城市污水脱氮除磷工艺
[摘要]城市污水中含有大量的氮、磷元素，此类污水若未经净化处理便随意排放，将会加速城市水源环境的恶化，从而出现水体富营养化等严重后果。因此，当前形势下深入作好污水脱氮除磷工艺研究，保证城市水源环境始终处于良好循环状态，客观而必要。本文阐述了废水脱氮除磷的生物方法与物理化学方法原理及处理工艺概况。
[关键词] 城市污水；脱氮除磷；工艺
Development of nitrogen and phosphorus removal process for urban sewage
Abstract：Urban sewage contains a large amount of nitrogen and phosphorus. If such sewage is discharged without purification, it will accelerate the deterioration of the urban water source environment, resulting in serious consequences such as eutrophication of water. Therefore, under the current situation, the research on the process of nitrogen and phosphorus removal in wastewater is in-depth, ensuring that the urban water source environment is always in a good circulation state, objective and necessary. This paper describes the biological and physicochemical methods of wastewater denitrification and phosphorus removal and the treatment process.
Keywords: urban sewage；nitrogen and phosphorus removal；process
现实中，水体中的氮磷元素多源于日常生活污染、农业、工业生产污染层面。大量氮磷元素进入水体，导致水体自净能力难以有效完成，从而破坏了城市水域的生态环境。因此，污水排入城市水域前，必须严格清除污水中所含的氮磷元素，以促使城市水环境保持同时，回收氮磷元素，最终达到循环利用的目的。
1.城市污水除磷方法
1.1生物法
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