Kev daws rau Starch Wastewater Treatment of Nplej
Lub ntiaj teb kev lag luam loj ntawm cov hmoov nplej hmoov nplej yuav tsum muaj kwv yees li 74.9 billion yuan (kwv yees li 1.05 billion US dollars) hauv 2024, thiab tau kwv yees tias yuav nce mus rau 88.5 billion yuan los ntawm 2030, nrog rau kev loj hlob txhua xyoo (CAGR) ntawm 2.82% nyob rau lub sijhawm no. Asia yog thaj av noj loj, thiab Tuam Tshoj tuav txoj haujlwm tseem ceeb hauv kev tsim khoom thoob ntiaj teb, suav txog 58% ntawm tag nrho cov khoom tsim tawm thoob ntiaj teb.
I. Txheej txheem cej luam ntawm cov neeg siv khoom rau kev kho cov hmoov nplej hmoov nplej
Thaum lub sij hawm tsim cov nplej hmoov txhuv nplej siab, ib tug loj npaum li cas ntawm cov concentrated organic wastewater yog generated, feem ntau yog los ntawm lub supernatant ntawm lub sedimentation tank thiab cov daj cawv ua los ntawm centrifugation. Cov dej khib nyiab muaj cov hmoov txhuv nplej siab, cov protein, cov organic acids, thiab cov roj me me. COD (Chemical Oxygen Demand) feem ntau yog nruab nrab ntawm 5000 thiab 30000 mg / L, thiab BOD / COD piv yog kwv yees li 0.53, qhia txog biodegradability zoo. Yog tias tso tawm yam tsis muaj kev kho mob, nws yuav ua rau tsis muaj oxygen, blackening, thiab qias neeg hauv lub cev dej, ua rau muaj kev cuam tshuam loj rau ecological ib puag ncig. Yog li ntawd, txhua lub teb chaws tau ua raws li cov qauv kev tso tawm nruj dua rau cov dej khib nyiab, thiab cov tuam txhab lag luam yuav tsum tsim kom muaj cov dej phwj tuaj kho.
Jinan Guangbo Environmental Protection tau tsim ib qho kev kho tag nrho - cov txheej txheem kev kho mob rau pob kws hmoov txhuv nplej siab cov dej khib nyiab nrog COD siab, cov khib nyiab siab, thiab kev hloov pauv loj hauv cov dej zoo thiab ntim. Cov txiaj ntsig tseem ceeb yog qhov tseem ceeb. Nws tus kheej -tsim thiab optimized UASB, IC/GBIC anaerobic reactors ua ke nrog huab cua flotation pretreatment cov cuab yeej muaj peev xwm daws tau qhov teeb meem ntawm cov hmoov txhuv nplej siab residue degradation, txo cov txheej txheem tom ntej, muaj txiaj ntsig zoo COD tshem tawm kev ua tau zoo, thiab tuaj yeem tshem tawm cov dej zoo hloov pauv qhov cuam tshuam, kev ua haujlwm ruaj khov. Nws txais yuav "ua ntej-kev kho mob + anaerobic + aerobic + sib sib zog nqus purification" txheej txheem ua ke, ua ke nrog cov ntaub ntawv -hom MBR membrane pab pawg tshuab, cov effluent ruaj khov thiab ua tau raws li cov qauv thiab tuaj yeem siv rau kev tsim rov siv dua. Nyob rau tib lub sijhawm, ntu anaerobic rov qab biogas rau kev siv hluav taws xob, thiab kev kho ua ntej - kho cov protein, tsim kom muaj peev txheej rov ua dua tshiab, txo qis kev lag luam kev kho thiab cov nqi siv dej. Tsis tas li ntawd, lub tuam txhab muaj peev xwm rau kev tsim kho modular thiab cov cuab yeej tseem ceeb ntawm tus kheej- kev tshawb fawb, thiab tuaj yeem muab cov kev pabcuam sib xyaw ua ke los ntawm cov qauv tsim, kev tsim kho vaj tsev rau kev coj ua haujlwm, tsim nyog rau cov phiaj xwm sib txawv, thiab ntsuas kev kho mob thiab kev lag luam.
