31.Dab tsi yog suspended solids?
Suspended solids SS kuj hu ua cov khoom tsis lim. Txoj kev ntsuas yog lim cov qauv dej nrog 0.45μm lim membrane thiab tom qab ntawd evaporate thiab qhuav cov lim seem ntawm 103oC ~ 105oC. Volatile suspended solids VSS yog hais txog qhov loj ntawm cov khib nyiab tshem tawm uas volatilizes tom qab hlawv ntawm qhov kub ntawm 600oC, uas tuaj yeem kwv yees cov ntsiab lus ntawm cov organic teeb meem hauv cov khib nyiab tshem tawm. Cov khoom seem tom qab kub hnyiab yog cov khoom uas tsis yog-volatile suspended solids, uas muaj peev xwm roughly sawv cev rau cov ntsiab lus ntawm inorganic teeb meem nyob rau hauv lub suspended solids.
Nyob rau hauv cov dej khib nyiab los yog cov dej tsis huv, cov ntsiab lus thiab cov khoom ntawm cov khoom tsis zoo hauv cov dej tsis huv sib txawv raws li qhov xwm txheej ntawm cov pa phem thiab qib ntawm cov pa phem. Suspended solids thiab volatile suspended solids yog cov cim tseem ceeb rau kev tsim kho cov dej khib nyiab thiab kev tswj xyuas kev ua haujlwm.
32. Vim li cas cov khib nyiab pov tseg thiab cov khib nyiab tsis hloov pauv yog qhov tseem ceeb hauv kev tsim kho cov dej khib nyiab thiab kev tswj xyuas kev ua haujlwm?
Suspended solids thiab volatile suspended solids hauv cov dej khib nyiab yog qhov tseem ceeb hauv kev tsim kho dej khib nyiab thiab kev tswj xyuas kev ua haujlwm.
Hais txog cov ntsiab lus raug tshem tawm ntawm cov dej khib nyiab thib ob, lub teb chaws thawj theem dej phwj txheej txheem tau teev tseg tias nws yuav tsum tsis pub tshaj 70 mg / L (lub nroog theem nrab cov dej phwj tuaj kho yuav tsum tsis pub tshaj 20 mg / L), uas yog ib qho ntawm qhov tseem ceeb tshaj dej ntsuas ntsuas ntsuas. Nyob rau tib lub sijhawm, cov khib nyiab tshem tawm yog qhov taw qhia ntawm seb qhov kev kho dej phwj tuaj yeem ua haujlwm li cas. Cov kev hloov pauv txawv txav ntawm cov khoom raug tshem tawm hauv cov dej los ntawm lub tank thib ob lossis ntau tshaj tus qauv qhia tau hais tias muaj teeb meem nrog kev kho cov dej phwj tuaj, thiab cov kev ntsuas cuam tshuam yuav tsum tau ua kom rov zoo li qub.
Kev tshem tawm cov khib nyiab (MLSS) thiab cov ntsiab lus tsis muaj zog tshem tawm cov khib nyiab (MLVSS) hauv cov activated sludge nyob rau hauv cov khoom siv tshuaj lom neeg yuav tsum nyob rau hauv ib qho ntau npaum li cas, thiab rau cov dej phwj tuaj kho nrog cov dej tsis zoo, muaj qee qhov kev sib raug zoo ntawm cov khoom siv roj ntsha. ob. Yog tias MLSS lossis MLVSS tshaj li qhov tshwj xeeb lossis qhov sib piv ntawm ob qhov kev hloov pauv loj, yuav tsum tau ua kom rov qab mus rau qhov qub. Txwv tsis pub, qhov zoo ntawm cov effluent los ntawm kev kho cov kab mob lom yuav hloov tsis tau, thiab txawm tias ntau yam emission indicators, suav nrog cov khib nyiab tshem tawm, yuav dhau cov qauv. Tsis tas li ntawd, los ntawm kev ntsuas MLSS, sludge ntim qhov ntsuas ntawm lub aeration tank sib tov kuj tuaj yeem raug saib xyuas kom nkag siab txog kev daws teeb meem thiab kev ua haujlwm ntawm cov activated sludge thiab lwm yam tshuaj lom.
