Simulation of the operational conditions of the full-scale municipal wastewater treatment plant to improve the performance of nutrient removal

模拟全规模城市污水处理厂的运行工况，提高营养物去除性能

• 批准号: 07650632
• 负责人: TAKAKUWA Tetsuo
• 金额: $ 1.41万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650632/
• 关键词: Fractions of Organic Matters; IAWQ-Activated Sludge Model No.2; Nutrient Removal; Operating Condition; Upgraded Plant; 脱燐・脱窒; エアレーション

Simulation analysis based on a mathematical model is one of the powerful tools for determining the operational conditions for a full scale biological nutrient removal plant. The model that included the Activated Sludge Model No.2 was developed for simulating the performance of the plant in Sapporo City. The investigated plant has the biological reaction basin which consists of the four zones, anaerobic-aerobic-anoxic-aerobic phases with the step feed of the primary effluent to the anaerobic and anoxic zones. We performed three experiments to calibrate and verify our model : (i) Characterization of organic matters in the influent of the reaction basin with the OUR measurement method ; (ii) Measurement of COD and nutrient concentration at the plant ; (iii) Lab-scale batch experiments with the anaerobic-aerobic-anoxic-aerobic phases. The calibrating process of the model showed that no modification of parameter values was required to evaluate the performance of the plant and population of the activated sludge. Simulated results showed that the choice of the sewage step feed ratio did not affect the nitrogen removal and that the denitrification rate in the anoxic zone was controlled by the hydrolysis rate of the slowly biodegradable organic matters. The results of the lab-scale experiment and simulation results showed that the addition of the readily biodegradable organic matters like fermentation products of the primary settler sludge was effective to improve the performance of nitrogen removal.

基于数学模型的仿真分析是确定全尺度生物营养清除厂的操作条件的强大工具之一。包括活性污泥模型的模型是为了模拟萨波罗市工厂的性能而开发的。研究的植物具有生物反应盆地，该盆地由四个区域，厌氧 - 氧化 - 氧化氧化物相组成，其主要废水对厌氧和缺氧区域的逐步饲料。我们进行了三个实验以校准和验证我们的模型：（i）用我们的测量方法对反应盆地进水中有机物的表征； （ii）测量植物的鳕鱼和养分浓度； （iii）使用厌氧 - 氧化抗氧化型氧化型阶段进行的实验室规模批处理实验。该模型的校准过程表明，不需要对参数值的修改来评估植物的性能和活性污泥的种群。模拟结果表明，污水量进料比的选择不会影响去除氮的去除，并且缺氧区的反硝化速率受到缓慢可生物降解的有机物的水解速率的控制。实验室规模的实验和仿真结果的结果表明，添加易于生物降解的有机物（例如主要定居者污泥的发酵产物）有效地提高去除氮的性能。