title: Effects of co-processing sewage sludge in cement kiln on NOx, NH3 and PAHs emissions.
abstract: The effects of co-processing sewage sludge in cement kiln on NOx, NH3 and PAHs emissions were systematically investigated in a cement production line in Beijing. The results show that co-processing the sewage sludge was helpful to reduce NOx emission, which primarily depends on the NH3 amount released from the sewage sludge. Meanwhile, NOx and NH3 concentrations in the flue gas have a negative correlation, and the contribution of feeding the sewage sludge to NOx removal decreased with the increase of injection amount of ammonia water in the SNCR system. Therefore, it is suggested that the injection amount of ammonia water in SNCR system may reduce to cut down the operating costs during co-processing the sewage sludge in cement kiln. In addition, the emission of total PAHs seems to increase with the increased amount of the sewage sludge feeding to the cement kiln. However, the distributions of PAHs were barely changed, and lower molecular weight PAHs were mainly distributed in gaseous phase, accounted for the major portion of PAHs when co-processing sewage sludge in cement kiln.
authors.affiliation: School of Space and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Lv
authors.affiliation: School of Space and Environment, Beihang University, Beijing, 100191, China. Electronic address: zhutl@buaa.edu.cn.
authors.forename: Tianle
authors.initials: T
authors.lastname: Zhu
authors.affiliation: Beijing Taihang Qianjing Cement Co., Ltd, Beijing, 102471, China.
authors.forename: Runwei
authors.initials: R
authors.lastname: Liu
authors.affiliation: School of Space and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Qingzhi
authors.initials: Q
authors.lastname: Lv
authors.affiliation: School of Space and Environment, Beihang University, Beijing, 100191, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Wang
authors.affiliation: Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000641:Ammonia / Q000032:analysis*; D000068476:Beijing; D004784:Environmental Monitoring; D017745:Incineration; D009584:Nitrogen / Q000032:analysis*; D010100:Oxygen / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D000393:Air Pollutants; D011084:Polycyclic Aromatic Hydrocarbons; D012722:Sewage; C041364:nitrox; D000641:Ammonia; D009584:Nitrogen; D010100:Oxygen
keywords: Cement kiln; NH(3); NO(x); PAHs; Sewage sludge