Nghien CLFU cong nghe tich hap hoa ly - sinh hpc XLF ly niFac ri rac tren cc s a mo hinh so
Ngay nhan bai: 10/12/2013 Ngay sij-a bai: 18/12/2013 Ngay cliap nhan dang: 28/12/2013
T O M TAT:
Nilcrc ri rac tai cac bai chon lap chat thai ran dang ]a v&n de bt(c xiic can dilpc giai quyet.
Thanh phan nilcic ri rac gom cac hop chat hflu ccS, COD, BOD^, NH^*, tong N, tong P, do mau, do Id^'m, ]dm loai nang, SS,... vcii nong dp rat cao. Dg xfl ly nfldc ri rac hieu qua, each tiep can d day la sfl dung cong nghe tich hpp hda ly - sinh hoc. Trong bai bao nay trinh bay nhflng ket qua mo phong cong nghe tich hop hoa ly - sinh hoc de xfl ly nfldc ri rac tren cO s6 mo hinh. Nhom cong nghe dau tien trong day chuyen xfl ly la cong nghe hoa ly (keo tu, ket tua hoa hpc bac 1, ket tua hoa hpc bac 2, ket hop OJUV). Giai doan hai xfl ly bang sinh hpc dfla tren cong nghe AAO. Ket qua mo phong bang phSn mem Biowin cho thay hieu suat xfl ly COD dat 89%; CBOD3 dat 95%; NH^*-N dat 92%; tong photpho dat 33%; tong nito dat 47%. Nhfl vay, sau khi xfl ly qua cong nghe tich hpp hoa ly - sinh hoc, tong hieu suat xfl ly v6i BOD3 la 95%, hieu suat xfl ly NH,*-N la 98 %, hieu suSt xfl ly COD la 96%, hieu suat xfl ly tong nitc* la 96%, hieu suat xfl ly TP la 97%, hi?u suat xfl ly cac ion kim loai dat 85%, va dp mau sau xfl ly dat hieu suat len den 99%, nfldc sau xfl ly dat quy chuan thai QCVN 25:2009/BTNMT. cot B2.
Tfl khoa: xfl ly nfldc ri rac, cong nghe tich hcfp hda ly - sinh hpc, mo phdng cong nghe hda ly - sinh hpc
ABSTRACT
Landfill leachate is a big problem that needs to be solved. The composition of landfill leachate contains organic compounds, COD, BOD^, NH^*, TN, TP, color, alkalinity heavy metals, SS,... at very high concentration. For effective treatment of landfill leachate, the approach is to apply of the integrated physiochemical-biological technology. In this paper, the simulation results of integrated physiochemical - biological technology for treatment of landfill leachate, which is based numerical model, is presented. The first technology group of treatment scheme is physio-chemical processes (coagiUation, 1st chemical precipitation, 2nd chemical precipitation of amoni combining with advanced oxidation processes O3/UV). Then the AAO biological technology was applied. The simulation results by running Biovrin code was used for calculation parameters of this AAO technology. It showed that the removal eflSciencies of COD, CBOD, NH,*-N, TP can reach 89%, 95%, 92%, 33% and 47%, recpectively; With the treatment scheme of physiochemical-AAO biological processes, the removal efficiencies gained such as: 95%
of BOD5,98% of NH^+-N, 96% of COD, 96% of TN, 97% of TP, 85% of heavy metals and 99% of color, respectively. The effluent is satisfied the permit values of QCVN 25:2009/
BTNIVIT, grade B2.
