本文選題：短程硝化反硝化除磷　切入點(diǎn)：低碳城市污水　出處：《廣州大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：“水體富營(yíng)養(yǎng)化”問(wèn)題的日益尖銳促使了傳統(tǒng)脫氮除磷工藝的研究與應(yīng)用發(fā)展,但傳統(tǒng)脫氮除磷工藝的缺陷也逐漸暴露,同時(shí)面臨著水行業(yè)對(duì)污水處理方面提出的低碳可持續(xù)發(fā)展的要求,傳統(tǒng)脫氮除磷工藝已不能滿足污水處理發(fā)展的需求。本課題所研究的短程硝化反硝化除磷技術(shù)(短程SNDPR)能將亞硝化和反硝化除磷過(guò)程在同一空間和時(shí)間發(fā)生,可解決傳統(tǒng)脫氮除磷工藝中碳源爭(zhēng)奪、污泥齡、能耗高等問(wèn)題,實(shí)現(xiàn)“一碳兩用”,適合于碳源偏低的城市污水處理。試驗(yàn)針對(duì)以人工模擬的碳源偏低城市污水為處理對(duì)象,分步培養(yǎng)亞硝化菌和以亞硝化菌為電子受體的反硝化除磷菌,然后混合于同一系統(tǒng),進(jìn)行亞硝化菌和反硝化除磷菌共存的馴化培養(yǎng)。在培養(yǎng)馴化成熟的系統(tǒng)內(nèi),研究了進(jìn)水碳源濃度和總磷濃度對(duì)厭氧段PHB積累的影響,并在此基礎(chǔ)上,提出前置曝氣方式促進(jìn)PHB最大積累,來(lái)解決外碳源最大化積累為碳源驅(qū)動(dòng)力PHB的問(wèn)題。在后續(xù)低氧段,通過(guò)考察不同供氣模式(連續(xù)曝氣和間歇曝氣)下,短程SNDPR過(guò)程中TP、TN、NH4+、NO2-、NO3-和PHB的變化規(guī)律,來(lái)解析最大化積累的PHB驅(qū)動(dòng)亞硝化和短程反硝化除磷過(guò)程速率平衡的有效操控條件。試驗(yàn)結(jié)果表明:分步馴化優(yōu)勢(shì)菌種而后混合共存培養(yǎng)的方式,能有效實(shí)現(xiàn)同時(shí)亞硝化和反硝化除磷過(guò)程,成熟系統(tǒng)內(nèi)TN去除率為83.1%,TP去除率為90.2%。進(jìn)水碳源和總磷濃度與PHB的最大積累量呈正相關(guān),且碳源濃度對(duì)PHB積累量的影響比總磷濃度的影響大。比較無(wú)前曝氣時(shí)厭氧PHB最大積累量,增設(shè)前曝氣運(yùn)行方式可促進(jìn)PHB最大化積累。連續(xù)曝氣模式下,氣量為30L/h有利于短程SNDPR的穩(wěn)定持續(xù)發(fā)生,其TN去除率為93.7%,TP去除率為96.4%;間歇曝氣模式下,低AF值和低fIA值能為系統(tǒng)提供利于短程SNDPR發(fā)生的微氧環(huán)境,并均化氧化還原反應(yīng),PHB降解速率更為平穩(wěn),恒定氣量為40L/h時(shí),AF值為0.5與fIA值為24工況下短程SNDPR穩(wěn)定性和效果最佳,TN去除率為91.1%,TP去除率為92.9%。綜合厭氧和低氧階段脫氮除磷效果和PHB變化規(guī)律,可知以PHB為碳源驅(qū)動(dòng)的同時(shí)亞硝化和反硝化除磷過(guò)程中,利用前曝氣運(yùn)行方式最大化PHB厭氧階段的積累量,并使其在低氧階段得到均衡有效降解,可為平衡亞硝化與反硝化除磷速率創(chuàng)造有利條件。
[Abstract]:"Eutrophication" problem increasingly sharp prompted the development and application of traditional nitrogen and phosphorus removal, but the defects of the traditional nitrogen and phosphorus removal are gradually exposed, while facing the water requirements of sewage treatment industry low carbon sustainable development is put forward, the traditional nitrogen and phosphorus removal process has been unable to meet the development of sewage treatment the demand. Nitrification and denitrifying phosphorus removal technology research (short SNDPR) can separate nitrification and denitrifying phosphorus removal process at the same time and space, can solve the traditional nitrogen and phosphorus removal process for carbon source, sludge age, high energy consumption, to achieve a "carbon dual-use" for the city sewage treatment to the low carbon source. According to the test of artificial simulation of low carbon city wastewater as treatment object, step by step training nitrosobacteria and nitrosobacteria as electron acceptor for denitrifying phosphorus removal bacteria and mixed. In the same system, sub nitrifying bacteria and denitrifying phosphorus removal bacteria coexisted during acclimation acclimation. The mature system, the effects of carbon source concentration and total phosphorus concentration in influent of anaerobic PHB accumulation, and on this basis, put forward to promote aeration PHB maximum accumulation, to solve the external carbon source the maximum accumulation as the carbon source driving force of PHB. In the follow-up period of hypoxia through the study of different supply modes, (continuous aeration and intermittent aeration), short in the process of SNDPR TP, TN, NH4+, NO2-, changes of NO3- and PHB, to analyze the maximum accumulation of PHB driving conditions can effectively control the balance rate of Asia nitrification and denitrifying phosphorus removal process. The experimental results show that the dominant bacteria and domestication step mix culture method can effectively realize at the same time nitrification and denitrifying phosphorus removal process, mature system in the removal rate of TN is 83.1%, the removal rate of TP As the largest accumulation of 90.2%. carbon source and concentration of total phosphorus and PHB were positively correlated, and the influence of carbon source concentration on PHB accumulation than the effect of TP concentration. There is no pre aeration anaerobic PHB maximum accumulation, before adding aeration mode can promote PHB accumulation. The maximum continuous aeration mode, gas 30L/h is conducive to the stability of the short-range SNDPR persists, the removal rate of TN is 93.7%, the removal rate of TP was 96.4%; intermittent aeration mode, low AF value and low fIA value can provide for the micro aerobic environment short-range SNDPR occurred as a system, and all of the redox reaction, PHB degradation rate is more stable, constant the gas is 40L/h, AF value 0.5 and fIA value of short-range SNDPR stability and effect of the 24 conditions, the removal rate of TN was 91.1%, the removal rate of TP is 92.9%. comprehensive and anaerobic hypoxia stage of nitrogen and phosphorus removal and PHB variation, that using PHB as carbon source driving the same During the process of time nitrification and denitrifying phosphorus removal, the accumulation of PHB anaerobic stage can be maximized by using the pre aeration operation mode, and it can be evenly and effectively degraded in the low oxygen stage, which can create favorable conditions for the balanced nitrification and denitrifying phosphorus removal rate.

【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703

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