本文選題：亞硝化 + 厭氧氨氧化　； 參考：《蘇州科技大學(xué)》2017年碩士論文

【摘要】：本文針對高氨氮廢水的處理,啟動了中試PN-ANAMMOX一體化實驗裝置。本文首先從亞硝化的啟動著手,研究了亞硝化啟動過程中的控制策略以及能力提升過程中的參數(shù)控制。然后通過降低進水氨氮負荷以及同步降低曝氣量等方式實現(xiàn)了符合ANAMMOX工藝進水配比的亞硝化反應(yīng)器的調(diào)控。最后將PN-ANAMMOX聯(lián)合在一起,實現(xiàn)聯(lián)合工藝的穩(wěn)定運行及其脫氮能力的提升,并借助于qPCR分析了各區(qū)域功能菌的變化。本研究旨在為高氨廢水的高效低耗脫氮提供新思路和理論指導(dǎo)。主要研究結(jié)果如下:(1)中試連續(xù)流亞硝化反應(yīng)器在中溫(19~27℃)的條件下,通過對不同運行階段的溶解氧進行調(diào)控(前期DO=6.0±1.0mg·L-1、后期DO=0.6±0.1mg·L-1),以及根據(jù)亞硝酸鹽產(chǎn)生速率的提升合適的提高進水氨氮負荷和對曝氣量的合理調(diào)控是中試連續(xù)流亞硝化反應(yīng)器成功啟動的關(guān)鍵。經(jīng)過110天的運行,反應(yīng)器的NPR達到了1.2 kg N m-3·d-1。(2)通過高FA、高FNA以及低DO的聯(lián)合抑制可以有效的啟動亞硝化過程,本實驗在啟動過程中控制了FA濃度在5.0~20mg·L-1、FNA濃度在0.025~0.033 mg/L及DO濃度在0.6±0.1mg·L-1之間,實現(xiàn)AOB的富集、NOB的淘汰、中試連續(xù)流亞硝化反應(yīng)器的成功啟動,亞硝化成功啟動后出水硝氮濃度穩(wěn)定在8 mg·L-1,NAR穩(wěn)定在0.98以上。(3)通過110天的運行,中試連續(xù)流亞硝化反應(yīng)器中功能微生物AOB的占比逐漸提高,從啟動初期的5.3×109到成功啟動后AOB的拷貝數(shù)達到了1.6×1011,NOB的拷貝數(shù)反而從1.1×1010下降到1.2×109,AOB拷貝數(shù)的數(shù)量級比NOB的要高2個數(shù)量級,這也是反應(yīng)器內(nèi)部硝氮濃度較低以及高NAR的原因所在。(4)中試連續(xù)流亞硝化反應(yīng)器在中溫(31~35℃)的條件下,通過降低進水氨氮負荷,降低供氣量以及將反應(yīng)器內(nèi)部多余的亞硝化污泥排除系統(tǒng),成功的實現(xiàn)了匹配ANAMMOX工藝進水的亞硝化反應(yīng)的調(diào)控。匹配成功后ANAMMOX工藝進水水質(zhì)配比亞氮:氨氮=(1.0-1.5):1。(5)通過高FA、適宜的溫度以及低DO的聯(lián)合抑制可以有效的抑制NOB的活性。本實驗在調(diào)控匹配ANAMMOX工藝進水的亞硝化過程中控制了FA濃度在2~8mg·L-1、溫度在31℃~35℃及DO濃度在0.5~1mg·L-1之間,可有效的抑制NOB的活性,NAR穩(wěn)定在0.92以上。(6)在聯(lián)合工藝脫氮能力提升的過程中,通過提高進水氨氮濃度和提高進水流量兩種方式提高進水氮負荷,經(jīng)過71天的運行,反應(yīng)器脫氮速率達到0.431kg N m-3·d-1。(7)采取可實時監(jiān)測聯(lián)合工藝運行參數(shù)的WTW監(jiān)測儀器對反應(yīng)器運行狀況進行監(jiān)測,可及時獲取相關(guān)數(shù)據(jù),并對當(dāng)前的運行狀況可作出及時調(diào)整,可減少反應(yīng)器在運行過程中處于非正常運行狀態(tài)的時間,對反應(yīng)器脫氮能力的提升起到了非常大的作用。(8)根據(jù)反應(yīng)器出現(xiàn)問題應(yīng)及時的采取相應(yīng)措施進行恢復(fù),盡量減少反應(yīng)器處于不正常狀態(tài)下的時間,同時實現(xiàn)對反應(yīng)器內(nèi)部的數(shù)據(jù)也應(yīng)進行及時的監(jiān)測,只有了解了反應(yīng)器內(nèi)部的情況后才能對參數(shù)上得出的相關(guān)經(jīng)驗結(jié)論進行驗證,并進行調(diào)整。
[Abstract]:Aiming at the treatment of high ammonia nitrogen waste water, a pilot PN-ANAMMOX integrated experimental device was started. Firstly, starting from the start of nitrification, the control strategy and the parameter control during the process of nitrosation start were studied, and then the characters were realized by reducing the load of inflow ammonia nitrogen and reducing the aeration synchronously. The ANAMMOX process is controlled by the nitrosation reactor of the influent ratio. Finally, the PN-ANAMMOX is combined to achieve the stable operation of the combined process and the lifting of the nitrogen removal capacity, and the changes in the functional bacteria in various regions are analyzed with the help of qPCR. The aim of this study is to provide new ideas and theoretical guidance for the high efficiency and low consumption of nitrogen in the high ammonia wastewater. The results are as follows: (1) under the condition of medium temperature (19~27 C), the pilot continuous flow nitrosation reactor regulates the dissolved oxygen at different stages (pre DO=6.0 1.0mg / L-1, DO=0.6 + 0.1mg L-1), as well as the improvement of the influent ammonia nitrogen load and the reasonable regulation of aeration according to the enhancement of