Cov duab qhia txog kev tsim cov nplej hmoov nplej
II. Kev Kho Cov Nplej Starch Wastewater - Qhov chaw ntawm cov dej khib nyiab
Lub hauv paus ntawm cov hmoov txhuv nplej siab cov dej khib nyiab yog ze ze rau cov txheej txheem ntawm cov hmoov nplej nplej. Thaum lub sij hawm tsim cov nplej hmoov nplej, cov dej khib nyiab feem ntau yog los ntawm cov theem tseem ceeb hauv qab no:
1. Raw khoom ntxuav dej
Nyob rau hauv thawj theem ntawm cov nplej hmoov txhuv nplej siab, cov khoom siv raw yuav tsum tau ntxuav kom tshem tawm cov impurities thiab hmoov av. Cov txheej txheem no tsim cov dej khib nyiab ntau ntau, uas muaj qee yam ntawm cov organic teeb meem thiab cov khib nyiab tshem tawm.
2. So dej
Ua ntej muab cov hmoov txhuv nplej siab los ntawm cov nplej nyoos, lawv feem ntau yuav tsum tau soaked kom muag cov ntaub ntawv thiab pab txhawb kev sib tsoo thiab sib cais. Thaum lub sij hawm soaking, cov ntaub ntawv raw tau tso qee cov tshuaj soluble, uas yaj hauv dej thiab tsim cov dej khib nyiab. Cov ntsiab lus organic ntawm hom dej khib nyiab no kuj yog siab heev.
3. Cov kua protein los ntawm cov txheej txheem sib cais
Thaum lub sij hawm sib cais thiab ua kom zoo ntawm cov hmoov txhuv nplej siab, cov kua uas muaj cov protein yog sib cais. Cov kua no yog cov kua protein ntau thiab muaj ntau cov organic teeb meem, uas yog ib qho tseem ceeb hauv kev kho dej khib nyiab.
4. Cov khoom siv yaug dej
Thaum lub sij hawm tsim khoom, ntau yam khoom siv yuav tsum tau muab yaug tom qab txhua qhov kev siv los xyuas kom meej qhov huv thiab huv ntawm cov khoom siv. Cov dej khib nyiab tsim tawm thaum lub sij hawm ntxuav cov txheej txheem muaj cov hmoov txhuv nplej siab thiab cov khoom organic uas tseem tshuav ntawm cov khoom siv.
5. Cov dej ntshiab los ntawm lub tank starch thiab centrifuge dewatering
Cov dej ntshiab los ntawm cov hmoov txhuv nplej siab tank thiab centrifuge dewatering yog cov kauj ruam tseem ceeb hauv kev tsim cov nplej hmoov nplej. Cov dej ntshiab los ntawm cov hmoov txhuv nplej siab yog hais txog sab sauv ntawm cov dej thaum cov hmoov txhuv nplej siab; centrifuge dewatering yog txheej txheem ntawm kev sib cais cov hmoov txhuv nplej siab los ntawm dej los ntawm lub zog centrifugal.
Tag nrho cov kauj ruam no yuav tsim kom muaj qee qhov dej khib nyiab. Tus nqi pH ntawm cov dej khib nyiab no feem ntau yog nyob nruab nrab ntawm 4 thiab 6, nrog rau COD cov ntsiab lus ntawm 7000 txog 12000, BOD cov ntsiab lus ntawm 4000 txog 7000, thiab cov ntsiab lus SS ntawm 500 txog 1000. Rau txhua 1 tuj ntawm cov hmoov txhuv nplej siab, 10 mus rau 20 m³ ntawm cov dej khib nyiab tawm.
Kev sib piv ntawm cov duab qhia cov dej qias neeg thiab cov duab qhia cov dej kho
III. Txheej Txheem Flow rau Kev Kho Dej Wastewater ntawm Nplej Starch
Cov dej khib nyiab tsim tawm thaum lub sij hawm tsim cov nplej hmoov nplej siab yog siab -cov organic concentration, feem ntau yog los ntawm cov supernatant ntawm cov sedimentation tank thiab cov dej cawv daj uas ua los ntawm centrifugation. Nws cov yam ntxwv muaj xws li COD (Chemical Oxygen Demand) qib ntawm 5000–50000 mg / L, BOD / COD piv ntau dua 0.5, biodegradability zoo, thiab tsim nyog rau cov txheej txheem kho mob los ntawm txoj kev lom neeg. Tsis tas li ntawd, cov dej khib nyiab muaj cov protein, cov hmoov txhuv nplej siab, cov khib nyiab pov tseg (SS), nitrogen, thiab phosphorus, thiab yog acidic, yuav tsum tau kho kom zoo.
