N2O Emission from Partial Nitrification and Full Nitrification in Domestic Wastewater Treatment Process

被引：4

作者：

Li, Pengzhang ^{[1
]}

Peng, Yongzhen ^{[2
]}

Wang, Shuying ^{[2
]}

Liu, Yue ^{[2
]}

机构：

[1] Yancheng Inst Technol, Dept Municipal Engn, Yancheng 224051, Peoples R China

[2] Beijing Univ Technol, Engn Res Ctr Beijing, Engn Lab Adv Municipal Wastewater Treatment & Reu, Beijing 100124, Peoples R China

来源：

WATER | 2022年 / 14卷 / 20期

基金：

国家重点研发计划;

关键词：

N2O; domestic wastewater; partial nitrification; full nitrification; greenhouse gas reduction; AMMONIA-OXIDIZING BACTERIA; NITROUS-OXIDE PRODUCTION; DENITRIFICATION; REMOVAL; MECHANISMS; REDUCTION;

D O I：

10.3390/w14203195

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Using actual domestic wastewater as the research object, nitrogen compounds and their combinations were added to different nitrification (partial nitrification, full nitrification) processes to investigate nitrous oxide (N2O) emission and its nitrification mechanisms. The presence of influent NH4+ was the driving force of N2O emission during nitrification. Compared with full nitrification, NO2- in partial nitrification more readily generated N2O by denitrification. Under the proportional gradient of NH4+-N:NO2--N/NO3--N, 30:0, 20:10, 10:20, and 0:30, total N2O emissions during partial nitrification were 2.81, 11.30, 65.20, and 11.67 times greater than the total N2O emissions during full nitrification. Full nitrification was more beneficial to N2O emission reduction. This provides a control strategy for N2O emission reduction in wastewater treatment processes under the background of reducing the production of greenhouse gases.

引用

页数：7

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