Sludge drying Treatment Solution:
Daim ntawv thov txheej xwm thiab cov ntaub ntawv tsom xam ntawm kab rov tav nyias zaj duab xis ziab ob-theem txheej txheem hauv sludge mixed firing fais fab teb
Kab lus no qhia txog cov txheej txheem ob theem ntawm kab rov tav nyias zaj duab xis sludge ziab tshuab kom ntxaws, thiab tshuaj xyuas cov sludge kho, pov tseg qhov kev nthuav dav hauv xyoob Park ua piv txwv. Kab rov tav nyias zaj duab xis ziab tshuab muaj peev xwm ua haujlwm loj, muaj kev nyab xeeb siab, sealing zoo, tsis tshua muaj pa roj, thiab ib puag ncig kev ua haujlwm zoo. Raws li qhov zoo ntawm kab rov tav nyias zaj duab xis ziab cov khoom siv ob-theem txheej txheem hauv kev nyab xeeb, yoog raws, kev lag luam thiab lwm yam, cov txheej txheem sludge ziab no tau siv ntau dua hauv kev sib xyaw sludge thiab hluav taws xob tsim hluav taws xob, thiab tuaj yeem siv los ua ib qho ntawm cov txheej txheem nyiam rau kev kho sludge thiab pov tseg cov haujlwm hauv cov chaw tsim hluav taws xob. Nrog rau txoj kev loj hlob sai ntawm lub nroog, cov dej phwj tuaj txuas ntxiv nce ntxiv, thiab kev txhim kho cov dej phwj tuaj kho cov nroj tsuag txuas ntxiv kom nrawm, ua rau muaj kev loj hlob ntawm cov sludge tawm. Thaum kawg ntawm xyoo 2016, Tuam Tshoj cov dej phwj kho ntim tau mus txog 150 lab m / d, thiab tag nrho cov sludge yog ze li ntawm 30 lab tons. Nws tau kwv yees tias Tuam Tshoj cov sludge tso tawm yuav ntau tshaj 60 lab tons los ntawm 2020 raws li 80% noo noo cov ntsiab lus. Cov sludge tsim nyob rau hauv kev sau thiab kev kho cov dej phwj hauv nroog yuav muaj cov hlau hnyav, kab mob, kab mob, kab mob thiab ntau cov tshuaj lom neeg lom. Yog tias tsis kho thiab muab pov tseg kom zoo, nws yuav ua rau muaj kev puas tsuaj loj rau ib puag ncig ntawm thaj chaw tawm thiab ua rau tib neeg noj qab haus huv. Qhov teeb meem ntawm kev kho sludge thiab pov tseg tau dhau los ua ib qho teeb meem tseem ceeb ntawm ib puag ncig raws li qhov xwm txheej tam sim no. Tam sim no, lub ntsiab sludge kev kho mob muaj xws li concentration, txias, lub cev qhuav dej, ziab, thiab lwm yam., feem ntau yog concentration, txias thiab lub cev qhuav dej, qhuav tus nqi yog tseem nyob rau theem qis. Sludge pov tseg yog hais txog qhov chaw kawg ntawm sludge tom qab kho. Tam sim no, cov txheej txheem tseem ceeb ntawm cov sludge pov tseg muaj xws li cov chaw tu huv, kev siv av, kev siv cov khoom siv hauv tsev tom qab incineration, thiab lwm yam, ntawm cov khoom siv huv huv yog txoj kev siv ntau tshaj plaws. Ntawm qhov tod tes, vim yog cov qauv nruj zuj zus ntxiv thiab txwv tsis pub muaj peev txheej av ntawm qhov tod tes, kev kho thiab pov tseg ntawm kev ziab thiab incineration tau dhau los ua ntau dua.
Kab rov tav nyias zaj duab xis sludge ziab ob-theem txheej txheemSludge drying yog txheej txheem uas siv cov hluav taws xob hluav taws xob los yog cov khoom siv hluav taws xob hluav taws xob thiab cov hluav taws xob pov tseg uas tsim los ntawm kev hlawv cov fossil fuels kom sai sai evaporate cov dej hauv sludge los ntawm cov cuab yeej tshwj xeeb thiab cov cuab yeej siv. Sludge drying tshem tawm cov dej hauv cov sludge, kom ua tiav lub hom phiaj ntawm ziab cov sludge, txo qhov ntim ntawm cov sludge, txhim kho lub calorvalue ntawm sludge, thiab ib txhij paub txog qhov txo thiab stabilization ntawm cov sludge. Kab rov tav nyias zaj duab xis sludge ziab kom qhuav ob-theem txheej txheem yog ib qho ntawm cov txheej txheem tseem ceeb ntawm cov txheej txheem loj sludge drying nyob rau tam sim no, uas yog cov txheej txheem cua kub tsis ncaj uas siv cov roj saturated los yog cov roj hluav taws xob ua hluav taws xob.
