn (Koyuncu et al., 2002: Van der Bruggen et al., 2001b) dnh hudng cua pH, mudi va nhiet Ien hieu sudt lgc, vd ddnh gia chi phi d nhidt cao (Toshinori et al 2000; Nilsson et al., 2008), cac han chd cua NF vd bien phap dd phdng (Van der Bruggen et ah 2008) Tuy vdy, ket qua nghidn cim NF cho nudc det nhugm d nhiet cao vdn cdn rdt ban chd Cac nha sdn xudt mdng lgc thudng dua thdng sd chiu nhidt Idn nhat ma mang Igc cd thd dp dung dugc; nhidn, chua chdc dd Id cudng chiu nhidt cua mdng Igc dd (Manttari et al., 2002) Do dd, can thiet phdi cd them cac nghien ciiu ve NF dd loai bd mudi, mdu, cdc hgp chdt hihi ca vd vd ca d nhidt dd cao (trdn SO^C), tir dd sd dung lai nudc cho qua trinh san xudt va tiet kiem ndng Iugng dun ndng Thi nghidm nham nghien cuu xem mdng Igc nano cd thd hoat ddng d nhidt cao (trdn SO^C) anh hudng ciia nhidt ldn hidu sudt loai bd mudi, mau vd sir cd tac lgc nhu thd ndo? Muc tieu cudi ciing la ket hgp tiet kiem nudc va nang lugng thu dugc qua nudc xir ly dung dich nhudm dat tieu chudn chdt lugng d nhidt tucmg ddi cao dd tudn hoan lai qua trinh sdn xudt PHAM VI VA PHU^ONG PHAP NGHIEN CUtJ 2.1 Pham vi nghien cihi Nghidn ciru dugc thuc hien phdng thi nghidm vdi hai loai mang loc nano DS5DL, DS5DK Nudc thai la loai dung dich nhugm pha chd d phdng thi nghiem vd cd nudc thai thuc td Thi nghiem dugc thuc hien d nhidt 20 - 70°C ca thidt bi xi lanh (cylinder) vd thidt bi lgc ddng eheo (crossflow) Ap luc Igc dugc cd djnh d dp suat 10 bar Tgp chi Khoa hgc 2012.23b 272-283 Tru&ng Dgi bgc Cdn Tha 2.2 Dac tinb cua vat lieu thi nghiem Mang loc: Cdc mang lgc dimg thi nghidm )a hai loai mang Igc nano polymeric mdng cd tren thi trudng cd kha nang hoat ddng d nhiet cao (bang 1) Bang 1: D|c tinh cua hai lo^i mang loc nano diJng thi nghidm Mdng loc Nhd san xuat Vat lieu Trpng lugng phan td gidi han MWCO (Da) Cudng dd Ipc (Lm""h' bar'^) Nhiet tdi da ("C) L6 rdng (nm) Ap suat toi da (bar) Desal S DK GE Osmonics polyamide 150-300 5.4 90 0.47 15 2-11.5 Desal SDL GE Osmonics polyamide 150-300 9.0 90 ~ 40 2-11.5 Nuac thdi: Cdc thdnh phdn cdu dung dich nhugm dugc pha trdn Idn lugt vdo dung dich nudc nhudm nhdm ddnh gid dnh hudng ciia timg phan mgt each dgc lap Cu thd la chudn bi dtmg dich nudc nhudm dua theo cdng thtic cau tao thuc te; sau dd cdc chdt phu gia va mudi dugc cho thdm vdo dung djch dd t^o cdc nghiem thiic khac Hda chdt su dung dd tao dung djch nhudm axit Id victoria blue (VB: C33H32CIN3 — triarylmethane) va sodium sulphate (dang ket tinh mau trang - Na2S04) (xem Hinh 1) dugc pha che dgc lap hoac kdt hgp Budc tiep theo, nudc nhudm thuc td dugc sir dung dd kidm tra kdt qua ciia thi nghidm vdi dung dich nhudm pha chd d giai doan