CAJ | 학술논문

N_2O是重要的温室气体之一,微生物作用是大气中N_2O的主要产生源.大量污水脱氮工艺的研究及应用表明,生物脱氮过程中N_2O主要产生于微生物的硝化和反硝化代谢过程.近年来,许多新型生物脱氮工艺已逐步应用到实际污水处理中.本文阐述了硝化、反硝化阶段N_2O的产生机理,并分析了传统生物脱氮工艺及同步硝化反硝化、短程硝化-反硝化、厌氧氨氧化、反硝化除磷等新型工艺中N_2O的产生量及其影响因素,提出在追求高脱氮效率的同时,优化系统运行条件及种群结构,可在一定程度上降低系统N_2O的产量及危害,为新型生物脱氮工艺实际运行过程中降低N_2O的产量提供参考.
N_2O시중요적온실기체지일,미생물작용시대기중N_2O적주요산생원.대량오수탈담공예적연구급응용표명,생물탈담과정중N_2O주요산생우미생물적초화화반초화대사과정.근년래,허다신형생물탈담공예이축보응용도실제오수처리중.본문천술료초화、반초화계단N_2O적산생궤리,병분석료전통생물탈담공예급동보초화반초화、 단정초화-반초화、염양안양화、반초화제린등신형공예중N_2O적산생량급기영향인소,제출재추구고탈담효솔적동시,우화계통운행조건급충군결구,가재일정정도상강저계통N_2O적산량급위해,위신형생물탈담공예실제운행과정중강저N_2O적산량제공삼고.
Nitrous oxide(N_2O) is one of the important greenhouse gases.Microbial activities are the source of N_2O in the atmosphere.Many studies and applications of wastewater nitrogen removal processes indicated that N_2O is mainly produced during both nitrification and denitrification in biological wastewater treatment processes.Currently,a lot of novel technologies been developed would be applied in practical treatment gradually.The mechanics of N_2O emission in nitriflcation and denitrification are discussed here.Moreover,this article analyzes N_2O emission and discusses the influence factors in traditional process and novel processes,which include simultaneous nitrification and denitrification,shortcut nitrification and denitrification,ANAM-MOX,denitrifying dephosphatation and so on,arising it would be reducing the N_2O production through optimizing operating condition and microbiological mechanism while pursuing high efficiency of nitrogen removal.This article can provide references for reducing N_2O emission in novel nitrogen removal processes.