Integrated Mathematical Model for Nutrient Removal Wastewater Treatment Plant Including Sludge Treatment Train

在对现有污水处理厂进行改造以处理营养物时，最具成本效益的解决方案之一是将其操作方式改为多级缺氧区分步进料工艺。本研究的目的是提出一种方法，以设置适当的操作条件的升级植物。对城市污水处理厂污泥处理系统回用水处理系统的有机物特性进行了现场研究。通过模拟分析，研究了缺氧段数对多级缺氧分段进水工艺脱氮效果的影响。为模拟污水处理厂由常规工艺改造为不扩大反应器容积的生产性工艺，建立了包括活性污泥模型No.2在内的数学模型，并进行了污水分步进水的多级缺氧-好氧工艺的实验室批式试验，验证了数学模型的正确性。模拟结果表明，存在最佳缺氧段数，控制好氧段溶解氧浓度可提高脱氮效果。

In upgrading the existing waste water treatment plants to treat nutrients, one of the most cost-effective solution is to change their operation style to multi-anoxic zone process with step feeding. The objective of this study is to present a method to set the appropriate operating conditions of upgraded plants. Field study was performed to characterize the organic matters in return flow from sludge treatment train to water treatment train in municipal wastewater treatment plants. Simulation analysis was performed to study the effect of number of anoxic zones on nitrogen removal of a multi-anoxic zone process with step feeding. The mathematical model that included the Activated Sludge Model No.2 was developed for simulating the performance of the full-scale wastewater treatment plant upgraded from conventional process to without enlargement of reactor volume.We performed the lab-scale batch experiments with the multi-anoxic-aerobic phases with sewage step feed to verify our mathematical model. Simulated results showed that there is the optimum number of anoxic zones and that controlling the dissolved oxygen concentration in aerobic zones improve the nitrogen removal performance.