Na*^"Na* J o=s=o o- ' ^ '*^=^ ^ Sodium sulfate Victoria blue CSSH^^CINB (triarylmethan) Hinh 1: Cau true hoa hpc cua cac chat dung pha chi dung dich nhu^m Nham kiem tra khd nang boat dgng ciia mang Igc d nhidt cao, loat thi nghiem dau tidn dugc thuc liien ldn lugt cho timg mang Igc vdi nudc edt vd dung dich mudi vd ca (10 g/L Na2S04) va mau (50 mg/L VB) - hihi ca - ca thiet bi xi lanh vd thiet bi lgc ddng eheo Cac thi nghidm dugc tidn hanh cho tiing nghidm thurc theo cung mgt qui trinh Ke tidp, la loat thi nghidm vdi dung dich hihi ca ndng dg cao g/L vd dung dich hdn hgp phdi trgn tir hai cdp ndng VB trdn vdi muoi ndng dd 10 g/L va cd nudc thai thuc td (tir cong ty ddt DESSO) d nghidm thiic sau Cling Thdng sd chi tidt dugc ghi bdng Bang 2: Cac nghiem thirc va nong d6 cac chat moi thi nghifm Nghiem thirc Nong dp cac chdt phan Lpc xl laoh Lpc d6ng ch^o FI(NC) Nudc cat F2(M) Dung dich mudi 10 g/L NaCI F3a(VB) Dung dich nhudm, 50 mg/L VB F3b(VB) Dung dich nhuom, 3.0 g/L VB F4a(M+VB) ID g/L NaCI va 50 mg/L VB F4b(M+VB) 10 g/L NaCL va 3.0 g/L VB F5(NT) Nudc thai thirc tg* • mdu niroc ihai tir nhd mdy del DESSO (Bi) Tcp chi Khoa hgc 2012 23b 2'2-283 Tru&ng Dgi hgc Cdn Tha Phtnmg pfaap thi nghiem 2.3.1 Quy trinh thi nghiein O giai doan ddu, mang lgc dugc kiem tra qua thiet hi lgc xi lanh (LXL) cd khudy tir (Sterlitech^^ HP4750 stirred cell) Idn lugt vdi nudc cat, dimg dich mudi va dung dich nhudm Mang lgc (didn tich 12.56 cm^) dugc chen vao day xi lanh va dugc giii chat bdi dia thdp dem cd Id rong va khudn day Dung dich cdn lgc dugc vao than ciia xi lanh (cao 22.4 cm, the tich 300 ml) cd lap ddt canfa khudy tir khuay lien tuc nham trdnh can bam tren bd mat mang Igc Ap sudt lgc cd dinh d 10 bar, nhiet cd the didu chinh tdng moi 10°C tir 20 - 70°C The tich nudc lgc ddu dugc bang dng thiiy tinh Cac thi nghiem tuang tu dugc thuc hien vdi thiet bi Igc ddng eheo (LDC) Amafilter Test Rig PSSITZ d cimg didu kien dp sudt, nhidt (Hinh 2) Trong thi nghidm ndy cd hai ddng tham qua (permeate) \ a ddng giiJ lai (retentate) dugc tudn hodn ddn mgt thung chiia 10 lit nham giit cho ndng cdc chdt dn dinh va han che thd tich nudc nap can thiet (Schaep, 1999; Van der Bruggen et al., 2001a) Dung dicfa nap (5) dugc bom vdo mang lgc bdng mdt bom ba cdp (6) Qud trinh lgc xd;' bd pfadn bdng tfaep khdng ri chju dp ggi Id budng Igc (TZA 944) dang ddng eheo (2) Mang lgc dugc cfauan bi sdn (dudng kinh 0.09 m, didn ticfa 0.004 m^) dugc dat vao dta vd khudn ciia budng lgc (2) Rdnh chir nhdt dudi day khudn cd dudng kinh thuy luc Id 4.2 mm vd chidu ddi 293 cm Nfaiet kiem sodt bdng bd dieu khidn tu dgng (OMRON E5AJ) Ddng thdm qua (3) dugc tfau gom vd bang ong thuy