生物稳定塘常规运行状态模拟与分析

利用在系统实验基础上建立的生态学模型对生物稳定塘的常规运行状态进行了模拟和计算,得到以下主要结论:多级塘各塘中的有机碳、无机氮及溶解性总磷浓度均随进水浓度的升高而增大,因而使用多级塘仍须严格控制进水水质;生物稳定塘系统有较高的去除有机氮的能力,但去除总氮的能力有限,出水中无机氮浓度仍较高;藻类含碳、氮、磷对进水浓度变化的响应规律一致,存在一个使藻类生长最佳的营养物浓度,本模拟中该浓度为进水C_(oi)=72.00mg/L,TN_i=23.80mg/L,TP_i=2.46mg/L,藻类浓度的提高有利于溶解性营养物质的去除;菌含碳、氮、磷对进水浓度变化的响应规律服从Monod方程。

Simulation and Analysis of Biological Stabilization Pond System

An ecological model was established by the authors to simulate the general operation characteristics of the biological stabilization pond system. It was concluded that the concentrations of organic carbon as well as nitrogen and phosphorus in each stage of a multi-stage pond increase with the increase of influent concentrations and therefore it is not proper to run a multi-stage pond at too high influent concentrations; the removal rate of the pond for organic nitrogen is rather high but not for total nitrogen for the pond system has a limited ability to remove inorganic nitrogen; the respon-dences of carbon, nitrogen and phosphorus contents in bacteria cells to the influent concentrations follow the Monod formula; the respondences of carbon, nitrogen and phosphorus content in algae cells are similar. There exists an optimum nutrient concentration for algae growth. In this study the concentration is:Coi=72Mg/L, TNi=23.80Mg/L, and TPi=2.46Mg/ L. The elevation of algae concentration is beneficial to the removal of dissolved nutrients.