Nghien cu''''u & Trao do! VE MOT CONG NGHE XCf LY 6 NHIEM N G U 6 N NU''''DC CAC DONG KENH RACH BANG HE BOT KICH HOAT VI SINH TS Ngo Ngoc Thach Vipn Sinh thdi Mdi trudng ong bdi bdo ndy chung tdi gidi thieu[.]
Nghien cu'u & Trao do! VE MOT CONG NGHE XCf LY NHIEM N G U N NU'DC CAC DONG KENH RACH BANG HE BOT KICH HOAT VI SINH TS Ngo Ngoc Thach Vipn Sinh thdi Mdi trudng ong bdi bdo ndy chung tdi gidi thieu mgt he bdt kich hoat vi sinh duoc sdn xuit tren giay K)r chuyin cdng nghe cao vdi ngudn nguydn lieu Id bdt than dd tu nhien di xuly cdc ngudn nude ehl • d nhlim Hd bpt kich hoat vi sinh Id mdt sdn phim vd co nhung cd tdc dung cung cip d-xy du cho ngudn nude cin xu ly, nd kich hoat tich cue cdc vi sinh hdo phdn huy chit hCeu co thu'a cd nude d nhiem md khdng cd bit ky mdt phdn ung hod hoc ndo xdy Tan dung tinh chit ddc biet eua he bpt kich hoat vi sinh, Idn diu tien d Viet Nam, chung tdi di xuit mdt cdng nghe xu ly d nhlim ngudn nude cdc ddng kenh rach, noi thu gom, van chuyin nude thdi cho ede phd, dd thi Idn hien nay, gdp phin gidi quyit mdt phin bdi todn vdn tdn fg/ hang thdp ky vd ngdy cdng nan gidi nhung chua cd gidi phdp xu ly d nhiim thich hap Bot kich hoat vi sinh - Bioaktiv-Eco Bdt kfeh hogt vi sinh (Bioaktiv-Eco) dugc san xudt ti> bdt phin dd ty nhien dya tren viec dp dung cdng nghe NANO kit hgp cung cip nang lugng he dao dpng cao tan vdi cdc chit bo trg cin thilt [4, 5] Bpt Bioaktiv-Eco cd tdc dung kich hogt tfch eye cdc vi khuin hdo phdn huy chit huu ca Trong qud trinh xu ly nude bing bpt Bioaktiv-Eco, mpt lugng Idn khf d-xy dugc giai phdng, vi khuin hdc hip thu lugng d-xy ndy vd nhd vdy md sinh san nhdn len gip bdi Su dung bdt Bioaktiv-Eco xu ly nude thai cd uu dilm Id tao nen mpt qud trinh I n djnh vd tuang doi bin vung d l phdn huy ede chit hu-u co Idng nguon nude dugc xu ly Han nOa, nd cho phep thuc hien vipe xu ly nude thai md khdng cin thay doi hodc cai tgo ciu true he thong kenh rgch din thodt nude thai hodc xdy dung cdng trinh xu ly rieng Bdt Bioaktiv-Eco dung d l xu ly nude thai hodc nguon nude d nhiem ndi chung gom ba logi chinh sau: - Bdt Bioaktiv-Eco.TS : Bpt xu ly nude thai, xu ly nude nudi trdng thuy san; - Bpt Bipaktiv-Eco.CN2: Bdt xu ly' phdn huu co, chuong trai, nude thai chdn nudi; - Bdt Bioaktiv-Eeo.CN3: Bdt xu ly chit thai huu CO cdng nghipp U'ng dung bot kich hoat vi sinh xijp ly nhilm ngudn nu'ac dong kenh rach a Dac diem moi trw&ng kenh rach & Viet Nam Ode thu cua cdc kenh rgch d cdc thdnh pho, dd thi nude ta Id chay luon Idch giu'a cdc khu ddn cu, thdm ehf ngudi ddn cdn Idm nhd tren cdc ddng kenh dd vd biln chiing thdnh nai tieu thcdt mpi chit thai Ddy Id vin d l Ijch su dd ton tai hdng tram ndm nay; khdng thi mpt sdm mdt chilu cd thi quy hogch, cai tgo, khdc phuc dugc Mdt khdc, dat nude cdn nghdo