Cov txheej txheem thev naus laus zis tom qab ib puag ncig cov cuab yeej siv rau kev kho cov roj khib nyiab muaj ntau yam; Cov txheej txheem muaj xws li lub cev adsorption, tshuaj lom neeg nqus, catalytic oxidation, thiab kev kho mob lom. Lub cev adsorption feem ntau siv lub pore qauv ntawm ib qho adsorbent los ntes cov khoom tsis zoo los ntawm cov pa khib nyiab. Kev nqus tshuaj muaj xws li tshuaj lom neeg cov tshuaj tiv thaiv uas hloov cov pa phem hauv cov pa khib nyiab rau hauv cov khoom tsis zoo. Catalytic oxidation siv lub catalyst los pab txhawb oxidative decomposition ntawm cov organic tebchaw nyob rau hauv cov pa khib nyiab rau hauv carbon dioxide thiab dej ntawm qhov kub thiab txias. Kev kho mob lom neeg siv cov kev ua haujlwm metabolic ntawm cov kab mob los hloov cov organic tebchaw hauv cov pa khib nyiab rau hauv cov khoom tsis zoo.
Cov cuab yeej siv no yog qhov tseem ceeb rau kev txo lossis tshem tawm cov pa phem pov tseg uas tsim los ntawm kev tsim khoom, yog li tiv thaiv ib puag ncig huab cua thiab tiv thaiv tib neeg kev noj qab haus huv.