Recently, the quickly growing population living in urban location has caused numerous conflicts related to increase in water demand and water pollution. In urban areas, the surface water bodies allow runoffs and storms and in addition act as wastewater drainage pathways. Mostly, the imperfect separation of rainwater and clean wastewater has made large quantities of wastewater discharged into the surface water, resulting in serious pollution. There are many treatment methods for the polluted water bodies such as coagulation, filtration, and ecological floating bed which are related to nutrient removal. The above listed methods are usually capable in reducing pollution load. Wastewaters generated from two sources such as point source (domestic and industries) and non-point source (agricultural and storm water runoff). Finally it reaches nearby water bodies and the abovementioned methods are to be frequently employed in a wastewater treatment plant to remove nutrients. Most of the pollutants in the vastly polluted water are in dissolved forms; hence, an appropriate treatment method relevant to the design and development of the integrated multistage reactor with extended wastewater treatment is reviewed in this paper. Evaluating the accumulation, precipitation, retention, and removal of phosphorus, along with removal of nitrogen, is discussed in brief.

最近，居住在城市中的人口迅速增长，引起了许多与用水需求增加和水污染有关的冲突。在城市地区，地表水体允许径流和暴雨，此外还充当废水排放的通道。通常，雨水和清洁废水的不完全分离导致大量废水排入地表水中，造成了严重的污染。污染水体的处理方法有很多，例如凝结，过滤和生态浮床，这些方法都与营养去除有关。上面列出的方法通常能够减少污染负荷。废水来自两种来源，例如点源（家庭和工业）和非点源（农业和雨水径流）。最终它到达附近的水体，并且上述方法通常用于废水处理厂中以去除营养。污染严重的水中的大多数污染物都是溶解形式的。因此，本文综述了一种与污水处理一体化多级反应器的设计和开发有关的适当处理方法。简要讨论了评估磷的积累，沉淀，保留和去除以及氮的去除。本文综述了与设计和开发具有扩展废水处理能力的集成多级反应器有关的适当处理方法。简要讨论了评估磷的积累，沉淀，保留和去除以及氮的去除。本文综述了与设计和开发集成多级反应器并进行扩展废水处理有关的适当处理方法。简要讨论了评估磷的积累，沉淀，保留和去除以及氮的去除。