Upload
do-vinh-loi
View
143
Download
0
Embed Size (px)
DESCRIPTION
quy trình công nghệ sử dụng vi sinh vật trong xử lý chất thải từ chế biến tôm, mực, cá, góp phần bảo vệ môi trường
Citation preview
7/14/2019 Cng ngh x l nc thi ch bin thu sn
1/7
Cng ngh xl nc thi Thy Sn- Ch bin Mc, Ch bin Tm *** Copyright 2012 by Getech, All right reserved. Xin ghi r ngun khi bn pht hnh li thng tin tti liu thuc bn quyn ca Getech.
GETEC
2012
X L NC THICH BIN THY SN CH BIN MC, TM
I. NGUN PHT SINH NC THI
1.1nh gi ngun thiCh bin thu sn l mt trong nhng ngnh pht sinh nhim nng vi thnh phn nc
thi ch yu nh sau:
Cht thi rn: Cc b phn mc, tm, thi b
Ha cht ty ra .
Cc cht nhim hu c.
Cht nhim Nit, Pht Pho.
c th la chn cng ngh x l ph hp, ta cn nh gi cc thnh phn nhim trn.
a. Cht thi rn
Cc b phn mc, tm thi b cn st b li cun theo dng thi. Khi vo trm x l,
cc cht rn c th lm nghn bm hay tc nght ng ng. Do vy, cn c loi b
bng cc thit b lc rc tinh v h thng ha l.
b. Du m
Trong nc thi ca Qu Cng ty tn ti lng du m nhiu, do nghnh ngh ch bin
ch yu l c. Nn cn p dng cng ngh tuyn ni vt du m.
c. Ha cht ty ra
T vic v sinh, ty ra my mc, thit b nh xng, mt lng ha cht s xm nhp
vo h thng x l thng qua nc thi. Cc cht ny c tnh n mn cao, lm gim tuith cng trnh. ng thi, y cng l mt trong nhng nguyn nhn hn ch s pht
trin ca vi sinh vt, lm cho cc cng on x l sinh hc khng th t hiu sut yu
cu.
Cht ty ra ch yu ca Qu Cng ty l x bng v Clo. Lng Clo d trong nc nh
hng ln n qu trnh x l, Clo s lm vi sinh sc ti v khng pht trin c, v th
loi Clo d l iu cn thit.
Cng ngh kh Clo d chng ti a ra l kt hp gia Cng ngh ui kh bng h
thng sc kh trong b iu ha vi thi gian lu 6 gi.
7/14/2019 Cng ngh x l nc thi ch bin thu sn
2/7
Cng ngh xl nc thi Thy Sn- Ch bin Mc, Ch bin Tm *** Copyright 2012 by Getech, All right reserved. Xin ghi r ngun khi bn pht hnh li thng tin tti liu thuc bn quyn ca Getech.
GETEC
2012
d. Cc cht nhim hu c Nc thi thy sn c hm lng cht nhim hu c (COD, BOD) cao do tip nhn
ngun protein v lipit t tm, c, s Cc cht nhim ny c ti lng ln, khi thivo nc sng s gy nhim nghim trng ngun tip nhn. Ph hy h sinh thi sng,
nh hng n v sinh y t cng ng.
Thnh phn nhim hu c ny c kh nng phn hy khi tip xc vi vi sinh vt (c
kh nng x l sinh hc cao), nht l cc chng chn lc. Do vy, bin php x l ph
hp l ng dng cng ngh x l sinh hc.
e. Cc cht nhim Nit, Pht pho
Trn bnh din sc kho Nit tn ti trong nc thi c th gy nn hiu ng v mi
trng. S c mt caNit trong nc thi c th gy ra nhiu nh hng xu n h
sinh thi v sc kho cng ng. Khi trong nc thi c nhiu Amnic c th gy ccho c v h ng vt thu sinh, lm gim lng xy ho tan trong nc. Khi hm lng
nit trong nc cao cng thm hm lng phtpho c th gy ph dng ngun tip
nhn lm nc c mu v mi kh chu c bit l lng xy ho tan trong nc gim
mnh gy ngt cho c v h sinh vt trong h.
1.2Thnh phn tnh cht nc thiThnh phn v tnh cht nhim c trng ca nc thi nh my c th hin trong bn sau:
Bng 1. Thnh phn v tnh cht nc thi
STT THNG S N V Gi Tru vo Gi tr u raQCVN 11:2008 - Ct A
1 pH - 6.46.6 6 -9
2 BOD5 mg/l 400 - 1000 30
3 COD mg/l 1000 - 2500 50
4 Tng cht rn l lng (TSS) mg/l 2000 - 3500 50
5 Tng Nit mg/l 120 - 200 30
6 Tng pht pho (P-PO4-) mg/l 20 - 40 6
7 Du m ng thc vt mg/l 10 - 60 10
8 Tng Cliforms MPN/100ml 109 3000
7/14/2019 Cng ngh x l nc thi ch bin thu sn
3/7
Cng ngh xl nc thi Thy Sn- Ch bin Mc, Ch bin Tm *** Copyright 2012 by Getech, All right reserved. Xin ghi r ngun khi bn pht hnh li thng tin tti liu thuc bn quyn ca Getech.
