本文選題：短程硝化　切入點(diǎn)：完全混合反應(yīng)器　出處：《環(huán)境科學(xué)》2017年08期 　論文類型：期刊論文

【摘要】：為實(shí)現(xiàn)短程硝化的快速啟動(dòng),采用完全混合反應(yīng)器(CSTR)和膜生物反應(yīng)器(MBR)進(jìn)行短程硝化啟動(dòng)性能對(duì)比研究,考察兩個(gè)反應(yīng)器在啟動(dòng)時(shí)間、氮素轉(zhuǎn)化和污泥性能3個(gè)方面的差異.結(jié)果表明在進(jìn)水C/N=1,溫度為30℃±1℃,pH為7.5~8.0,DO為0.6~1.0 mg·L~(-1),結(jié)合缺氧/好氧比為1∶3(15 min∶45 min)和縮短HRT,CSTR和MBR分別運(yùn)行56 d和44 d成功啟動(dòng)短程硝化,MBR啟動(dòng)周期較短.運(yùn)行至第14 d、第28 d和第56 d時(shí),CSTR和MBR亞硝累積率平均為51%、66%、89%和50%、71%、93%,硝酸鹽氮生成速率(以NO_3~--N/MLVSS計(jì))依次為7.4、4.0、1.7和7.6、3.5、1.0 mg·(g·h)~(-1),MBR在第28 d和第56 d表現(xiàn)出較高的亞硝累積率和較低的NO_3~--N產(chǎn)率,有利于短程硝化的快速啟動(dòng).整個(gè)運(yùn)行過程中,兩個(gè)反應(yīng)器內(nèi)的亞硝化污泥均呈黃色,SVI在55~110 mL·g~(-1),MLVSS/MLSS穩(wěn)定在0.6~0.8左右,良好的污泥性能為CSTR和MBR短程硝化的快速啟動(dòng)創(chuàng)造了有利條件.MBR在短程硝化快速啟動(dòng)中展現(xiàn)出更明顯的優(yōu)勢(shì).
[Abstract]:In order to realize the rapid start-up of short-cut nitrification, a comparative study on the start-up performance of short-cut nitrification was carried out by using the complete mixed reactor (CSTR) and the membrane bioreactor (MBR). The start-up time of the two reactors was investigated. The results showed that the nitrogen conversion and sludge performance were different in the influent C / N ~ (-1), pH = 7.5 鈩，

本文編號(hào)：1623018