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Management of Flood Waste in Small and Medium Scale Asian Cities in Tropical Region
( Tomonori Ishigaki ),( Kosuke Kawai ),( Rieko Kubota ),( Komsilp Wangyao ),( Pham Khac Lieu ),( Sirintornthep Towprayoon ),( Chart Chiemchaisri ),( Masato Yamada ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 3RINCs초록집 Vol.2015 No.-
This study reports on the challenges to a model of resilient and adaptable SWM against flood in Asian tropical/pluvial countries, in order to adapt to frequent flood events that would be influenced by climate change. Collapse of Solid waste management by sudden natural disasters will directly lead to collapse of city. Here we have summarized some cases of flood waste handlings in tropical Asian cities that were attacked by flood disasters recently. Mega-scale city like Bangkok should have enough capacity to handle of flood waste though the inundation of some part of capital must be a considerable worst situation. In contrast, small and medium scale cities easily lost their ability to administrate under flooding situation if the prepared ness was not sufficient. Situation of "vulnerable" against to flood must be improved for quick recovery from disaster, and waste management systems is also expected to be more resilient. The goal of this study is to draw a scheme of guidance to improve or upgrade the solid waste management system in middle or small scale cities that leads the cities to be resilient against to flood.
Noppharit Sutthasi,Chart Chiemchaisri,Wilai Chiemchaisri,Komsilp Wangyao,Sirintornthep Towprayoon,Kazuto Endo,Masato Yamada 대한환경공학회 2014 Environmental Engineering Research Vol.19 No.3
Leachate quality and methane emission from pilot-scale lysimeters operated under semi-aerobic and anaerobic conditions were monitored for 650 days. Two semi-aerobic lysimeters were filled with un-compacted and compacted municipal solid wastes whereas two anaerobic lysimeters containing compacted wastes were operated with leachate storage at 50% and 100% of waste height, respectively. Despite having high moisture in wastes and operating under tropical rainfall events, leachate stabilization in semi-aerobic lysimeters took place much faster resulting in BOD reduction by 90% within 60 days, significantly shorter than 180?210 days observed in anaerobic lysimeters. Nitrogen concentration in leachate from semi-aerobic lysimeter could be reduced by 90%. In term of gas emission, semi-aerobic lysimeter with un-compacted wastes had much lower methane emission rate of 2.8 g/m2/day compare to anaerobic lysimeters (62.6 g/m2/day) through seasonal fluctuation was observed. Nevertheless, semi-aerobic lysimeter with waste compaction has similar performance to anaerobic lysimeter.
Investigation of CO2 adsorption by bagasse-based activated carbon
Anusorn Boonpoke,Amnat Chidthaisong,Siriluk Chiarakorn,Navadol Laosiripojana,Sirintornthep Towprayoon 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.1
Bagasse-based activated carbon (BAC) and amine-modified BAC were prepared and investigated for CO2adsorption capacity. Modifying BAC with amines resulted in a decrease of surface area, but the decreasing magnitude varied depending on type and loading rate of amines. At room temperature, the unmodified BAC was able to adsorb more CO2 than the amine-modified BAC. This ability was related to the higher surface area of unmodified than that of the modified BAC. When temperature increased, CO2 adsorption capacity of all absorbents was decreased. However,above 323 K and a concentration of CO2 lower than 30% v/v, the BAC modified with PEI at 5 and 25 wt% showed higher adsorption capacity. Among all adsorbents under 15% CO2 and 348 K, BAC-PEI25 showed the highest adsorption capacity (0.20 mmol/g).