Tap chi Khoa hoc Tnr&ng Dai hoc Cdn Tho Phdn A Khoa hoc Tu nhien Cong nghe vd Mdi tnr&ng 2812013/ 80 85 |̂ „, Tap chl Khoa hpc TrUcfng Dai hoc Can Thcf website sj ctu edu vn KHAO SAT HIEN TRANG StT D̂[.]
Tap chi Khoa hoc Tnr&ng Dai hoc Cdn Tho |^.„, Phdn A Khoa hoc Tu nhien Cong nghe vd Mdi tnr&ng: 28 Tap chl Khoa hpc TrUcfng Dai hoc Can Thcf website: sj.ctu.edu.vn KHAO SAT HIEN TRANG StT D^JNG VA TIEM NANG XfNG D^NG HAM U BIOGAS Of MOT SO XA THUQC TINH TIEN GIANG Dao Mai Tnic Quynh', Nguyin V5 Chau Ngan', Jan Bentzen^va Kjeld Ingvorsen^ ' Khoa Moi trudng & Tdi nguyin Thien nhiin, Trucmg Dgi hoc Cdn Tho Trudng Kinh doanh Aarhus, Dgi hQC Aarhus, Dan Mgch ^ Bg mon Khoa hoc Sinh hoc vd Vi sinh, Dai hgc Aarhus, Dan Mgch Thong tin chung: Ngaynhdn: 23/05/2013 Ngdy chdp nhgn: 29/10/2013 Title: Survey on biogas using status and appliances at Tien Giang province Td khda: Ifng dung biogas, cdng nghi biogas, tinh Tien Giang Keywords: Biogas appliance, biogas technology, Tien Giang province ABSTRACT This study evaluates the biogas appliance and the possibility lo enhance the development of the biogas practices in the Mekong Delta There were 100 households with and without biogas installation at Tien Giang intei-viewed Before constructing the digester, there were 54/65 biogas-user households applied pig dung direct to their frees households discharged direct to the surrounding canal, and the rest of households buried pig dung at their garden or gave to their neighbor For 35 non-biogas user there were 10 households applied pig dung direct to their frees, households discharged direct to the surrounding canal, 10 households sold pig dung to their neighbor and the rest of households buried at their garden Among 65 biogas-user households, ther was 41 households mentioned on decrease of disease after construct a biogas plant, 22 house-holds connect their toilet lo biogas plant, and 26 households mentioned time-saving (i.e quick cooking with biogas and save time from wood collection) for husbandry and gardening About 60% of non-biogas user households had information on biogas technology but they did not construct a biogas plant due to high investment cost 70% of the non-biogas household would like to install a digester if the nrvestment cost of about million dong while the rest could construct one if they were offered (freely) 50% oj investment cost TOIVI TAT Nghiin cuu nhdm ddnh gid hiiu qud sir dung hdm u biogas vd khd ndng phdt triin cdng nghe biogas d DBSCL Dd tdi dd liin hdnh phong vdn 65 hd ed hdm it vd 35 hd chua cd hdm ii d tinh Tiin Giang Kit qua diiu tra cho thdy trudc klii xdy dung hdm u cd 54/65 hd bdn tuai cho cdy trdng, hg thai trifc tiep xudng kenh rgch, cdc ho cdn lgi cho hdng xom hodc ddo ho chdn lap