GETEC
2012
1.3Thng sthit k Thnh phn v tnh cht nhim c trng ca nc thi nh my c chng ti a ra
cng ngh ph hp, xl nc thi t chun.Cng sut : 300 m3/ngy m
Ti lng COD : 860 kgCOD/ngy
Ti lng BOD : 260 kgBOD/ngy
II. M T CNG NGH XL
2.1c im cng ngh xl Cng ngh xl nc thi ti Nh my ch bin Thy sn Trng Nhnbao gm h thng
x l: C hc, ha l, sinh hc.
H thng x l c thit k ph hp vi iu kin thc t ca nh my, m bo tiu chun
nc thi u ra t tiu chun loi A theo QCVN 11:2008 ca BTi Nguyn Mi Trng ban
hnh.
2.2S cng nghCng ngh x l nc thi c thit k ti u, x l ht cc cht bn trong nc thi
Thy sn. hiu r thm, vui lng coi bn v nh km.
7/14/2019 Cng ngh x l nc thi ch bin thu sn
4/7
Cng ngh xl nc thi Thy Sn- Ch bin Mc, Ch bin Tm *** Copyright 2012 by Getech, All right reserved. Xin ghi r ngun khi bn pht hnh li thng tin tti liu thuc bn quyn ca Getech.
GETEC
2012
Bm chm
Bn
d
Bn sau lng
Bn
tunhon
Nctunhon
Bn thi b
Ncsau
tch
bn
Dng kh
Ha ch t PAC
Ha ch t Polymer
Dng kh
Dng kh
Ho ch tChlorine
Lc rc tinh Ch t thi r n
Phn bn
B L ng Lamen 2 T07
B Sinh Hc Thi u Kh T05
B Sinh Hc Hiu Kh T06
B Kh Trng
Nc Thi u Rat QCVN 11:2008 Ct A
(Thi ra sng)
SN PHI BN T09Bn Lc p Lc
Nc thi t nh my
B To Bng T03
B iu Ha T01
B L ng Lamen 1 T04
B Keo T T02
7/14/2019 Cng ngh x l nc thi ch bin thu sn
5/7
Cng ngh xl nc thi Thy Sn- Ch bin Mc, Ch bin Tm *** Copyright 2012 by Getech, All right reserved. Xin ghi r ngun khi bn pht hnh li thng tin tti liu thuc bn quyn ca Getech.
GETEC
2012
2.3Thuyt minh cng ngh xlH thng x l chng ti thit k c cng sut thit k: 300m3/ngy m. Cng ngh v
thit k chng ti a ra c uim l: x l trit nc thi t nh my, h thng vnhnh n nh, t sc ti, chi ph vn hnh thp (in + ha cht), d vn hnh, t gy mi.
Thit k ny p dng cho nhiu cng trnh trn th gii, ti Vit Nam chng ti p
dng cho cng trnh x l nc thi v t hiu qucao. bit r v thit k chng ti
a ra, xin vui lng xem tip..
Nc thi t qu trnh sn xut theo h thng thu gom tp trung v h thng x l m
u tin l chy vo Biu ha (T01). Trc khi vo T01, nc thi chy qua thit b
lc rc tinh CS. Thit b c tc dng gi li cc cht rn c kch thc ln trong dng
thi, bo v cc my bm WP-01/02 ca B T01. Cc my bm ny hot ng lun
phin hay ng thi c nhim vbm nc thi ln B keo t (T02). Biu ha (T01)
c tc dng iu ho lu lng v nng nc thi. Trong b T01, khng kh c
cung cp thng qua h thng phn phi kh t di y b nhm xo trn u nc thi
v hn ch qu trnh ym kh xy ra (qu trnh ym kh pht sinh mi hi rt mnh). Mt
khc, ti b T02 c chc nng loi bClo d trong nc thi u vo bng cch lm
thong kh.
Ti B keo t(T02) nc thi c chm ha cht keo t PAC gom cc cn l lng
huyn ph trong nc thnh cc cn c kch thc ln hn. Nc ti B keo tc
khuy trn vi PAC bng mt gim tc c cnh khuy. Nc ti B keo t s chy trnsang B to bng (T03).
Ti B to bng (T03) nc thi c chm ha cht to bng Polymer keo cc cn l
lng kch thc nhtrong nc thnh cc cn c kch thc ln hn v d lng. Nc ti
B to bng c khuy trn vi Polymer bng mt gim tc c cnh khuy. Nc ti
B to bng s chy trn sang B lng lamen 1 (T04).
