杜创1，雷振2，张铁源3
（1.合肥市地下管网建设管理办公室，合肥，230031；2.赛莱默（中国）有限公司，上海，200051；3.赛莱默水处理（齐利诺普尔）有限公司，美国，16063）
摘要：合肥市某污水处理厂设计排放主要指标需达到地表水环境质量Ⅳ类标准。该项目深度单元处理采用Leopold elimi-NITE®反硝化深床滤池工艺，兼顾了过滤，反硝化脱氮及除磷功能，使污水厂出水稳定达到TN＜5mg/l，TP＜0.3mg/l，SS＜10mg/l。深床滤池设计采用弧形堰、恒液位控制及“前馈+后馈” 精确碳源投加控制方式，力求最经济的碳源投加量。
关键词：类Ⅳ类水；elimi-NITE®深床滤池；碳源投加控制
The Application of Deep Bed Filter in WWTP Upgrading to Meet Near Surface Water Class IV Standards
Chuang Du1, Lei Zhen2, Zhang Tieyuan3
(1.Hefei City Underground Pipe Network Construction Administration Office, Hefei, 230000; 2. Xylem (China) Co. Ltd, Shanghai, 200051; 3. Xylem Water Solutions Zelienople LLC, Zelienople, PA 16063)
Abstract: He Fei City Economic Development Zone WWTP Phase Ⅲ Project is designed to improve discharge qualities comply with Surface Water Environment Quality Class IV Standard (TN≤5mg/l). The Leopold elimi-NITE® denitrification deep-bed filter, which is a combination of filtration, denitrification and dephosphorization processes, has been applied as advanced treatment to ensure the effluent of SS<10mg/L, TN＜5mg/L and TP＜0.3mg/L. The deep bed filter design has considered curve weir, constant level control for better filter operation. In addition, an advanced Carbo dose control system with forward & backward was incorporated to achieve economical carbon usage.
Key words: Surface Water Class IV Standards, elimi-NITE® Deep-Bed Filter, Carbon Source Dosage Control
污水厂已建成污水处理规模20万m3/d（每期规模为10×104m3/d），现阶段执行一级A排放标准，近期将对一期、二期工程进行提标改造，将污水排放标准提高到主要指标达到地表水环境质量Ⅳ类标准。污水处理厂三期工程设计规模为10×104m3/d，出水设计值在达到《城镇污水处理厂污染物排放标准》（GB18918-2002）一级A标准的基础上，要求总磷、总氮、氨氮、化学需氧量4项主要指标浓度值分别不高于0.3、5、1.5、30mg/L，主要指标达到地表水环境质量Ⅳ类标准（总氮≤5mg/L）。
