再生水厂原水水质在线预警系统研究与应用
Research and application of on-line early warning system for source water quality of reclaimed water plant
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摘要: 再生水原水水质在线预警系统能够为再生水工艺安全、稳定的运行提供保障。以中国北方T市某再生水厂为例，分析再生水厂进水主要污染指标的变化规律，根据再生水厂的MBR处理工艺特征及要求，确定6项预警指标为pH、COD、TN、NH3-N、TP和SS。在原水水质在线监测系统的基础上，建立了基于神经网络的水质预测方法。结合实际运行情况，设置警级、警限，制定事故时的紧急应对方案，提出了建立原水在线预警系统的理论框架，并编制了原水水质在线预警软件。软件的试运行结果表明，再生水原水水质在线预警系统对于水质变化条件下进行报警、预测及调整工艺参数，实现再生水厂安全、稳定运行具有重要的意义。Abstract: On-line early warning system (EWS) for source water quality of reclaimed water plant could guarantee secure and stable operation of treatment process. A reclaimed water plant at T city in northern China was introduced as an example， variation of main pollution indicators for source water of the plant were analyzed and pH， COD， TN， NH3-N， TP and SS were selected as key early warning indicators according to the characteristics and requirement of MBR process in the plant. A water quality forecasting method coupling with artificial neural network was proposed based on on-line water quality monitoring system. Taking into account of historical operation records， warning levels were set and emergency response program were established. Theoretical framework of on-line source water EWS was presented and the EWS software was developed. The results demonstrated that the on-line source water EWS could optimize and adjust order and parameters of the treatment process in real time and it was a significant tool for secure and stable operation of reclaimed water plant.
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Key words:
- early warning system /
- reclaimed water plant /
- water quality /
- MBR
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