tinfa cd chia vach: chung cd the dugc tudn faoan ve thimg chua faodc tfadi bd theo thiet ke 1: van nap 2: budng Ipc 3: ddng tham qua 4: dong giu' lai S: thiing chiia 6: bom Hinh 2: Sa dd dong qua trinb loc nano bdng tbiet bi Ipc dong eheo 2.3.2 Ky thugt phdn tich Mdu cua mlu nudc dugc phdn tich bdng thiet bi quang pfad Sfaimadzu UV-210A Hidu sudt ciia mang lgc nano dugc ddnh gia qua vide sir tdc mdng lgc vdi cudng ddng thdm qua khd nang loai bd mudi vd mdu K E T QUA VA T H A O LL AN 3.1 Sy phu thugc ciia cuong dp lpc vao nhiet dd va thdi gian Khd ndng thich img cua mdng loc a nhiet cao Tgp chi Kboa hoc 2"i: :3b 2"2-2S3 Tnr&ng Dgi hgc Cdn Tha h-HifusuilloiiboDi Hinh 3: C u * n g 6d lpc (a) v i hieu suat Ipc (b) LXL Qua kdt qua tfai nghiem kidm tra ban dau vd khd ndng thich iing ciia mang Igc d nhidt cao vdi cac ngfaiem tfadc F1 F2 vd F3a (chi thuc hien LXL) su khac giiJa cudng dd Igc vafaidusudt lgc dugc trinfa bdy hinfa ddi vdi LXL vd hinfa ddi vdi LDC Hinh 4: Circmg loc (a) va hieu suat lpc (b) LDC Doi vdi cudng dd lgc, cac gia tri cudng lgc vdi dung dich mudi vd mdu thi ngfaiem LXL (Hinh 3a) tdng nhidt tdng; didu cung nhdn thay rd d thi nghiem LDC (Hinh 4a) ddi vdi dung dich mudi Cdc gid tri cudng Igc ddu cd xu hudng tdng dan kfai nhiet tang; Tuy nhidn, cdc gid tri cudng lgc cua dung djch muoi d LDC ldn hem d LXL, cd thd la cdng suat d LDC Idn han Quan sat cudng lgc d nhiet cao thi nghidm LXL, ta thdy cd su xuat hien cdc gid tri khdng dn dinfa d nfaiet dd cao (60 vd 70''C) ddi vdi nghidm thiic F3a d mdng lgc DS5DL - dudng net diit (Hinh 3a) Cdc gid tri cudng lgc tang dan d ddi nhidt dg tir 20 ddn 50°C cd hai ngfaiem thiic vdi dung dicfa mudi (F2) va mau (F3a), den nhiet cao 60 - 10°C, thi cd su tdng dot bidn cdc gia tri cudng Igc ddi vdi nghidm thiic vdi dung dicfa mudi F2 Cdc gid tri tdng bat tfaudng cho thay kha ndng cho nudc qua mdng lgc nhieu han so vdi xu hudng tdng ciia chung, rdt cd thd cd xudt hien su ton thuang mang lgc lam vide d nhiet cao Xet den anhfaudngciia nhiet dd Idn hidu sudt lgc, ta tfady xu hudng gidm ciia hidu xuat lgc kfai nhiet tdng ddi vdi ca hai mang lgc Tuy nhidn, mdt sd gid tri tang, giam bat thudng cung xudtfaiend nhiet cao 60 - 70''C Tren hinh 3b, hidu sudt Igc mudi ciia DS5DL dang xu hudng giam nhanh tir 55-22% nhidt tdng tir 20 - 40°C, chung bdt ngd ddi hudng tdng d SO^C (23%) va d 60°C (29%) vd lai Tr^ chi Khoa hpc 2012 23b ~2-2S3 Trtr&ng Dgi hgc Cdn Tba gidm thdp a TO^C (17%) Ci LDC (hinh 4b) hieu suat lgc mudi giam rdt it tir 6157% nhiet tang tir 20 - 40°C chung giam d SO^C (42%) nhung lai tdng nggt d 60"C (74%) vd gidm thdp d 70°C (41%) Ngugc lai vdi LXL (Hinh 3b), hidu sudt lgc mau giam rdt