摘要：研究了連續流(liu)(liu)(liu)復三維電(dian)(dian)極-生物膜反(fan)(fan)應器在(zai)(zai)不(bu)同電(dian)(dian)流(liu)(liu)(liu)、溫度(du)(du)和(he)(he)pH條(tiao)件下的(de)(de)(de)(de)(de)反(fan)(fan)硝(xiao)(xiao)(xiao)化性(xing)能.結果(guo)表明(ming),在(zai)(zai)電(dian)(dian)流(liu)(liu)(liu)從(cong)(cong)0mA增(zeng)加至100mA的(de)(de)(de)(de)(de)過(guo)程(cheng)中(zhong)(zhong),NO3--N去(qu)(qu)(qu)除(chu)率隨電(dian)(dian)流(liu)(liu)(liu)增(zeng)大而升(sheng)高(gao);電(dian)(dian)流(liu)(liu)(liu)為100mA時(shi)(shi)NO3--N去(qu)(qu)(qu)除(chu)率最高(gao),達到(dao)了73.8%,出(chu)水NO3--N濃(nong)度(du)(du)為8.27mg·L-1;電(dian)(dian)流(liu)(liu)(liu)高(gao)于100mA時(shi)(shi),NO3--N去(qu)(qu)(qu)除(chu)率略有下降(jiang).電(dian)(dian)流(liu)(liu)(liu)從(cong)(cong)0mA增(zeng)加至150mA的(de)(de)(de)(de)(de)過(guo)程(cheng)中(zhong)(zhong),NO2--N積(ji)累量先增(zeng)加后減少;電(dian)(dian)流(liu)(liu)(liu)為60mA時(shi)(shi)NO2--N的(de)(de)(de)(de)(de)積(ji)累最為嚴重.溫度(du)(du)為31~35℃時(shi)(shi),反(fan)(fan)硝(xiao)(xiao)(xiao)化效(xiao)果(guo)較(jiao)好,出(chu)水NO3--N濃(nong)度(du)(du)低于10mg·L-1;溫度(du)(du)為35℃時(shi)(shi),NO3--N去(qu)(qu)(qu)除(chu)率最高(gao),達到(dao)了85.5%.pH值為7.2~8.2時(shi)(shi),反(fan)(fan)硝(xiao)(xiao)(xiao)化效(xiao)果(guo)較(jiao)為理想,出(chu)水NO3--N濃(nong)度(du)(du)在(zai)(zai)10mg·L-1以下,NO2--N濃(nong)度(du)(du)低于1mg·L-1.該反(fan)(fan)應器具(ju)有較(jiao)好的(de)(de)(de)(de)(de)pH緩沖性(xing)能,進水pH從(cong)(cong)5.5上升(sheng)至9.0的(de)(de)(de)(de)(de)過(guo)程(cheng)中(zhong)(zhong),其(qi)出(chu)水pH可維持在(zai)(zai)7.6~8.2,NO3--N去(qu)(qu)(qu)除(chu)率在(zai)(zai)59.6%~80.2%.此(ci)外,電(dian)(dian)流(liu)(liu)(liu)、溫度(du)(du)和(he)(he)進水pH還對氨氮(dan)的(de)(de)(de)(de)(de)生成量和(he)(he)總磷(lin)的(de)(de)(de)(de)(de)去(qu)(qu)(qu)除(chu)產生明(ming)顯影響.通過(guo)復三維電(dian)(dian)極-生物膜反(fan)(fan)應器與純電(dian)(dian)化學反(fan)(fan)應器的(de)(de)(de)(de)(de)對比試驗(yan),對氨氮(dan)產生和(he)(he)總磷(lin)去(qu)(qu)(qu)除(chu)的(de)(de)(de)(de)(de)可能原因進行(xing)了分析和(he)(he)探討(tao).