1. Pretreatment theem: Kho dej kom zoo thiab kom muaj nuj nqis, tshem tawm cov khib nyiab
Lub hom phiaj ntawm theem no yog kom ua tiav homogeneity thiab uniformity hauv dej zoo thiab kom muaj nuj nqis, kho pH, thiab pib tshem tawm cov khoom loj ntawm cov khib nyiab thiab cov tshuaj colloidal, tsim cov xwm txheej rau kev ua haujlwm ruaj khov ntawm cov txheej txheem biochemical tom ntej.
Grate filtration: Cov dej khib nyiab ua ntej nkag mus rau hauv grate los cuam tshuam cov khoom loj xws li cov nplej husks thiab fibers, tiv thaiv cov twj tso kua mis tom qab thiab cov kav dej los ntawm kev txhaws.
Equalization tank: Sau cov dej khib nyiab sib cuam tshuam thiab ua tiav cov dej zoo thiab qhov sib npaug los ntawm kev nplawm; Nyob rau theem no, kev hloov pauv pH kuj tseem tuaj yeem ua tau (feem ntau ntxiv alkali rau nruab nrab rau 6-8) kom tsis txhob cuam tshuam cov kab mob anaerobic tom ntej.
Coagulation sedimentation / huab cua flotation: Ntxiv cov neeg ua hauj lwm xws li PAC (polyaluminum chloride) thiab PAM (polyacrylamide) kom destabilize thiab coagulate nplua suspended solids thiab colloids, tsim flocs uas yog ces sib cais los ntawm sedimentation los yog huab cua flotation. Cov kauj ruam no tuaj yeem tshem tawm 60% -90% ntawm SS thiab qee qhov COD.
2. Kev kho kab mob anaerobic: Ua kom cov organic teeb meem zoo thiab tsim biogas
Siv cov kab mob anaerobic kom decompose loj -molecule organic teeb meem mus rau hauv methane thiab carbon dioxide nyob rau hauv anaerobic tej yam kev mob, ho txo COD load, thaum tsim lub zog huv si - biogas.
Common reactor hom:
UASB (upflow anaerobic sludge bed): Feem ntau siv, featuring sludge granulation, siab kho efficiency, thiab tsawg zog noj.
IC / EGSB: Tsim nyog rau cov dej khib nyiab ntau dua, nrog cov qauv hauv kev ncig, muaj zog poob siab.
3. Kev kho mob aerobic: ua kom tiav cov khoom seem ntawm cov organic thiab tshem tawm nitrogen
Nyob rau hauv cov pa oxygen, siv cov kab mob aerobic hauv cov activated sludge los yog biofilm ntxiv oxidize residual organic teeb meem thiab ua kom tiav cov txheej txheem nitrification thiab denitrification kom ua tiav cov nitrogen tshem tawm.
Cov txheej txheem muaj xws li:
A/O txoj kev (anoxic{0}}aerobic): Ua tiav denitrification thiab tshem tawm nitrogen;
SBR (sequencing batch activated sludge process): Slexible operation, adaptable to fluctuating loads;
Oxidation ditch + Secondary sedimentation tank: Cov qauv yooj yim, kho yooj yim.
4. Kev kho mob siab heev thiab tshuaj tua kab mob: Ua kom muaj kev ua raws li cov dej ntws tawm
Txawm tias tom qab kev kho mob biochemical, cov kua dej tseem tuaj yeem muaj me me ntawm cov khib nyiab, xim, lossis cov kab mob pathogenic, yuav tsum tau kho kom zoo ntxiv.
Coagulation sedimentation: Ntxiv PAC (polyaluminum chloride) thiab lwm yam flocculants kom tshem tawm cov seem ntawm cov colloids thiab phosphates, nrog rau ntau npaum li cas ntawm 50-200 mg / L.
Membrane sib cais tshuab: Ultrafiltration (UF) + thim rov qab osmosis (RO): Siv rau cov dej rov qab siv dua, nrog cov desalination siab.
