本文關(guān)鍵詞： 微生物燃料電池 共基質(zhì) 甲基橙 硝酸鹽 產(chǎn)電　出處：《合肥工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：本文通過(guò)構(gòu)建共基質(zhì)型微生物燃料電池(microbial fuel cell,MFC)在陽(yáng)極室降解甲基橙,研究甲基橙的降解途徑和中間產(chǎn)物,重點(diǎn)關(guān)注運(yùn)行過(guò)程中陽(yáng)極的關(guān)鍵條件與參數(shù)對(duì)甲基橙脫色和產(chǎn)電特性的影響。在此基礎(chǔ)上,進(jìn)一步將非生物陰極更換為生物陰極,分析其用于同步降解硝酸鹽和甲基橙的可行性。主要結(jié)論如下:本研究構(gòu)建的MFC,以甲基橙和葡萄糖的混合基質(zhì)為燃料,最大輸出電壓為0.51 V,甲基橙脫色率能高達(dá)96.38%。對(duì)脫色液進(jìn)行液相色譜-質(zhì)譜(liquid chromatograph mass spectrometer,LC-MS)檢測(cè),得出主要中間產(chǎn)物為對(duì)氨基苯磺酸和氮氮二甲基對(duì)苯二胺。本研究探討了陽(yáng)極的關(guān)鍵參數(shù)對(duì)MFC的甲基橙脫色以及產(chǎn)電性能的影響。結(jié)果顯示低濃度(100-300 mg/L)的甲基橙對(duì)MFC的電壓輸出影響不大,微生物對(duì)低濃度甲基橙存在一定程度的耐受性;當(dāng)甲基橙初始濃度為300 mg/L,得出最佳共基質(zhì)濃度為500 mg/L,用以滿足甲基橙的脫色以及微生物的生長(zhǎng)需求;pH可以影響微生物的活性從而會(huì)改變甲基橙的脫色性能,當(dāng)陽(yáng)極液的pH為6.80時(shí),微生物的代謝作用最強(qiáng),故MFC的脫色效果最佳,脫色率在12 h已經(jīng)超過(guò)了90.00%,化學(xué)需氧量(chemical oxygen demand,COD)去除率達(dá)到57.25%;外接電阻較低會(huì)加快電子的傳遞,同時(shí)甲基橙脫色率和COD去除率能達(dá)到較高的水平;高溫對(duì)MFC系統(tǒng)的脫色和產(chǎn)電性能產(chǎn)生明顯的影響,當(dāng)運(yùn)行溫度為35℃時(shí),MFC的產(chǎn)電和脫色效果最好;MFC脫色甲基橙主要是依靠陽(yáng)極表面附著的微生物的新陳代謝,但是一定量的懸浮污泥不僅能增加輸出電壓,還能提高甲基橙的脫色率和COD的去除率。當(dāng)初期構(gòu)建的共基質(zhì)型MFC的各性能處于穩(wěn)定狀態(tài)后,改為還原硝酸鹽的共基質(zhì)型生物陰極MFC,并得到以下結(jié)果:當(dāng)陰極硝酸鹽濃度為50 mg/L時(shí),該生物陰極MFC的平均的反硝化速率能達(dá)到2.015 mg/(L?d),最高輸出電壓為0.3 V,反應(yīng)48 h甲基橙脫色率能達(dá)到72.36%,COD去除率為43.24%。本研究構(gòu)建的共基質(zhì)型MFC可以有效的降解甲基橙,在此基礎(chǔ)上構(gòu)建的共基質(zhì)型生物陰極MFC,可以在陰陽(yáng)兩室同步降解污染物并達(dá)到產(chǎn)電目的,具有無(wú)污染、應(yīng)用范圍廣、電池效率高等特點(diǎn),為偶氮染料廢水的處理提供了一個(gè)全新的思路。
[Abstract]:In this paper, the degradation pathway and intermediate product of methyl orange in anodic chamber were studied by constructing co-substrate microbial fuel cell. The influence of the key conditions and parameters of the anode on the decolorization and electrical characteristics of methyl orange is focused on. On this basis, the abiotic cathode is further replaced by a biological cathode. The feasibility of simultaneous degradation of nitrate and methyl orange was analyzed. The main conclusions were as follows: the MFC was constructed using the mixed matrix of methyl orange and glucose as fuel. The maximum output voltage is 0. 51 V, and the decolorization rate of methyl orange can reach 96.38. The liquid chromatography-mass spectrometry (LC-MS) is used to detect the decolorization solution by liquid chromatography-mass spectrometry (LC-MS). The main intermediate products were p-aminobenzenesulfonic acid and nitrogen-dimethyl p-phenylenediamine. The effect of the key parameters of anode on decolorization and electrical properties of methyl orange of MFC was investigated. The results showed that the concentration of methyl orange was 100-300 mg / L of low concentration. It has little effect on the voltage output of MFC. The microbes had some tolerance to low concentration methyl orange. When the initial concentration of methyl orange is 300 mg / L, the optimum co-substrate concentration is 500 mg / L, which can be used to meet the decolorization of methyl orange and the growth demand of microorganisms. When the pH value of anodic solution was 6.80, the metabolism of microorganism was the strongest, so the decolorization rate of MFC was the best, the decolorization rate exceeded 90.00. the removal rate of chemical oxygen and COD reached 57.25%, and the low external resistance accelerated the electron transfer. At the same time, the decolorization rate of methyl orange and the removal rate of COD can reach a higher level, and the high temperature has a significant effect on the decolorization and electrical properties of MFC system. When the operating temperature is 35 鈩，

本文編號(hào)：1527484