研究氧化沟中进水波动时强化脱氮的离散时间动态控制模型。

Study on a discrete-time dynamic control model to enhance nitrogen removal with fluctuation of influent in oxidation ditches.

机构信息

State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.

出版信息

Water Res. 2010 Oct;44(18):5150-7. doi: 10.1016/j.watres.2010.01.019. Epub 2010 Feb 10.

DOI:10.1016/j.watres.2010.01.019

PMID:20655083

Abstract

The aim of study was proposed a new control model feasible on-line implemented by Programmable Logic Controller (PLC) to enhance nitrogen removal against the fluctuation of influent in Carrousel oxidation ditch. The discrete-time control model was established by confirmation model of operational conditions based on a expert access, which was obtained by a simulation using Activated Sludge Model 2-D (ASM2-D) and Computation Fluid Dynamics (CFD), and discrete-time control model to switch between different operational stages. A full-scale example is provided to demonstrate the feasibility of the proposed operation and the procedure of the control design. The effluent quality was substantially improved, to the extent that it met the new wastewater discharge standards of NH(3)-N<5mg/L and TN<15 mg/L enacted in China throughout a one-day period with fluctuation of influent.

摘要

本研究旨在提出一种新的控制模型，该模型可通过可编程逻辑控制器（PLC）在线实现，以增强卡罗塞尔氧化沟对进水波动的脱氮能力。该离散时间控制模型是通过基于专家访问的操作条件确认模型建立的，该模型是通过使用活性污泥模型 2-D（ASM2-D）和计算流体动力学（CFD）进行模拟获得的，离散时间控制模型可在不同操作阶段之间切换。提供了一个实际案例来说明所提出的操作的可行性和控制设计过程。出水质量得到了显著改善，在一天的时间内，进水波动的情况下，出水氨氮（NH3-N）<5mg/L 和总氮（TN）<15mg/L，达到了中国新的废水排放标准。