it tir 99 - 96,5% tir 20-50 °C; nhung chiing dot nggt giam ddn 76% (d 60°C) vd tdng ldn 85% (d 70°C) Su tdng cudng lgc ddi vdi dung dich mau cung vdi hidu suat lgc mau gidm d nhiet cao 60 — 70°C chi cd tfae giai tfaich bang sir tdn tfauong mang Igc dd nd cfao pfaep cuong Igc qua nhieu hon va Iam giam hieu sudt Igc Nhung ddi vdi cac gia tri bdt tfaudng tfai nghidm vdi dung dicfa mudi thi rdt khd giai tfaiefa Nfain cfaimg, cdc gia tri cudng Igc va hieu sudt lgc cua DS5DL ddu khdng dn dinfa d nhidt cao han 50°C, tir dd cd the kfaang dinh rdng mdng lgc khdng thich hgp cho hoat ddng d nhidt cao so vdi muc tidu dd dua; dd, mdng DS5DL bi loai bd cac tfai ngfaiem tidp theo Qua dd, ta cd the khdng dinfa rang cac thdng tin dugc cung cap bdi nha sdn xudt cfaua chdc chan hoan todn diing va cdn dugc kilm chiing trudc sii dung Suphu thuoc vdo th&i gian Bang ; P h a n t r a m sut giam dong t h a m cua DS5DK tbiet bj loc dong eheo Mang loc ^ D Vi D Nghiem thvc T gian Sir sut giam dong tham (%) theo (phul) 20 30 40 50 F2=Mu6i 10 g/L 15/30 0.00 0.00 0.00 1.99 30/50 0.25 00 0.00 5.07 F3a= 50mg/L VB 15/30 0.54 6.02 0.93 0.00 30/50 0.84 2.91 0.77 0.00 F3b=3.0g/LVB 15/30 1.83 2.01 4.55 4.71 30/50 0.57 0.00 6.26 5.81 2.87 3.73 4.98 4.62 F4a= F2 + F3a 15/30 30/50 7.22 5.98 7.83 4.79 15/30 4.75 3.18 2.85 0.79 F4b= F2 + F3b 5.18 2.28 0.26 30/50 5.51 nhiet (°C) 60 70 1.68 5.48 2.26 3.24 0.00 0.00 0.00 0.00 2.74 3.79 5.81 2.36 4.52 3.45 5.48 1.78 4.68 4.51 5.38 3.56 15'30 Sir siJl gidm dong ihdm ophul 30 so \'di phiit 30 50- Sir sut giant dong thdm a phut 50 so vdi phut 30 Cung vdi thi nghidm tren tfadi gian dd cudng lgc dat trang thai dn dinfa dugc theo ddi vd xdc dinfa sau 10 pfaiit van faanh fad thdng Sd lieu tinh toan bang cho thay miic su sut giam ddng thdm thiet bi lgc ddng eheo tuong ung vdi ket qua quan sat lgc xi lanfa Ddi vdi mang lgc DS5DK cudng lgc dn dinfa khoang nhiet tir 20 ddn 40''C O nhiet cao han SO^C s^ sut giam ddng thdm xay ra, nhung anh faudng khdng ldn chi chidm khoang vai phan trdm Tir bdng sd lieu na\' cho tfady sir sut giam cudng ddng tfadm theo thdi gian khdng ddng kd tdt cd cdc nghidm tfaiic ('dn cua chat ldng dd lam giam ddng thdm qua mdng nano O nghidm thiic vdi hdn hgp chat hihi co \ a vd co F4a va F4b dudng cong bidu didn cudng Igc gdn trung Tir dd cho thdy su hien didn cua mudi lam giam anh hudng ciia su hap phu chdt him ca ldn bd mat mdng Igc va ldm tang cudng lgc Nhin chung cac gid tri cudng lgc giam dan tang ndng chdt hihi co \a xudt faien sy sut gidm ha\ su\' gidm cudng Igc nhung chua xa> sy tdc lgc 3 Hieu suat loc muoi va mau (thuoc nhuom) Hieu sudt loai bd mudi va mau la mgt ydu td quan trgng ciia \idc xu ly dung