md viec khdc phue d nhilm mdi trudng thudng ddi hdi chi phi rit idn, chua k l viec khdc phuc d nhilm mdi thdnh phd bdng ede gidi phdp cdng nghe truyin thing hien thudng kep theo chi phi Idn cho viec chinh trang, cai tgo, gia eo he thing tipu thpdt nude, kpnh, muang vdi ehi phf Idn d l din bu, giai phdng mgt bdng, kien cc hpd bd kenh rach vv Hien d l khic phuc tinh trgng d nhilm nguon Ngudi phan bien: TS Nguyen Kien Dung Tap chi Khi ixifjng Thuy van * Thang 8/2008 37 ? Nghien cufu & Trao doi nude, cdc thdnh tu-ng budc giai quylt bing cdch: khdng bj cuon trdi nen khdng Idm giam hieu qua cua qud trinh xu ly; - Cong hda, be tdng hod mpt SP doan kenh, rgch vd tgo thdnh dudng gigo thdng cdng cdng hodc phuc vu gigo thdng tTnh Day Id mdt hudng tich cue, tgo them canh quan cho thdnh pho, gidi phdng dugc mdt phan deh tdc giao thdng, nhung khdng giai quylt dugc vin d l d nhilm nguon nude thai van chay ngim vd din dogn kenh hd ndo dd igi xuit hien vd dnh hudng nghiem trpng din ddi song, sue khoe, canh quan mdi trudng, chua ndi cdn tiem an nhilu nguy co khdc cung nhu gdy d nhilm nguon nude dudi dit vung dd thj - von Id nhung mim hog eua todn xa hpi - D l di ehuyin phuang tien, thilt bj phue vu xu ly d nhilm cd nhu cdu nen khdng gdy Idng phf diu tu - Xay dyng cdc khu xu ly tap trung Ody Id mpt hudng dung ddn md cdc nude tien tiln dd Idm vd thudng ndm quy hoach tu mdi xdy dyng mdt thdnh pho, hodc mdt khu mdi Cf nude ta, tap qudn, hodn canh Ijch su d l Igi, chung ta din vdn chua ldm dugc nhilu Thu nhit Id rit ton kem; thu hai khdng thi di ddi dan cu song ven hodc song tren kenh rgch; thu ba Id khdng thi mpt sdm mpt chilu quy hogch Igi todn bd he thong cong rdnh d l quy v l mpt SP tram thu gom xu ly nude thai nhit djnh thdnh [1,2] Cdn cu vdo ddc dilm eua khu vyc xu ly vd yeu cau doi vdi muc tieu chit lugng nude can dat dugc d dogn kenh rgch can xu ly cd thi dugc phan loai phuang thuc xu ly d nhilm nguon nude thdnh hai trudng hgp: 1) Xi> ly tren todn bd ddng kenh hay mpt dogn tuang doi ddi; 2) Xu ly ddng kenh rgch trudc vdo sdng chinh hodc thuy vyc ed nguon nude khdng bj d nhilm bo sung o l dgt dugc nhCrng tieu ehf neu tren, da nghien cuu d l xuit mdt phuang dn dd ton kem Igi cho hieu qua cao, nhanh chdng, nhit Id khdng anh hudng din ciu true hien trgng eua phe Giai phdp dugc d l xuit d ddy dya tren cdc co sd sau: a) Cho phdp chip nhdn sy ton tgi eua he thing tieu thpdt, kenh rgch hien ed, xem chung nhu mpt he thong thu gom, tieu thodt nude thai cua thdnh hodc eua mot khu vyc ndo dd; b) Cd thi chia ddng kenh rgeh thdnh tung dogn, b Mue tieu eua xw ly nhiem nguon nw&e tim nhung dogn hodc vj tri toi uu cho vipe xu ly d kenh rach va giai phap thwc hien nhilm, md chung tdi gpi la "Tram Modul Xu ly" Xu ly nude thai dugc thuc hien vd Nude thai mdi