Nguyen Duy Thinh, Dang Xuan Hien
Vi^n Khoa hoc va Cong nghe moi trfldng - Trfldng Dai hgc Bach khoa Ha Npi
Nguyen Duy Thanh, Dang Xuan Hien
1. M d d a u
Nong So ncrdc rac dau v i o co k h o i n g dao dong rat I6n, mpt so yeu to 6 nhiem co lien quan true tiep can xfl ly nhfl: cic hpp chat hflu CO, tong nita, do kiem, phopho, kim loai nang... rat cao. De xfl ly cic chat niy, tren quan diem cong nghe, cong nghe tich hpp hoa ly - sinh hpc thi moi giai doan xfl ly deu co nhOrng Liu diem va nhctpc diem rieng. Khi xflly rieng re, nhflng nhupc diem n i y se boc Ip va hieu q u i cua q u i trinh xfl ly se bj ban che. Nhung neu thiet lap duoc mpt quy trinh cong nghe phoi hop hoa ly - sinh hpc thi cic Uu diem cfla cic cong nghe rieng re se dupc bo sung cho nhau va cic nhupc diem se bj g i i m , l i m tang hieu q u i xfl ly. VI viy, viec thUc hien de tai: "Nghien cflu cong nghe tich hpp boa ly - sinh hoc xfl ly nucrc ri ric tren co sd mo hinh", nham dua ra mpt g i i i p h i p toi Uu ve mat cong nghe (xfl ly cac chat hflu co kho phan buy sinh hpc v i hpp chat nitp, COD, BOD) la van de can thiet.
2. Ndi d u n g , p h u o n g phap nghien ciiTu va CO sd ly t h u y e t m o hinh Biowin
2 . 1 . Noi d u n g nghien curu
- Phan tich d i n h g i i hieu q u i cong nghe hoa ly flng dung trong xfl ly nudc ri rac mdi va nudc ri rac cu.
- Qng dung mo hinh Biowin tinh t o i n mo phong va nghien cflu hieu q u i cong nghe AAO trong xfl ly sinh hpc nudc ri ric.
2.2. PhUoing p h a p nghien cilu:
- Thu thap thong tin, tai lieu da dupc cong bo, tong hpp c i c sd lieu thu thap duoc.
- Nghien cflu tong quan c i c cong nghe xfl ly nudc ri rac, d i e biet l i q u i trinh xfl ly bang phuong phap hda l y v i sinh hoc.
- O i n h g i i hieu q u i xfl ly cua cong nghe hda ly; tinh t o i n mo phdng cic q u i trinh xfl ly nudc r i c bang cong nghe sinh hpc AAO dfla tren phan mem Biowin.
2.3. Cc sd ly t h u y e t m o h i n h m o p h o n g Biowin
Biowin la mpt chflong trinh mo phdng tren may tinh dflpc Cong ty tU van moi trfldng Envirosim - Canada nghien cflu va p h i t trien, de md phdng v i tinh t o i n tdi Uu hda cho cic
01.2014 BWniEPfll 1 2 7
he thong xfl ly nudc thai.
BioWin dupc thiet ke dua tren c i c tieu chuan cong nghiep, tich hpp cic mo hinh dpng hpc cho qua trinh biin boat tinh ASMl, ASM2, ASM2d...
dupc hiep hpi nudc quoc te phat trien va Ung dung, vdi 2 lUa chpn: Mo phdng he thdng d che dp on dinh va mo phdng dpng hpc.
Trong cong trinh nghien cflu niy, d i lua chpn mo hinh bCin hoat tinh ASM2d v i phan mem mo hinh Biowin Se mo phong cong nghe AAO.
2.4. Mo hinh bun hoat tinh ASM2d 2.4.1. Hi so ty IUdng cda ASM2d
He sd ty lupng cCia ASM2d dupc tinh dua tren ba thanh phan b i o toan cho COD, dien tich va Nita. ASM2 va ASM2d bo sung vao them t h i n h phan photpho.
Cong thflc bao t o i n tdng qua cd the ap dung phij hpp cho tat c i c i c q u i trinh j va chat c dupc viet [5]:
Zv, ie,=0
d d i y : v , - h e s d t y lupng cua cau t f l thfl i d qua trinh t h f l j [ M M j ' ] ; i j ^ - he sd chuyen doi de chuyen ddi don vj cua t h i n h phan I sang don vj cua chat c [MM^'].