Cov khoom siv tseem ceeb
Cov khoom siv tseem ceeb ntawm kab rov tav nyias zaj duab xis sludge ziab ob-theem txheej txheem yog kab rov tav nyias zaj duab xis ziab tshuab. Xinjieyuan Environmental Protection Technology Co., Ltd.'s ntsig txog ib puag ncig cov khoom lag luam suav nrog petrochemical, tshuaj, zaub mov, ib puag ncig thiab lub zog. Lub tuam txhab Xinjieyuan muaj cov khoom tiav kev tshawb fawb thiab kev loj hlob chaw thiab kev sim puag. Lub tuam txhab yog lub ntiaj teb thawj coj hauv kev sib cais thermal kev daws teeb meem rau cov khoom sib xyaw refractory thiab nyias zaj duab xis evaporation tshuab, nrog rau cov thawj coj hauv kev txhim kho thiab tsim cov khoom siv kom qhuav cov ntaub ntawv siab viscosity.
Daim duab qhia cov duab kos duab ntawm kab rov tav nyias zaj duab xis ziab tshuab. Kab rov tav nyias zaj duab xis ziab tshuab yog tsim los ntawm peb qhov chaw: plhaub, rotor thiab hniav, thiab tsav tsheb. Lub plhaub yog lub nkoj siab, thiab lub plhaub lub tsho tuaj yeem ntim nrog cov roj saturated los yog cov roj hluav taws xob ua hluav taws xob raws li qhov nruab nrab ntawm cov sludge ziab txheej txheem. Cov khoom siv yog kub resistant boiler steel ntawm European tus qauv. Sab hauv phab ntsa yog qhov hloov hluav taws xob nyob rau hauv kev sib cuag nrog cov sludge, muab lub ntsiab tshav kub pauv thiab cov cab kuj ntawm nyias txheej ntawm sludge. Corrosion kuj thiab hnav tsis kam yog zoo dua li lwm cov ntaub ntawv; Lub rotor yog ib qho tseem ceeb hollow ncej, thiab nws cov txheej txheem tshwj xeeb tuaj yeem ua kom ntseeg tau tias lub rotor tsis tsim deflection thaum raug cua sov thiab tig ntawm kev kub ceev, thiab qhov kev ncua deb ntawm sab ntug ntawm cov hniav thiab sab hauv phab ntsa yog ib txwm khaws cia ntawm 5-10mm. Nyob rau hauv kev sib hloov ntawm lub rotor thiab txheej ntawm cov hniav, cov sludge nkag mus rau hauv lub tshuab ziab khaub ncaws yuav tsim ib tug dynamic nyias txheej ntawm lub puab phab ntsa uniformly, thiab nyias txheej ntawm sludge yog tas li tshiab. Nws tseem qhuav thaum nws nce mus rau qhov hluav taws xob.
Txheej txheem khiav
Tom qab decanter centrifuge dewatering, cov sludge ntub dej nrog cov dej noo ntawm 80% -85% yog thauj mus rau cov sludge ntub dej los ntawm tsheb thauj mus los lossis cov kav dej. Lub silo yog muab nrog ib tug swb ncej los tiv thaiv sludge los ntawm erecting choj, thiab hauv qab yog muab nrog unloading ntsia hlau thiab ntub sludge xa twj.
Lub twj tso kua mis ntub dej thauj cov sludge mus rau qhov nkag ntawm lub tshuab ziab khaub ncaws nyias, thiab cov sludge nkag mus rau lub tshuab ziab khaub ncaws nyias yog coated rau ntawm phab ntsa kub los ntawm cov hniav ntawm lub rotor. Cov hniav tsis tsuas yog rov ua dua thiab muab cov sludge rau ntawm phab ntsa kub, tab sis kuj thawb nws mus rau pem hauv ntej rau cov av nkos. Nyob rau hauv cov txheej txheem no, cov dej hauv cov sludge yog rhuab thiab evaporated rau hauv dej chav, uas txav inversely nrog cov sludge nyob rau hauv lub tshuab ziab khaub ncaws thiab nkag mus rau hauv cov pa roj condensation system los ntawm lub tso tank saum toj no sludge noj chaw nres nkoj.