chay qua ede Modul nhu chay giu" nguyen trgng he thing kenh rgeh - noi thu gom, qua mdt Trgm xu ly vdi nguyen tie nude thai phai tru, thodt nude cua thdnh pho, khu ddn cu Mdt qua cdc mdng lpc vi sinh mdt dp sieu cao phdn huy khdc, ddng kenh rgeh dd bj d nhilm idu ngdy khdng cdc chit huu ca, dd : : t' ehl ddng nude thdi ma ca bun ddy cung bj d nhilm - Cdc chit huu ca dugc phdn huy nhanh, gin Do vgy thye hien qud trinh xu ly, gidi phdp dugc nhu hodn todn, ede khf dpc bj tript tieu, nude d l xuit d ddy hudng tdi viec bao dam cac tieu ehl sach tra lai; sau [3], [4], [5]: - Bao dam sy thdng thodng ty nhien eua ddng chay khdng gdy u dpng, ngdp ung; - Phat huy dugc cdc he vi sinh can thilt d l xu ly khdng chi ddng nude md edn ca bun ddy vd khf dpc d kenh rgch; - Khi ddng chay idn (vdo mua mua), vi sinh 38 - Cdc kim logi ndng bj phdn huy mdt phan, mdt phin dugc kit tua, Idng dpng xuong ddy kenh rach; - Bun rdc d nhiem dudi ddy kenh rgch cung dugc phdn huy vd dugc xu ly sinh hpc, trd nen sgch vd khdng anh hudng xiu din nguon nude; - Phin chit d nhilm ndo dd chua dugc xu ly hit qua cdc "Tram Modul Xu ly" se lai dugc tilp tge Tap chi Khi tif(/ng Thuy van * Thang 8/2008 Nghien cufu & Trao doi phdn huy qud trinh chay vi vi sinh dugc kich thudng vd sau hon Trudng hgp n l u ddng kenh hogt phdt triln manh v i n ton tgi, chung van t i l p tuc rach ddng deu thi "Trgm modul xu ly" dugc ddt d vj hodn thdnh "su mang" x u ly d nhilm cua minh d l tri cd t h i thu gom dugc lugng nude thai nhilu nhat Idm sgch nude thai vd kenh rgch d i n nude vd thudn tien che vipe thu gom rdc thai n l u chiing c) "Tram Modul X u ly" dugc xdy dung tren nguyen ly k i t hgp hdi hod tdc dung x u ly cdc c h i t d nhilm nguon nude [3, 4, 5] cua : trdi theo ddng nude d l khdng anh hudng d i n ddng chay b) Khodng each giua cdc Trgm dugc chpn thudc vdo ddc tinh vd c h i t lugng nude eua ngudn - He thing dem vi sinh; thai chay vdo kenh rgch, nhung thdng thudng cdch - He thing cdy vi sinh; khoang tu 600m d i n 1000m N l u cdc kenh rgch dd dugc cong hda hodc be tdng hod thi cd t h i - He thong Idng vi sinh; ' - He thong neo, co djnh dem, cdy vd long vi sinh; - D i l u hdnh, bao quan nguyen vdt lipu x u ly d nhilm (cd t h i k i t hgp nhilu khu vyc x u ly cung mdt thdnh pho); bo tri Tram d nai ndo kenh rgeh Id thien Trudng hgp n l u giug cdc Trgm ed nhilu nguon nude t h i i vdo thi ed t h i bo tri mpt vdi "Modul x u ly" phu d l ndng cao hieu qua x u ly e) Trgm Modul X u ly nude thdi trudc vdo - He hod tan vd bom dung djch kfeh hogt vi sinh; sdng chfnh (vdi nguon nude bdo ddm ede yeu c i u - He thing gidm sdt, kilm trg hieu qua x u ly; khai thdc, su dung theo muc dich SLP dung ndo dd) dugc bo trf cho mdi "Trgm" bao dam thu gom - He thong thu gom rdc trudc "Tram"; - Thilt bj bom dung