33. Dab tsi yog txoj hauv kev los ntsuas cov khib nyiab pov tseg?
GB11901-1989 qhia txog txoj hauv kev rau kev txiav txim siab gravimetric ntawm tshem tawm cov khib nyiab hauv dej. Thaum ntsuas tshem tawm cov khib nyiab SS, qee qhov ntim ntawm cov dej khib nyiab lossis cov kua sib xyaw feem ntau yog sau, lim nrog 0.45 μm lim membrane los cuam tshuam cov khib nyiab, thiab lim membrane yog siv los cuam tshuam cov khib nyiab ua ntej thiab tom qab. Qhov sib txawv loj yog qhov nyiaj ntawm cov khoom raug tshem tawm. Cov chav tsev feem ntau ntawm SS rau cov dej khib nyiab dav dav thiab cov dej khib nyiab thib ob yog mg / L, thaum lub tsev sib xyaw rau SS rau cov dej aeration tank tov kua thiab rov qab sludge yog g / L.
Thaum ntsuas cov qauv dej nrog cov txiaj ntsig loj SS xws li aeration tov cawv thiab rov qab sludge hauv cov dej khib nyiab, thiab thaum qhov tseeb ntawm qhov ntsuas tau qis, cov ntawv lim dej ntau tuaj yeem siv los ntawm 0.45 μm lim membrane. Qhov no tuaj yeem tsis tsuas yog cuam tshuam qhov xwm txheej tiag tiag los coj kev hloov kho ntawm cov khoom siv tiag tiag, tab sis kuj tseem txuag cov nqi kuaj. Txawm li cas los xij, thaum ntsuas SS nyob rau hauv theem nrab sedimentation tank effluent los yog sib sib zog nqus kho effluent, ib tug 0.45 μm lim membrane yuav tsum tau siv rau kev ntsuas, txwv tsis pub qhov kev ua yuam kev nyob rau hauv kev ntsuas yuav loj heev.
Nyob rau hauv cov txheej txheem kev kho dej khib nyiab, tshem tawm cov khib nyiab concentration yog ib qho ntawm cov txheej txheem tsis tu ncua, xws li inlet suspended solids concentration, tov kua sludge concentration hauv aeration, rov qab sludge concentration, seem sludge concentration, thiab lwm yam. txiav txim siab tus nqi SS, sludge concentration meters feem ntau yog siv hauv cov chaw kho dej khib nyiab, suav nrog hom kho qhov muag thiab hom ultrasonic. Lub hauv paus ntsiab lus ntawm qhov kho qhov muag sludge concentration meter yog siv lub teeb ci kom tawg mus rau thaum nws ntsib cov khoom raug tshem tawm thaum hla dej, thiab kev siv zog tsis muaj zog. Qhov tawg ntawm lub teeb yog nyob rau hauv ib qho kev faib ua feem rau tus naj npawb thiab qhov loj ntawm cov khoom raug tshem tawm. Lub teeb tawg yog kuaj pom los ntawm lub cell photosensitive. thiab cov degree ntawm lub teeb attenuation, cov sludge concentration nyob rau hauv dej yuav inferred. Lub hauv paus ntsiab lus ntawm ultrasonic sludge concentration meter yog tias thaum ultrasonic tsis dhau los ntawm cov dej khib nyiab, lub attenuation ntawm ultrasonic siv yog proportional rau cov concentration ntawm tshem tawm hais nyob rau hauv dej. Los ntawm kev txheeb xyuas qhov attenuation ntawm lub ultrasonic tsis nrog ib tug tshwj xeeb sensor, sludge concentration nyob rau hauv dej yuav inferred.