Ti b lng lamen 1 (T04), ti y s din ra qu trnh tch cn l lng ra khi nc nh
h thng tm lng vch nghing Lamen. Bn nc gom v trung tm b nhy c
dc ph hp. Ti y, ta lp t 01 bm bn SP-01 bm bn vSn phi bn (T09),
bn d c bm vSn phi bn (T09).
Nc ti T05 chy trn qua h thng B sinh hc thiu kh Anoxic (T05) v tip tc
chy trn qua B sinh hc Hiu KhOxic (T06). Qu trnh ny gi l qu trnh A/O 2
7/14/2019 Cng ngh x l nc thi ch bin thu sn
6/7
Cng ngh xl nc thi Thy Sn- Ch bin Mc, Ch bin Tm *** Copyright 2012 by Getech, All right reserved. Xin ghi r ngun khi bn pht hnh li thng tin tti liu thuc bn quyn ca Getech.
GETEC
2012
bc, kt hp gia x l sinh hc thiu kh v hiu kh. Ti h thng A/O, nc thi c
kh cht hu c, Nit, Pht pho, Sunfua rt hiu qu. Cng nghny p dng cho
nhiu cng trnh, nc sau x l n nh, t cht lng. Trong B T06 ta lp t 01bmWP-03 bm nc tun hon v B T05. Trong h thng b A/O, h vi sinh vt thiu
kh v hiu kh tn ti di dng bng bn l lng c vai tr chuyn ho cc cht hu c
thnh sn phm cui cng l CO2, H2O cung cp dng kh cho vi sinh hot ng
v duy tr trng thi l lng cho bn hot tnh, khng kh c cp vo b qua cc thit b
phn phi kh bt th v bt mn. Lng oxy ho tan trong bc tnh ton k.
Nc thi t T06 chy qua B lng Lamen 2 (T07), ti y s din ra qu trnh tch bn
hot tnh v nc thi x l nhh thng tm lng vch nghing Lamen. Bn c
gom v trung tm b nhy c dc ph hp. Ti y, ta lp t 01 bm bn SP0-2
bm bn tun ha v b T06, bn d c bm vSn phi bn T09.
T B lng lamen 2, nc thi c chy trn sang B kh trng (T08), v chng s
c kh trng bng dung dch chlorine m bo ch tiu vi sinh trc khi thi ra mi
trng. Ti ngn th 2 ca T08 c 02 bm ni WP-04/05 bm sang Bn lc p lc.
Nc thi sau xl t cc chtiu theo tiu chun QCVN 11-2008, ct A (thng s
u ra t theo bng 1tr ang 12 v13)v c dn vo cng thot.
Sn phi bn c trang b cc ng thu nc t di y, bn trn ph Ct, si h tr
tch bn. Bn sau 3 ngy c tch ht nc (khng cn trlng bng Polymer), v
gom nh k lm phn bn. Bn ny rt giu pht pho v dinh dng.2.4u im ca cng ngh xl chng ti a ra Xl nc thi t tiu chun theo yu cu.
Chim t din tch.
Vn hnh n gin, Tiu th ha cht t.
D lp t, d bo tr.
Cng ngh p dng x l thiu kh trc x l hiu kh nn gim khi tch cng trnh v
tit kim din tch mt bng.
Cng ngh A/O 02 giai on: Tit kim chi ph in do gim nng lng cung cp cho
qu trnh sc kh v x l bn ca b sinh hc.
7/14/2019 Cng ngh x l nc thi ch bin thu sn
7/7
Cng ngh xl nc thi Thy Sn- Ch bin Mc, Ch bin Tm *** Copyright 2012 by Getech, All right reserved. Xin ghi r ngun khi bn pht hnh li thng tin tti liu thuc bn quyn ca Getech.
GETEC
2012
Cng ngh A/O 02 giai on: c tnh linh ng cao trong vic iu chnh thng s hot
ng cho ph hp vi cc thay i ca nc thi. iu ny rt quan trng i vi thi
gian lu di khi lu lng nc thi c thtng ln. Cng ngh A/O 02 giai on: c khnng khNit v pht pho rt cao, gip nc thi
u ra t tiu chun.
Cng ngh A/O 02 giai on: hn ch s sc ti trng hu c ng k trong iu kin
nng nhim thay i t ngt trong thi gian ngn.
Slinh ng trong c ch vn hnh s gip h thng xl nc thi p ng yu cu x
l mt cch an ton m vn tit kim khi c thiu chnh cc ch chy khc nhau: c
ha cht, khng ha cht
Cc cng trnh hn chc mi hi pht sinh ra so vi cng nghkhc, m bo an
ton mi trng. Bn sau xl c em lm phn bn.