Kev sib xyaw ua ke - Aluminium sulphate vs Poly aluminium chloride

Kev ua kom cov dej khov tsis khov yog cov txheej txheem uas cov khoom me me uas muaj cov nqi tsis zoo uas nyob hauv cov dej khov tsis khov. Qhov no ua tiav los ntawm kev ntxiv cov tshuaj coagulant uas muaj nqi zoo. Cov nqi zoo hauv cov tshuaj coagulant ua rau cov nqi tsis zoo uas nyob hauv dej tsis khov (piv txwv li ua rau nws tsis khov). Thaum cov khoom me me tsis khov lossis tsis khov, cov txheej txheem ua kom cov dej khov tsis khov yuav tshwm sim. Cov khoom me me uas tsis khov yuav sib xyaw ua cov khoom loj dua thiab loj dua kom txog thaum lawv hnyav txaus los ua kom cov dej khov lossis loj txaus los ntes cov pa npuas thiab ntab.

Niaj hnub no peb yuav los saib ze dua txog cov khoom siv flocculation ntawm ob hom flocculants: poly aluminium chloride thiab aluminium sulfate.

Aluminium Sulfate: Aluminium Sulfate yog acidic nyob rau hauv qhov xwm. Lub hauv paus ntsiab lus ua haujlwm ntawm aluminium sulfate yog raws li nram no: aluminium sulfate tsim cov txhuas hydroxide, Al (0H) 3. Aluminium hydroxides muaj pH txwv, saum toj no uas lawv yuav tsis hydrolysis zoo lossis, hydrolyzated aluminium hydroxides settled sai sai ntawm pH siab (piv txwv li pH siab tshaj 8.5), yog li ntawd, qhov ua haujlwm pH yuav tsum tau tswj hwm kom zoo kom nws nyob rau hauv qhov ntau ntawm 5.8-8.5. qhov alkalinity hauv dej yuav tsum txaus thaum lub sijhawm flocculation kom ntseeg tau tias cov insoluble hydroxide tau tsim thiab precipitated tag nrho. Tshem tawm cov xim thiab cov ntaub ntawv colloidal los ntawm kev sib xyaw ua ke ntawm adsorption thiab hydrolysis rau / rau hauv cov hlau hydroxides. Yog li ntawd, qhov ua haujlwm pH qhov rai ntawm aluminium sulfate yog nruj me ntsis 5.8-8.5, yog li nws yog ib qho tseem ceeb heev kom ntseeg tau tias muaj kev tswj hwm pH zoo thoob plaws hauv cov txheej txheem thaum siv aluminium sulfate.

Polyaluminum chloride(PAC) yog ib qho ntawm cov tshuaj kho dej zoo tshaj plaws uas siv niaj hnub no. Nws siv dav hauv kev kho dej haus thiab dej khib nyiab vim nws cov coagulation efficiency siab thiab ntau yam pH thiab kub siv piv rau lwm cov tshuaj kho dej. PAC muaj ntau qib sib txawv nrog alumina concentration txij li 28% txog 30%. Alumina concentration tsis yog tib qho kev xav thaum xaiv qib PAC siv.

PAC suav tau tias yog cov tshuaj coagulant ua ntej hydrolysis. Cov pawg txhuas ua ntej hydrolysis muaj qhov ceev ceev ntawm cov nqi zoo, uas ua rau PAC muaj cationic ntau dua li alum. ua rau nws yog ib qho tshuaj tiv thaiv tsis ruaj khov rau cov khoom tsis huv uas raug tshem tawm hauv dej.

PAC muaj cov txiaj ntsig zoo li nram no dua li txhuas sulfate

1. Nws ua haujlwm ntawm qhov concentration qis dua. Feem ntau, qhov koob tshuaj PAC yog li ib feem peb ntawm qhov koob tshuaj uas xav tau rau alum.

2. Nws tso cov txhuas seem tsawg dua hauv cov dej kho

3. Nws tsim cov sludge tsawg dua

4. Nws ua haujlwm hla ntau yam pH

Muaj ntau hom flocculants, thiab tsab xov xwm no tsuas yog qhia ob hom xwb. Thaum xaiv cov coagulant, koj yuav tsum xav txog qhov zoo ntawm cov dej uas koj kho thiab koj tus kheej cov peev nyiaj. Kuv vam tias koj muaj kev paub txog kev kho dej zoo. Ua tus neeg muab tshuaj kho dej nrog 28 xyoo ntawm kev paub. Kuv zoo siab daws tag nrho koj cov teeb meem (txog cov tshuaj kho dej).