摘要
某城市污水处理厂以曝气生物滤池(BAF)为主要处理工艺,现面临升级改造。设计处理水量2m3/d的中试装置,分别进行前置反硝化和以甲醇为碳源的后置反硝化试验研究,并优化各处理单元的运行参数。其中前置反硝化工艺回流比为125%,单池水力停留时间为20min,CN池和N池的气水比分别为4∶1和3∶1,后置反硝化工艺的水力停留时间为45min,CN池和N池的气水比分别为6∶1和5∶1,甲醇投加量为30mg/L。通过核算建设成本与运行费用,推荐了以前置反硝化为核心的升级改造方案。
Some municipal wastewater treatment plant using biological aerated filter（BAF） as its main process for upgrading.The pre-denitrification and post-denitrification experiment studies were carried out by a pilot equipment with 2 m3/d designed capacity,and the parameters of each process unit in the studies were optimized.For pre-denitrification,the reflux ratio was 125%,the hydraulic retention time was 20 min,the CN filter and N filter gas-water ratio were 4：1 and 3：1 respectively.For post-denitrification,the hydraulic retention time was 45 min,the CN filter and N filter gas-water ratio were 6：1 and 5：1 respectively,and the methane dosage was 30 mg/L.Based on construction and operation cost analysis,the pre-denitrification upgrading plan was proposed.
出处
《给水排水》
CSCD
北大核心
2011年第8期47-52,共6页
Water & Wastewater Engineering
基金
国家水体污染控制与治理科技重大专项(2008ZX07208003、2008ZX07420004BJUT001、2008ZX07208005、2009ZX07424001)
城市水资源与水环境国家重点实验室开放基金(QAK201005)
国家自然科学基金(50878003)
北京市自然科学基金(8092006)
关键词
污水处理厂
曝气生物滤池
升级改造
前置反硝化
后置反硝化
运行成本
Wastewater treatment plant
Biological aerated filter
Upgrading and reconstruction
Pre-denitrification
Post-denitrification
Operation cost
