Dang T H6ng Phuong va Dig Tgp chf KHOA HQC & CONG NGH$ 95(07) 21 26 NGHIEN ClTU ANH HU''''OfNG CUA CHE DO SUC KHI DEN QUA TRINH XUT LY Nlf6C THAI CHAN NUOI LQN BANG PHU''''ONG PHAP SEQUENCING BATCH REATOR ([.]
Trang 1NGHIEN ClTU ANH HU'OfNG CUA C H E DO SUC KHI
DEN QUA T R I N H XUT LY Nlf6C THAI CHAN NUOI LQN
BANG PHU'ONG P H A P SEQUENCING BATCH R E A T O R (SBR)
D?ng Thj H6ng Phuong', Phgm Thj Hdi Thjnh', VD Thj Thu Hui'
'Tnrdng Dgi hgc Nong Idm - DH Thai Nguyen, Vi4n Khoa hgc Cong nghe Viet Nam
TOM TAT
Nghien cim anh hudng ciia chi dp sgc khf din qud trinh xu ly nudc thdi chSn nuoi Ipn sau qud che dp sgc khi khong dnh hudng nhilu din hi?u qud xii ly COD, d cd 3 che dp nghien cim, hipu gian thyc hi$n qud trinli nitrat hda trong mdt md thf nghidm Id 6 gid, hi^u qud oxy h6a amoni dgt qud xu 1^ COD, T-N cao vd In dinh nh^t
Tir khda: nu&c thdi chdn nuoi Ign, SBR, thiiu khi - hiiu khi
DAT VAN DE
Dgc frung ciia nudc thai chdn nudi thugc logi
gidu SS, COD, N, P Vi vay, dl xu ly nudc
thai chdn nudi, kT thuat yem khi ludn la su lira
chpn dau tien Tuy nhien, logi nudc thdi nay
rat khd xir ly, bdi vi ndng dg hiiu ca ciing nhu
nita trong nudc thai rat cao, neu chi xu ly
bdng cac qud frinh sinh hgc yim khi thudng
khdng friet de, vfin cdn mdt lugng ldn cac
chat hiiu ca, chii yeu la N, P Do vgy, sau qud
trinh xir ly yem khi, budc tiep theo Id qua
trinh sinh hgc hieu khi - thieu khi ket hgp
cudi ciing cd thl la budc xii ly bd sung nham
giam thieu tdi da thdnh phan dinh duang Mpt
trong cdc qua trinh hieu khi va thieu khi ca
ban thudng dugc nghien cdu dng dung nhilu
frong xu ly nudc thai chan nudi Ign do Id
phuang phap sequencing batch reator (SBR)
(biin hoat tfnh theo me)
Nghien cdu nay trinh bay mgt sd ket qud dat
dugc khi thay ddi che do syc khi din qua
trinh xu ly nudc thai chan nudi Ign sau xu ly
yem khi bdng phuang phap phdp SBR
NOI DUNG VA PHUONG PHAP
NGHIEN CUU
Boi tugng nghien cdu
Ddi tugng nudc thdi dugc chgn Id nudc thai
tir hg chan nudi Ign quy md nhd Nudc thdi
Idy tgi hd gia dinh chan nudi nhd le, d Gia
Lam (Ha Ngi) Hp gia dinh chdn nudi khodng
Email: hongphui
20 con Ign, rua chudng 3 lan/ngdy, vdo miia
he rda 4 lan/ngdy Lugng nudc diing khodng
