Oxygen xav tau yog tus nqi ntawm cov pa siv thaum lub sij hawm decomposition ntawm cov organic teeb meem rau hauv yooj yim, ruaj khov inorganic teeb meem los ntawm cov kab mob. Aerobic organics yog cov khoom hauv dej uas tuaj yeem haus cov pa oxygen los ntawm cov txheej txheem biochemical thiab tshuaj. Qhov ntau cov organic pollutants nyob rau hauv lub cev dej, ntau dua oxygen noj, thiab qhov hnyav dua cov organic pollution degree ntawm dej lub cev.
