Proceedings of Korea-Japan Special Symposium on Technology and R&D Trends on Inorganic Waste Recycling : Emission of non-methane aliphatic hydrocarbons from waste Landfills

( Tomonori Ishigaki ),( Masato Yamada ),( Masanao Nagamori ),( Yusaku Ono ),( Yuzo Inoue ) 한국폐기물자원순환학회(구 한국폐기물학회) 2005 한국폐기물자원순환학회 심포지움 Vol.2005 No.1

Effect of superabsorbent polymers from diaper on biodrying process for municipal waste treatment

( Tomonori Ishigaki ),( Noppharit Sutthasil ),( Kosuke Kawai ),( Masato Yamada ) 한국폐기물자원순환학회 2022 한국폐기물자원순환학회 심포지움 Vol.2022 No.1

IS-25 : Potential of Anaerobic Biological Gas Generation of Waste in the Landfill under Post Cloure Care

( Tomonori Ishigaki ),( Masahiro Sato ),( Hiroyuki Ishimori ),( Kazuto Endo ),( Masato Yamada ) 한국폐기물자원순환학회(구 한국폐기물학회) 2013 한국폐기물자원순환학회 추계학술발표논문집 Vol.2013 No.-

Stabilization of landfill gas (LFG) generation is recognized as the critical indicator to evaluate the future possibility of environmental impact from the waste landfill. In comparison with leachate quality, the amount of LFG generation is considered more difficult to integrate the sequential monitoring results. Spatially and temporal high variation of the LFG generation and the emission would be influenced by the micrometeorological condition. One of the helpful information to predict the behavior of LFG generation is to estimate the remaining of LFG source in the waste. Biological degradation should decrease the amount of component that should be transformed LFG in the waste. Hence, the LFG generation potential of waste in landfill must be gradually decreased as time goes on. In order to support the assessment of the landfill stability from the viewpoint of LFG, the estimation of the potential of LFG generation of the landfilled waste has been investigated at the landfills that was received the waste incineration ash, slag, C&D inert residue, dredged soil, and so on. The LFG emission behavior has been predicted by using the remaining LFG potential, and it was validated by the investigation of surface LFG emission. Degraded organics by anaerobic incubation had been calculated by Buswell`s theoretical equation (Bockreis, et al. 2007). Objected samples that were excavated from 10-15 years old waste layer have shown the little potential of LFG generation (Table 1). A highest content of gasified organics was observed for 2.0m depth of C10 though it was less than 1% of the total weight of sample (dry weight). It would be strongly attributed to intensive pretreatment of waste before the landfilling. Since the landfill operator required the strict quality control for the waste to be disposed of, the content of organics in the waste should be enough low at the initial phase of landfill management. In addition, the effort of the landfill management to promote the biodegradation, such as the lowering of the water level in landfill layer, or ventilation of LFG, had contributed to reduce the biodegradable organics. Fig.1 shows the prediction of methane emission from the landfill. It also exhibited results of investigation of surface LFG emission. The prediction of landfill methane emission was developed by using the parameter that was obtained from excavated waste.

Behavior of Green House Gas Emission from Temporary Storage Sites for Disaster Waste Management

( Tomonori Ishigaki ),( Masahiro Sato ),( Yuka Ogata ),( Masato Yamada ) 한국폐기물자원순환학회(구 한국폐기물학회) 2014 한국폐기물자원순환학회 심포지움 Vol.2014 No.1