sau nhd ddi vdi 35 hg chua xdy hdm u co khodng 10 hg bon tuoi cho cdy trdng 10 ho bdn cho hdng xom hd thai tnrc tiep xudng kenh rgch, cdchg cdn lgi ddo ho chdn ldp sau nhd Trong so cdc hd cd hdm ii, 41 hg cho biel binh tdt gidm di fir cd hdm u 22 hg kil ndi nhd vp smh vdi hdm u 26 hg su difng thai gian tiit kiem nhd dun ndu bdng biogas hogc khdng phdi thu gom cul di ldm cdc cdng viic khdc Doi vdi 35 ho chua cdhdm ii thi cd 60% biit vi cdng nghi biogas nhung khdng xdy dung vi von ddu lu cao: khoang 70% hg ddn cd nhu cdu xdy dung vdi diiu kien vdn ddu tu dudi 3.000.000 ddng 30% cdn lgi si xdy dung hdm u neu duac ho tro 50% vdn xdy dung Tgp chi Kboa hgc Tnrang Dgi hgc Cdn Tho Phdn -4: Khoa hgc Tu nhien Cong nghi vd Moi truong: JS i20l3i 80-83 MO DAU Nudc ta dang chuyin minh va phat trien cimg nen kinh ti thj ttudng Unh vyc kinh tl nfing thfin cd nhiiu khdi sdc va chuyin biln rd ret, vimg ddng bdng sdng Ciru Long (DBSCL) ddng gdp 36% gid tti xudt khiu ndng nghiip ttong nin kinh ti cd nudc (Tdng Cyc Thing kl, 2012) Co cdu kinh ti nfing nghiep, nfing thfin cd nhiluthay ddi, ngdnh chdn nudi dang timg budc phat trien va giir vi tti quan trong sdn xuat ndng nghiep Theo Bill Nguyin (2011), Vilt Nam cd khoang 8,5 trieu hp chan nudi nhung chi cd 20% hfi xdy dyng him u biogas Tfing ddn gia sue, gia cdm cd nudc thdi khoang 79 -^ 80 trieu tin chdt thai rdn mfii nam giy nhilm mdi tmdng nfing thfin nghiem ttpng Chit thii chdn nufii lim fi nhiem khong kfai, fi nfaiem ddt, fi nhiem ngudn nudc giy nin cdc benh vl dudng hd hap vi duong tiiu fada ttong chat thdi cd chiia nhilu vi sinfa vat gay benh, giun sin inh hucmg den siic khde ddi sdng ciia ngudi dan (Monre,20]2) Tmdc tinh hinh dd cfing nghe biogas da dugc gidi thieu d DBSCL tir nhihig nam 1980 (Vo Chau Ngan Nguyen et 2012) Viec xay dung he thdng biogas la mfit giii phap xir ty chit thii chan nudi hieu qua, ddng thdi tan dyng dugc ngudn nang lugng sgch Trien khai img dung cfing nghe biogas Id mfit giii phip chu ylu dl giai quyet tinh ttgng fi nhiem mdi truong nfau tdm gidm khoi tir niu in, miii hfii ttong chan nufii gidm rufii muoi, hgn cfai benh tiiu duong dau mit (Nguyin Quang Dung, 2011) Ben canh dfi eon cung cip ngudn chat dfii tilt kilm nSng lugng rdt hieu qua d cdc vimg ndng thdn ttong diiu kiln gii nhien lieu tang nhanfa nhu hiln nay, mfit binh gas 12 kg tang 119.000 dfing chi ba thang cua nam 2012 (Timg Nguyin, 2012) Hiln nay, ngudi dan d DBSCL da dp dung mot sd mfi hinh li biogas nhu TB-BP, PE, KT2, EQl, EQ2 va composite (Vo Chau Ngan Nguyen et al, 2012) Mic diJ cac ham u / nii ii biogas dd cd nhung anh hudng tich cyc nhung ttong qud trinh phdt friin cfing nghe biogas gdp khfing it khd khan dan din tdc dfi trien kfaai cham (Nguyin Vd Chdu Ngan, 2012), Dung