2.4.2. Bdng hoc cua ASM2d [5]
Bleu thflc dpng hpc cua ASM2d dUa tren sU chuyen doi boat dpng (hyperbolic) hay bao hda, hay la bieu thflc dang phuong trinh IVlonod, S/
(K-i-S) cho tat c i thanh phan hda tan dupc sfldung.
1. Q u i trinh thCiy phan:
Thuy phan hieu khi;
^ s / ^ H K02 + S02 Kx + " S / X H Thuy p h i n thieu khi:
r2 = Kh.TiNo ^°' ^""^ ' " " ' " " -XH
^ K o 2 + So2 KNOJ + SNOJ K X - F X S / X H Thuy phan yem khi:
X S / X H
Kh-1fe
K, 0 2 ^N0 3 I^OT + S n , i^NO, + S N •302 "^NOs 2 . V S V d j d u d n g , khCir n i t r a t : X „ P h i t t r i e n r e n c h a t l e n m e n , Sp:
S o , Sp Si U = H H
X S / X H Kx + X S / X H
^ 0 2 JNH4
K02 + S02 Kp + Sp Sp-H SA I ^ N H 4 + S N H 4 Spo4 SALK
Kp-FSp( KALK +SALK
Phit trien tren san phi'm len men S^
SA SA S^H fs = HH
KA + SA S p - t - S ^ KI,JH4-1-SN Sp04 SALK „ K p + S p o 4 K A L K + S A L K K h f l n i t r a t v d i CO c h a t l e n m e n S •
K r6 — I^H-riNO
Sp
02 Kw
1^02 + S02 KfgOg + 5(^03 Kp + Sp
^ N H i S p o , SALK ^ SF + SA K N H 4 + S N H , Kp-I-Spo, K A L K + S A I XH Khfl nitrat vdi sin pham len men S,^:
ta-lNo, SA
K02 + S02 K^oj + Sfj03 i^A + SA
Sp + SA K N H 4 + S N Q u i trinh len men:
Kp-t-Spi KALK + S A K
re = qf« Oz Phin giai:
r„=b„.X„
K02 + S02 KNO3 + SNO3 Kp-F Sp • K A L K + S A I
-'ALK 3 . V i s i n h v a t t i c h l u y p h o t p h o : X, Tich luy cua Xp„„:
SA rio — IPHA • „ . c
KA + OA Tich luy hieu khi cua X„.
So,
•11 — Qpp
Xpp/Xp, KALK +SALK Kpp -I- Xp
Spo4 SALK 7Xp, .XpAO
Xl
•02 PHA /XpAO
K n , -I- S, Ki
+s,
X M A X
4 K A L K + S A L K Xpp /XpAO ^ KpHA +XpHA/XpAO Kpp -h KM
Tich luy thieu khi cua X^^:
- Xpp/Xp,
K ru — rii.r|fj03 02
K N O , + Sw Phit trien hieu khi cua X „
IPAO
K n , + SO 4 + S N H 4 Kpc-hSp, i/Xp,
K A L K + S A L K KpHA + X P H A / X P , Phat trien thieu khi cua X..:
ri4 — ri3.rif,j03 . Phan g i i i cua Xp,^J,:
ri5 = bpAo • XpAo • Phin g i i i cua X^^:
fie = bpp.X]
0 2
. + SN
K ; MLK SALK
+ S A
KAI.K + S , ALK SALK Phan g i i i cua Xp„,
ri7 = bpHA-XpHA-"^^ TT KALK T ^ A L K 4. VSV t u dudng, nitrat hoa: X P h a t t h e n h i e u k h i c u a X,^^:
riB
_ S02 SNH4
— I^AUT • K „ 02 + S02 KNHA+SW Kp-I-Spi KALK +SA:
Phan g i i i cua X^^^^:
r =h X 19 AUT AUT
5. Mo t i ket tija ciJa phdt pho vdi sat III hydroxyt K e t t u a :
. —c Y 20 PCM MeOH Ra k e t t u a :
" • X A I
rii •
KALK + ^ A L K
2.5. Hieu chinh va danh gia tinh tuong hop cua md hinh Biowin Phan mem Biowin da dupc kiem tra vdi c i c dieu kien hpi tu, tdc dp hoi tu, da kiem tra vdi c i c trudng hpp cd nghiem g i i i tich v i mdt sd trfldng hpp rieng. D i e biet phan mem m d hinh Biowin da duoc kiem tra tren thuc te vdi c i c q u i trinh tong hpp md phdng vdi c i c sd lieu thUc nghiem cua mpt so nha may nhU nha m i y xfl ly nUdc t h i i Kim Lien. DUdi day la ket q u i kiem tra tinh tuong hpp gifla ket qua md phdng bang phan mem Biowin vdi ket q u i xfl ly thuc te bang cdng nghe AAO cfla n h i m i y XLNT Kim Lien.
