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

在对现有污水处理厂进行营养物处理的改造中，将其操作方式改为多缺氧区分步进料是最经济有效的解决方案之一。本研究的目的是提出一种方法来设定适当的升级装置的操作条件。对城市污水处理厂污泥处理列车至水处理列车返流中有机物的特征进行了实地研究。通过模拟分析，研究了多级进料厌氧区数对多厌氧区脱氮的影响。建立了包含活性污泥2号模型的数学模型，用于模拟从常规工艺升级到不扩大反应器体积的全规模污水处理厂的性能。为了验证我们的数学模型，我们进行了实验室规模的分批实验，采用多级厌氧-好氧相和污水阶梯进料。模拟结果表明，存在最佳缺氧区数，控制好氧区溶解氧浓度可提高脱氮性能。

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.