The co-removal of PCDD/Fs by SCR system in a full-scale municipal solid waste incinerator: Migration-transformation and decomposition pathways

Wang PengJu1; Yan Feng1,2; Xie Feng1; Cai JianJun1; Shen XueHua1; Wei XuanKun1; Huang JunBin3; Li ZhongZheng3; Zhong RiGang3; Zhang ZuoTai1,2

2022-09-01

10.1007/s11431-022-2127-y

Science China-Technological Sciences   Impact Factor & Quartile

1674-7321

1869-1900

Polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) generated from municipal solid waste (MSW) incineration are considered as the key pollutants, which could pose serious risks to the environment and ecology. This study comprehensively investigated the effect of selective catalytic reduction (SCR) system on PCDD/F removal, phase distributions, and migration-transformation characteristics of 17 congeners in a full-scale MSW incinerator. The three flue gas samples and two fly ash samples were separately collected for PCDD/F analysis. The results showed that the SCR system reduced the I-TEQ concentration of PCDD/Fs from 0.135 to 0.010 ng I-TEQ Nm(-3) with a remarkable toxicity removal efficiency of 92.6%, through oxidation decomposition over V2O5-WO3/TiO2 catalysts and chlorination process of low-chlorinated congeners. In addition, the de novo synthesis observed along the flue between SCR system and stack regenerated unexpected PCDD/Fs, which might enhance the PCDD/F emission level. This study verified the three pathways of SCR system on PCDD/F removal and inspired operating suggestions for SCR system, i.e., keeping SCR system operated in stable and consistent conditions, regularly replacing V2O5-WO3/TiO2 catalysts, and timely cleaning the dusts and inlet materials of SCR system, which would be beneficial for achieving the ultra-low emission of PCDD/Fs in full-scale MSW incinerators.

municipal solid waste (MSW) incineration polychlorinated dibenzo-p-dioxins and furans (PCDD Fs) selective catalytic denitrification (SCR) phase partitioning removal mechanism

SCI ; EI

English

First ; Corresponding

National Key R&D Program of China[2018YFC1902904] ; National Natural Science Foundation of China[22008104] ; Shenzhen Science and Technology Innovation Committee["JCYJ20200109141642225","JCYJ20200109141227141","JSGG20210713091810035"] ; Shenzhen Peacock Plan[KQTD20160226195840229] ; Basic and Applied Basic Research Foundation of Guangdong Province[2021A1515010148] ; Young S&T Talent Training Program of Guangdong Provincial Association for ST[SKXRC202230]

Engineering ; Materials Science

Engineering, Multidisciplinary ; Materials Science, Multidisciplinary

WOS:000852097200001

SCIENCE PRESS

20223712723536

Aromatic compounds ; Catalysts ; Fly ash ; Municipal solid waste ; Selective catalytic reduction ; Tungsten compounds ; Vanadium pentoxide ; Waste incineration

Air Pollution Control:451.2 ; Municipal and Industrial Wastes; Waste Treatment and Disposal:452 ; Industrial Wastes Treatment and Disposal:452.4 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen 518055, Peoples R China
2.Key Lab Municipal Solid Waste Recycling Technol &, Shenzhen 518055, Peoples R China
3.Shenzhen Energy Environm Co Ltd, Shenzhen 518055, Peoples R China

Wang PengJu,Yan Feng,Xie Feng,et al. The co-removal of PCDD/Fs by SCR system in a full-scale municipal solid waste incinerator: Migration-transformation and decomposition pathways[J]. Science China-Technological Sciences,2022.

Wang PengJu.,Yan Feng.,Xie Feng.,Cai JianJun.,Shen XueHua.,...&Zhang ZuoTai.(2022).The co-removal of PCDD/Fs by SCR system in a full-scale municipal solid waste incinerator: Migration-transformation and decomposition pathways.Science China-Technological Sciences.

Wang PengJu,et al."The co-removal of PCDD/Fs by SCR system in a full-scale municipal solid waste incinerator: Migration-transformation and decomposition pathways".Science China-Technological Sciences (2022).