dich nhugm Bidu dd hidu sudt lgc mudi (Na2S04) vd mdu (VB) cfao mang lgc DS5DK dugc bidu thi trona hinh vdi cac nahidm thiic chiia mudi, man hodc ca faai Tgp chi Khoa hoc 2012 23b 2~2-283 Tnr&ng Dgi hgc Cdn Tha il lift miu t i u minE BMBO LDC Hinh 6: Hieu suat Ipc muoi va mau ciia m a n g Ipc DSSDK Hieu sudt loc muoi Trdn fainfa 6a dudng cong hidu sudt lgc mudi nghidm thiic F2 (10 g/L Na2S04) gidm nfaiet dd tdng, didu dd mdt lan nGa kfaang dinh gfai nfaan ciia Niisson et al (2006) rdng hieu sudt Igc mudi phu thudc vdo nhidt d^- Nd cd the dugc gidi thiefa bdi sy mdm hda (gidn nd) mang Igc d nhiet cao lam tdng ddng tfadm ddn ddnfaidusudt lgc mudi giam Khi cd sy hidn didn cua mudi dung dich nhugm, F4a vd F4b dudng cong bieu didn hidu sudt Igc rdt khdc nfaidt dd nfad hon 45''C, ndng VB thdp (50 mg/L) thi hieu suat Igc mudi thap, ndng VB cao (3 g/L) thi hidu suat Igc mudi cao hon; cdn d nhidt cao faan 45°C thi faoan toan ngugc lai Qua dd ta thdy, cd sy hien didn cua thudc nfaudm (VB) thi faidu sudt lgc muoi giam Hieu sudt Igc mudi tang nhiet tang (< 45°C) dd la cac phdn tir hOn co bam vao be mat ciia mang lgc lam giam kich thudc cua lo rong Su anh hudng gian nd mdng Igc cung xay ddng thdi, nhung d nhidt ndy, thi su hiit bam ciia chdt hihi ca manh hon ndn kich thudc cua Id rdng suy giam ldn han vd vi the lam tdng hidu sudt lgc mudi CS nhiet cao (>50°C), sy gian nd bidn dang hinfa thai Idn ban nen Iam cho khd ndng tham cao hon; dd lam gidm hieu suat loai bd mudi Didu ndy dd dang nhdn bidt d nghiem thiic cd ndng VB cao (3g/L) Nhu vdy cd tfad ket ludn rdng cd su hien didn ciia tfaudc nfaudm thi hidu sudt lgc mudi giam, didu dd trdi ngugc vdi kdt ludn cdng bd bdi nghidn ciiu cua Jiraratananon et al (2000) rang hidu sudt lgc mudi tdng kfai cd su hidn dien cua thudc nhudm Hieu sudt loc mdu Theo bieu ddfainfa6b ta thdy, hidu sudt lgc mau cao nfadt (>98%) d nhidt 20 30"C sau dd gidm dan nhiet tang Khi cfai cd thudc nhugm dung dich, cd hai ngfaiem tfaiic F3a va F3b, faidu sudt loai bd mau khdng khdc nhidu va ldn hon 97% Vdi dung dich cd ndng VB cao (3g/L), faidu sudt loai bd mdu idn hon Didu cd tfad giai tfaich bang sy hut bdm chdt hihi co len bd mat ciia mang lgc lam cho lo rdng cua mang hep va kfaa nang tfadm gidm va vi thd hidu sudt loai bd mdu tdng nghiem thiic F4a va F4b, cd sy hidn dien cua mudi dung dich sy cdng hudng ciia dp sudt tham thdu va phan cyc ciia dung dicfa Iam cho cudng dd Igc suy giam (Jiraratananon et al, 2000) vd vi thd ldm tdng hidu sudt lgc mau d nhidt thdp 20 - 40°C nfaidt cao hon sy gian nd ciia cdu triic mang lgc nhu dd thdo luan ciing vdi su cdng hudng dnh hudng ciia mudi dung dich se lam tdng cudng lgc dang kd