trudc van de mot sfi khio sit ling dung ham li biogas quy md hp gia dinh da dupe thyc hi|n tgi cdc tinh tai vimg DBSCL Chang han frong khuon khfi dy an "Kfai sinh hpc cho nganh chdn nudi Viet Nam" da khdo sat tgi Tien Giang nam 2005 Tra Vinh nam 2009, Ben Tre nam 2010, Ben Tre va Kiln Giang nam 2011 Ben cgnh dd cung co nhtmg cupc khio sat khic d Can Tho vao nam 2004 (Florian Wieneke 2005), Cdn Tha, Ddng Thip vd Hdu Giang vao ndm 2010 (Nguyen Thi Thiiy Duyen vi Nguyin Thi Vi|t An 2010) Nghiin ciiu ndy dugc diyc hien nham tiep tue danfa gii hieu qua su dyn^ hdm li biogas cung nhu kha ning phit ttiin hdm u biogas d DBSCL Dya vio dilu ki?n dia ly vi tinh hinh irng dyng him li hiln tai d DBSCL, pham vi nghiin cim dugc thyc hien d cac hd cfadn nufii ciia tinfa Tien Giang FHirONG PHAP NGHIEN CUtJ 2.1 Phirong phap ngfaien cihi Dl tai dugc thuc hien ttong tfadng nam 2012 tgi xa Thanh Nhut vd xa Binfa Nhi huyen Gd Cfing Tdy, xa Dao Thanh vi xa My Phong eua phfi My Tfao, tinh Tien Giang Dya vdo danh sdch cac hd ddn dugc dia phuong cung cip phdng van nhdm hg ddn: 65 hp din di cd him li / tiii li biogas (chilm 21,5% tfing sfi hd cd hdm u / nii li d dja phuong), vi 35fafidin cfaua cd hdm ii / tiii u biogas (chilm 76,3% tdng sd fad chan nufii nhimg chua xay dyng hdm li / tiii u d dia phuong) Cgp nhgt hai bing cdu hdi pfadng vin tir di t^ "Khao sat hiln frang, tiem nang va iing dyng cua hdm li / till u biogas mdt sfi tinh DBSCL" Nguyen Thj Thiiy DuyIn vi Nguyen Thi Vilt An thyc hiln nim 2010 Bdng cdu hfii chudn bi la dang ciu hfii kit hgp vira dang cdu hfii chpn lua, vira dang cdu hfii md Tryc tilp din hd ddn va ghi chep cdc cdu fra ldi vao bdng phdng van, ddng thdi ghi nhan hien ttang sir dyng ham ii / tiii ii ddi vdi cic hp da cd ham u / tlii ii biogas Kit qui phfing vin dugc tfingfagpvd Xii ly bang phdn mim MS Excel 2007 KET QUA VA THAO LUAN 3.1 Cac hp dan cd su dyng ham ii / tiii ii biogas 3.1.1 Tinh hinh chung Hau hit cdcfapdiu cd ddy dii tlln nghi can thiit nfau ti vi, xe may Dilu kiln sdng thoai mil vol 100% hfi deu ket ndi dien, 32 hfi cd nha kiln co chilm khoang 49% 30 hp cd nha Igp ngoi hogc lap tfin chiim khoing 46%, cic hp lai nhi la Trinh dp hpc vin tgi cic hp khio sat kha cao, voi tfing sfi ngudi ti 296 khoang 70% co hpc lyc tir trung hpc co sd, trung hpc phd thdng, cao dang / dai fapc vd ttin dai hpc, khoing 25% da va dang hpc tiiu hpc sd cdn lai Id tre em nin kfadng din tmdng vi mfit so la nfaihig ngudi ton tudi ngdy tmo€ kfadng cd dilu kien hoc tap Tap chi Khoa b^'c Tnr&ng Dm hoc Cdn Tho Phan A: Khoa hgc Tu nbien Cong nglie va Mai Irir&ng- 28 (2013) 80-85 B khdng den Ir B tiiu hpc • THCS B7HPT DDH-CD Hinfa 1: Trinh d$ hpc V^Q eac thanb vien ciia cac hp dan co ham u / tui ii biogas Chii hfi deu ti