Huge amount of disaster waste was generated by the Great East Japan Earthquake and Tsunami. It was estimated that 20 million tons of disaster waste and 10 million tons of Tsunami debris has been generated at devastated area. Since local capacity of waste treatment was deficient for such a large quantity of disaster waste, temporary storage must be necessary until the establishment of appropriate management scheme. During a few year storage of disaster waste, several environmental impacts could be concerned. One of global impacts is the emission of greenhouse effect gases (GHGs) from the organics waste. In this study, the behavior of GHGs emission from the sites of temporary management for disaster waste has been investigated. The methane emission from the temporary storage pile of combustible fraction (mainly wood waste) was distributed from -0.0014 to 0.0023 L/hr/m². Arithmetic mean and coefficient of variance was 0.0013 L/hr/m²±88% and median was 0.0014 L/hr/m². The carbon dioxide emission was 1000 times higher than methane emission at that site. It indicated that the aerobic deterioration of organic waste in the temporary storage of combustible fraction would be dominated rather than anaerobic mechanism. On the other hand, The methane emission from the temporary disposal site of fishery waste was highly fluctuated from -0.024 to 30 L/hr/m². Arithmetic mean and coefficient of variance was 4.3 L/hr/m²±230% and median was 0.0087 L/hr/m². The waste degradation in the temporary disposal site of fishery waste must follow the anaerobic manner. The methane emission from the pile of combustible fraction by first order reaction model could be assumed 0.73 L-CH₄/hr/kg-waste (15 L-CO₂eq/hr/kg-waste), which was calculated as the emission at July 2011. The emission factor from unit waste was calculated as 87 L L-CH₄/ kg-waste (1830 L-CO₂eq/kg-waste).

Anaerobic generation of nitrous oxide in waste landfills

( Tomonori Ishigaki ),( Masato Yamada ),( Tomohiro Naruoka ) 한국폐기물자원순환학회 2011 ISWA Vol.2011 No.0

폐기물 매립지의 표면에서 지상 온도와 가스 흐름의 관계

( Tomonori Ishigaki ),( Bulent Inane ),( Yumiko Ohkouchi ),( Shino Mohri ),( Masato Yamada ),( Yuzo Inoue ),( Takashi Kozakai ),( Masanao Nagamori ),( Yusaku Ono ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.2

산업폐기물 매립지의 표면에서 배출되는 메탄을 조사하였다. 여름철에는 45군데에서 24군데가 겨울철에는 42군데에서 20군데가 메탄의 흐름을 보이지 않았다. 메탄의 유입은 몇 군데에서 발견되었고, 여름에 흐름 비율은 -0.29~370ml/m²/min 이고, 겨울에는 -0.50~109ml/m²/min의 범위이다. 지상의 온도와 메탄 흐름은 확실한 상호관계를 보인다. 전체 메탄 배출은 지상온도관계와 지상 온도의 분포를 기초로 하여 평가한다. 전체 매립지로부터 배출되는 메탄은 여름철과 겨울철에 각각 0.57m³/hr과 0.039m³/hr였다. Investigation on the methane emission from the surface of waste landfill that contains industrial waste was executed. . Twenty-four out of 45 points in summer and 20 out of 42 points in winter showed no methane flux. Influx of methane was observed in a few points, and flux rate ranged from -0.29 to 370 ml/m²/min in summer and from -0.50 to 109 ml/m²/min in winter. Ground temperature and methane flux showed certain correlation. Whole methane emission was estimated based on the correlation with ground temperature and the distribution of ground temperature. Estimated methane emissions from the whole landfill estimated were 0.57 m³/hr and 0.039 m³/hr in summer and winter, respectively.

Potential of Anaerobic Biological Gas Generation of Waste in the Landfill under Post Closure Care

Tomonori Ishigaki,Masahiro Sato,Kazuto Endo,Masato Yamada,Hiroyuki Ishimori 한국폐기물자원순환학회 2013 한국폐기물자원순환학회 학술대회 Vol.2013 No.2