nitrite production rate. After 110 days' operation, the NPR of the reactor reached 1.2 kg N m-3. D-1. (2) through high FA, high FNA and low DO, which could effectively start the nitrosation process. The concentration is between 0.6 + 0.1mg and L-1, which realizes the enrichment of AOB, the elimination of NOB, the successful start of the continuous flow nitrosation reactor, the nitrite nitrogen concentration is stable at 8 mg. L-1, and the NAR is stable over 0.98. (3) the ratio of functional microorganisms AOB to the continuous flow nitrosation reactor is gradually increased through the operation of 110 days. The number of copies of AOB reached 1.6 * 1011 from the initial start of the initial start, and the copy number of NOB dropped from 1.1 x 1010 to 1.2 * 109, and the number of AOB copies was 2 orders of magnitude higher than that of NOB. This was also the cause of the low nitrate concentration and high NAR in the reactor. (4) the continuous flow nitrosation reactor in the medium temperature (3) (4) was in the middle temperature (4). Under the condition of 1~35 C), by reducing the load of ammonia nitrogen, reducing the amount of gas supply and removing the excess nitrification sludge removal system inside the reactor, the subnitrification reaction was successfully realized by matching the influent of the ANAMMOX process. After the match, the water quality of the ANAMMOX process was proportional to nitrogen: ammonia nitrogen = (1.0-1.5): 1. (5) passed the high FA, suitable temperature. The combined inhibition of degree and low DO can effectively inhibit the activity of NOB. In this experiment, the concentration of FA was controlled in 2~8mg. L-1 during the process of regulating the influent nitrosation of the matched ANAMMOX process. The temperature was between 0.5~1mg and DO at 31 degrees C and DO concentration. The NOB activity was effectively suppressed, and NAR stabilized at 0.92. (6) the ability to remove nitrogen from the combined process. In the process of rising, the influent nitrogen load is increased by increasing the influent ammonia nitrogen concentration and increasing the influent flow rate. After 71 days of operation, the nitrogen removal rate of the reactor reaches 0.431kg N m-3. D-1. (7). The WTW monitoring instrument which can monitor the operating parameters of the joint process can monitor the operating condition of the reactor, and the relevant data can be obtained in time. And the current operation condition can be adjusted in time, which can reduce the time of the reactor in the abnormal running state and improve the nitrogen removal capacity of the reactor. (8) according to the problem of the reactor, the corresponding measures should be taken in time to recover and minimize the unnormal state of the reactor. At the same time, the data within the reactor should be monitored in time. Only after understanding the internal situation of the reactor can the relevant empirical conclusions from the parameters be verified and adjust.
【學(xué)位授予單位】：蘇州科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X703

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