djch vi sinh vd kfeh hogt vi dugc todn bd ddng nude thai vdo kpnh rgeh dd nhdm xir ly triet d l cdc nguon nude thai trudc xa sdng sinh • Tram Modul X I F Ly co u'U d i l m : • Don gidn, ft ton kem; vdt lieu chu y l u dugc san x u i t nude, xdy dung "Tram" nhanh chdng; • D i u tu xdy dyng khdng ddng ke, d l di chuyin cd nhu c i u ; d) N l u muc dich cua vipe xu ly nude thai he thing kenh rgch chi Id d l bao dam chat lugng nude phai dgt tieu c h u i n ndo dd trudc xd ddng sdng chinh thi cd t h i bo trf "Trgm" vdi nhilu "Modul xCr ly" vdi khoang cdch giua eae Modul bdo dam hgp ly d l ed t h i XLF ly tot nhat nguon nude thdi • Khdng can trd ddng chay; Cong nghe sip dung xip ly nu'd'C thai • Khdng anh hudng d i n canh quan ddng kdnh kenh rach rach vd khu Idn edn; Do ddc thu cua dia bdn e i n x u ly Id kenh rgch • Khdng can trd d i n qui hogch, cai tgo, thay doi nai nude thai dd thj ludn ehuyin ddng nen phai gia tdng lugng vi sinh hdo khf phdn huy c h i t hCru eg ddng kenh sau ndy Nhuge d i l m cua "Trgm Modul X u ly": Hogt dpng cOa trgm ed t h i gdy anh hudng d i n giac thdng dudng thuy tren kenh n l u ddng kenh rgeh dugc su dung vdo giao thdng dudng thuy thua, vdy cdng nghd md chiing tdi de x u i t Id cdng nghe kich heat vi sinh tich cue bang He bdt kich hoat vi sinh (he bdt Bioaktiv-Eco) phdn huy chat hu-u CO thCra nguon nude e i n xu- ly vd bo sung vi sinh hu'U ich thudng xuyen, dd su" dung he De dat dwac hieu qua cao xu'ly nhiem bpt kfeh hogt vi sinh Id chu dgo Ddy Id mpt cdng nguon nw&e eae "Tram Modul XCr ly" can dwac nghp Iin d i u tien d Vipt Nam dugc de x u i t irng bo tri & eae vi tri sau: dung trcng xu- ly d nhilm mdi trudng ndi chung vd a) Nai ddng nude chay tuong doi chdm, nghTa Id nai Idng d i n kenh rgch dugc md rpng, to hon binh XLK ly kenh rach, nai cd sy ehuyin dpng lien tuc eua nguon nude bj d nhilm ndi rieng [4] Tap chi Khi tufgfng Thuy van * Thang 8/2008 39 Nghien cufu & Trao doi Mpt nhO'ng tdc dung quan trpng eua He bdt Bioaktiv-Eco phdn huy chit hOu ca thu'a Id giiip gia tdng lugng d xy hod tan nude len mire rit cao, thdm ehf gia tdng lugng d xy hod tan nude dudi mat ddy cua kenh rgch nen se tgo cho cdc vi sinh hdo cd dilu kipn phdt trien nhanh md khdng cin din he thong xuc bo trg Mdt khdc, mat dp vi sinh cao se giiip cho qud trinh phdn huy nhanh hon, hieu qua hon cdc chit hCfu co thu'a nude thai Do vdy, su kit hgp cdng nghe kfeh hogt vi sinh vd gia tdng vi sinh hu'U ich se tgo rg mpt gidi phdp thich hgp nhat d l xu ly hieu qua nude thdi he thong kenh rgch tilp nhdn nude thai thdnh pho, thj a Modul Xw ly Trong qud trinh thye hien xu ly nude thai, d l ndng cao hipu qua xu" ly vd thudn tipn thi cdng, cd thi thilt lap cdc "Modul Xu' ly" d l triln khai tren thuc dja viec xu" ly cu the nude thai mdt dogn, mpt khu vyc