ndng din vdi cfing viec chinh la chan nudi vd ttdng ttpt (lam rupng, tim vudn vi frong cdy cfing nghi|p) chiim khodng 93%, cfing chiic chiim khodng 5% Thu nhdp chinh cua cdc hp gia dinh chii yiu ti nhd vio chan nufii va trfing frpt Thu nhap binh qudn ciia 65 hfi khoing 1.600.000-^1.700.000 ddng/ngudi (ki cd ngudi dp tudi lao dfing va ngoii dp tufii lao ddng) Q ^ vudn 20% ^ ' ^ rupng •1 cSy cdng nghiep • chan nufli • cdng chirc Hinh 2: Ngfai nghiip cfainfa ciia cdcfadddn cfi him u ItAiu biogas • bon lucri cho cay Irong • rtrii trytc tiep H kliac Hinh 3: Phinmg phdp xii- ty phan gia sue trud'c xdy him u cua cdc h$ dan Y thiic mfii truoTig ciia cic hp din tdt, trudc xiy dyng him ii / tui li khoing 83%faddem cfadt tfaai chdn nudi bdn cho ciy frdng khoing 11% hp thdi tryc tilp xudng kinh rach, sd cdn tgi cho hang xomfaoicddo hfi cfadn tip sau nfaa, Hiiu biit ciia nguoi ddn vl hdm ii / tiii ii thdng qua can bp dy an 68%, ngudi than - hang xdm 17%, ngudi da c6 him u 10%, lgi nhd phuong tien trayin thdng Kich thudc him li / ttii ii ma cac hp ddn chpn phdn ldn cin bo dy in tu van (chilm khodng 81%), vice noi him u / tiii li biogas vdi nhd ve sinh ciing cdn bp dy an tu vdn (cfaiem khoang 35%) Cac fad cdn tgi cho rang nhd vl sinh da ty hoai nen khfing noi nhi vl sinfa vdi ham ii / tiii u biogas (chilm kfaoing 30%), khodng 35% hfi khfing ndi nha ve sinh vdi hdm ii nha ve sinh vd hdm u qui xa Logi ham u md 65 hd din dugc khdo sat xdy dung pfafi biln li KTl chiim kfaodng 80% 6% hd xdy ham KT2, cic hfi cdn lai lip tiii ii PE 3.1 Lgi ich ve kinh ti Tmdc day cfaua co him u biogas da sd ngudi din ttong khu vyc dun niu bang ciii, gas binh hodc bang frau Dfii voi mdt sd gia dinh mua Clii, frau va gas dl sii dung co thi thdng ke dugc thi trang binh mdi thing mdi gia dinh tiiu ton khoing 180.000 dfing chi phi chit dot Tir co biogas da sd chi sii dung biogas cho sinh hogt hang ngay, chi phi chat dfit gidm tir 80-100% Vdy mSi ndm mii hp tiit kilm dugc khoang 1.700.000-2.000.000 dfing chi phi chat dfit Thoi gian tilt kilm dugc tir co biogas chinh la khoang thoi gian cho cfing viec thu nhat ciii va chuin bi bip nau Thoi gian dl tgo mpt thudc ciii kho diing cho dun ndu tfin gdn mfit tudn 11 bao gdm viec thu gora, che cui va phoi ciii (nlu ttdi ning tot), niu vao miia mua thi thoi gian phoi ciii cfi tfal keo dai din mfit tuanfrongkhi vdo miia nang thi chi mat khoang 3-5 (tiiy loai ciii) Niu tinh theo thdi gian thyc tl udc lugng tiet kiem dugc khodng 78 ngay/nam Neu tinh trang binfa mot cfing lao dfing la 120.000 dfing/nguoi (tai tfadi diem khao sdt) thi Icri ich thay dugc ciia ham ii biogas mang tgi li 840.60(H960.000 dong/hd*ndm-' Nhu vay cd thi quy sfi tuong duong bing tiin vao khoang 2.540.00{K2.960.000 ddng/nam (thdi diim