再生水廠CAST工藝脫氮性能優(yōu)化研究

                    高永青¹，蘇雪瑩¹，王佳偉¹，程秋音²，馬文³，張樹軍¹，

阜崴⁴，馬淑勍⁵

（1. 北京城市排水集團有限責任公司科技研發(fā)中心，北京 100044；2. 北京北排水環(huán)境發(fā)展有限公司 壩河流域分公司，北京 100012；3. 北京北排水環(huán)境發(fā)展有限公司 吳家村再生水廠，北京 100071；4.北京北排水環(huán)境發(fā)展有限公司水質檢測中心，北京 100022； 5. 北京北排水環(huán)境發(fā)展有限公司 盧溝橋再生水廠，北京 100071）

摘要：本文結合某再生水廠循環(huán)式活性污泥法（CAST）的運行現(xiàn)狀，分析了該工藝選擇區(qū)的脫氮潛能。通過調節(jié)曝氣支管氣量，探討擴大缺氧區(qū)對CAST工藝脫氮性能的影響。結果發(fā)現(xiàn)，擴大缺氧區(qū)有利于充分利用進水中的COD進行反硝化，出水TN穩(wěn)定低于15mg/L。通過工藝優(yōu)化，可以強化CAST工藝脫氮性能，節(jié)省曝氣能耗并減少碳源投加量。

關鍵詞：CAST；缺氧區(qū)；脫氮；曝氣

中圖分類號：X703   文獻標識碼：A

Research On Optimization of Nitrogen Removal Performance of CAST Process in Water Reclamation Plant

GAO Yong-qing¹, SU Xue-ying¹, WANG Jia-wei¹, CHENG Qiu-yin², Ma Wen³ ,

ZHANG Shu-jun¹, FU Wei⁴,  MA Shu-qing⁵

（1. Beijing Drainage Group Technology Research and Development Center, Beijing 100044, China; 2. Bahe River Basin Branch Company, Beijing Drainage Water Environment Development Co., Ltd., Beijing 100012,China; 3. Wujiacun Recycled Waterworks, Beijing Drainage Water Environment Development Co., Ltd., Beijing 100071,China;4.Water Quality Testing Center, Beijing Drainage Water Environment Development Co., Ltd., Beijing 100022,China;5. Lugouqiao Recycled Waterworks, Beijing Drainage Water Environment Development Co., Ltd., Beijing 100071,China )

Abstract: The nitrogen removal potential of selector was analyzed by combining the running status of Cyclic Activated Sludge Technology (CAST). The effect of expanding anoxic zone on nitrogen removal performance was discussed by adjusting aeration. The results showed that expansion of anoxic zone was beneficial to make use of influent COD to denitrify, and effluent TN was stable below 15mg/L. Process optimization can enhance nitrogen removal performance of CAST, save aeration energy consumption and reduce dosage of carbon source. 

Keywords: CAST; anoxic zone; nitrogen removal; aeration