本文關(guān)鍵詞： FFOMNs ZnO MWNTs SMDA 系統(tǒng)　出處：《安徽大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：甲烷化反硝化厭氧氨氧化(SMDA)系統(tǒng)具有產(chǎn)甲烷同時(shí)脫除無(wú)機(jī)氮(NH4+-N、NO2--N和NO3--N)、有機(jī)氮和有機(jī)碳的功能。本文通過(guò)在UASB反應(yīng)器中構(gòu)建SMDA系統(tǒng),探討了不同納米材料(FFOMNs、ZnO和MWNTs)對(duì)SMDA系統(tǒng)運(yùn)行效能、顆粒污泥特性、微生物菌群結(jié)構(gòu)的影響。主要研究結(jié)論如下:(1)UASB反應(yīng)器經(jīng)500天運(yùn)行,完成了 SMDA系統(tǒng)構(gòu)建,穩(wěn)定運(yùn)行和重新啟動(dòng)三個(gè)過(guò)程。在UASB穩(wěn)定運(yùn)行階段,U1(U2)反應(yīng)器中,COD、NH4+-N、NO2--N、N03--N 的去除效率分別為 75%(70%)、48%(44%)、99.99%(99.99%)、99.99%(99.99%);N2和CH4所占比例分別約為75%和25%。(2)SMDA系統(tǒng)主要由產(chǎn)甲烷菌群,反硝化菌群,厭氧氨氧化菌群、發(fā)酵細(xì)菌四種關(guān)鍵營(yíng)養(yǎng)菌群組成。四種關(guān)鍵營(yíng)養(yǎng)菌群可在單一 UASB反應(yīng)器中共存,并形成一種具有多層結(jié)構(gòu)的厭氧顆粒污泥(產(chǎn)甲烷菌在顆粒污泥內(nèi)部,反硝化細(xì)菌和厭氧氨氧化菌在顆粒污泥外層)。(3)300mg/L以內(nèi)的FFOMNs對(duì)SMDA系統(tǒng)基本沒有影響。400mg/L以內(nèi)ZnO納米顆粒對(duì)甲烷化過(guò)程具有抑制作用,隨濃度的增加,抑制作用越強(qiáng),但對(duì)厭氧氨氧化過(guò)程有一定促進(jìn)作用。100、200、和400 mg/L ZnO納米顆粒對(duì)反硝化過(guò)程分別具有促進(jìn)作用、無(wú)明顯影響和抑制作用。MWNTs對(duì)于SMDA系統(tǒng)的影響表現(xiàn)為:低濃度(10 mg/L)起促進(jìn)作用,中濃度(300 mg/L)不起作用,高濃度(1000mg/L)起抑制作用。(4)ZnO和MWNTs能刺激顆粒污泥分泌EPS,從而影響顆粒污泥內(nèi)部結(jié)構(gòu),EPS的分泌量和納米顆粒濃度成正相關(guān)。納米材料使SMDA系統(tǒng)中關(guān)鍵功能菌豐度發(fā)生明顯改變;隨納米材料濃度的增加,產(chǎn)甲烷菌所占比例逐漸增加,而反硝化菌和厭氧氨氧化菌所占比例逐漸減少。
[Abstract]:The methanation and denitrification anaerobic ammonia oxidation (SMDAA) system is characterized by the simultaneous removal of inorganic nitrogen, NH _ 4-N, no _ 2-N and no _ 3-N). The function of organic nitrogen and organic carbon. In this paper, SMDA system was constructed in UASB reactor to discuss the different nano-materials FFOMNs. The effects of ZnO and MWNTs on the performance of SMDA system, the characteristics of granular sludge and the structure of microbial flora were studied. The three processes of SMDA system construction, stable operation and restart were completed. In the UASB stable operation stage, the COD NH _ 4-N no _ 2-N was added to the reactor. The removal efficiency of N03-N is 75%, 70% and 444%, respectively, about 99.99% and 99.9999, and 99.9999 and 99.99%, and 99.99%, 99.99%, 99.99% and 99.99%, respectively. The proportions of N2 and CH4 were about 75% and 25 respectively, which were mainly composed of methanogenic bacteria, denitrifying bacteria and anaerobic ammonia-oxidizing bacteria. The four key nutrient bacteria can coexist in a single UASB reactor and form a multi-layer anaerobic granular sludge (methanogenic bacteria in the granular sludge). Denitrifying bacteria and anaerobic ammonia-oxidizing bacteria in the outer layer of granular sludge. FFOMNs within 300mg / L had no effect on the SMDA system. The ZnO nanoparticles within 400mg / L could inhibit the methanation process. With the increase of concentration, the inhibitory effect is stronger, but it can promote the process of anaerobic ammonia oxidation. And 400 mg/L ZnO nanoparticles promoted the denitrification process, respectively. The effect of MWNTs on SMDA system was as follows: low concentration of 10 mg / L) could promote it, while the medium concentration of 300 mg / L did not. High concentration of 1 000 mg / L could inhibit the secretion of EPSs from granular sludge, thus affecting the internal structure of granular sludge. There was a positive correlation between the secretion of EPS and the concentration of nanoparticles. The abundance of critical functional bacteria in SMDA system was obviously changed by nano-materials. With the increase of nano-material concentration, the proportion of methanogenic bacteria gradually increased, while the proportion of denitrifying bacteria and anaerobic ammonia-oxidizing bacteria gradually decreased.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X703;TB383.1

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