cudi nam 2012) Ddy ti tgi i'ch kinh tl thiy dugc sir dyng ham u biogas mang lai Dfing thoi bin canh nfairng tgi ich rfi rdng cd nhiing Icri icfa kfadng thiy dugc nhu thdi gian ranh rfii niy da sd ngudi din Iham gia chdn nudi, ttdng ttpt hogc lam cdng viec thii cdng dl tdng thim thu nhdp Dac bilt giai phdng bdt siic lao ddng ciia ngudi phy nii ttong gia dinh vi thudng phy nii la ngudi thu gom cui va tryc tilp ndu nudng cic bira an gia dinh Nhung tgi ich ndy khdng tfal tinh bang tien dugc Tap chi Khoa hgc Tnr&ng Dai hoc Cdn Tho 3.1.3 Lgi ich vi mdi Phdn A • Klioa hgc Tu nhien, Cdng nghi va Mdi tru&ng: 28 (2013) 80-S5 trudng 100% hd din cd du gas sii dung cho bep biogas vile ndu an hing ba budi sang, tma, chieu vi nau them nudc udng hodc nudc tam hang ngiy Thgm chi mdt sfi hd xd bd lupng gas thira hogc chia cho hdng xdm sir dung Cd khodng 90% hp phong vdn cfao biit faim ii / tiii li biogas giiip ldm sgch mdi tnrdng 83%fapxiy dyng ham u / ttii li biogas cd ndng lugng sacfa dl dimg vi 32% fad thiy giam miii vi benh nhd hdm u / tiii u biogas 3.2 Cdc hd khong sir dang ham ii / tui ii biogas 3.2.1 Tinh hinh chung Hdufallcdc hg diu cd day du tiln nghi cdn thilt nhu ti vi, xe may Dieu kiln sdng thodi mii vdi 100% hp deu kit ndi dien 10 hd cd nha kiln cd chilm kfaoing 28%, 24fagcd nhd tpp ngfiifaoacIgp tfin chiem khoang 68%, cdc hg cdn lai nhd Id Trinh dp hpc vdn cdc tfadnfa viin ciia cdc hd Ichio sit Cling khac cao vdi tdng sfi ngudi la 154 tfai kfaoang 62% co fapc lyc tir trang hpc co sd, trang hpc phd thdng, cao ddng / dgi hgc vd frln dai hpc, cd khoang 31% da vi dang hpc lieu hgc, sd lai la fre em nin khfing din trudng vi mpt sd nguoi ldn tudi ngdy trudc kfafing co dilu kiln hpc tgp Chii hp deu la nfing ddn vdi cfing vile cfainh li cfadn nudi chilm khoang 43%, ttdng trpt (tim radng va ldm vudn) chilm khoang 57% Vi vdy, tfau nhdp chinh cua cdc hfi gia dinfa chii ylu li nho vao chdn nudi \a frdng frpt flchann Hinh 4: Nghe nghidp cfainfa ciia cac hp dan chua cd ham ii / tui ii biogas Cic fad kfadng cd faim ii / tiii ii biogas sir dyng khodng 29% lugng chdt tfadi chan nufii dugc ban cho hang xdm kfaoang 29% lugng cfait tfadi chan nudi dupe cfadn sau nfai, kfaodng 28% lupng cfaat thai chan nuoi bdn tuoi cho cdy frdng, va cdc fad cdn lai thdi tryc tiep xudng kenh rach chiim khoang 14% • bon tuoi cho c»' trdi^ • r.ir,hMg\Dm Q thai tnic tiep Hinfa 5: Cacfa thuc xir ly phan gia SQC cda cac hg daD 3.2.2 Chi phi ve chat dot Dfii vdi nfaihig gia dinfa mua cui, trau va gas dl sii dung cd the tfadng kl dugc trung binh mfii thing mdi hd dan nlu tdn khodng 160.000 dfing chi phi chit ddt Bin cgnfa dd tfadi gian nfaat cui vd pfaoi cui dugc udc lugng kfaodng 7-8 i^dy/ndm Neu tinfa trang binh mdt ngdy cdng lao ddng la 120.000 