本文選題：硫酸根 + A~2/O工藝　； 參考：《河南工業(yè)大學(xué)》2017年碩士論文

【摘要】：A~2/O工藝是由Marais和Rabinowitz提出的,并率先在歐洲運(yùn)行,且脫氮效果良好,隨后被引入國(guó)內(nèi)。但是該工藝在國(guó)內(nèi)運(yùn)行很難達(dá)到與歐洲相同的運(yùn)行效果。調(diào)查歐洲以及國(guó)內(nèi)廢水中各物質(zhì)的含量發(fā)現(xiàn):歐洲生活污水水質(zhì)中硫酸根含量普遍較高,而國(guó)內(nèi)生活污水水質(zhì)中硫酸根含量普遍較低。受地域以及季節(jié)的影響,硫酸根的含量差異很大,國(guó)內(nèi)A~2/O工藝運(yùn)行效果不佳可能與進(jìn)水硫酸根含量偏低有關(guān)。本文通過在實(shí)驗(yàn)室建立A~2/O實(shí)驗(yàn)裝置,連續(xù)運(yùn)行模擬污水處理廠開放的水處理環(huán)境,力爭(zhēng)達(dá)到與污水處理廠一樣的處理效果。配制不同濃度的硫酸根廢水,研究硫酸根濃度與總氮去除率之間是否存在相關(guān)性。通過研究本課題,論證A~2/O工藝中硫酸根對(duì)于總氮去除的影響,豐富A~2/O脫氮過程的影響因素,即適宜高濃度的進(jìn)水硫酸根會(huì)使A~2/O工藝總氮的去除率得到提高。間接證明為什么A~2/O工藝在歐洲的運(yùn)行效果比國(guó)內(nèi)要好。本研究也對(duì)A~2/O工藝好氧池低氧條件下運(yùn)行的脫氮處理過程中可能存在的機(jī)理進(jìn)行了探索研究,包括可能存在的硫酸鹽型厭氧氨氧化作用、同步脫硫反硝化等。通過大量的實(shí)驗(yàn)研究,我們論證了A~2/O工藝厭氧池是否存在SO42-和NH4+的反應(yīng)。硫酸根在厭氧條件下氧化氨態(tài)氮,自身被還原為低價(jià)硫化物。而低價(jià)硫化物則伴隨污泥一起進(jìn)入后續(xù)的反硝化單元,作為電子供體,完成后期的脫氮。硫酸根每氧化1kg的氨氮,可以凈產(chǎn)生1.71kg的COD。這意味著硫酸鹽型厭氧氨氧化過程可以提供多余的碳源供給后續(xù)的反硝化單元,有助于解決生活污水處理過程中常見的碳源不足問題。中國(guó)乃至世界絕大多數(shù)地區(qū)都面臨著缺乏碳源而導(dǎo)致總氮超標(biāo)繼而出現(xiàn)湖泊水庫(kù)的富營(yíng)養(yǎng)化問題,此反應(yīng)的研究無疑具有重要意義。綜上所述,本研究圍繞硫酸根濃度對(duì)A~2/O工藝脫氮處理的影響,并對(duì)硫酸根參與下A~2/O工藝脫氮機(jī)理問題開展研究。證實(shí)了生活污水也可能發(fā)生硫酸鹽型厭氧氨氧化,研究結(jié)果表明適宜濃度的硫酸根離子能夠夠提高A~2/O工藝去除總氮的能力,為后期進(jìn)一步開發(fā)利用奠定了基礎(chǔ)。
[Abstract]:An 2 / O process was proposed by Marais and Rabinowitz and was first run in Europe with good denitrification effect and then introduced into China. However, it is difficult to achieve the same operation effect as Europe in domestic operation. It is found that the content of sulphate in European domestic wastewater is higher than that in domestic wastewater, but it is generally low in domestic wastewater. Due to the influence of region and season, the content of sulphate is very different, and the low content of sulphate in influent may be related to the poor operation effect of A2 / O process in China. In this paper, through the establishment of an A2 / O experimental device in the laboratory, continuous operation of simulated wastewater treatment plant open water treatment environment, and strive to achieve the same treatment effect as sewage treatment plant. The correlation between sulfate concentration and total nitrogen removal rate was studied. By studying this topic, the effect of sulphate on total nitrogen removal in An 2 / O process is demonstrated, and the factors affecting the nitrogen removal process are enriched. That is, the removal rate of total nitrogen in An 2 / O process can be improved by suitable high concentration of influent sulfate radical. Indirectly, the A2 / O process works better in Europe than at home. The possible mechanism of denitrification in aerobic tank under low oxygen condition was also studied, including the possible sulphate anaerobic ammonia oxidation and simultaneous desulfurization and denitrification. Through a large number of experimental studies, we have demonstrated whether there is a reaction between so _ 4 _ 2- and NH4 in the anaerobic tank of An _ 2 / O process. Sulfate oxidizes ammonia nitrogen under anaerobic conditions and is reduced to low-valent sulfides. Low-valent sulfides enter the subsequent denitrification unit along with the sludge and act as an electronic donor to complete later denitrification. Each time the sulfate radical oxidizes the ammonia nitrogen of 1kg, the COD of 1.71kg can be produced net. This means that the sulfate-type anaerobic ammonia oxidation process can provide excess carbon sources for subsequent denitrification units and help to solve the problem of inadequate carbon sources in the treatment of domestic sewage. Most areas in China and even the world are faced with the problem of eutrophication of lakes and reservoirs due to the lack of carbon sources. The study of this reaction is undoubtedly of great significance. To sum up, the effect of sulfate concentration on denitrification of An _ 2 / O process and the mechanism of denitrification of An _ 2 / O process with the participation of sulphate were studied in this study. It is confirmed that sulphate anammoxidation may also occur in domestic sewage. The results show that the suitable concentration of sulfate ion can improve the ability of removing total nitrogen in An 2 / O process, which lays a foundation for further development and utilization in the later stage.
【學(xué)位授予單位】：河南工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X703

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