本文關(guān)鍵詞： 厭氧消化 針鐵礦 水力負(fù)荷 甲烷 微生物群落　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】：厭氧產(chǎn)甲烷是有機廢棄物資源化的有效途徑之一,已經(jīng)被廣泛應(yīng)用于處理工業(yè)廢水、城市生活垃圾、農(nóng)業(yè)廢棄物、禽畜糞便等。但目前存在產(chǎn)甲烷效率低、轉(zhuǎn)化速率較慢等缺點。本研究嘗試?yán)米匀唤缰袕V泛存在的針鐵礦為添加劑強化廢水產(chǎn)甲烷過程。以乙酸鈉和葡萄糖和為碳源模擬有機廢水,研究了針鐵礦對有機廢水厭氧產(chǎn)甲烷的作用,考察了不同水力負(fù)荷條件下對連續(xù)流厭氧產(chǎn)甲烷反應(yīng)器消化體系甲烷產(chǎn)量及產(chǎn)甲烷速率的作用,并進(jìn)一步分析了微生物群落演變過程,得到的主要結(jié)論如下:1)在序批式反應(yīng)器中添加針鐵礦或Fe~(3+)/Fe~(2+)能夠促進(jìn)模擬廢水的產(chǎn)甲烷過程,而且針鐵礦的強化作用更高。針鐵礦在系統(tǒng)中的變化不顯著,而添加Fe~(3+)/Fe~(2+)的系統(tǒng)中形成了藍(lán)鐵礦(FePO_4)或菱鐵礦(FeCO_3)。2)在連續(xù)流反應(yīng)器中,當(dāng)水力負(fù)荷為0.91-1.80 g/L/d(葡萄糖)時,針鐵礦的促進(jìn)效果最為顯著。當(dāng)OLR為1.80 g/L/d時,系統(tǒng)產(chǎn)甲烷量以及產(chǎn)甲烷效率最高,添加針鐵礦反應(yīng)器和對照組反應(yīng)器產(chǎn)甲烷量分別為247和209 mL/L/d。3)微生物群落分析結(jié)果顯示,針鐵礦促進(jìn)了反應(yīng)體系中Clostridium(梭菌屬)和Methanothrix(產(chǎn)甲烷絲狀菌屬)的生長,對有機物的產(chǎn)酸發(fā)酵以及產(chǎn)甲烷過程具有促進(jìn)作用。4)不同水力負(fù)荷條件下Methanothrix均為產(chǎn)甲烷古菌的優(yōu)勢菌屬。而細(xì)菌群落分布隨水力負(fù)荷變化波動較大,多數(shù)細(xì)菌為產(chǎn)酸發(fā)酵型菌。針鐵礦反應(yīng)器細(xì)菌的多樣性指數(shù)較高,穩(wěn)定的群落結(jié)構(gòu)可能有利于甲烷的生成。
[Abstract]:Anaerobic methanogenesis is one of the effective ways to recycle organic wastes, which has been widely used in the treatment of industrial wastewater, municipal solid waste, agricultural waste, livestock manure, etc. But at present, methane production efficiency is low. This study attempted to use goethite as additive to enhance the process of waste aquatic methane. Sodium acetate and glucose were used as carbon source to simulate organic wastewater. The effect of goethite on anaerobic methanogenesis of organic wastewater was studied. The effects of different hydraulic loads on methane production and methanogenic rate in digested system of continuous flow anaerobic methanogenic reactor were investigated. The evolution process of microbial community was further analyzed. The main conclusions are as follows: (1) addition of goethite or Fe~(3 / Fean2 in sequencing batch reactor can promote the methanogenic process of simulated wastewater. Moreover, goethite has a higher strengthening effect. The change of goethite in the system is not obvious. However, in the system with the addition of Fe~(3 / Feo ~ (2), the bluestone / FePO4) or siderite / FeCO3 / 2) are formed in the continuous flow reactor. When the hydraulic load is 0.91-1.80 g / L / d (glucose), goethite is the most effective, and the OLR is 1.80 g / L / d. The results of microbial community analysis showed that the methanogenic capacity and methanogenic efficiency of the system were the highest, and the methanogenic capacity of the adding goethite reactor and the control reactor were 247 and 209 mL / L / 3, respectively. Goethite promoted the growth of Clostridium (Clostridium) and Methanothrix (methanothrix) in the reaction system. It can promote acidogenic fermentation and methanogenic process of organic compounds. 4). Under different hydraulic loading conditions, Methanothrix was the dominant genus of methanogenic palaeomycetes, and the distribution of bacteria community fluctuated greatly with hydraulic load. Most of the bacteria were acidogenic fermentative bacteria, and the diversity index of bacteria in goethite reactor was higher, and stable community structure might be beneficial to methane production.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ221.11;X703

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本文編號：1456596