1 , 5 - 2 mVngay, cd mgt bl Biogas vdi thl tich 7 m^, cd mpt be chdy tran 1,5 m^
Npi dung nghien ciru Ddnh gia anh hudng ciia che do sue khi (lien tuc, gian doan) hieu qud xu ly COD, N Phuong phap nghien cuu
- Phuang phap lay mdu: Lay mau theo TCVN 5999:1995
- Phuang phdp phan tich: Phdn tich COD, Amoni, Nitrat, Nitrit, tdng N, P theo QCVN hien hdnh
- Phucmg phdp thu thfip va xu ly sd lieu: Tiln hdnh theo doi hang ngay va ghi Igi cdc
sd lieu frong qua frinh ldm viec, xu Iy bdng Excel Tfnh toan cac thdng sd tai lugng COD, hieu sudt xd ly vd ty Ip C/N theo cac cdng thuc sau [I]
+ Tinh tai lugng COD, T-N: LCOD = Ccoovao (mg/L) * Qvio (L/ngay) / (V * 1000);
LT-N = CT-NV^O (mg/L) * Qv,o (L/ngay) / (V *
1000); vdi Q^io= Q (L/me) *2 (me/ngay)
+ Tinh hipu suit xd ly: COD, N H / , T-N:
H = (Cvao- Cra)*100/Cvao; Thdi gian luu:
T = V / Qvio + Tinh ty lp: C/N = CCODvao/Cj-N vao LcoD, LT-N : Tai lugng COD, N (kg/mV ngdy); Q: Luu lugng (5 L/me);
T: Thdi gian luu nudc thai (ngdy), V: The tich nudc trong bl phan ung SBR (20L)
Trang 2H: Hipu suit xu ly ( %); Cva,,: Nong
dp COD, N H / hodc T-N diu vao (mg/L)
Cr„; Nong dp COD, Nil.,' ho^c T-N diu ra
(mg/L); 1000: hp so quy doi
KET QUA NGI IlKN CUU VA T H A O LUAN
Thuc nghipm
Dac tnmg nin'rc thdi trong nghien ciru
Ddc trung ciia nudc thdi trong nghidn cuu
dugc the hipn trong Bdng 1:
BdngI; Ddc iruiig IUMC thdi chdn nudi ign sau xic
i: vim khi Ihio^asl [2]
pH
COD
N-NH,'
N-NO,'
Tong N
TongP
TSS
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
6,8 ' 7,4
450 - 800
246 - 460
0,5 - 4,4
250-463 5,6-10,4 1500-3000 Dac trung cua nudc thdi chan nudi Ign cd
chua chdt hiru ca cao, ham lugng amoni cao
va chat ran la lOmg tuang ddi cao Tuy nhien,
hdm lugng COD khdng cao nen phai bo sung
them ca chdt de tang COD cho phii hgp vdi
tnuc di^h t.ghien ;du
Mo hlnh thih bl thi nghidm
Cdi tgo hp thiit bj biin hogt tinh thanh hp thiet
bj SBR, ldm vipc gidn dogn nhu hinh 1
Cdc chS dp thi nghidm
- Chi dp I: Chi dg syc khi gidn dogn 1 chu
trinh, syc khI 8 gid, ldng 2 gid, xa 1 gid, khuay trgn 2 gid
Ca sd lya chgn chi dg i: Nudc thdi nghien
cuu cd d$c tinh hdm lugng N (amoni) cao nen chgn thdi gian syc khf k6o ddi de dam bdo qud trinh nitrat hda xdy ra hodn toan
- Chi dg 2: Che dp sgc khi gidn dogn 1 chu
