Estimation and emissions from crop straw and animal dung in Tibet

Guanyi Chen; Ke Gao; Beibei Yan; Zeng Dan; Wenwu Zhou; Zhanjun Cheng

doi:10.1016/j.scitotenv.2018.03.029

Estimation and emissions from crop straw and animal dung in Tibet

Sci Total Environ. 2018 Aug 1:631-632:1038-1045. doi: 10.1016/j.scitotenv.2018.03.029. Epub 2018 Mar 16.

Authors

Guanyi Chen¹, Ke Gao², Beibei Yan³, Zeng Dan⁴, Wenwu Zhou⁴, Zhanjun Cheng⁵

Affiliations

¹ School of Environmental Science and Engineering, State Key Lab of Engines, Tianjin University, Tianjin 300072, China; School of Science, Tibet University, No. 36 Jiangsu Street, Lhasa 850012, Tibet Autonomous Region, China; Tianjin Engineering Research Center of Biomass-derived Gas and Oil, Tianjin 300072, China.
² School of Environmental Science and Engineering, State Key Lab of Engines, Tianjin University, Tianjin 300072, China.
³ School of Environmental Science and Engineering, State Key Lab of Engines, Tianjin University, Tianjin 300072, China; Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Tianjin University, Ministry of Education, Tianjin 300072, China. Electronic address: yanbeibei@tju.edu.cn.
⁴ School of Science, Tibet University, No. 36 Jiangsu Street, Lhasa 850012, Tibet Autonomous Region, China.
⁵ School of Environmental Science and Engineering, State Key Lab of Engines, Tianjin University, Tianjin 300072, China; Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Tianjin University, Ministry of Education, Tianjin 300072, China.

PMID: 29727930
DOI: 10.1016/j.scitotenv.2018.03.029

Abstract

Based on the statistics data, this paper estimated the quantity of biomass resource, and then the distribution of emissions from its combu3stion and gasification was analyzed in Tibet in 2015. The main conclusions are as follows: (1) biomass energy is rich in Tibet and its geographical distribution and quantity mainly depends on the relationship between ecological zones and the climate conditions. Crop straw is mainly distributed in Xigazê, Lasha, Qamdo and Shannan with the total quantity of 3.29×10⁶t/year; while animal dung is mainly distributed in Nagqu, Qamdo and Xigazê with the total quantity of 1.69×10⁷t/year. For the acquirable quantity of crop straw and animal dung is 7.27×10⁶t/year, mainly distributed in Nagqu, Qamdo and Xigazê. (2) The energy production potential of crop straw and animal dung in Tibet for combustion (thermal efficiency: 22.5%), HLG (system efficiency: 28.75% based on our investigation) and VLG (system efficiency: 38.75%) is 2.56×10¹⁰J/year, 3.28×10¹⁰J/year and 4.42×10¹⁰J/year, respectively. (3) Compared to the household combustion, the reduction of SO₂ is 72% with HLG and 97% with VLG, and the NOx reduction is 79% with HLG, 96% with VLG and 72% with gasification-combustion case.

Keywords: Biomass resource; Combustion; Emissions; Gasification; Tibet.

MeSH terms

Air Pollutants / analysis
Air Pollution / statistics & numerical data*
Biomass
Crops, Agricultural
Environmental Monitoring*
Manure / analysis*
Tibet

Substances

Air Pollutants
Manure