ddng/ngudi (tai then diim khdo sit) tfai cfai phi phdi cfai frd la 840.000^960.000 ddng/hg*nam-' Nhu viy tdng chi phi chdt ddt pfadi cfai trd kfaodng 2.760.00{K2.880.000 ddng/hd*ndm-' 3.2.3 Thdng tin ve lidm u/ tidu biogas Trong tdng sd 35 fad cd 14fadla kfadng bilt gi vl cdng ngfal biogas Cdcfadcdn lai bilt ve hdm li / tlii ii biogas thong qua truyin tfadng (7 hd) thdng qua ban be hang xdm (8 hp) thdng qua can bfi dy in (5 hd), tfadng qua chii him ii khic (1fap).Qua dd ta nfain thdy dia bdn kfau \'yc ndy cd rat nfaieu cdch tiep can thdng tin ve hdm ii biogas Neu phit huy dugc hit cic kinfa truyin thdng ndy, diy Id mdt dieu kfailn cfaiing tafaivgng vdo su phai trien ciia loai hinh xu ty chdt tfadi cfadn nufii Tuy nfailn, du bilt vl him ii biogas nhung ngudi din lgi khdng xay dyng vi vdn diu tu eao chilm khoing 57%, va kfaodng 11% kfafing dii \ai nudi Nfau vdy, cd thim bai kha ndng dl ed thi triln khai nhdn rdng hdm ii biogas d DBSCL: (i) giii quylt dugc van dl vdn ddu tu \a (ii) gidi quylt tinfa frgng tfaieu nguyen lieu ngp cfao ham li biogas Vdn dl (i) cd thi duoc gidi quylt thfing qua dinh hudng cho vay vdn ngdn hang tiir cdc ciq) cd thim quyen hoac tdi ttg tir cac td cfaiic fad ttg Riing vin Ss (ii)faiendang cd mdt sd nghiin ciiu khai thdc cdc logi nguyen lieu dia phuang cfao qua trinfa li pfadi fagp cac fadm ii biogas hd gia dinh d DBSCL (Ngujen Vd Cfadu Ngdn et ai, 2011,2012) Tap chi Kboa hgc Tnr&ng Dgi hgc Can Tho Phdn A • Klioa hgc Tu nbien Cong nghe va Moi Inrang- 28 (2013/ 80-85 ^•2.4 Nhu cdu xdy dung hdm u / lui u biogas cua cdc hg chdn nudi Khodng 71% hp din chua cd hdm u / ttii u biogas cd nhu cau xdy dyng vdi dilu kiln vdn ddu tu dudi 3.000.000 ddng, 29% cdn lgi ichdng xay dyng hdm li / tiii li biogas nfaung nlu dugc hd frg 50% vdn xay dyng tfal cdc hfi niy sl tham gia tmdng la kha nhieu va DBSCL la khu vyc cd tilm nang to ton ttong viec phdt trien he thfing him li / tui u Tuy nhien, dilu phu thufic vao sy phit trien fin dinfa vi bin vimg eiia nginh chan nufii, ciing nfau su quan tam dinh faudng va cac cfainfa sach fad ttg ciia nhi nuoc ndi cfaung va cfainfa quyen tiing dia phucmg ndi rieng Tir nfaiing kit qud khao sat, mpl sd kiin nghi giiip ddy mgnh ttien kfaai mdfainfabiogas tten diln rpng: Qco, 3lr • khong Hinh 6: Nhu cau xdy dung him ii / tui li ciia cac hp chua cd ham u biogas KET LUA.N VA DE XUAT Kit qua phdng van 100 hfi din co vd chua cd hdm li / tlii u biogas tai xi Thgnh Nhyt va xa Binh Nhi - huyin Go Cdng Tay, xa Dao Thgnh va xa My Phong - phd My Tho, tinh Tiin Giang cho thay: 100% hfi ddn su dyng biogas lam chdt dfit cam thay hai tdng vi giam dugc chi phi chit dot, tiit kilm thdi gian thu nhgt ciii Mdi nam hd su' dyng biogas tiet kilm trung binh 1.700.000^ 2.000.000 