Journal
JOURNAL OF CLEANER PRODUCTION
Volume 379, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2022.134504
Keywords
Non-thermal plasma; Double dielectric barrier discharge; Sewage sludge composting facility; Volatile organic compounds; Plasma-catalyst reaction
Categories
Funding
- National Key R&D Pro-gram of China
- Key R&D Program of Ningxia Hui Autonomous Region
- Key Technology Develop-ment & Demonstration on Food Waste Recycling and Utilization
- [2018YFD1100605]
- [2020BFG02001]
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Double dielectric barrier discharge (DDBD) reactors were used to efficiently remove volatile compounds (VCs) from the exhaust gas of a sewage sludge composting facility. The combination of plasma and catalyst showed enhanced removal performance, especially when the initial concentration was low.
Double dielectric barrier discharge (DDBD) reactors were used to evaluate the removal efficiency of volatile compounds (VCs) from the exhaust gas of sewage sludge (SS) composting facility at optimal conditions, i.e., input power 65.8W, gas feeding rate 4 L/min, plasma discharge gap 6 mm. Abatement of VCs from different processing periods of SS composting was determined. 100% removal of major species of VCs (methyl isobutyl ketone, carbon disulfide, chlorobenzene and methylene chloride, etc.) were determined during the 'before turning (B.T)' and '5 h after turning (A.T)' process. In addition, the synergistic effect of plasma-catalyst (Pt-Sn/Al2O3, BaTiO3 and HZSM-5) on VCs abatement showed enhanced removal performance as the formation of reactive species (H and OH radicals) was increased, especially on the surface of the catalyst. Nevertheless, plasma alone and plasma -catalyst combine systems showed the most effective reduction in odor concentration at the 'B.T' process due to low initial concentration. The study could facilitate NTP-DDBD technology application and process optimi-zation in exhaust gases treatment of composting plants.
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