vd vi tfad lam giam faidu suat lgc mdu Tru&ng Dgi bgc Can Tha Tap chi Khoa hgc 2012 23b 272-283 3.4 Tfai nghiem vdi nird-c thai thyc t^ Ddi vdi nude thai tfayc te, cudng dd lgc vd hidu sudt lgc mdu vd mudi dugc gfai nhan, tinfa todn vd trinh bay bidu dd hinh I Cirang dS Igc hi^u chmh ^ M irdcth^i 2M fa.KifusuJtl9Cini£iviiDiu,LDC F.,»l», p^ O t o -*-Dcs»liDKFI(VO •% 150 -^^ ' • Dsil DK-nniL 0 30 M 50 Nhi^tdikCC) 20 it 40 SO 60 TO Nhifl djf Hinh 7: Cuong dp va hi^u suat lpc ctia mang DSSDK vol niroc thai thirc te Ci hinh 7a ta thdy cudng Igc cua mang DS5DK vdi nudc thdi thuc td thap faon cua nudc edt; gid tri Idn lugt la 32 L/m^h (20''C) va 90 L/m^fa (70°C) ddi vdi nudc thai tfayc td vd 55 L/m^h (20 °C) vd 135 L/m^h (70''C) ddi vdi nudc edt Gid tri tuong irng vdi dot sut giam ddng thdm 42% d 20'*C vd 34% d 70°C Them vdo dd, ddc tuang ddi ciia cudng lgc ddi vdi nudc thai la 1.34, tfadp hon gia tri ddi vdi nudc cat la 1.6 cho tfady rdng cd anfa hudng cua nfaiet len su tac dan mang lgc, nhidt cdng cao, anh hudng ndy cdng ldn Do ta cd thd kdt ludn rdng, cudng lgc giam su tdc nghdn ddn mang lgc vd sy dnfa hudng cua nfaiet gidm la yeu td ndy Hiiu sudt logi bo muoi Tir bidu dd fainh 7b, hieu sudt lgc mudi cua DSSDK giam ddn nhidt dg tang; hieu sudt loai bd mudi khodng 60% o ^ va giam cdn 50% d 70°C Didu ndy mgt Idn niJa khdng dinh rdng hieu sudt lgc muoi pfau thudc vdo nhidt Do hidu sudt lgc mudi thdp khoang hon 50%, gid trj ndy ciing tuang iing vdi hieu sudt lgc bd mudi ddi vdi dung dicfa hdn hgp mudi va mau pha chd d pfadng thi ngfaiem (dao ddng tir 40% - 80%) Hieu sudt logi bo mdu Hieu sudt Igc mau ciia mang lgc nano Id mdt nhdn td quan cua nghidn ciiu Trdn hinfa 7b, faidu sudt lgc mau Idn hon 93% va tuong ddi dn djnh vd khdng phu thudc vao nhidt Vdi hidu sudt lgc tuong doi cao ndy hoan todn cd thd tudn hoan nudc cho muc dich tai sir dung d nhiet dd cao (den 70''C) Vdi ket qua thu dugc ta thdy mang Igc nano DS5DK it chiu anh hudng cua sy tdc ddn mdng lgc thdi gian nghidn ciiu Hidu sudt lgc mudi tuong ddi thdp, hidu sudt lgc mdu rdt cao se la mdt thudn lgi Idn vide tai su dung nudc thai xir iy d nfaidt cao (ddn 70°C) thdng qua vide ^iam nguy co tdc lgc va trdnh riia cot Igc lidn tuc, tidt kidm dugc mgt lugng mudi ddng thdi tidt kidm ndng lucmg dun ndng nudc ddng kd Tuy nhidn chat lugng nudc cdn dugc kiem tra va kiem sodt trudc dua iing dung vao thyc td Ti^ chl Khoa hoc 2012.23b 72-283 Tnt&ng Dai hgc Ciin Tha K £ T LUAN VA KIEN NGHI 4.1 KET LUAN Qua thi nghidm lgc nano vdi dung dicfa nhudm d phdng thi nghidm vd vdi nudc thai tfauc te cfaung ta gfai nhan mdt sd kdt ludn nhu sau: Cudng Igc tang nhidt tang (hodc nhdt giam) tfaeo dinfa