cua he thing kenh rach Cdc "Modul Xif ly" tgo sy kit hgp hdi hod giug dem vi sinh, "cay" vd "Idng" vi sinh lam gia tang kha nang luu giu vi sinh vdi mat dp rit cao, tif dd ndng cao hieu qua xu* ly nude thai, song vdn bao dam sy thdng thodng ty nhien cua ddng chay he thong o l thudn Igi vd ndng cao hieu qua triln khai xu' ly nude thai trpng he thing kenh rgeh, cd thi thilt lap cdc "Tram Modul Xif ly" Mdi "Trgm Modul XCr ly" ed thi cau tgo tu* mdt hodc nhilu "Modul Xu' ly" thudc vdo ypu cau vd mifc dp d nhilm cua nguon nude thai, toe dp ddng chay dilu kipn cu thi cua he thong kenh rgch thu gom, tilp nhdn, tieu thodt nude thdi vv b Npi dung chinh cua quy trinh xw ly nw&c thai - Thilt Igp Trgm Modul XCr ly; - Dung H$ bpt Bioaktiv-Eco phdn huy chit hifu CO thua xu ly so bp todn viing cin xu' ly, dong thdi bo sung vi sinh hdo hu'U hieu d l Idm sgch ddng nude; - Ddnh gid hieu qua cua qud trinh xu" ly so bd; 40 - Cdn eif vdo viec ddnh gid, khoang ngdy sau xCf ly so bd ein quylt djnh viec tiln hdnh xu' ly bo sung bdng cdch cung cip them vdo nguon nude thai He bdt Bioaktiv-Eco, song nen bo sung lugng vi sinh hu'U hieu hdng nhung cd thi giam din v l so lugng; - Cdc dgt XU' ly tilp theo ein tiln hdnh khoang tuin/1 iin (xir ly bo sung) bdng He bpt Bipaktiv-Eco, cdn be sung vi sinh vdn dugc tiln hdnh hdng ngdy nhung gidm v l lugng; - Trong mpt hai iin diu xd ly, dung djch bdt kich hogt vi sinh dugc rdi diu len mat nude vd bom sau vdo Idng kenh rgeh Trong nhO'ng dgt tilp theo, chu ylu rai diu dung djch bdt kfeh hoat len b l mat, edn dung djch vi sinh cung dugc rdi diu len b l mat, nhung tap trung d noi nguon d nhilm chay vdo kenh rgch Trong qud trinh xd ly, ddy kenh rgeh cung dugc XU' ly bdi vi sinh hdo nen biin ddy kenh rach sach din lgi, giam khoi lugng, tin suit phai nao vet kenh rach so vdi chua dugc xu' ly Hieu qua xip ly nhilm ngudn nu'ac kenh rach bdng cong nghe kich hoat vi sinh (bpt BioaktivEco) phdi hgp vai vi sinh hOu hieu a Hieu qua kinh te 1) Chi phi ban diu vd van hdnh Do cdng nghe, phuang tien cung nhu viec thye hien xCr ly nude thai rit tien Igi vd don gian nen chi phf thuc hien cdng tdc xu ly nude thai khdng ddng ke so vdi chi phi cac phuang phdp, giai phdp cdng nghp truyin thong khdc NhO'ng ehi phf chfnh ed thi dugc khdi todn sa bd nhu dudi ddy (dya tren dinh mire chi phf thye hien mdt so cdng trinh xir ly dd dugc thuc hien d nude ngodi vd thye hien XU' ly mdi trudng nudi trdng thuy san d cdc dja phuang [4], [5]) Chi phf cho mdt dogn kenh cd chilu ddi 1000 met, rdng 10 met vd chieu sdu ddng nude khoang m dugc udc tfnh nhu sau : - Xdy dyng ca ban : khoang 300 000 OOOd cho hai "modul xu" ly" (khau hao thilt bj ndm) vdi cdc thilt bj di kem (ed thi dung cung liic cho nhilu dogn kenh khdc ciing mot thdnh phd hay cung mpt khu vuc: ghe/thuyen d l di ehuyin kenh Tap chi Khi ttfOng Thuy van * Thang 8/2008 Nghign cufu & Trao doi rach rdng; xe chuyen dung d l bom dung djch vi Do vay d i l u kien nude ta, tai cac dd thj, sinh vd kich hogt vi sinh; thung composite; mdy thdnh dang t i n tgi he thing kenh rgch lam khuiy cdng suit 125W, 150-200V/phut; mdy bom, nhiem vu thu gom-trO'-tieu thoat nude thai nhu hien luu lugng Q=10 l/h, cdng suitO,1KW; [1, 2] thi viec xif ly true t i l p tren kenh rach bdng - Chi phi van hdnh: (3-5 cdng nhdn bdo tri vd van hanh; nguyen lieu: He bpt kich hoat vi sinh, vi sinh htfu hieu vd cdc chi phi khdc) khoang 160 000 OOOd/thang xd ly (cho ddng kenh cd luu lugng nude 155 000 OOOm^/thang hay khoang 60m%) Igi vd hieu qud kinh t l hon han so vdi giai phdp xd ly ddi hdi phai gidi phdng mat bdng, xdy mdi cac tram xu' ly tap trung tren cgn c Hieu qua moi trw&ng Viec xif ly nude thai true tilp tren kenh rach bdng Tu' nhung k i t qua tfnh todn sa bd tren ed the thiy ring, chi phi cho viec xu' ly nude thai tryc tilp tren cdc ddng kenh rgch khdng tdn kem vd tien lgi han so vdi xdy dyng he thing thu gom xu" ly tren can nhit Id hodn canh nude ta b NhO'ng hieu qua kinh te chinh 1) vi ehi phi xdy dung co sd ban diu •' cdng nghp He bpt Bioaktiv-Eco vd vi sinh la r i t tien Tram xd ly nude thai tap trung tren cgn, khdng k l chi phi xdy dyng he thong thu gom nude thai, chi phi xdy dyng, Idp dat thilt bj, chuyen giao cdng nghp udc tinh h i t khoang 400 - 500 tripu ddng d l cdng nghe He bpt Bioaktiv-Eco vd vi sinh dem Igi hieu qua r i t Idn v l mdi trudng, trudc h i t dd la: * Gidi quylt dugc tinh trang d nhilm mdi trudng cdc ddng kenh rach, ho dam thdnh pho, dd thj von dd id v i n d l nan giai, ton dpng nhilu thdp ky lai ngdy mpt nghiem trpng hon qud trinh phdt trien kinh t l , xd hdi vdi t i e dp dd thj hod, cdng nghiep hda r i t nhanh, mang nhieu tinh tu phdt * Giai q u y l t tinh trgng d nhiem khdng khf nude thai ede ddng kenh, h i d i m bj d nhilm sinh XU" ly nude thai sinh hcgt vdi cdng suit 100 m^/ngdy dem Trong dd, xu' ly tryc tiep tren kenh b i n g * Giam thilu dugc cdc phdt sinh djch benh cdng nghe Hp bpt Biogktiv-Eco phoi hgp vdi vi sinh nguyen nhdn chu y l u Id d nhiem kenh rgch, khdng tien lgi vd re han g i p nhilu i i n md tan dung dugc d l cdc ky sinh ed hgi phdt triln kenh rgch ty nhien Idm ddng thu vd thodt nude thai * Sifc khoe eua hdng van ngudi ddn vd ede t h i nhu hien trgng he k l t i l p sau song Idn can cdc kenh rgch bj d 2) vi bdo tri vd van hdnh nhilm dugc cai thien, khdng phai song chung vdi mill sii u l , vdi ruoi, mudi vd benh t d t t i l m i n thudng Vdi trgm xir ly tdp trung tren cgn ddi hdi chi binh tryc qudn 2.500 d/m^ nude thdi sinh hogt, cdn xd ly true tilp tren kenh rach bdng cdng nghp He bdt BioaktivEco phdi hgp vdi vi