Cov pa roj carbon activated adsorption: Tshem tawm xim thiab taug qab nyuaj -kom-degrade organic tshuaj, nrog rau qhov muaj peev xwm adsorption ntawm kwv yees li 100-300 mg / g.
Muaj peev xwm nruab nrog cov dej phwj tuaj kho dej ntws
Muaj dej khib nyiab → Bar tshuaj ntsuam zoo → Sib npaug tank → Coagulation thiab flotation → Anaerobic biochemical kev kho → Aerobic biochemical kev kho → Advanced kho → Tshem tawm los yog rov qab siv dua
IV. Cov Kev Kawm Tshwj Xeeb ntawm Kev Kho Dej Ncua Ntawm Cov Nplej Starch
Cov Ntaub Ntawv Kawm: Kev Kho Dej Pov Tseg rau Nplej Starch los ntawm Zaozhuang Xingnong Starch Factory
Zaozhuang Xingnong Starch Factory tsuas yog tsim cov hmoov txhuv nplej siab. Cov dej khib nyiab tsim tawm thaum lub sijhawm tsim khoom, xws li dej cawv daj, muaj COD concentration siab (kwv yees li 10,000 mg / L), qhov hloov pauv ntawm cov dej tsis zoo thiab ntau, ntau cov hmoov txhuv nplej siab thiab cov protein tshem tawm cov khib nyiab, thiab cov kua qaub. Cov chaw kho mob thawj zaug muaj kev ua haujlwm tsawg thiab cov ntsuas dej tsis ruaj khov, uas tsis tuaj yeem ua tau raws li cov cai ntawm "Starch Industry Water Pollutants Discharge Standards", thiab cov dej khib nyiab tsis tau siv los ua cov peev txheej. Tus nqi kho mob kuj yog siab heev.
Jinan Guangbo Environmental Protection tau kho cov kev kho mob sib xyaw ua ke rau lub Hoobkas cov dej khib nyiab, suav nrog kev txhim kho huab cua flotation pretreatment + npaum IC anaerobic reactor + A / O aerobic txheej txheem + sib sib zog nqus purification. Nyob rau hauv lub pretreatment theem, yaj huab cua flotation zoo tshem tawm cov khib nyiab thiab neutralizes cov kev cuam tshuam ntawm acidic dej zoo rau cov txheej txheem tom ntej; tus kheej -tsim IC anaerobic reactor optimizes cov dej faib thiab peb-theem sib cais system, muaj zog poob siab tsis kam, zoo degrades organic pollutants thaum recovering biogas siv nyob rau hauv lub Hoobkas ntau lawm cua sov; Cov txheej txheem A / O ua tiav ib txhij tshem tawm nitrogen thiab carbon, thiab cov purified sib sib zog nqus effluent yog ib nrab rov qab los rau kev tu ntau lawm, ua tiav cov khoom siv dej rov qab.
Tom qab qhov project tau muab tso rau hauv kev ua haujlwm, COD tshem tawm tus nqi ntawm cov dej khib nyiab tshaj 98%, thiab cov ammonia nitrogen tshem tawm yog siab dua 95%. Cov ntsuas dej ntws tau ruaj khov thiab ua tau raws li cov qauv tso tawm. Kev siv cov khoom siv rov qab mus txog 30%. Kev rov qab thiab siv biogas txuag lub Hoobkas txog 120,000 yuan hauv cov nqi hluav taws xob txhua xyoo, thiab cov nqi kho mob ib tuj dej tau txo los ntawm 15%. Guangbo Environmental Protection tseem muab tag nrho - cov txheej txheem cov kev pabcuam suav nrog kev teeb tsa thiab kev ua haujlwm, nrog rau kev tshaj tawm - kev tswj xyuas kev ua haujlwm, teb sai sai rau cov dej tsis zoo hloov pauv thaum lub caij ua haujlwm siab tshaj plaws, ua kom lub sijhawm ntev - lub sijhawm ua haujlwm ruaj khov ntawm kev kho dej khib nyiab, thiab kev daws teeb meem rau kev tiv thaiv ib puag ncig, kev ua raws li qhov ua tau zoo ntawm Starozhuang. ib qho kev txhim kho dual hauv kev tiv thaiv ib puag ncig thiab cov txiaj ntsig kev lag luam.