ludt HagenPoiseuille; nfaung dnh faudng cua nfaidt tfaap han dnh hudng ciia cdc chdt hda tan dung dich Khi ndng chdt huu co (VB) cao tfai cd hidn tugng suy gidm cudng Igc, nhung d mdt chung muc nao dd lai lam tang hieu qud loai bd mdu Ngoai sy anh hudng ciia nhiet len cudng dd vd faieu suat lgc su gian nd hay truang phdng mang Igc nano cho phep chat Idng thdm qua mang lgc nhieu faon kdt qua lam giam hieu sudt lgc mudi vd mdu Hon niia su hidn didn cua muoi NaCl dung djch ciing lam tang cudng lgc vd lam suy gidm faidu sudt lgc cua mdng Cd su hdp phu chat huu co (VB) Idn bd mat mdng Igc lam can trd sir di cfauydn cua cfaat ldng hay ldm gidm ddng thdm qua mang nano nhung chua xdy hidn tugng tdc Igc, ddc bidt la ddi vdi dung dich cd ndng chdt hihi ca cao Mang lgc nano DS5DL bi tdn tfauong vd khdng thich hgp lam vide vdi nhidt cao (>50°C) Vi thd cdn kidm tra lai cac thdng sd ky thudt cung cap bdi nfad sdn xuat Nudc thdi thuc te cho faidu sudt loai bd mdu cao va faieu sudt loai bd mudi thdp se la uu thd cho muc dicfa tdi sii dung nudc chiia mudi va tiet kidm ddng kd nang lugng (tai su dyng nudc d 60-70''C) Tuy nhien cung cdn kidm tra kJ chdt lugng ciia nudc xii ly theo ydu cdu cu the cua ddy chuyen san xudt 4.2 KIEN NGHI Didm bat lgi ldn nhdt ciia iing dung lgc nano la anfa faudng ciia sy bidn dang deo mdng lgc vd sy tdc lgc ndu tfadi gian van faanh dai Do dd, cdn cd ngfaidn cuu dnh hudng cua thdi gian van hanfa ldn qud trinh tdc lgc va su bidn dang mang lgc Hdn hgp nudc ddt nhudm khac nfaau se cd nhdt khac nfaau, vi vay cung cdn cd nghien cihi anfa hudng cua nfadt timg loai dung dich Igc ldn hieu sudt loai bd mudi vd mau TAI LIEU THAM KHAO Allegre, C , Molulin, P., Maisseu, M., and Charrbit, P., 2006 Treatment and reuse of reactive dying effluents J Membr Sci 269:15 Duthie X S Kentish, C Powell, K Nagai, G Qiao and G Stevens 2007 Operating temperature effects on the plasticization of polyimide gas separation membranes J Membr Sci 294,40-49 Jiraratananon R., A Sungpet P Luangsowan, 2000 Performance evaluation of N F membranes for treatment ofeffluents containing reactive dye and salt Desalination 130 177-183 Koyuncu 2003 Influence of dyes, salts and auxiliary chemicals on nanofiltration of reactive dye baths: experimental observations and model verification, Desalination 154 (1) 79-88 Tap chi Khoa bgc 2012:23b 272-283 Tnr&ng Dgi hgc Cdn Tha Koyuncu I., D Topacik, and E YukseL 2004 Reuse of reactive dyehouse wastewater by NF: process water quality and economical implications, Separ Purif Technol., 36: 77-78 Koyuncu I., D.Topacik, 2002 Effect of organic ion on the separation of salts by nanofiltration membranes J Membr Sci., ]95((1)): p 