污水生物脱氮除磷在DE氧化沟工艺中的矛盾关系及对策

Contradictory relationship and countermeasures of biological nitrogen and phosphorus removal in wastewater in DE oxidation ditch process

随着工业的发展,水资源日益紧缺,水环境保护逐步得到各国政府和社会的密切关注,污水处理产业得到了飞速发展,同时也提出了更高的要求,特别是对出水的氮、磷含量要求越来越严格。在对城市污水进行处理时,其生物除磷与脱氮工艺在同时进行时不可避免就会出现矛盾与竞争,如不能对其进行有效处理,将会直接影响到受纳水体的水质,当水中的氮和磷的含量超过了水体的容量,会导致藻类过量生长,形成水体富营养化的现象,造成水体质量恶化和水生环境结构破坏。在本研究中,笔者就结合自身的工作经验,以惠安县城污水处理厂为背景对其污水处理工作中脱氮除磷中的矛盾关系进行了系统的分析,并针对性地提出了应对措施。

With the development of industry, water resources are becoming increasingly scarce. Water environment protection has been closely watched by governments and society. The sewage treatment industry has developed rapidly, and higher requirements have been put forward, especially for nitrogen in effluent. Phosphorus requirements are becoming more stringent. When the urban sewage is treated, its biological phosphorus removal and denitrification process will inevitably lead to contradictions and competitions. If it cannot be effectively treated, it will directly affect the water quality of the receiving water. The nitrogen and phosphorus content exceeds the capacity of the water body, which leads to excessive growth of algae and formation of eutrophication of the water body, resulting in deterioration of water quality and structural damage of the aquatic environment. In this study, the author combined with his own work experience, based on the Hui’an County sewage treatment plant as a background to systematically analyze the contradiction between nitrogen and phosphorus removal in sewage treatment work, and proposed countermeasures.