Theo sd lieu dupc cung cap t f l N h i may x f l ly nudc t h i i Kim Lien thi n d n g d p D O t r o n g be yem khidao dpng trong k h o i n g 0,03-rO.II mg/lva trong be thieu khi la 0,10 -^ 0,25 mg/l. G i i trj DO trong be yim khi Suae lUa chpn la 0,07 mg/l v i DO trong be thieu khi la 0,18 mg/l, trong dieu kign nhiet dp 20°C de danh gia tinh tUPng hpp cua md hinh.
•|28|BWnffi[lSi% 01.2014
Bing 2 . 1 . So s i n h g i i trj md phdng van hanh cua n h i m i y va chat lupng nudc sau x f l l y
Chitieu C O D "
TSS T - P "
NH.*-N T-N' " "
It
mg/l 1 mg/l T
mg/l mg/l
Gia trj md phdng \ 16,9
6,5
5,4 ^ 1 1,4
26,3
Gia tri do 17,2
6,0 3,8 2,0 24,6 Ket q u i md phdng trang t h i i van hanh dn djnh cfla nha may trong dieu kien 20°C cho thay ndng dp NH4-f trong chat Iflpng nfldc dau ra k h i thap. Cung vdi sfl g i i m ndng dp NH4-I- qua cic be thi ndng do cua cua nitrat tang dan. Thanh phan TSS k h i dn djnh qua 3 be p h i n flng, dao dpng t f l 1821 •;-1852 mgTSS/l.
3 0 - 25 • 20 - 15 • 10 • 5 •
c
y
flh
f '^ '^^^ '^
'// Gia t r i mo phong
— • Gia t r i do
Hinh 2.1. So sanh gia trj mo phong cOa phan mem Biowin va l<et qu3 phan tich chat li/cmg nirdc sau xi3 ly cua nha may xSly nufc thai Kim Lien
Ket q u i md phdng trang t h i i van hanh dn djnh trong dieu kien 20°C cho thay sfltflOng ddng gifla ket q u i md phdng trang t h i i van h i n h dn djnh cfla cdng nghe vdi ket qua p h i n tich nudc sau xfl ly cua n h i m i y Md hinh Biowin hoan toan thich hpp de md phdng trang t h i i on djnh cua cdng nghe xfl ly nfldc t h i i ndi chung va cdng nghe xfl ly nudc ri r i c ndi rieng trong cac dieu kien khic nhau.
S.K^TQUANGHIENCUTU 3.1.Thu thap sd lieu
Bing 3. I.Thanh phan ban dau cua nfldc rac [2]
TT 1 2 "
~ 3 "
4 5 6 7
<?
