Flocculation thiab sedimentation suav nrog ntxiv cov tshuaj aqueous ntawm ib qho inorganic flocculant (xws li txhuas sulfate) thiab cov organic anionic flocculant, polyacrylamide (PAM), rau cov dej khib nyiab. Qhov no ua rau compression ntawm hluav taws xob ob txheej, destabilizing tshem tawm cov khoom hauv cov dej khib nyiab. Cov khoom sib sau ua ke, nce hauv qhov loj thiab tsim flocs. Thaum cov flocs ncav cuag ib qho me me, lawv tshem tawm los ntawm theem aqueous thiab nyob hauv qab lub ntiajteb txawj nqus, yog li tshem tawm cov khib nyiab loj ntawm cov dej khib nyiab thiab ua tiav cov dej kho. Txhawm rau txhim kho kev sib cais, cov khoom siv coagulant tuaj yeem raug ntxiv kom tsim nyog thiab nyob rau lub sijhawm tsim nyog. Cov dej khib nyiab kho feem ntau ua tau raws li cov qauv tso tawm hauv cov ntsiab lus ntawm cov xim, cov ntsiab lus chromium, thiab cov ntsiab lus tshem tawm cov khib nyiab, thiab tuaj yeem tso tawm los yog siv los ua cov dej rov ua dej hauv cov dej dag rau cov roj rov qab.
Flocculants tam sim no yog cov neeg siv ntau tshaj plaws hauv kev kho dej khib nyiab, thiab cov txheej txheem flocculation yog ib qho tseem ceeb ntawm cov txheej txheem kev kho dej khib nyiab. Raws li lawv cov tshuaj muaj pes tsawg leeg, flocculants tuaj yeem muab faib ua: inorganic ntsev flocculants, organic polymer flocculants, thiab microbial flocculants. Cov neeg siv tuaj yeem xaiv hom tsim nyog raws li cov khoom ntawm lawv cov dej khib nyiab. Kev sib xyaw ua ke ntawm flocculants thiab cov khoom siv kho dej khib nyiab txhim kho kev kho cov dej khib nyiab, zoo daws teeb meem kev kho dej khib nyiab.
Daim ntawv thov ntawm flocculants hauv kev kho dej khib nyiab tau zoo nce qhov kev kho dej khib nyiab, ua rau muaj kev kho mob tseem ceeb. Tam sim no, tus neeg sawv cev no tau siv dav hauv kev kho dej khib nyiab thoob plaws ntau qhov kev lag luam, kom ntseeg tau tias cov dej zoo tom qab kev kho los ntawm loj - cov khoom siv kho dej khib nyiab ua tau raws li lub teb chaws cov qauv, tiv thaiv kom tsis txhob muaj kuab paug hauv dej thiab ua kom muaj kev txhim kho ecological.
Ntxiv cov organic polymeric flocculants los kho cov roj refining cov dej khib nyiab tso cai rau kev sib cais sai thiab meej ntawm cov dej los ntawm impurities.
