PolyDADMAC: Cov ntsiab lus tseem ceeb ntawm kev tshem cov sludge

Kev ziab cov sludge yog ib feem tseem ceeb ntawm cov txheej txheem kho dej phwj tuaj. Nws lub hom phiaj yog kom tshem tawm cov dej hauv cov sludge kom zoo, kom cov sludge tsawg dua, thiab cov nqi pov tseg thiab qhov chaw av raug txo qis. Hauv cov txheej txheem no, kev xaiv ntawmCov khoom ua kom cov dej khovyog tus yuam sij, thiab PolyDADMAC, ua ib qho kev ua haujlwm zooCationic Polymer flocculant, tab tom ua lub luag haujlwm tseem ceeb zuj zus.

Ua ntej, peb yuav tsum nkag siab txog cov khoom sib xyaw thiab cov khoom ntawm cov sludge. Cov sludge feem ntau yog cov khoom khov uas tsim tawm thaum lub sijhawm kho dej phwj tuaj. Nws muaj cov khoom sib xyaw xws li cov organic debris, cov microbial pawg, cov khoom inorganic thiab colloids. Cov khoom khov uas raug tshem tawm hauv cov sludge raug them tsis zoo thiab sib cais, thaum dej puv nruab nrab ntawm cov khoom khov uas raug tshem tawm, yog li cov dej pib ntawm cov sludge tuaj yeem ncav cuag 95%. Yog tias cov sludge no tsis raug kho raws sijhawm, nws yuav ua rau muaj kev ua qias tuaj rau ib puag ncig. Yog li ntawd, yuav ua li cas thiaj ua tau cov sludge dewatering tau dhau los ua qhov teeb meem tseem ceeb hauv kev kho dej phwj tuaj.

Hauv cov txheej txheem dewatering sludge,Cov tshuaj flocculants rau kev dewatering sludgeyog ib qho tseem ceeb uas cuam tshuam. Cov flocculant sib sau ua ke cov khoom me me hauv cov sludge rau hauv cov khoom loj dua los ntawm kev ua kom tsis muaj zog hluav taws xob, kev sib txuas adsorption, thiab lwm yam, ua kom nws cov txheej txheem sedimentation thiab dehydration sai dua. Raws li cov khoom siv tshuaj lom neeg tshwj xeeb siv hauv kev kho dej khib nyiab thiab sludge dehydration, PolyDADMAC ua tau zoo hauv sludge dehydration vim nws cov qauv molecular tshwj xeeb thiab qhov ceev ntawm cov nqi.

Cov qauv molecular ntawm PolyDADMAC muab nws cov nqi ceev ceev thiab cov khoom zoo heev adsorption. Thaum lub sijhawm sludge dehydration txheej txheem, PolyDADMAC tuaj yeem nqus tau sai sai rau ntawm qhov chaw ntawm cov sludge particles, txo qhov repulsive force ntawm cov khoom me me los ntawm kev hluav taws xob neutralization, thiab txhawb kev tsim cov flocs loj dua ntawm cov khoom me me. Tib lub sijhawm, cov saw molecular ntawm PolyDADMAC kuj tseem tuaj yeem tsim cov qauv network zoo, ntes ntau cov sludge particles ua ke, zawm dej tawm ntawm cov khoom me me sludge, thiab tsim cov clumps uas yooj yim rau dehydrate, yog li ntawd cov dej ntim tuaj yeem txo qis rau 60-80% lossis qis dua, thiab qhov ntim tuaj yeem txo qis los ntawm 75-87%.

Piv nrog cov tshuaj flocculants inorganic ib txwm muaj, PolyDADMAC muaj qhov hnyav molecular thiab qhov ceev ntawm cov khoom siv, ua rau nws muaj peev xwm flocculation zoo dua. Tsis tas li ntawd,PolyDADMACmuaj kev ua haujlwm yaj zoo heev, yooj yim siv, thiab tsis tsim cov pa phem thib ob. PD nws tus kheej tsis tsim cov av qeeg zoo li alum, yog li ntawd cov sludge ntxiv tuaj yeem txo tau. Cov txiaj ntsig no ua rau PolyDADMAC muaj kev cia siab dav dav hauv kev siv sludge dewatering.

Cov qauv molecular ntawm PolyDADMAC muab rau nws qhov ceev ceev thiab cov khoom zoo heev adsorption. Ntau pawg cationic ntawm nws cov saw molecular tuaj yeem cuam tshuam nrog cov pab pawg anionic ntawm qhov chaw ntawm cov khoom sludge los tsim cov ionic bonds ruaj khov, ua rau muaj kev adsorption muaj zog. Qhov adsorption no tsis yog tsuas yog pab txo qhov kev cuam tshuam ntawm cov khoom me me, tab sis kuj pab tsim cov flocs loj dua.

Ntxiv rau qhov qauv molecular thiab cov khoom them ntawm PolyDADMAC, nws qhov kev sib xyaw thiab cov koob tshuaj kuj yog cov yam tseem ceeb uas cuam tshuam rau qhov cuam tshuam ntawm sludge dehydration. Hauv qee qhov ntau, thaum qhov concentration ntawm PolyDADMAC nce lossis cov koob tshuaj nce, qhov kev ua haujlwm dewatering ntawm sludge tuaj yeem txhim kho. Txawm li cas los xij, qhov concentration lossis koob tshuaj siab dhau yuav ua rau muaj qhov cuam tshuam rov qab, ua rau muaj kev tiv thaiv colloid, uas ua rau txo qhov cuam tshuam ntawm dehydration. Yog li ntawd, hauv kev siv ua haujlwm, kev sim thiab kev ua kom zoo dua yuav tsum tau ua raws li cov txheej txheem kho dej phwj tshwj xeeb thiab cov khoom sludge kom txiav txim siab qhov zoo tshaj plaws PolyDADMAC concentration thiab koob tshuaj.