10 11
J2_
13 Chitieu
pH COD T d n g N TdngP Od kiem
Mg^*
NH4*-N D d m a u BODs
Zrf*
Mn=*
Ni'*
Tdnq Fe
Don v j
mgOi/l mg/l mg/l mg/l mg/l mg/l ; Pt-Co mg02/l
mg/l mg/l mg/l mg/l
Ndng do
NUdc rac cu NUdc rac mdi 6,7
3400 1250,0
25,0 • 4890
220,0 1190,0 4620
520 10,5 9,2 2,2 80,0
6,3 10500 1870,0 52,0 4030 390,0 760,0 3240
" 4 8 5 0 "^
20,5 19,1 5J 174,0 3.2. Phan tich hieu suSt xCf ly hoa ly
- Hieu suat sau keo t u : xfl ly mdt phan c i c chat hflu co vdi hieu s u i t xfl ly sau keo t u COD: 56%, tdng N: 35%, tdng P: 70%, TSS: 85%, dp mau:
55%,BOD5:55%[1].
- Hieu suat sau ket tfla hda hpc 1: nudc sau n g i n lang cua q u i trinh keo tu duoc dfla vao xfl ly hda hpc b i c 1 d pH thap (6-7) vdi muc dich
loai bd cac ion kim loai Mg'*: Zn'*; Mn'*; Ni'*; tdng Fe ....vdi hieu suat tren 75% [3].
- Ket tua hda hpc 2: phuong p h i p xfl ly la ket tua d dang magie ammonium phosphate (MAP), bd sung MgClj.6HjO v i Na^HPO^.12Hp vdi ty" le Mg:NH,:PO, la 1:1:1 tai pH 8,5-9. Hieu q u i cua q u i trinh n i y dat hieu s u i t vdi COD: 65%; tdng N: 90%, tong P: 70%, dp kiem: 55%, TSS: 20 %, dp m i u : 55%, BOD^: 60% [3].
- Hieu s u i t sau O3/UV: muc dich cCia q u i trinh xfl ly n i y l i be gay cic lien ket cao phan t f l cua cic hpp chat hUu co, giup chung cd k h i nang phan buy sinh hpc tdt ban, tao dieu kien t h u i n Ipi cho qua trinh xfl ly sinh hpc tiep theo. Q u i trinh O^/UV loai bd dupc mot phan cac chat hflu co vdi hieu s u i t xfl ly dat COD: 60%, tdng N: 20%, tdng P: 10%,, BOD^: 75%; q u i trinh n i y loai bd dp mau trong nudc ric vdi hieu suit loai bd dp mau len den 96% [4].
3.3.Md phdng qua trinh xijr ly sinh hoc biing cdng nghe AAO Lua chpn luu lupng nudc ri r i c can xfl ly Qj|=30mVngay.dem; d nhiet dp trung binh 20°C vdi ndng dp DO tdi Uu trong be yem khi 0 mg/l, DO trong be thieu khi la 0,25 mg/l va DO trong be hieu khi dat g i i trj trung binh 2 mg/l, ap dung cho c i 2 trudng hop md phdng xfl ly nUdc r i c cu v i nudc rac mdi.