Stabilization of landfill gas (LFG) generation is recognized as the critical indicator to evaluate the future possibility of environmental impact from the waste landfill. In comparison with leachate quality, the amount of LFG generation is considered more difficult to integrate the sequential monitoring results. Spatially and temporal high variation of the LFG generation and the emission would be influenced by the micrometeorological condition. One of the helpful information to predict the behavior of LFG generation is to estimate the remaining of LFG source in the waste. Biological degradation should decrease the amount of component that should be transformed LFG in the waste. Hence, the LFG generation potential of waste in landfill must be gradually decreased as time goes on. In order to support the assessment of the landfill stability from the viewpoint of LFG, the estimation of the potential of LFG generation of the landfilled waste has been investigated at the landfills that was received the waste incineration ash, slag, C&D inert residue, dredged soil, and so on. The LFG emission behavior has been predicted by using the remaining LFG potential, and it was validated by the investigation of surface LFG emission. Degraded organics by anaerobic incubation had been calculated by Buswell's theoretical equation (Bockreis, et al. 2007). Objected samples that were excavated from 10-15 years old waste layer have shown the little potential of LFG generation (Table 1). A highest content of gasified organics was observed for 2.0m depth of C10 though it was less than 1% of the total weight of sample (dry weight). It would be strongly attributed to intensive pretreatment of waste before the landfilling. Since the landfill operator required the strict quality control for the waste to be disposed of, the content of organics in the waste should be enough low at the initial phase of landfill management. In addition, the effort of the landfill management to promote the biodegradation, such as the lowering of the water level in landfill layer, or ventilation of LFG, had contributed to reduce the biodegradable organics. Fig.1 shows the prediction of methane emission from the landfill. It also exhibited results of investigation of surface LFG emission. The prediction of landfill methane emission was developed by using the parameter that was obtained from excavated waste.

Concept of Appropriate Treatment of Captured Wildlife in Conjunction with Waste Treatment System

( Tomonori Ishigaki ),( Satoru Ochiai ),( Masahiro Osako ),( Masato Yamada ) 한국폐기물자원순환학회(구 한국폐기물학회) 2016 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2016 No.-

In recent years in Japan, populations of wildlife such as Japanese deer and wild boars are rapidly increasing with the expansion of their habitats, which has caused serious damage to the ecosystem, agriculture, forestry, fisheries, and the living environment. Since the substantial treatment policy of captured wildlife as not been decided, hunting plan has not been implemented in most of municipality. In order to remove the influence on natural and living environment, the comprehensive management system on captured wildlife, as well as the infected livestock or radioactively polluted animals, must be established. Captured wildlife in local municipalities have not been well managed in the context of the waste management, and there are lots of issues to be solved such as the logistics from hunting zone to public road network, transportation to waste treatment facility, capacity of the municipal incinerators, safety management of disposal. Integrated management of captured wildlife would be achieved by sophisticated cooperation of the sectors of wildlife control and waste management, and a smooth connection to the existing waste management system must be a key issue on this cross-sectional implementation of the project. The Ministry of the Environment, Japan has given the target of the reduction of the number of the hunted designated species (Japanese deer and wild boar) to be double in comparison with that in FY2012. It would be estimated approximately two million, and more than 150 thousand tonnes of dead animal should be annually treated in waste facility additionally. This is a national target, but treatment duty will be owed by local municipalities. This study is going to elucidate the structure of technical problem on receiving the captured large wildlife at the municipal waste treatment facilities, and to investigate the smooth connection to existing waste management system in local scale. Case study of the logistical simulation of the treatment of a mass of livestock that died by natural disasters in local waste management system revealed that the necessity of pretreatment as volume reduction of the dead animals for transportation and for incineration. The pretreatment at hunting-scene will contribute to reduce the total efforts and costs for transportation though there are some technological and legal limitations in Japan. Central pretreatment should be more attractive and reasonable way of volume reduction of hunted wildlife to connect to the existing municipal waste management system.

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.

RELATIONSHIP BETWEEN GAS FLUX AND GROUND TEMPERATURE ON A SURFACE OF A WASTE LANDFILL SITE

( Tomonori Ishigaki ),( Bulent Inane ),( Yumiko Ohkouchi ),( Shino Mohri ),( Masato Yamada ),( Yuzo Inoue ),( Takashi Kozakai ),( Masanao Nagamori ),( Yusaku Ono ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.1

Investigation on the methane emission from the surface of waste landfill that contains industrial waste was executed. . Twenty-four out of 45 points in summer and 20 out of 42 points in winter showed no methane flux. Influx of methane was observed in a few points, and flux rate ranged from -0.29 to 370 ml/m²/min in summer and from -0.50 to 109 ml/m²/min in winter. Ground temperature and methane flux showed certain correlation. Whole methane emission was estimated based on the correlation with ground temperature and the distribution of ground temperature. Estimated methane emissions from the whole landfill estimated were 0.57 m³/hr and 0.039 m³/hr in summer and winter, respectively.