本文選題：再生水回用 + 兩級曝氣生物濾池��； 參考：《華中科技大學》2013年碩士論文

【摘要】：熱電廠一直是工業(yè)用水的大戶，實現(xiàn)再生水回用是充分利用熱電廠水資源的有效途徑。襄陽熱電廠污水處理站目前采用DAT-IAT以及生物接觸氧化工藝，尾水不能達到《城鎮(zhèn)污水處理廠污染物排放標準》(GB18918—2002)一級B標準，尚不能直接回用，需要進行提標改造，使尾水達到再生水出水要求，而為了防止氨氮對銅管的腐蝕，回用水中氨氮濃度必須控制在1mg/L以下。本研究在襄陽熱電廠現(xiàn)場進行，選用兩級BAF和MBR進行動態(tài)小型對比試驗，為污水處理工藝的提標改造和再生水回用工程設計和運行提供技術(shù)支撐。 本試驗用襄陽熱電廠污水處理站的原水作為試驗裝置進水，分別比較了兩級BAF和MBR在啟動階段的運行狀況；比較了兩種工藝在穩(wěn)定運行階段，不同進水負荷條件下以及不同溶解氧濃度條件下，兩種工藝對COD、氨氮、TN、TP、SS去除效果。進行了兩種工藝基于污染物去除相關(guān)性的綜合出水水平分析。研究表明： 啟動階段，兩種工藝都采用人工接種污泥，然后進行悶曝。在進水同為0.5L/h條件下，兩種工藝對于COD、氨氮、TN以及SS都可以達到出水水質(zhì)要求，TP的去除沒有達標。 在穩(wěn)定運行階段，考察了進水負荷分別為0.5L/h、1.0L/h、1.5L/h的情況以及DO濃度從1.5~8mg/L之間變化時對于兩種工藝的影響研究。兩級曝氣生物濾池最優(yōu)運行條件為：進水負荷為1.0L/h，DO為2~5mg/L。膜生物反應器最優(yōu)運行條件為：進水負荷為0.5L/h，DO為3~5mg/L。 本文基于COD、TN、氨氮出水值的相關(guān)性，引入因子分析模型，對兩種工藝分別進行分析，得到3個指標相互影響所形成的綜合出水水平作為評判水質(zhì)優(yōu)劣標準。 綜合比較，兩級曝氣生物濾池相比較膜生物反應器啟動更為迅速，對于污染物的去除效果更好，也更為穩(wěn)定，因而在再生水回用工程中，兩級曝氣生物濾池優(yōu)于膜生物反應器。
[Abstract]:Thermal power plant has always been a major user of industrial water, and it is an effective way to make full use of water resources of thermal power plant to reuse reclaimed water. At present, the wastewater treatment station of Xiangyang Thermal Power Plant adopts DAT-IAT and biological contact oxidation process. The tailing water can not meet the first class B standard of pollutants discharge Standard of Municipal sewage treatment Plant (GB18918-2002) and cannot be directly reused, so it needs to be upgraded. In order to prevent the corrosion of copper pipe by ammonia nitrogen, the concentration of ammonia nitrogen in recycled water must be controlled below 1 mg / L. This study was carried out in Xiangyang Thermal Power Plant. Two stages BAF and MBR were selected to carry out dynamic small scale contrast test, which provided technical support for the improvement of wastewater treatment process and the design and operation of recycling project. Using raw water from wastewater treatment station of Xiangyang Thermal Power Plant as influent water, the two stages BAF and MBR were compared in start-up stage, and the two processes were compared in stable operation stage. Under different influent loading conditions and different dissolved oxygen concentrations, the removal effects of two processes on COD, TNN TPSS were studied. The comprehensive effluent level analysis of two processes based on the correlation of pollutant removal was carried out. The results showed that both processes were inoculated with sludge and then exposed. Under the same influent of 0.5L / h, the removal of TP from COD, NH3-N TN and SS could not meet the requirement of effluent water quality. In the stable operation stage, the influence of the influent load of 0.5 L / h, 1.0 L / h, 1.5 L / h and the variation of do concentration from 1.5 mg / L to 8 mg / L on the two processes were investigated. The optimal operating conditions of two-stage biological aerated filter are as follows: the influent load is 1.0 L / h, do is 2 mg / L. The optimal operating conditions of the membrane bioreactor are as follows: the influent load is 0.5 L / h and the do is 3 mg / L. In this paper, based on the correlation of effluent value of CODN and NH3-N, factor analysis model was introduced to analyze the two processes, and the comprehensive effluent level formed by the interaction of three indexes was obtained as the criterion to judge the quality of the effluent. Compared with membrane bioreactor, two-stage biological aerated biofilter is more efficient and stable than membrane bioreactor, so it is better than membrane bioreactor in reclaimed water reuse project.
【學位授予單位】：華中科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU991.4

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本文編號：2044634