Cau hinh qua trinh xfl 1^ sinh hpc bSng cdng nghe AAO dupc thiet lap cho phij hpp vdi so dd cdng nghe tren phan mem mo hinh Biowin nhu hinh 3.1:
Hinh 3.1. Cau hinh mo phong cong nghe AAO bang phan mem Biowin
Q u i trinh xfl ly sinh hpc dflpc md phdng bang phan mem Biowin dfla tren md hinh bun boat tinh ASM2d trong q u i trinh xfl ly nfldc r i c bang cdng nghe AAO, ket q u i nhu sau:
- Ddi vdi nudc r i c cu:
Sau xfl ly hda ly, nUdc r i c cu dupc xfl ly b i n g qua trinh oxy hda nang cao (O3/UV), tiep theo dupc xfl ly bang cdng nghe AAO. Ket q u i md phdng nhu sau:
Hinh 3.2. Dien bien NH,* -N qua cac be xur ly Hinh 3.3. Dien bien Tong nitoqua cac be xur ly T f l q u i trinh md phong (Hinh 3.2) tren cho thay nong dp NH,* -N g i i m nhanh qua c i c be kj khi v i thieu khi, ndng dp tdng nito cung g i i m rd ret khi qua be hieu khi (Hinh 3.3). Cung vdi sfl g i i m ndng dp NH,* -N qua c i c be tbi ndng dp cfla NOj- -N tang dan. Phan NO3" -N cdn lai la do q u i trinh hdi luu mdt phan ddng da dupc Nitrat hda ve be thieu khi. Ndng dp Nitrite sau xfl ly l i 46,3 mg/l. Tupng tfl, vdi tdng nito sau xfl ly la 52,3 mg/l dat chi tieu xa t h i i theo QCVN 25:2009/BTNMT cpt B2.
oi.2oi4BiDnfi:[|9X 1 2 s
4^
-
¥
1
Hinh 3.4. Dien bien COD qua cac be xijr ly Hinh 3.5. Dien bien BOD qua cac be x i ly Tfl dd thi cho thay BOD va COD bat dau g i i m t f l be thieu khi, g i i m nhieu n h i t d be hieu khi, do cac hpp chat hydrat cacbon bj phan huy hieu khi chu yeu d be nay theo phuang tnnh
C^H^Oz^ + Oj — CO, -I- H,0 -I- NH3 + AH
NH,*-N dupc xfl ly hieu qua tai be yem khi sau dd qua be thieu khi cung dupc xfl ly k h i tdt va hieu suit g i i m dan khi qua be thieu khi v i hieu k h i , tuong tu, ndng dp cic chat nhu tdng photpho, TSS g i i m manh dat hieu suit tren 70-90%.
Ket q u i md phdng cho thay viec i p dung cdng nghe AAO trong xfl ly nudc ri r i c cu cho hieu q u i cao, nhu hieu s u i t xfl ly c i c chi tieu COD tren 89%; vdi BOD dupc loai bd 95%; NH/-N g i i m tren 92%; tdng photpho tren 33%.
- Odi vdi nudc ric mdi:
Tuong t u nhu nudc rac cu, nUdc rac mdi sau khi xfl ly hda ly, dupc xfl ly b i n g qua trtnh oxy hoa nang cao (O3/UV), tiep theo dUpc xfl ly bang cdng nghe AAO. Ket qua md phdng nhu sau:
Hinh 3.6. Dien bien NH,*-N qua cac be xil ly Hinh 3.7. Dien bien tong nito qua cac be xur ly Cung nhu ket q u i xfl ly nudc r i c cu, ket q u i md phdng xfl ly nudc rac mdi cho thay ndng dp tdng N, COD, CBOD qua cic be yem khi', thieu khi giam nhe nhung den be hieu khi ndng dp cac chat dupc xfl ly vdi hieu suit cao (Hinh 3.7; 3.8; 3.9).
ill
•'••\
X
T -
I
- - T
E3 - ---•5
°
Hinh 3.8. Dien bien COD qua cac be xur ly Hinh 3.9. Dien bien BOD qua cac be xur ly Qua xfl ly sinh hpc, c i c chat sau xfl ly giam rd ret nhu NH,* -N sau xfl ly cdn 1,18 mg/l, hieu s u i t xfl ly tong nitP: 47%. TUPng tU, COD v i BOD cung dupc xfl ly dat hieu q u i cao vdi hieu suat tren 90%, nudc r i c ban dau cd ndng dp COD l i 515,1 mg/l, sau khi xfl ly chi cdn 38,6 mg/l.
Tfl ket q u i md phdng cho t h i y , hieu suat xfl ly NH,*-N dat 95%, trong khi dd tdng nito sau xfl ly la 52,9 mg/l.
