Characteristics of Nitrous Oxide Emission in Partial Nitritation Process Treating High Ammonia Wastewater

摘要：

　　A lab-scale SBR fed with synthetic high ammonia wastewater was operated under oxygen limited condition for partial nitritation.After 58 days operation,the ratio of ammonia to nitrite in effluent maintained between 1.00-1.25 and the partial nitritation has been successfully started up by increasing the influent ammonia concentration.Conversion of nitrogen andN20 emission during a single cycle was investigated.During a single cycle DO concentration maintained under 0.4 mg-L-1.NH4+-N concentration decreased from 410.46 mg.L-1to 257.26 mg-L-1,N02--N concentration increased from 162.90 mg-L-1 to 295.80 mg-L-1,N03--N concentration increased gradually from 27.01 mg -L-1 to 50.16 mg -L-1.The pH value increased from 7.94 to 8.01 and then returned to 7.96.Dissolved N20 generally maintain around 0.078 mg - L-1.The emission of N20 increaseing from 0.13 mg - L-1 to 1.13 mg-L-1 and down to 0.34 mg-L-1 then subsequently back up to 0.54 mg - L-1.The average rate of N20 emission was 0.84 mg·min1 in the initial stage,2.67 and 1.88 times more than the middle and the later stage respectively,the main reason is N20 accumulate in last settling phase.

关键词： SBR Nitrous oxide Partial nitritation Emission characteristics

作者: Lv Yongtao Ju Kai Wang Lei Zhang Xueling Sun Ting

作者单位: School of Environmental and Municipal Engineering, Xian University of Architecture and Technology, Xian 710055, China

会议类型: 国际会议

会议名称: 2013青岛国际脱盐大会(Qingdao International Conference 2013 on Desalination and Water Reuse)

会议地点: 青岛

会议语种:英文

页码: 307-312

在线出版日期: 2013-06-25（万方平台首次上网日期，不代表论文的发表时间）