247-263 Manttari M., A Pihlajamaki, A Kaipainen, M Nystrom, 2002 Effect of temp, and membrane pre-trealment by pressure on the filtration properties ofNF membranes Desalination 145, 81-86 Mulder M., 1997 Basic principles of membrane technology 2"^ ed Kluwer Academic Publishers Nilsson M , F LipnizJti, G Tragardh and K Ostergren, 2008a Performance, energy and cost evaluation o f a N F plant operated at elevated temperatures J Membr Sci., 60: p.36-45 Nilsson M Gun Tragardh, and Karin Ostergren 2008b The influence of pH, sah and temperature on nanofiltration performance J Membr Sci., 312: p 97-106 Schaep J., 1999 Nanofiltration for the removal of ionic components from water PhD thesis Katholieke Universiteit Leuven, Heverlee, Belgium Schafer, A.I., Fane, A.G Waite, T.D., 1998 Nanofiltration of Natural Organic Matter: Removal, Fouling and the Influence of Multivalent Ions, Desalination 118, 109-122 Sharma R R , Rachana Agrawal, Shankararaman CheUam, 2003 "Temperature effects on sieving characteristics of thin-film composite nanofiltration membranes pore size distributions and transport parameters" J Membr S c i , 223, 69—87 Toshinori T., S Izumi, T Yoshioka and M Asaeda, 2000 Temperature effect on transport perfonnance by inorganic nanofiltration membranes Joumal of AlChE 46 (3): p 565-574 Van der Bmggen B., Daems B., Vandecasteele C , 2001a Mechanisms of retention and flux decline for the N F of dye baths from the textile industry Separ Purif Technol., 22-23, 519-528 Van der Bruggen B., Daems B., Vandecasteele C , 2001b Water reclamation in the textile industry: N F of dye bath for wool dyeing Ind Engineering Chemistry Resource 40( 18)' p 3973-3978 Van der Bruggen B Bracken L., Vandecasteele C , 2002 Flux decline in nanofiltration due to adsorption of organic compounds Separalion and purification technology 29(1) 23-31 Van der Braggen B., Manttari M., Nystrom M., 2008 Drawbacks of applying nanofiltration and How to avoid them: A review Separ Purif Technol, 63, 251-263 Weast R C , 1982 CRC Handbook of Chemistry and Physics CRC Press Inc., 62"'' ed ... dimg thi nghidm )a hai loai mang Igc nano polymeric mdng cd tren thi trudng cd kha nang hoat ddng d nhiet cao (bang 1) Bang 1: D|c tinh cua hai lo^i mang loc nano diJng thi nghidm Mdng loc Nhd... dong qua trinb loc nano bdng tbiet bi Ipc dong eheo 2.3.2 Ky thugt phdn tich Mdu cua mlu nudc dugc phdn tich bdng thiet bi quang pfad Sfaimadzu UV-210A Hidu sudt ciia mang lgc nano dugc ddnh gia... cfaat ldng hay ldm gidm ddng thdm qua mang nano nhung chua xdy hidn tugng tdc Igc, ddc bidt la ddi vdi dung dich cd ndng chdt hihi ca cao Mang lgc nano DS5DL bi tdn tfauong vd khdng thich hgp