本文選題：寒冷地區(qū) + 前置反硝化�。� 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：近年來隨水處理標(biāo)準(zhǔn)的提高,A~2O工藝在污水處理廠的應(yīng)用中由于具有運(yùn)行穩(wěn)定,對(duì)自控水平的要求較低,便于管理維護(hù)的特點(diǎn),相比其他自控水平要求高或控制管理復(fù)雜的污水處理工藝具有明顯的優(yōu)勢(shì),逐漸成為目前寒冷地區(qū)應(yīng)用最多的污水處理工藝。針對(duì)傳統(tǒng)A~2O工藝中存在的影響脫氮除磷效果的矛盾,致使A~2O工藝難以同步獲得較好的脫氮除磷效果,在使用中受到限制,因此本課題針對(duì)目前最常用的A~2O脫氮除磷工藝設(shè)計(jì)優(yōu)化問題,設(shè)計(jì)了一種“多點(diǎn)進(jìn)水,混合液多點(diǎn)回流”的改良A~2O工藝。該工藝流程簡(jiǎn)單、運(yùn)行管理方便靈活,具有分點(diǎn)進(jìn)水和多點(diǎn)回流特性,提高了脫氮除磷處理效率。在課題研究中,通過小試,驗(yàn)證了該工藝與傳統(tǒng)A~2O工藝對(duì)污水處理的效率,通過小試,認(rèn)為該種工藝?yán)碚摽尚?具備工程實(shí)施的可行性,處理效率比傳統(tǒng)工藝有較大提高,在相同的運(yùn)行條件下,由于改良型A~2O工藝能在好氧區(qū)積累更多的硝化菌,提高了處理效率,改良型A~2O系統(tǒng)對(duì)氨氮的去除效果明顯好于A~2O系統(tǒng);由于改良型A~2/O工藝能在缺氧區(qū)為反硝化菌的生長(zhǎng)繁殖提供更好的條件,由此提高了反硝化效率;改良型A~2O系統(tǒng)對(duì)總氮的去除效果明顯好于A~2O系統(tǒng)。在小試的基礎(chǔ)上,通過該工藝在東北寒冷地區(qū)某污水處理廠(規(guī)模5萬噸/日)的工程實(shí)踐證明:該工藝處理效果良好,抗低溫沖擊能力強(qiáng):TP平均去除率為89.63%;出水氨氮常年＜5mg/L,且小于1mg/L比例為83.3%;總氮平均去除率為62.67%,出水平均值為12.76mg/L,最大值16.07mg/L,小于15mg/L的比例為90%。工程處理成本在污水處理行業(yè)中位于先進(jìn)行列,污水處理廠投產(chǎn)以來,噸水運(yùn)行成本＜0.35元;噸水電耗＜0.3kwh。改良A~2O工藝的改進(jìn)和優(yōu)化,為寒冷地區(qū)污水處理廠的建設(shè)提供了較好的工藝路線。
[Abstract]:In recent years, with the improvement of water treatment standard, the application of A2O process in wastewater treatment plant has the characteristics of stable operation, low requirement of automatic control level, and convenient management and maintenance. Compared with other sewage treatment processes with high level of automatic control or complicated control and management, it has become the most widely used wastewater treatment process in cold regions. In view of the contradiction existing in the traditional Ani2O process, which affects the effect of nitrogen and phosphorus removal, it is difficult to obtain better denitrification and phosphorus removal effect simultaneously, which is limited in use. Therefore, aiming at the most commonly used process design optimization of nitrogen and phosphorus removal, a modified Ani2O process of "multi-point influent, multi-point reflux of mixed solution" was designed in this paper. The process flow is simple, the operation management is convenient and flexible, and it has the characteristics of split point influent and multi-point reflux, and improves the efficiency of denitrification and phosphorus removal. In the course of the research, the efficiency of this process and the traditional Ani2O process for wastewater treatment is verified by small scale test. Through the small scale test, it is considered that this process is feasible in theory, feasible in engineering implementation, and the treatment efficiency is much higher than that of the traditional process. Under the same operating conditions, the improved Ani2O process can accumulate more nitrifying bacteria in the aerobic zone and improve the treatment efficiency. The improved Ani2O system has a better removal effect of ammonia nitrogen than that of the Agno _ 2O system. The improved An _ 2 / O process can provide better conditions for denitrifying bacteria growth and reproduction in anoxic zone, thus increasing denitrification efficiency, and the improved An _ 2O system has a better removal effect of total nitrogen than that of A _ (2) O _ (2) O system. On the basis of the small trial, the engineering practice of this process in a sewage treatment plant in the cold area of Northeast China (with a scale of 50,000 tons / day) proves that the process has a good treatment effect. The average removal rate of strong low temperature impact resistance is 89.63%, ammonia nitrogen in effluent is less than 5 mg / L and less than 83.3% of 1mg/L, the average removal rate of total nitrogen is 62.67 mg / L, the average value of effluent is 12.76 mg / L, the maximum value is 16.07 mg / L, and the proportion less than 15mg/L is 90 beats. The cost of engineering treatment is one of the most advanced in sewage treatment industry. Since the sewage treatment plant was put into operation, the operating cost of tons of water is less than 0.35 yuan, and the consumption of water and electricity per ton is less than 0.3 kwh. The improvement and optimization of the improved Ani2O process provide a better technological route for the construction of wastewater treatment plants in cold areas.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703.1

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