本文選題：生物電解池 + 氨氧化�。� 參考：《應用與環(huán)境生物學報》2014年06期

【摘要】：以不銹鋼筒作為陰極、碳氈作為陽極,陰陽極間利用無紡布作為隔膜構建單室生物電解池,以氨作為唯一電子供體,接入混合菌群,通過恒定不同的陽極電勢,考察不同初始濃度氨氮在生物電解池內(nèi)的氧化與產(chǎn)物的生成情況.結果表明,恒定陽極電勢0.2 V(vs Ag/Ag Cl)時,經(jīng)過5 d的運行,初始氨氮濃度200 mg/L、400 mg/L的氨氮去除率分別為30%、35%,氮氣分別積累16.1 m L、17.18 m L,甲烷分別積累1.18 m L、1.46 m L;恒定陽極電勢0.6 V(vs Ag/Ag Cl)時,初始氨氮濃度200 mg/L、400 mg/L,氨氮去除率分別為32.4%、36.6%,分別積累氮氣16.48 m L、17.42 m L,積累甲烷1.3m L、1.52 m L,未檢測到硝態(tài)氮和亞硝態(tài)氮.循環(huán)伏安掃描分析發(fā)現(xiàn),陽極具有明顯的氧化還原峰,且不同的陽極恒定電勢,導致其氧化還原峰出現(xiàn)偏移.通過電鏡掃描,發(fā)現(xiàn)陽極微生物細胞表面具有明顯的褶皺形狀,高通量分析顯示陽極微生物中Geobacter占24.11%,是優(yōu)勢菌群,在陽極氨氧化過程中起到關鍵作用.同時發(fā)現(xiàn)系統(tǒng)中還存在氫營養(yǎng)型產(chǎn)甲烷菌Synergistes(3.8%)以及梭菌Clo stridium(3.8%)和Gordonia(1.85%)等功能微生物.本文研究表明,在生物電解池內(nèi),微生物能夠以氨氮作為電子供體,通過氨氧化脫氮,并產(chǎn)生氫氣和甲烷.
[Abstract]:Using stainless steel tube as cathode, carbon felt as anode, non-woven cloth as diaphragm between cathode and anode, single chamber biological electrolysis cell was constructed. Ammonia was used as sole electron donor, and mixed microflora was connected, and different anode potential was constant. The oxidation of ammonia nitrogen with different initial concentrations and the formation of products in the bioglytic cell were investigated. The results show that the constant anode potential is 0. 2 V (vs Ag/Ag Cl) and runs for 5 days. The initial NH3-N concentration of 200mg / L ~ (400mg / L) was 300.35%, the nitrogen accumulation was 16.1mL ~ (-17.18) mL, the methane concentration was 1.18mL / L ~ (1.46 mL), and the constant anode potential was 0.6V (vs Ag/Ag Cl). The initial ammonia nitrogen concentration was 200 mg / L ~ 400 mg 路L ~ (-1), the removal rate of ammonia nitrogen was 36.4%, the nitrogen accumulation was 16.48 mL / L ~ 17.42 mL, the accumulation of methane was 1.3 m L ~ (-1) ~ 1.52 mL, no nitrate nitrogen and no nitrite nitrogen were detected. Cyclic voltammetry analysis shows that the anode has obvious redox peak and different constant potential of the anode, which results in the deviation of the redox peak. Through scanning electron microscope, it was found that the surface of anodic microorganism had obvious fold shape. High-throughput analysis showed that Geobacter accounted for 24.11% of the anodic microorganism, which was the dominant microflora and played a key role in the anodic ammonia oxidation process. It was also found that functional microorganisms such as Synergistes (3.8%), Clo stridium (3.8%) and Gordonia (1.85%) were found in the system. In this paper, it is shown that in the biological electrolysis cell, the microorganism can use ammonia nitrogen as the electron donor to denitrification through ammonia oxidation, and produce hydrogen and methane.
【作者單位】： 四川大學生命科學學院;中國科學院成都生物研究所;
【基金】：國家自然科學基金項目(31270166)資助~~
【分類號】：X703;TM911.45

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