trinh thyc hipn xu ly 5 \it/m6, bam vdo I
gid, khuay trgn 3 gid, syc khi 6 gid, Idng 1 gid, xd 1 gid
Ca sd chuyen td che dg thi nghifm 1 sang che
dg thi nghipm 2: Tdng thdi gian thieu khi de khd nitrat dd tgo ra
- Chi dg 3: La che dg syc khi gian dogn 2 chu trinh hilu khi - thilu khi, bam vdo 1 gid, khuiy trgn 1 gid (bdt diu cung liic bam vao), syc khf 3 gid, ldng 2 gid, khuiy frgn 1 gid, syc khi tiep 3 gid, lang 1 gid vd xd ! gid Luu lugng 51it/me
a
-Or
Bam nirdc thdi
khuay ^ Thiing
dyng nudc
Liru
lupng
kh[
£ 0
[p5n-I ORF [p5n-
I-Mdy thil khi
Mdy tfnh
m-^
Thiing chUa nudc S9ch
Trang 3Anh hudng cua chi dp sue khi den hieu qua xir Iy COD, N
Hieu qua xd' ly COD
Hieu qua xd ly COD tai cdc chi dp thi nghipm khac nhau thl hien tren hinh 2
• C O D vAo - C O D ra ^ Hi§u su^t xii 1^ C O D
2000
1600
1200
800
'^,j(AAs!i!^^^soi^,ai^ ^^£«aS '^ , ^ ^ A ^'^w^i^aJ^^'toOf'^^w^fAvA^AAi^^
- / • • • • • * / v V - * * " • • • • * • * * • ' > - ^
**
CDI CDI
,.^
CD 3
" ' '• 1 • 1 ' 1 ' 1
to 20 30 40 50 60
Th6i gian, ng&y
Hinh 2, Anh hu&ng cua che do sue khi din hiiu sudt xir ly COD
Chi dd sue khi dnh hudng khdng ldn din hieu suit xu ly COD d ca 3 che dp deu cho hieu suit
xd ly dat 85 - 90% va tuang doi dn dinh Nong dp dau ra thap, hau het trong khoang 150 mg/L (dgt QCVN40:2011/BTNMT, cot B) Tuy nhien chi do 3 van cho kit qua dn djnh hon ca
Hieu qud xu ly Nita
Hieu qud xir ly N-NHf
Anh hudng ciia thdi gian syc khi/ngdng syc khi den hieu suat sd ly NH4^ tuang ddi rd ret, the hien d hinh 3
• NH4-1- vAo 1 Hi§u suat x a 1^ N H 4 +
'- ^i"^ '^ / *
• • • • •
CDI
' • ' ^ > " - V i \ y > >
*•••*• *•
CD 2
>?»'''™^"»^'™.,^rf«MVl
^^
***.**• • " * • • *
CDS
• "r
8 0 v^
6 0 Z
4 0 ^
Th6'i g i a n , n g d y
Hinh 3 Anh hu&ng cUa chi do sue khi den hi^u qud xif ly NH4*
Trang 4- Tai che dp 2 va che dp 3, hi?u qud xir ly d^it tirang doi cao tren 90 - 99%, nong dp NHj* ra < 20 mg/L
Sir chuyen hoa NOi
Anh hirdng cua che dp syc khi den s\r chuyen h6a NO2' thi hi?n trSn hinh 4
100
80
f 60
8 40
20
0
0 10 20 30 40 50 60 70
Th6'i gian ngiy
Hinh 4 Anh hudng aia thdi gian sjjc khi/ngitng sue khi den su chuyen hda NOi Sir chuyen hoa NOi
Anh huong cua thoi gian sue khi/ngung sue khi dupfc th6 hipn 6 hinh 5
• N 0 2 - v&o
CDI
."
