渗滤液处理中反硝化碳源的筛选及应用

Screening and Application of Denitrification Carbon Sources in Leachate Treatment

通过在试验室模拟渗滤液处理过程中的生化单元,对比反硝化速率、碳氮比、可生化性和含氮杂质情况,评估7种不同的反硝化碳源,并在此基础上研究工程应用效果。结果表明:试验室初步筛选出的最具潜力的碳源在工程应用中,各项指标(出水水质、反硝化速率和污泥系数)均同甲醇作为反硝化碳源时水平一致,从经济性方面考虑,当甲醇的市场采购单价高于2 800元/t时,复合碳源更具价格优势,反之建议选用甲醇作为反硝化碳源。

By simulating the biochemical units in the process of leachate treatment in the laboratory,the denitrification rate,carbon nitrogen ratio,biodegradability,and nitrogen impurities were compared,and seven different denitrification carbon sources were evaluated.Based on this,the engineering application effects were studied.The results indicate that the most promising carbon source preliminarily screened by the laboratory has the same level of indicators in engineering applications,such as effluent quality,denitrification rate,and sludge coefficient,as when methanol is used as the denitrification carbon source.From an economic perspective,when the market procurement unit price of methanol is higher than 2800 yuan/t,the composite carbon source has a more price advantage.Conversely,it is recommended to choose methanol as the denitrification carbon source.