再生水厂 CAST 工艺脱氮性能优化研究 苏雪莹 1，高永青 1，程秋音 2，曹婧 2，马文 2，阜崴 1，张树军 1，马淑勍 1， 孙丽欣 1 （1. 北京城市排水集团有限责任公司科技研发中心，北京 100044；2. 北京北排水环境发展 有限公司 吴家村再生水厂，北京 100071） 摘要：本文结合某再生水厂循环式活性污泥法（CAST）的运行现状，分析了该工艺选择区的脱氮潜能。 通过调节曝气支管气量，探讨扩大缺氧区对 CAST 工艺脱氮性能的影响。结果发现，扩大缺氧区有利于充 分利用进水中的 COD 进行反硝化，出水 TN 稳定低于 15mg/L。通过工艺优化，可以强化 CAST 工艺脱氮 性能，节省曝气能耗并减少碳源投加量。 关键词：CAST；缺氧区；脱氮；曝气 中图分类号：X703 文献标识码：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