dfing cho chi phi chit ddt NhOng h0 din chua cd ham ii / tiil li chua co biln phip quan ly va xir Iy phu hgp ngudn phan thdi Dilu niy anh hufing din ngufin nudc sir dung cho sinh hogt vd san xudt, ddc bilt dfii voi nhimg cpng ddng ddn cu nfing thdn Chinh quyln cdc cdp can cd ke hogch gidi thilu cfing nghe biogas den ngudi din theo nfaiiu kenfa thfing tin ddc bilt td thfing qua bio ddi Tang cuong tuyln tmyen cae tgi ich vi ling dung eiia cfing nghe biogas cung nhu cic chuong frinh, chinh sich hfi trg ciia nha nudc va cdc td chirc trong, ngoai nudc den ngudi din de cap nhdt thdng tin kjp thdi vd chinh xac To chirc nhiing top huan luyen va hudng din nguoi ddn each sii dung, bao fri him li / tiii li ciing nhu each sir dung vi quan ly chit thdi sau li cd failu qua de tranh lang phi Tinh hinh dich benh cung anh hudng lon den sy phat frien ciia ham li / tiii ii do cin cd ki hogch phong chdng djch phii hgp Ddng thdi dja phuong can cd chinh sach hfi frg ngudi dan tiep tuc tai dan sau dich Gia ca xay dimg ham u qua cao so vdi thu nhdp ciia hd dan cQng la mfii quan tam ciia ngudi dan dd dia phuang nen cd cfainh sdch ho frg nhu tai trg mfit phan kinh phi hoac cho vay vdi Iai suat thap TAI LIEU THAM KHAO Hiu fait hg ddn chua co him li / tiii ii diu cd mong mufin xay dyng mfi hinh nhung cdn e ngai vl miic diu tu Bill Nguyen, 201I.Nguy co dich benh tir 80 trieu tan chat thii Tmy cap tgi trang web http://nongnghiep.vn/nongnghiepvn/72/2/20 /81584/Nguy-co-dich-benh-tu-80-trieu-tanchat-thai.aspx Tmy cap ngdy 02/10/2012 Florian Wieneke, 2005 Acceptance Analysis of New Technology for Sustainable Water Management and Sanitation - A Case Study of Operating Farm Households in tfae Mekong Delta Viet Nam Luan an tfit nghiep Tiln si Dgi hgc Bonn, 227p Nhu viy, nhiing lgi ich mi he thfing ham u / nil li biogas mang lgi cho nguoi din ciing nhu mdi Monre, 2012 Chat thai chan nufii giy nhilu benh Tmy cap tai trang web Hdm il / tlii ii biogas giiip xu ly chit thdi chan nudi cd hieu qua vd kinh te, ddng thoi ldn dyng dugc ning lugng tao Tuy nhiin cac loi ich cLia him li / till u biogas chua dupe khai thac frill dl hiu hit ngudi dan chi quan tam su dung ddt mi bd qua cdc phy pfaam khdc tir ham ii nhu nudc thii va biln thdi co the ti ngudn phan hiru co cho cdy trdng vi bd sung tfaiic dn nufii ci Tap chi Khoa hoc Tnr&ng Dai hoc Can Tho Pban A Kboa hoc Tu nhien Cdng nghi va Moi tru&ng- 28 (2013): 80-8 http://www.timihanhmoitmong.vn/19/400.tc ml Tmy cap 02/10/2012 Nguyin Quang Dung, 2011 Khdo sdt ngudi sur dyng sinh hgc 2010-2011 Chuong frinh sinh hpc cho nginh chin nudi Viet Nam 2007-2012, Ha Ndi, 43p Nguyin Thi Thiiy DuyIn vi Nguyin Thi Viet An, 2010 Khao sit hiln frang, tiim ning vd 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