Journal Issue: EnNRJ Vol. 17 No. 1
Issued Date
2019
Resource Type
Language
tha
eng
eng
File Type
application/pdf
Access Rights
open access
Rights
ผลงานนี้เป็นลิขสิทธิ์ของมหาวิทยาลัยมหิดล ขอสงวนไว้สำหรับเพื่อการศึกษาเท่านั้น ต้องอ้างอิงแหล่งที่มา ห้ามดัดแปลงเนื้อหา และห้ามนำไปใช้เพื่อการค้า
Rights Holder(s)
Faculty of Environment and Resource Studies Mahidol University
Journal Volume
EnNRJ Volume 17
(2019)
Articles
Effect of the Waste Heat Recovery System to Buoyancy and Momentum Flux of Combustion Stack in the Cement Industry
(2019) Jutarat Keawboonchu; Wissawa Malakan; Wisit Thongkum; Sarawut Thepanondh; Mahidol University. Faculty of Public health. Department of Sanitary Engineering
Buoyancy and momentum fluxes are important parameters to determine the plume rise which is related to the ability to dilute air pollutants emitted from combustion stack sources. The change of temperature due to waste heat recovery directly affects these fluxes. This study analyzed buoyancy and momentum fluxes and evaluated the ground level concentration of PM-10 prior and after implementation of waste heat recovery in the area surrounding one of the largest cement production plants in Thailand. The results showed that the ambient temperature was the significant parameter affecting buoyancy and momentum fluxes. The buoyancy flux was found to be the dominant force to the rise of plume for both scenarios. There were no differences in the predicted PM-10 ground level concentrations at receptorsaround the cement plant for the model simulation under two scenarios. Therefore, it was concluded that decreasing of stack gas exit temperature does not affect the dispersion of air pollutants in the cement industry
Comparison of Carbon Footprint of Organic and Conventional Farming of Chinese Kale
(2019) Monthira Yuttitham; Mahidol University. Faculty of Environment and Resource Studies
This study compared the carbon footprint (CF) of organic agriculture with that of
conventional agriculture in the cultivation of Chinese kale. The farm management
data collected included the use of chemical and organic fertilizers, and fossil fuel
for tillage, irrigation and transportation. Greenhouse gas emissions (GHG) were
calculated and added to the CF. The results showed that conventional agriculture
had a CF of 0.402±0.47 kg CO2e/kg Chinese kale. Proportion of CFs from:
chemical fertilizer (51%), transportation (21%), irrigation (19%), tillage (5%),
organic fertilizer (2%), herbicide (1%) and insecticide (1%), and organic
agriculture had a CF of 0.195±0.122 kg carbon dioxide CO2e/kg Chinese kale
(proportion of CFs from: transportation (81%) organic fertilizer (12%) and fossil
fuel for irrigation (7%). The CFs differed, depending on farm management, and that
of conventional agriculture was almost double that of organic agriculture because
of the higher emissions from use of chemical fertilizers and of fossil fuel for tillage,
herbicide and insecticide applications. The conventional farm management led to
higher production per unit of planted area. Thus, it seems that conventional farming
has relatively higher CF than organic farming. There is still room for both
management practices to reduce their GHG emissions and their CFs by reduce
chemical fertilizer and fossil fuel use in conventional farming. The promotion of
organic farming practices will help to improve sustainable, environmentally
friendly agricultural production of Chinese kale in Thailand.
Title
EnNRJ Vol. 17 No. 1
Author's Affiliation
Mahidol University. Faculty of Environment and Resource Studies
มหาวิทยาลัยมหิดล. คณะสิ่งแวดล้อมและทรัพยากรศาสตร์
มหาวิทยาลัยมหิดล. คณะสิ่งแวดล้อมและทรัพยากรศาสตร์
Keyword(s)
Climate change
Biodiversity
Disaster
Ecological
Environmental modelling
Environmental dynamics
Environmental pollution
Emerging contaminants
Transboundary pollution
Waste and wastewater treatments
Hazardous wastes
Natural resource management
Multidisciplinary sciences
Environment and Natural Resources Journal
Biodiversity
Disaster
Ecological
Environmental modelling
Environmental dynamics
Environmental pollution
Emerging contaminants
Transboundary pollution
Waste and wastewater treatments
Hazardous wastes
Natural resource management
Multidisciplinary sciences
Environment and Natural Resources Journal