垃圾渗滤液微生物脱氮所需营养剂的性能评价
Performance Evaluation of Nutrients Required for Microbial Denitrification of Landfill Leachate

近年来，随着国家对环保要求的提高，对垃圾渗滤液的处理标准也越来越高。考虑到垃圾渗滤液高TN、高NH₃、高COD、高盐分等特征，生化法依然是必不可少的处理环节之一。其中微生物脱氮所需的外加营养剂不仅要能适应垃圾渗滤液不断变化的特殊水质，更要与现场工艺达到最佳的匹配性。通过实验室模拟某垃圾渗滤液填埋场的处理工艺，对比了不同营养剂的脱氮效果，发现高COD当量的复合型碳源营养剂可以更好地适应垃圾渗滤液水质特征，保持较高的反硝化效率，维持系统的碱度平衡，提高系统的脱氮效果，并且可生化性较强，残留COD降低，极大地提高了系统处理的效果和稳定性。
In recent years, with the improvement of the country’s environmental protection requirements, the treatment standards for landfill leachate are also getting higher and higher. Considering the high TN, high NH₃, high COD, high salinity and other characteristics of landfill leachate, biochemical method is still one of the essential processing links. Among them, the additional nutrients required for microbial denitrification should not only adapt to the changing special water quality of landfill leachate, but also achieve the best match with the on-site process. The denitrification effect of different nutrients was studied by simulating the treatment process of a landfill leachate in the laboratory. It is found that the composite carbon source nutrient with high COD equivalent can better adapt to the water quality characteristics of landfill leachate, maintain a high denitrification efficiency, maintain the alkalinity balance of the system, improve the denitrification effect of the system, and has strong biodegradability and reduced residual COD, which greatly improve the system processing effect and stability.