Polyaluminium chloride (PAC) muaj txiaj ntsig zoo hauv kev kho cov dej khib nyiab siab, tab sis nws kuj muaj qee qhov tsis zoo, xws li lub sijhawm pib ua haujlwm ntev, kev tswj hwm qib siab, thiab yooj yim los tsim cov ntxhiab tsw, tshwj xeeb tshaj yog rau cov nplai me me. Qhov no yog qhov tseeb tshwj xeeb ntawm cov txheej txheem engineering. Txawm li cas los xij, nyob rau hauv cov tshuaj tiv thaiv anaerobic, methane fermentation theem nrog lub sij hawm ntev cov tshuaj tiv thaiv thiab kev tswj siab yuav raug tso tseg, thiab cov tshuaj tiv thaiv tuaj yeem tswj tau nyob rau theem acidification, uas muaj cov txiaj ntsig hauv qab no piv nrog cov tshuaj tiv thaiv anaerobic ntawm tag nrho cov txheej txheem:
(1) Txij li thaum cov tshuaj tiv thaiv yog tswj tau sai nyob rau hauv lub hydrolysis thiab acidification theem, lub ntim ntawm hydrolysis tank yog me me;
(2) Tsis tas yuav sau cov khoom siv biogas, uas ua kom yooj yim rau cov qauv, txo tus nqi thiab tswj xyuas;
(3) Lub degradation muaj nuj nqi ntawm cov sludge yog kiag li ib yam nkaus li ntawm cov digester, thiab tus nqi ntawm cov sludge ntau lawm yog me me.
(4) Raws li kev ua ntawm hydrolase, roj molecules tsim glycerol thiab fatty acids, thiab macromolecular organic teeb meem yog decomposed rau hauv me me molecular tshuaj. Tom qab cov tshuaj tiv thaiv hydrolysis, solubility thiab biochemical zog hauv cov dej khib nyiab tau txhim kho, uas yog qhov zoo rau kev siv cov substrates los ntawm cov kab mob thiab siv rau hauv cov metabolism ntawm cov kab mob. Ib qho kev sib txuas tseem ceeb raug txo qis hauv cov txheej txheem, uas yuav ua kom lub cev degradation ntawm cov organic teeb meem thiab tsim kom muaj txiaj ntsig zoo rau kev kho mob lom tom ntej.