sinh ehi phf ehl dudi 10 d/m^, cung re han r i t nhilu i i n * Cdy trdng, vdt nudi khdng m i c benh, khdng cdn Id nguon gieo rdc benh tdt cho eon ngudi * Mdi trudng sgch, khdng mill d nhilm s§ tgo canh quan mdi cho thdnh pho, thiic d i y ngdnh du 3) Thdi gian thuc hien ijch phdt trien, tgo nguon thu nhap cao cho thdnh Thdi gian thuc hien cdc hogt dpng ke tii' khdo vd khu ddn cu sdt d i n dua vdo sif dung cdng nghp xCr ly nude thai bdng He bdt Bipaktiv-Eco tren kenh rgch * Mdt kenh rach dugc cdi tgo khdng ehl mdi nhanh hon rat nhilu so vdi xdy dyng ede tram xif ly trudng thdnh pho, khu dan cu dugc cai tgo nude thai tap trung tren can: Chi m i t 1-2 thdng khdo md edn nhifng khu d luu eua cac luu vuc sdng sdt, c h i tao cac modul vd Idp dat, sau dd Id d i l u cung dugc cai thien, ldnh hon chinh vd van hdnh xu ly nude thai, dem lai hieu qud K i t luan nhanh chdng, true quan Chit lugng vd hieu qua cua He bdt kich hogt vi Tap chi Khi ttf(?ng Thuy van * Thang 8/2008 41 Nghien cufu & Trao doi sinh Bioaktiv-Eco xif ly d nhilm ngudn nude vd dd thj bdng He bdt Bioaktiv-Eco cung nhu sy trinh bdy tren day dd dugc irng dung cdng d thich hgp eua cdng nghe ndy vdi hien trgng he nude ta vdi sy kilm nghiem hien trudng cua cdc ea thong kenh rgch tieu thodt nude thdi, vdi d i l u kipn quan quan iy nhd nude ed tham quyln vd dd dugc dja ly, hien trang vdt chit, kinh phi hien d dilu kien nude ta ed t h i thiy, cdng nghp xCr ly nude thai c i p cdc chifng ehl eua : - Cue Qudn ly chit lugng an todn ve sinh thu ythuy san, so TS-0033H/07 ngdy 8/2/2007; thdnh pho, dd thj bdng He bpt Bipaktiv-Eco phoi hgp vi sinh lan ddu tien dugc d l x u i t d nude ta Id cd tinh kha thi cao Vdi trinh dp chuyen mdn, ky thuat - Chi cue Tieu chuan ludng c h i t lugng, so HN-0621/2007/CBTC-TDC, ngdy 29/8/2007; ciia cdc edn bd lien quan d i n tdi nguyen nude vd ky thuat mdi trudng nude hien cd t h i bao dam cho - Chi cue Tieu chuin ludng chit lugng s i HN- qua trinh thye hien cdc cdng doan xu" iy nhanh, dgt hieu qud cao Cdng nghp xif ly nude thai dd thj bdng 0622/2007/CBTC-TOC, ngdy 29/8/2007; He bdt Bioaktiv-Eco phoi hgp vi sinh cd t h i dp dung Cdc nhdn xet v l k i t qua ifng dung He bdt Bioak- rpng rdi cho nhilu dja phuang, nhit id nhO'ng khu tiv-Eco xif ly ngudn nude bj d nhilm dugc vyc bj d nhilm gdy hgu qua nghiem trpng cho ddi trinh bdy ehi tilt tdi lieu [4], song, sire khoe nhdn ddn vd canh quan mdi trudng Xet t i t ea cdc mat, tif hieu qua kinh t l (kinh phf nhu d he thong sdng Kim Nguu-Lir-Set-Td Ljch, khdng Idn so vdi b i t ky phuang phdp xif iy ndo Nhue-Oay sdng C i u , he t h i n g kenh Thj Nghe- khdc) vd hieu qua mdi trudng d i n co sd khoa hpc, Nhieu Ldc, sdng Thi Vdi, hg luu sdng Odng Ngi-Sdi thye tiln dp dung cdng nghe xif iy nude thai thdnh Gdn "'" '~'ii^^^st -