關鍵詞：復三維電極-生物(wu)膜反應器，反硝化，除磷，電流，溫度(du)，pH

飲(yin)用(yong)(yong)水中的(de)(de)(de)硝(xiao)(xiao)(xiao)酸(suan)鹽(yan)污染(ran)已成(cheng)(cheng)為(wei)比較(jiao)(jiao)普遍(bian)的(de)(de)(de)環境污染(ran)問題.研究發(fa)現,高(gao)濃度硝(xiao)(xiao)(xiao)酸(suan)鹽(yan)會誘發(fa)藍嬰病及其它癌(ai)癥的(de)(de)(de)產生,對人類的(de)(de)(de)身(shen)體健(jian)康構成(cheng)(cheng)了巨大威脅.目前,常用(yong)(yong)的(de)(de)(de)脫(tuo)除飲(yin)用(yong)(yong)水中硝(xiao)(xiao)(xiao)酸(suan)鹽(yan)的(de)(de)(de)方法(fa)是異養生物反(fan)(fan)硝(xiao)(xiao)(xiao)化(hua),但該方法(fa)一般需要投加(jia)有(you)機(ji)物(如(ru)甲醇、乙醇、醋酸(suan)等),因而(er)處理成(cheng)(cheng)本較(jiao)(jiao)高(gao),另(ling)一方面所投加(jia)有(you)機(ji)物的(de)(de)(de)性質還會影(ying)響(xiang)微(wei)生物產率,并產生大量(liang)的(de)(de)(de)生物污泥.同(tong)時,若(ruo)有(you)機(ji)基質投加(jia)不(bu)足(zu),易(yi)導致水中亞硝(xiao)(xiao)(xiao)酸(suan)鹽(yan)氮的(de)(de)(de)積累,若(ruo)投加(jia)過量(liang),則(ze)殘留的(de)(de)(de)有(you)機(ji)基質會造(zao)成(cheng)(cheng)二(er)次污染(ran).近年來,國(guo)內外學(xue)者開(kai)發(fa)了電(dian)極-生物膜脫(tuo)硝(xiao)(xiao)(xiao)反(fan)(fan)應器(qi),該反(fan)(fan)應器(qi)利用(yong)(yong)電(dian)化(hua)學(xue)和生物化(hua)學(xue)的(de)(de)(de)耦合(he)作(zuo)用(yong)(yong),采用(yong)(yong)自(zi)然(ran)吸附法(fa)或固定化(hua)技術在陰(yin)極表面培養自(zi)養反(fan)(fan)硝(xiao)(xiao)(xiao)化(hua)細菌(jun),在低壓直流電(dian)作(zuo)用(yong)(yong)下(xia),陰(yin)極表面的(de)(de)(de)反(fan)(fan)硝(xiao)(xiao)(xiao)化(hua)菌(jun)以電(dian)解水產生的(de)(de)(de)氫氣為(wei)電(dian)子(zi)供體,發(fa)生反(fan)(fan)硝(xiao)(xiao)(xiao)化(hua)反(fan)(fan)應將(jiang)硝(xiao)(xiao)(xiao)酸(suan)鹽(yan)氮還原,因此,被人們認為(wei)是適(shi)合(he)處理飲(yin)用(yong)(yong)水中硝(xiao)(xiao)(xiao)酸(suan)鹽(yan)的(de)(de)(de)生物脫(tuo)氮新工(gong)藝之一.

電(dian)(dian)(dian)化(hua)(hua)學(xue)反(fan)應(ying)(ying)(ying)是(shi)一(yi)種在電(dian)(dian)(dian)極(ji)(ji)表(biao)面上進(jin)行(xing)(xing)的(de)非均相反(fan)應(ying)(ying)(ying),反(fan)應(ying)(ying)(ying)物(wu)(wu)必須到達反(fan)應(ying)(ying)(ying)界面才能參(can)與反(fan)應(ying)(ying)(ying).單極(ji)(ji)電(dian)(dian)(dian)化(hua)(hua)學(xue)生物(wu)(wu)膜(mo)反(fan)應(ying)(ying)(ying)器由(you)于電(dian)(dian)(dian)極(ji)(ji)面積較(jiao)小,一(yi)般存(cun)在硝(xiao)氮(dan)去(qu)除率(lv)較(jiao)低、水力停留時(shi)間(jian)長、亞硝(xiao)氮(dan)積累嚴重等(deng)問題.而(er)在傳(chuan)統(tong)二維電(dian)(dian)(dian)解槽中(zhong)裝填一(yi)定(ding)體(ti)積的(de)規則填料使之成為(wei)三(san)(san)維電(dian)(dian)(dian)極(ji)(ji)反(fan)應(ying)(ying)(ying)器,可以(yi)(yi)增大(da)電(dian)(dian)(dian)極(ji)(ji)表(biao)面積,促(cu)進(jin)反(fan)應(ying)(ying)(ying)物(wu)(wu)的(de)遷移(yi),有效提(ti)(ti)高反(fan)應(ying)(ying)(ying)速度,減少水力停留時(shi)間(jian).此外,范彬等(deng)的(de)研究(jiu)也證實三(san)(san)維電(dian)(dian)(dian)極(ji)(ji)系統(tong)可以(yi)(yi)極(ji)(ji)大(da)地提(ti)(ti)高電(dian)(dian)(dian)流(liu)效率(lv).因(yin)此,筆者(zhe)自行(xing)(xing)設計了一(yi)套以(yi)(yi)活性炭和(he)石(shi)灰石(shi)的(de)混合物(wu)(wu)為(wei)填料的(de)復(fu)三(san)(san)維電(dian)(dian)(dian)極(ji)(ji)-生物(wu)(wu)膜(mo)反(fan)應(ying)(ying)(ying)器,在對(dui)其接種并(bing)培養馴化(hua)(hua)約40d后,研究(jiu)不(bu)同電(dian)(dian)(dian)流(liu)、溫度和(he)進(jin)水pH對(dui)反(fan)應(ying)(ying)(ying)器反(fan)硝(xiao)化(hua)(hua)性能的(de)影響,確定(ding)適(shi)宜(yi)的(de)運行(xing)(xing)參(can)數,并(bing)探討進(jin)出(chu)水總磷(lin)濃度的(de)變化(hua)(hua),以(yi)(yi)期開發更高效的(de)電(dian)(dian)(dian)極(ji)(ji)-生物(wu)(wu)膜(mo)反(fan)應(ying)(ying)(ying)器.

  使用微信“掃一掃”功能添加“谷騰環保網”

相關文章