It was considered that,biological denitrogenation process featured by good treatment effect,stable technology and low cost,which should be the first choice for the engineering design.

• 认为生物脱氮技术处理效果较好,工艺稳定、处理成本低,是目前工程设计中应优先考虑的脱氮工艺,其中A/O、A2/O已成熟,而其它工艺有待进一步研究发展。