34. Kev ceev faj txog kev txiav txim siab ntawm cov khib nyiab tshem tawm yog dab tsi?
Thaum ntsuas thiab sampling, tus qauv dej effluent ntawm lub thib ob sedimentation tank los yog cov activated sludge qauv nyob rau hauv cov khoom siv tshuaj lom neeg yuav tsum yog tus sawv cev, thiab cov khoom loj ntawm floating teeb meem los yog heterogeneous clot cov ntaub ntawv rau hauv nws yuav tsum tau muab tshem tawm. Txhawm rau tiv thaiv cov khoom seem ntau dhau ntawm cov lim dej los ntawm kev nkag mus rau cov dej thiab ua kom lub sij hawm ziab kom ntev, cov qauv ntim tau zoo dua los tsim 2.5 mus rau 200 mg ntawm cov khib nyiab tshem tawm. Yog tias tsis muaj lwm lub hauv paus, cov qauv ntim rau kev txiav txim siab tshem tawm cov khib nyiab tuaj yeem raug teeb tsa li 100ml, thiab nws yuav tsum tau muab sib xyaw kom zoo.
Thaum ntsuas cov activated sludge qauv, vim yog cov ntsiab lus loj ntawm cov khib nyiab tshem tawm, cov khoom raug tshem tawm hauv cov qauv feem ntau tshaj 200 mg. Nyob rau hauv rooj plaub no, lub sij hawm ziab yuav tsum raug ncua kom tsim nyog, thiab tom qab ntawd tsiv mus rau lub tshuab ziab khaub ncaws kom txias rau qhov sib npaug ntawm qhov sib npaug ua ntej hnyav. Rov ua kom qhuav thiab ziab kom txog thaum qhov hnyav tas li lossis qhov hnyav poob qis dua 4% ntawm qhov hnyav dhau los. Txhawm rau kom tsis txhob muaj ntau yam kev ua kom qhuav, ziab, thiab ua haujlwm hnyav, txhua kauj ruam ua haujlwm thiab lub sijhawm yuav tsum tau tswj hwm nruj thiab ua tiav ntawm nws tus kheej los ntawm cov kws tshaj lij hauv chav kuaj kom paub meej cov txheej txheem zoo ib yam.
Cov qauv dej uas tau sau tseg yuav tsum tau txheeb xyuas thiab ntsuas kom sai li sai tau. Yog tias lawv yuav tsum tau khaws cia, lawv tuaj yeem khaws cia rau hauv lub tub yees 4oC, tab sis lub sijhawm cia ntawm cov qauv dej yuav tsum tsis pub tshaj 7 hnub. Txhawm rau ua kom qhov ntsuas ntsuas tau raug raws li qhov ua tau, thaum ntsuas cov qauv dej nrog cov txiaj ntsig SS siab xws li aeration tov kua, qhov ntim ntawm cov qauv dej tuaj yeem raug txo kom tsim nyog; thaum thaum ntsuas cov qauv dej uas tsis tshua muaj SS qhov tseem ceeb xws li theem nrab sedimentation tank effluent, qhov ntsuas dej ntim tuaj yeem tsim nyog. Xws li ntim.
Thaum ntsuas qhov concentration ntawm sludge nrog cov nqi siab SS xws li rov qab sludge, txhawm rau tiv thaiv cov xov xwm lim xws li lim membrane lossis lim ntawv los ntawm kev cuam tshuam cov khib nyiab ntau dhau thiab nkag mus rau dej ntau dhau, lub sijhawm ziab yuav tsum tau txuas ntxiv. Thaum ntsuas qhov hnyav tas li, nws yuav tsum tau them sai sai rau qhov hnyav npaum li cas hloov. Yog tias qhov hloov pauv loj heev, nws feem ntau txhais tau hais tias SS ntawm lub lim membrane yog qhuav rau sab nraud thiab ntub rau sab hauv, thiab lub sijhawm ziab yuav tsum tau txuas ntxiv.
Post lub sij hawm: Oct-12-2023
