再生水廠 CAST 工藝脫氮性能優(yōu)化研究 蘇雪瑩 1，高永青 1，程秋音 2，曹婧 2，馬文 2，阜崴 1，張樹軍 1，馬淑勍 1， 孫麗欣 1 （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 吳家村再生水廠，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，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 , CHENG Qiu-yin2 , CAO Jing2 , Ma Wen2 ,FU Wei1 , ZHANG Shu-jun1 , MA Shu-qing1 （1. Beijing Drainage Group Technology Research and Development Center, Beijing 100044, China; 2. Wujiacun Recycled Waterworks, Beijing Drainage Environment Development Company, 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