NITRATE REMOVAL IN WOODCHIP DENITRIFICATION BIOREACTOR – AN APPROACH COMBINING MATHEMATICAL MODELLING AND PI CONTROL

IF 1 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Journal of Environmental Engineering and Landscape Management Pub Date : 2022-01-10 DOI:10.3846/jeelm.2022.15295

Anatolij Nečiporenko, F. Ivanauskas, J. Dabulytė-Bagdonavičienė, A. Povilaitis, V. Laurinavicius

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引用次数: 0

Abstract

A mathematical model of nitrate removal in woodchip denitrification bioreactor based on field experiment measurements was developed in this study. The approach of solving inverse problem for nonlinear system of differential convection-reaction equations was applied to optimize the efficiency of nitrate removal depending on bioreactor’s length and flow rate. The approach was realized through the developed algorithm containing a nonlocal condition with an incorporated PI controller. This allowed to adjust flow rate for varying inflow nitrate concentrations by using PI controller. The proposed model can serve as a useful tool for bioreactor design. The main outcome of the model is a mathematical relationship intended for bioreactor length selection when nitrate concentration at the inlet and the flow rate are known. Custom software was developed to solve the system of differential equations aiming to ensure the required nitrate removal efficiency.

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木屑反硝化生物反应器中硝酸盐去除——一种数学建模与PI控制相结合的方法

基于现场试验，建立了木片反硝化生物反应器去除硝酸盐的数学模型。采用求解微分对流反应方程非线性系统逆问题的方法，根据生物反应器的长度和流速来优化硝酸盐去除效率。该方法是通过包含非局部条件的算法和包含PI控制器来实现的。这允许通过使用PI控制器来调节不同流入硝酸盐浓度的流速。所提出的模型可作为生物反应器设计的有用工具。该模型的主要结果是当入口的硝酸盐浓度和流速已知时，用于生物反应器长度选择的数学关系。开发了自定义软件来求解微分方程组，旨在确保所需的硝酸盐去除效率。

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来源期刊

Journal of Environmental Engineering and Landscape Management 环境科学-环境科学

CiteScore

1.90

自引率

7.70%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Environmental Engineering and Landscape Management publishes original research about the environment with emphasis on sustainability.