摘要
应用TUD模型对北京某大型市政污水处理厂的升级改造方案———改良A2/O工艺进行了模拟评价,结果显示:出水TP接近排放标准限值,存在超标排放风险;设置预缺氧池并不能促进生物除磷,反而会消耗进水中有限的VFAs;只要水解酸化作用能保持进水总COD中的VFAs含量>10%,即可获得较好的生物除磷效果;设置脱氧池对生物脱氮的促进作用十分有限。在模拟评价基础上,提出了将初沉池全部改造为厌氧池并施以侧流化学除磷的A2/O优化设计方案。对优化工艺方案的模拟预测显示,出水水质良好而稳定。
The TUD model was applied to evaluate and optimize a modified A^2/O process design which is an upgrading and reconstruction scheme of a large municipal WWTP in Beijing. The model-based prediction shows that the effluent TP is at the borderline of discharge standards, and the over- standard discharge risk exists. Setting a pre-anoxic tank does not promote biological phosphorus removal, instead, it consumes the limited VFAs in the influent. As long as the hydrolysis-acidification can main- tain the VFAs content in the influent total COD above 10% , the effective biological phosphorus removal can be reached. Setting deoxidizing tank has a very limited promotion of biological nitrogen removal. Based on the model-based evaluation, an optimized A^2/O process design scheme of reconstructing the primary settler to the anaerobic tank and applying the side-stream chemical phosphorus removal mode is proposed. Simulations of the optimized process design scheme indicate that a good and stable effluent can be realized.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第17期14-19,共6页
China Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2006AA06Z320)
北京市"可持续水与废物循环利用技术"学术创新团队项目(BJE10016200611)
关键词
污水处理厂
升级改造
数学模拟
脱氮除磷
A2/O工艺
水解酸化
侧流除磷
wastewater treatment plant
upgrading and reconstruction
mathematical simulation
nitrogen and phosphorus removal
A2/O process
hydrolysis-acidification
side-stream phosphorus removal
