污水脱氮工艺外部碳源投加量计算方法探讨

为准确预测外部碳源的投加量,对污水厂进水的水质指标进行相关性分析,发现采用设计进水水质作为碳源投加工况设计水质是不合理的。为此,提出了一种预测碳源投加工况设计水质的方法,同时借鉴德国ATV标准中单段活性污泥法脱氮工艺的外部碳源投加量计算方法,并将该计算方法应用于南方某污水厂二期工程设计中,结果表明该污水厂2018年全年实际碳源投加量与设计值基本吻合。

Discussion on Calculation Method of External Carbon Source Dosage in Sewage Denitrification Process

The correlation analysis of influent quality indicators was carried out to accurately predict the dosage of external carbon source in sewage treatment plants. It was found that it was unreasonable to use the design water quality for detennining the carbon source dosage. A method for predicting carbon source dosage based on design water quality was proposed. Meanwhile, external carbon source dosage calculation method of single-stage activated sludge denitrification process in German ATV standard was used for reference, and the calculation method was applied to the second stage engineering design of a sewage treatment plant in South China. The results indicated that the actual carbon source dosage of the sewage treatment plant in 2018 was basically consistent with the design value.