Tom qab cov evaporation Tail gas generated nyob rau hauv lub nyias zaj duab xis ziab tshuab nkag mus rau hauv lub condensation system los ntawm lub tso lub thawv, nws xub nkag mus rau hauv lub condenser. Nyob rau hauv lub condenser, cov khib nyiab yog ntxuav los ntawm dej, thiab cov dej yog condensed los ntawm evaporation tail gas. Ib qho me me ntawm cov pa roj uas tsis yog condensing (cov teeb meem tsis haum hauv huab cua thiab sludge) raug tso tawm los ntawm lub tshuab ziab khaub ncaws los ntawm cov kiv cua tawm tom qab kev sib cais los ntawm cov khoom siv demisting thiab ua tiav hauv qhov deodorization system lossis incineration system. Tus nqi ntawm cov pa tso tawm los ntawm lub tshuab ziab khaub ncaws nws tus kheej yog tsawg heev, tsuas yog 5% -10% ntawm cov dej evaporation ntawm lub system. Cov pa cua ntxuam ua rau tag nrho cov tshuab ziab khaub ncaws hauv lub xeev tsis zoo kom tsis txhob muaj ntxhiab tsw thiab plua plav.
Cov sludge qhuav nrog 30% -40% noo noo cov ntsiab lus uas tsim los ntawm nyias zaj duab xis tshuab ziab khaub ncaws yog ntxiv qhuav nyob rau hauv lub tom ntej linear drying tshuab, thiab qhov tsawg kawg nkaus noo noo cov ntsiab lus yuav qhuav mus rau 5%. Thaum cov sludge qhuav tau khaws cia ib ntus, cov sludge txias tau teeb tsa. Cov sludge tom qab ziab los ntawm lub tshuab ziab khaub ncaws yog txias ua ntej, thiab qhov kub ntawm cov sludge raug txo kom qis dua 50 ℃ los txhim kho kev nyab xeeb thiab tiv thaiv cov sludge los ntawm smoldering lossis spontaneous combustion. Tom qab ntawd nws raug xa mus rau qhuav sludge silo rau cia los ntawm kev tawm valve thiab scraper conveyor nyob rau hauv lem. Thaum cov txheej txheem incineration txuas ntxiv, lub tshuab ziab khaub ncaws tuaj yeem txuas ncaj qha nrog lub tshuab incineration hauv series los ntawm cov khoom siv conveying. Ob-theem kab rov tav nyias zaj duab xis ziab txheej txheem tuaj yeem ua tiav qhov kev xav tau ntawm tus kheej-inertification hauv lub cev los ntawm cov dej evaporating hauv cov sludge. Nyob rau hauv cov ntaub ntawv ntawm kev pib thiab thaum muaj xwm ceev, tsis tshua muaj siab chav, dej tshiab los yog nitrogen gas yog siv raws li ib tug inertification nruab nrab ntawm lub tshuab ziab khaub ncaws. Cov pa oxygen cov ntsiab lus analyzer tau teeb tsa ntawm qhov hluav taws xob ntawm lub tso pa tawm, thiab kev ua haujlwm nyab xeeb thiab ruaj khov ntawm sludge drying system tuaj yeem pom tau los ntawm kev tswj cov pa oxygen hauv lub tshuab ziab khaub ncaws.
