本文關(guān)鍵詞： 微生物燃料電池 底物 電化學(xué)反應(yīng) 電能管理系統(tǒng)　出處：《天津工業(yè)大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：微生物燃料電池(Microbial fuel cell,MFC)是利用微生物作為催化劑降解底物產(chǎn)生電能的生物處理技術(shù),可以實(shí)現(xiàn)廢水能源化。針對(duì)不同水質(zhì)及負(fù)荷下MFC產(chǎn)電性能的差異,本文采用不同廢水作為MFC的底物進(jìn)行產(chǎn)電研究,為產(chǎn)電優(yōu)化提供理論依據(jù);針對(duì)電能低難于利用問(wèn)題,本文采用電能管理系統(tǒng)(Power management system,PMS)收集MFC的電能,為MFC實(shí)用化技術(shù)提供新的解決方案。本文研究了人工配水、生活污水、啤酒廢水對(duì)MFC產(chǎn)電性能的影響:包括底物對(duì)MFC啟動(dòng)期產(chǎn)電性能、COD去除率和庫(kù)倫效率(Coulombic efficiency,CE)、電極電位、動(dòng)力學(xué)過(guò)程、極化曲線和功率密度的影響,然后通過(guò)PMS收集MFC電能,實(shí)現(xiàn)間歇高電壓、高功率輸出。主要結(jié)論如下:(1)人工配水、生活污水、啤酒廢水均可以啟動(dòng)MFC,穩(wěn)定電壓依次為0.60V、0.56V、0.44V。底物種類(lèi)、電導(dǎo)率對(duì)啟動(dòng)期穩(wěn)定電壓有影響。以人工配水為對(duì)照,生活污水電導(dǎo)率高,電荷轉(zhuǎn)移內(nèi)阻、溶液內(nèi)阻小,底物利用率高,電壓與人工配水相當(dāng)。啤酒廢水電導(dǎo)率低,電荷轉(zhuǎn)移內(nèi)阻、溶液內(nèi)阻大,底物利用率低,電壓低于人工配水。(2)底物COD濃度對(duì)MFC產(chǎn)電性能有影響。底物濃度增加時(shí),產(chǎn)電微生物活性增強(qiáng),陽(yáng)極氧化電位降低,陰極還原電位升高,總電位增加,氧化還原能力增強(qiáng),底物利用率高。濃度變化時(shí),陽(yáng)極電位增幅大于陰極電位增幅,陽(yáng)極電位是影響MFC產(chǎn)電的主要因素。(3)底物種類(lèi)、電導(dǎo)率與MFC產(chǎn)電性能有著密切的關(guān)系。以人工配水為對(duì)照,生活污水MFC的COD去除率高,底物利用率高,溶液傳質(zhì)內(nèi)阻小,產(chǎn)電能力高,溶液中傳質(zhì)是影響產(chǎn)電的主要因素;啤酒廢水MFC的COD去除效率低,底物利用率低導(dǎo)致電荷轉(zhuǎn)移內(nèi)阻大,電導(dǎo)率低引起溶液內(nèi)阻大,溶液中傳質(zhì)、電極表面的電化學(xué)反應(yīng)是影響產(chǎn)電的主要因素。(4)采用PMS后,MFC的放電電壓范圍為1.60-2.00V,輸出功率范圍為2.56-4.00mW,為擴(kuò)大MFC的應(yīng)用范圍、較低電壓輸出的問(wèn)題提供了解決方案。
[Abstract]:Microbial fuel cell (MFCs) is a biological treatment technology that uses microorganism as a catalyst to degrade the substrate to produce electric energy, which can realize the energy conversion of wastewater. According to the difference of electric performance of MFC under different water quality and load, In this paper, different waste water is used as the substrate of MFC to study power generation, which provides the theoretical basis for power generation optimization. In order to solve the problem of low and difficult utilization of electric energy, the power management system is used to collect the electric energy of MFC. In this paper, the effects of artificial water distribution, domestic sewage and beer wastewater on the electrical properties of MFC were studied, including the removal rate of MFC and Coulombic efficiency of Coulombic efficiency and electrode potential. Dynamic process, polarization curve and influence of power density, and then collect MFC electric energy through PMS to realize intermittent high voltage and high power output. The main conclusions are as follows: 1) artificial water distribution, domestic sewage, All the beer wastewater can start MFC, and the stable voltage is 0.60V / 0.56V / 0.44V. the type of substrate and the conductivity have influence on the stable voltage during start-up. Compared with artificial water, domestic sewage has high conductivity, charge transfer resistance, low internal resistance of solution and high utilization of substrate. The voltage is equivalent to that of artificial water. Beer wastewater has low conductivity, charge transfer resistance, large solution resistance, low substrate utilization, and lower voltage than artificial water. 2) the concentration of COD in the substrate has an effect on the electrical properties of MFC. The activity of electroproducing microorganism increased, the anodic oxidation potential decreased, the cathodic reduction potential increased, the total potential increased, the redox ability increased, and the substrate utilization rate was high. When the concentration changed, the increase of anode potential was greater than that of cathode potential. Anode potential is the main factor affecting the generation of MFC. The electrical conductivity is closely related to the electrical properties of MFC. Compared with artificial water, the COD removal rate of domestic sewage MFC is high, the substrate utilization ratio is high, and the internal resistance of solution mass transfer is small. The removal efficiency of MFC in beer wastewater is low, the low substrate utilization ratio leads to the large internal resistance of charge transfer, the low conductivity leads to the internal resistance of solution and the mass transfer in the solution. The electrochemical reaction on the electrode surface is the main factor affecting the generation of electricity. (4) the discharge voltage range of PMS is 1.60-2.00 V and the output power range is 2.56-4.00 MW, which provides a solution to the problem of expanding the application range of MFC and lower voltage output.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM911.45

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