Nhfl vay, qua c i c kich b i n hieu q u i xfl ly COD, BODS, NH,*-N, tdng nito v i cac chi't hflu co khic thi cdng nghe AAO flng dung cho xfl ly nudc r i c dat hieu q u i xfl ly cao, d i e biet la COD, BOD^, NH,*-N.
Tfl ket q u i phan tich v i md phdng q u i trinh xfl ly cdng nghe tich hpp hda ly - sinh hpc ndng dp cic chat d nhiem g i i m rd ret, dat tieu ehui'n x i t h i i ra mdi trfldng:
B i n g 3.2. Ndng dp cic chat sau xfl ly
TT
1 2"
3 4 5"
6 7 8 9 10 11 --^2 13
Chitieu
pH COD l o n g N Tdng P Od kiem
Mg'*
NH4* - N O d m a u BOD5
Zn'*
Mn'*
Ni'* ^ Tdng Fe
1
Born v i r
• 1 mg02/l
-
mg/l mg/l mg/l ' mg/l : mg/l i Pt-Co mg02/l 1
mg/l mg/l mg/l 1 mg/l
Ndng dd Nudc rac
cu
NUdc rac mdi 8,4 8,4 18,4 38,5 52,3
4,1 1974,2
52,9 5,3 1533,8 33,0 58,5
1,2 140,3
4,2 1,5 1,3
1,1 131,2
5,1 3,0 2,8 0,3 ! 0,7 12,0 26,1
QCVN (25:2009 vi40:2011)cdt
82
5,5-9 300 '
60 6
25 150 50
3 1 0,5 5 4. K£T LUAN
Ket qua thu dflpc vdi d i y chuyen xfl ly gdm: Keo tu —> ket tua hda hoc 1 —> ket tua hda hpc 2 —> xfl ly b i n g Oj/UV —• xfl ly bang cdng nghe AAO thi hieu s u i t sau xfl ly vdi BOD^.: 95%; COD: 96%; tdng ni tfl: 96%; NH/-N:
98 %; tdng photpho: 97%; TSS: 93%, dp kiem: 60% va c i c kim loai dupc xfl ly tren 85% hoan toan dap flng dflpc yeu c i u ve chat lupng nudc sau xfl ly theo QCVN (25:2009 v i 40:2011) cdt B2, dac biet l i dp m i u sau xil ly dat hieu suat len den 99% (140,3 Pt-Co). Nhflvay vdi cdng nghe tren hoan t o i n flng dung vao thflc te de xfl ly nudc ri r i c cu v i nudc ri r i c mdi vdi cac chat cd ndng dp d n h i l m cao.
TAI LI|U THAM KHAO
[1 ] Le Van Cat (2007), Xur ly nudc thai giau hop eha't nito va photpho. Nha xat bin Khoa hoc tir nhien va Cong nghe Ha Npi.
[2] fiang Xuan Hien (2012), de tai nghien cilu cap nha nudc KC.08.05:"Nghien cilu xay dung cong nghe tkh hdp hoa ly - sinh hoc thich ilng, hieu qui an toan va be vOng vdi moi trudng sinh thai Je xir ly nUdc ric tai bai chon lap tap trung", Vien Khoa hoc vi Cong nghe moi trudng - fiai hoc Bach khoa Ha Npi.
[3] S. E. iorgensen and R. A.Vollenweider (1998). Guidelines of lake management [4] Paulina JEUONEK, Ewa NEQAJ (2012). The use of Advanced Oxidation Processes (AGP) for the treatment of landfill leachate
[5] Mogens Henze, Vfllli Gujer, Takashi Mino, Mark van Loosdrecht (2002). Aci ..ued sludge models ASMl, A5M2, ASM2d, and ASM3 - Edited by IVifA group on mathematical „ lellinq for design and operation of biological wastewater treatmen, IWA Publishing, London Si. IH CQS-UK