Qhov zoo ntawm cov txheej txheem
1) Kev nyab xeeb: zoo airtightness ntawm nyias zaj duab xis sludge drying system, ib txwm tuav ib tug micro tsis zoo siab ntawm -0.5 rau -1kPa, tsis muaj tsw thiab plua plav overflow; Lub kaw lus tuaj yeem ua tus kheej inert thiab teeb tsa ntau yam inert txhais tau tias, cov pa oxygen hauv cov haujlwm hauv nroog tau tswj hwm qis dua 5%; Kev ziab sludge kub ntawm qhov hluav taws xob ntawm lub tshuab ziab khaub ncaws tuaj yeem ncav cuag 100 ℃, uas tuaj yeem ua lub luag haujlwm ntawm kev ua kom tsis muaj menyuam thiab ua tau raws li EPA503 tus qauv ntawm cov sludge pov tseg code ntawm US Environmental Protection Agency. Tsis muaj teeb meem kev nyab xeeb hauv daim ntawv thov keeb kwm. 2) Kev ruaj ntseg: nyob rau hauv cov sludge thiab thee cooperative incineration project, thaum cov dej noo ntawm cov sludge nkag mus rau hauv boiler ntawm lub fais fab nroj tsuag yog loj, nws yog ib qho yooj yim kom muaj kev cuam tshuam tsis zoo rau lub boiler khoom, uas tej zaum yuav ua rau cov khoom loj puas tsuaj. Ua ntej, cov phab ntsa sab hauv ntawm lub cub tawg yog ntxuav thiab hnav tiag tiag, thiab qhov thib ob yog ib qho yooj yim uas yuav ua rau muaj kev cuam tshuam ntawm cov khoom siv thauj khoom, uas ua rau lub qhov cub kaw. Ob-theem txheej txheem ntawm nyias zaj duab xis sludge drying muaj tsawg sludge noo noo cov ntsiab lus, thiab muaj peev xwm paub ceev ceev hloov ntawm sludge noo noo ntsiab lus ntawm 20% -33% los ntawm kev kho cov chav siab nyob rau hauv lub tshuab ziab khaub ncaws. Piv nrog rau lwm cov txheej txheem, nws muaj cov txiaj ntsig zoo thiab ua lub luag haujlwm zoo hauv kev tswj hwm kev ruaj ntseg ntawm cov cuab yeej siv hluav taws xob thiab kev ua haujlwm ntawm lub zog hluav taws xob.
3) Yooj yim: lub uniformity thiab granulation ntawm sludge cov khoom yuav txhim khu kev ruaj ntseg ntawm fais fab nroj tsuag boiler lag luam. Lwm cov txheej txheem yuav tsum tau nce crushing los yog granulation khoom, thaum lub nyias zaj duab xis tshuab ziab khaub ncaws tuaj yeem ua tus kheej granulation, cov khoom yog uniform granulation sludge, tsis muaj ntxiv granulation khoom; Cov khoom siv me me, cov hneev taw me me, kev ua haujlwm yooj yim thiab kev tswj hwm; Tsis muaj cov pa roj xa mus, tsis muaj sludge rov qab sib xyaw; Raws li "Pressure Vessel Maintenance Regulations", txhua yam ntawm cov tshuab ziab khaub ncaws yuav tsum tau ua raws li kev soj ntsuam ntawm phab ntsa sab hauv, nyias zaj duab xis tshuab ziab khaub ncaws tsis muaj lwm yam khoom nqa, yooj yim thiab siv tau zoo.
4) Flexible: ntau yam ntawm daim ntawv thov, haum rau ntau hom sludge, tuaj yeem txais mus rau hauv av nkos cov ntsiab lus ntawm 65% -90% ntub sludge; Cov txheej txheem ob-theem tuaj yeem tsim cov khoom lag luam nrog cov ntsiab lus tsis sib xws. Lub sijhawm pib, nres thiab tshem tawm lub sijhawm luv luv, thiab tsis tas yuav tsum tau ua haujlwm kom rov pib dua. 5) Economy: siab evaporation efficiency. Nyob rau hauv lub sludge co-incineration project, lub chav ntawm lub fais fab nroj tsuag yuav siv tau ncaj qha raws li lub tshav kub nruab nrab. Cov dej evaporation ib square meter ntawm nyias txheej tshuab tuaj yeem ncav cuag ntau tshaj 45kg ib teev. Cov dej num hauv nroog tuaj yeem ua ke nrog lwm lub tshuab (xws li lub plab zom mov), tuaj yeem ua tiav ntau dua 80% kev ua haujlwm siab ntawm lub zog hluav taws xob rov qab; Tus nqi tu qis, tsuas yog ib xyoos tshuaj xyuas ntawm 5-10 hnub hauv ib xyoos; Cov ntxhiab tsw me me, tus nqi kho mob tsawg; Tsis siv neeg tswj tag nrho, tsis tshua muaj kev saib xyuas yuav tsum tau ua.