nT
•'^Th.V.rt.'wJhV.i*^ 1 >
• N O 2 - ra
CD 2 CD 3
« •
' • - • X - - ^ / - " - ' - '
• N03- vao • N03- ra
250
200
150
100
50
0
s •
•
•
GDI
ma
•
•
• •
CO 2
^ ^ ^ ^
•M,.T 1
CD 3
• • ^ V - * * - * * - ' ^ , ^
30 40 50
Thtri gian, ng&y
Hlnh 5 Anh hudng cua Ihdi gian sue khi/ngimg siic khi den sif chuyin hoa
N03-Anh huang cua thoi gian syc khi/ngimg sue khi khi ro rpt den qua trinh chuyin hoa Nitrat Thdi
gian ngimg syc khi it thi qua trinh khCr nitrat khong dii de thyrc hien hit, vi the tji che dO 1 NO3"
dau ra tuong doi cao Tuy nhien d8n che dp 2, 3 thi v6i thdi gian ngirng syc khi 18n toi 6 gid thi
Trang 5Hieu qua xir ly T-N
600
500
400
t
^ 300
200
too
0
(
• T-N v^o, mg/l - T-N ra, m&a A Hi^u su^t XLT y- T-N, %
* ' ^ A A^toew ^ ^ ^ ^ ^
) 10 20 30 40 50 60 70 8
Th6i gian, ng&y
100.0 80.0
N-60.0 1
40.0 "1
20.0 * 0.0
0
Hlnh 6 Anh hu&ng ciia che dg
Tai chi dp 1 thi hi?u su4t ciia h§ thdng chi dgt
khoang 20 - 30%, tdi chi dp 2 thi hieu suat
da len tdi khdang 70% Va sang che dp 3 thi
hi?u suit xu ly TN da dgt tdi khoang 75
-80% Nhu vgy cd thl nhgn thSy, ty 1| thdi
gian syc khi va ngdng syc khi la I : 1, va
trong mpt me thi nghiem xay ra hai chu trinh
thieu khi - hieu khf la dgt hieu qua xd Iy nita
cao nhit
KET LUAN
- Che dp sue khi khdng anh hudng nhieu din
hieu qua xd ly COD, d ca 3 chi dp nghien
cuu, hieu qua xd ly COD tuang ddi cao, dgt
khoang 90%
Thdi gian th\rc hi?n qua trinh nitrat hda
trong mdt me thi nghiem 12 gid la 6 gid,
hieu qua oxy hda amoni dat trong khoang
90 - 99%
si^c khi den hiiu qud xit /)5 T-N
- Hi?u qua xd Iy T-N tai che do thdi gian sue
khi 6 gid/I me 12 gid bao gdm hai chu trinh thieu khf - hieu khf la cao nhat, dat han 80%
- Ket qua nghien cuu nay cho thay che dp sue khi 6 gid/I me, 1 me la 12 gid, gdm hai chu trinh thieu khf - hieu khi cho hieu qua xu Iy COD, T-N cao va dn dinh nhat
TAI LIEU THAM K H A O
[1] Luong Due Phlm (2002), Gido trinh cdng ngh4 xu ly nu&c thdi bdng bi^n phdp sinh hgc,
Nh& xudt bin Gido due, Ha N5i [2] Le Cong Nhit Phuong (2007), Nghien ciiu Uiln khai iing dung xd Iy ammonium trong nudc dudng sinh khdi c6 nhdm vi khuan Anammox [3] Nguyen HiJu Trung (2010), Bio cdo de tdi cap
CO sd chpn lgc Vien Cdng nghe moi trudng
"Nghign cihi xir l^ ddng thdi thdnh phan hihi co vd
dmh dudng trong nudc thdi chdn nudi Ign bdng phuong phdp SBR"
Trang 6SUMMARY
STUDY ON THE EFFECT OF REGIME AERATION PROCESS
TO PIG LIVESTOC K WASTE WATER TREATMENT PROCESS
AFTER ANAERATION TREATMENT BY SBR
Dang Thi Hong Phuong'', Pham Thi Hai Thinh^ Vu Thi Thu Hue'
'College of Agriculture and Forestry - TNU,
^Vietnam Institute of.Science and Technology
To study the effect of aeration mode to the wastewater treatment process for pig breeding process
afiter process treatment anaerobic by means of SBR (Sequencing Batch Reactor) indicated that
aeration mode did not affect to the COD removal efficiency, in all 3 research modes COD removal efficiency is relatively high, reaching about 90% Time for the nitrification performance
of the tests is 12 hours However, the effect of this stage is 6 hours Ammonium oxidation efficiency reached in about 90-99%, Aeration mode 6 hours for one batch, a batch of 12 hours which includes luo anoxic cycles- the aerobic showed high efficiency and stable with COD and T-N
Keyword: pig livestock wa.\iL' waler, SBR, anaerobic - aerobic
Ngdy nhdn bdi: 28/6/2012, ngdy phdn bien-20/7/2012, ngdy duy^t ddng:27/7/2012