一體化生活污水處理設備去(qu)除(chu)有(you)(you)機(ji)物(wu)(wu)(wu)(wu)污染(ran)物(wu)(wu)(wu)(wu)及氨氮(dan)主要依賴于設備中(zhong)的(de)AO生(sheng)(sheng)物(wu)(wu)(wu)(wu)處理(li)工藝。其(qi)中(zhong)工作(zuo)原理(li)是在A級，由于污水有(you)(you)機(ji)物(wu)(wu)(wu)(wu)濃度很高，微(wei)生(sheng)(sheng)物(wu)(wu)(wu)(wu)處于缺氣狀(zhuang)態，此(ci)時微(wei)生(sheng)(sheng)物(wu)(wu)(wu)(wu)為兼性微(wei)生(sheng)(sheng)物(wu)(wu)(wu)(wu), 它們(men)將污水中(zhong)的(de)有(you)(you)機(ji)氮(dan)轉(zhuan)化(hua)(hua)(hua)分解(jie)成(cheng)(cheng)(cheng)NH-N,同時利(li)用(yong)有(you)(you)機(ji)物(wu)(wu)(wu)(wu)作(zuo)為電子供(gong)體,將NO-N，NO-N轉(zhuan)化(hua)(hua)(hua)成(cheng)(cheng)(cheng)N,而且還利(li)用(yong)部分有(you)(you)機(ji)碳源和(he)NH-N合成(cheng)(cheng)(cheng)新的(de)細胞(bao)物(wu)(wu)(wu)(wu)質，所以A級池(chi)不僅(jin)具有(you)(you)一(yi)定的(de)有(you)(you)機(ji)物(wu)(wu)(wu)(wu)去(qu)除(chu)功(gong)能(neng),減輕后(hou)續好氧池(chi)的(de)有(you)(you)機(ji)負荷,以利(li)于消化(hua)(hua)(hua)作(zuo)用(yong)的(de)進(jin)行,而且依靠(kao)原水中(zhong)存在的(de)較高濃度有(you)(you)機(ji)物(wu)(wu)(wu)(wu),完成(cheng)(cheng)(cheng)反消化(hua)(hua)(hua)作(zuo)用(yong)。