Cov ntaub ntawv kawm ntawm kab rov tav nyias zaj duab xis sludge ziab ob-theem txheej txheem hauv sludge mixed firing fais fab teb
Cov khoom siv ntawm kev kho sludge thiab pov tseg kev nthuav dav ntawm Shanghai Zhuyuan Cheeb Tsam yog lub dewatered sludge generated los ntawm cov dej phwj tuaj kho ntawm thawj thiab thib ob Zhuyuan dej phwj kho cov nroj tsuag upgraded mus rau effluent tus qauv ntawm Qib A thiab cov 2.2 lab m / d dej phwj kho tom qab ua tiav ntawm lub tshiab upgrade thiab ntxiv project. Kev tsim kho ntawm qhov project yog 223tDS / d, sib npaug ntawm cov sludge ntim ntawm 80% noo noo cov ntsiab lus 1115t / d. Qhov chaw teeb tsa suav nrog kev saib xyuas ntawm txoj kab incineration ntawm thawj theem ntawm qhov project, thiab qhov kev kho mob siab tshaj plaws ntawm qhov project yog 288.5tDS / d, sib npaug rau sludge ntim ntawm 80% noo noo cov ntsiab lus 1442.5t / d. Txoj kev kho sludge txoj kev siv txheej txheej nyias kom qhuav ob-theem txheej txheem + fais fab cog kev sib xyaw thiab tua cov txheej txheem. Lub dewatered sludge nrog 80% noo noo cov ntsiab lus yog thauj mus rau sludge kho nroj tsuag los ntawm pob tseg tsheb. Tom qab cov sludge tau txais thiab khaws cia, cov sludge ntub dej yog pumped mus rau nyias zaj duab xis sludge drying system, thiab ces qhov nruab nrab noo noo cov ntsiab lus yog txo mus rau 30% (adjustable ntau yam ntawm 20% ~ 30%) tom qab lub tshuab ziab khaub ncaws. Cov sludge qhuav generated yog thauj los ntawm kaw tsheb thauj mus rau Shanghai Waigaoqiao No. 2 Fais Fab Cog lossis No. 3 Fais Fab Cog rau co-incineration nrog thee.
Daim duab yog daim duab sludge drying system daim duab ntawm sludge kho thiab pov tseg expansion project nyob rau hauv Zhuyuan cheeb tsam. Tom qab lub sludge tsheb thauj khoom yog hnyav los ntawm qhov hnyav, cov sludge ntub dej tau muab pov tseg rau hauv cov khoom siv hauv av, thiab tom qab ntawd thauj mus rau hauv cov khoom ntub dej ntub dej los ntawm lub plunger twj tso kua mis. Tom qab ntawd cov sludge ntub dej yog thauj mus rau nyias zaj duab xis ziab tshuab los ntawm cov ntsia hlau unloading thiab ntsia hlau twj tso kua mis. Cov sludge ntub dej nkag mus rau hauv lub tshuab ziab khaub ncaws nyias nyias rau thawj theem ntawm ziab, thiab cov sludge qhuav poob rau hauv lub tshuab ziab khaub ncaws los ntawm chute. Cov sludge qhuav yog ntxiv qhuav rau hauv lub tshuab ziab khaub ncaws linear. Cov dej noo ntawm cov sludge tuaj yeem ua tiav sai sai hauv thaj tsam ntawm 20% -33% los ntawm kev kho lub zog siab hauv lub tshuab ziab khaub ncaws. Tom qab lub thib ob theem ntawm ziab, cov sludge nkag mus rau hauv lub qhov cub txias kom txias, thiab ces thauj mus rau qhuav sludge silo rau ib ntus cia los ntawm lub unloading valve thiab scraper.
