Qhov muaj pes tsawg leeg ntawm cov dej khib nyiab yog cov khoom siv nyuaj thiab nyuaj rau kev kho. Cov kev kho mob feem ntau suav nrog oxidation, adsorption, membrane sib cais, flocculation, biodegradation, thiab lwm yam.
Cov hau kev no muaj qhov zoo thiab qhov tsis zoo, uas tau siv cov pa roj carbon monoxide thiab siv cov pa roj carbon monoxide thiab siv cov pa roj carbon monoxideative, thiab ob peb txoj kev tshawb fawb siv cov pa roj carbon ntau nyob ib leeg.
Ua kom cov pa roj carbon ua kom muaj txiaj ntsig zoo rau ntawm cov dej khib nyiab. Tus nqi tshem tawm tus nqi ntawm cov quav dej ntws tawm ntau dua nrog kev nce qib kub thiab pH tsis cuam tshuam rau cov nyhuv zas xim.