Cov evaporative tail gas tsim los ntawm lub tshuab ziab khaub ncaws nws tus kheej txav rov qab nrog cov sludge, thiab lub thawv tso rau saum lub tshuab ziab khaub ncaws nws tus kheej nkag mus rau tom qab tail gas condensation system. Cov evaporative tail gas yog txau thiab condensed nyob rau hauv lub condenser, thiab cov roj uas tsis yog-condensing nkag mus rau tom qab defogger. Tom qab cov kua dej sib cais hauv lub defogger, cov roj av kawg yog tawm ntawm lub tshuab ziab khaub ncaws los ntawm lub kiv cua thiab nkag mus rau hauv cov tshuaj tsw qab rau kev kho mob. Cov pej xeem engineering tej yam kev mob uas siv nyob rau hauv kab rov tav nyias zaj duab xis ziab tshuab feem ntau suav nrog saturated chav, dej nruab nrab, ntsuas cua, circulating dej txias thiab dej tshiab. Lub tshuab ziab khaub ncaws yog siv los ntawm lub tshuab fais fab thiab muab faib rau 10 cov kab ntau lawm los ntawm cov thooj voos kheej kheej. Lub tshuab ziab khaub ncaws yog nruab nrog lub tshuab cua siab los muab cov twj ntsuas cua, lub tshuab ua kom rov ua kom rov qab tau siv los ua kom rov qab tau cov chav condensate ntawm lub tshuab ziab khaub ncaws, thiab cov dej txias txias muab cov dej txias rau lub cev. Cov dej khib nyiab tsim los ntawm lub tshuab ziab khaub ncaws feem ntau yog cov tshuaj tsuag dej tom qab ntxuav cov evaporation tail gas nrog cov dej nruab nrab, thiab cov dej phwj tuaj no yuav raug xa rov qab mus rau cov dej phwj tuaj kho. Cov pa tso pa nkag mus rau hauv cov tshuaj tsw qab rau kev kho mob hauv nruab nrab. Tom qab ziab, cov sludge raug xa mus rau Waigaoqiao Fais Fab Cog rau co-incineration nrog thee. Lub tshuab ziab khaub ncaws qhuav ntawm cov sludge kho thiab pov tseg kev nthuav dav ntawm Zhuyuan Area tau ua tiav qhov kev ntsuam xyuas kev ua tau zoo nyob rau lub Yim Hli 2020. Lub sijhawm ua haujlwm txhua xyoo ntawm qhov project tuaj yeem ncav cuag 8000h, thiab txhua xyoo sludge kho muaj peev xwm ncav cuag ntau tshaj 400,000 tons. Kev ua tiav thiab kev ua haujlwm ntawm qhov project yuav pab daws qhov teeb meem ntawm sludge qhov hluav taws xob hauv Zhuyuan Cheeb Tsam, thiab pab Shanghai kev lag luam kom ua tiav txoj kev loj hlob. Nws tuaj yeem muab kev siv rau kev kho sludge hauv tsev thiab pov tseg cov haujlwm nrog lub zog cog co-incineration.
Cov ntsiab lus
1) Cov kab rov tav nyias zaj duab xis kom qhuav qhov system muaj airtightness zoo, tuaj yeem ua tiav cov ntsiab lus oxygen nruj, thiab muaj kev nyab xeeb siab. Tsis muaj kev nyab xeeb kev nyab xeeb tau tshwm sim hauv daim ntawv thov keeb kwm ntawm ntau tshaj 30 xyoo, thiab nws yog ib qho ntawm cov txheej txheem ziab kom zoo tshaj plaws nyob rau hauv thaj tsam ntawm sludge ziab niaj hnub no.
2) Hauv kev sib xyaw sludge thiab tua hluav taws xob tsim hluav taws xob, kev tswj cov sludge qhuav thiab cov ntsiab lus noo noo yog qhov tseem ceeb heev, uas yuav cuam tshuam rau kev ua haujlwm ntawm kev ua haujlwm tom ntej ntawm lub tshuab ziab khaub ncaws. Ntawm ib sab, txoj kab rov tav nyias txheej ziab ob-theem txheej txheem tuaj yeem tsim cov khoom siv granular nrog cov khoom me me thiab tsis muaj plua plav, thiab ntawm qhov tod tes, nws tuaj yeem paub qhov kev hloov ntawm cov dej noo sai sai los ntawm kev hloov cov chav siab thiab qhov ceev ntawm ob-theem linear drying tshuab. Kev tswj xyuas zoo ntawm cov duab thiab cov ntsiab lus noo noo ntawm cov sludge qhuav tuaj yeem ua kom ruaj khov ntawm tag nrho cov kab ke.
3) Kab rov tav nyias txheej ziab ob-theem sludge ziab ziab kev sib koom ua ke pov tseg yog txoj kev txhim kho ntawm kev kho hauv nroog sludge thiab pov tseg, uas muaj cov txiaj ntsig zoo hauv kev nyab xeeb, kev ruaj ntseg, kev ntseeg siab, qib siab thiab lwm yam. Daim ntawv thov ntawm kab rov tav nyias zaj duab xis ziab ob-theem txheej txheem hauv kev koom tes pov tseg cov sludge yog ib qho kev tshawb fawb thiab tsim nyog rau kev kho hauv nroog sludge thiab pov tseg niaj hnub no.
