In the present work, the heat exchanging efficiency of a pilot-scale regenerative thermal oxidizer (RTO) during the thermal decomposition of volatile organic compounds (VOC) was studied using toluene as an example of a typical VOC under the following experimental conditions : raw gas mass flow rates of 1090-2550 kg・h − 1 , toluene decomposition temperatures of 973-1173 K, honeycomb heights of 0 . 9-1 . 5 m and valve switching intervals of 60-180 s . As a result, it was found that the thermal efficiency calculated from LPG fuel consumption and the decomposed toluene, gave a maximum value of 0 . 95 at a raw gas mass flow rate of 1810 kg・h − 1 in a honeycomb height of 1 . 5 m. Furthermore, it was found that a decrease in honeycomb height from 1 . 5 to 0 . 9 m caused insufficient preheating of the raw gas, which resulted in an increase in the concentration of toluene necessary in the raw gas from 340 to 530 ppm to achieve self-combustion of the toluene without additional heating by LPG fuel.
{"title":"Study on High-efficiency Heat Storage and Heat Release Conditions in a Pilot-scale Regenerative Thermal Oxidizer for Toluene Decomposition","authors":"S. Iijima, K. Nakayama, M. Kubota, H. Matsuda","doi":"10.3985/JJSMCWM.20.252","DOIUrl":"https://doi.org/10.3985/JJSMCWM.20.252","url":null,"abstract":"In the present work, the heat exchanging efficiency of a pilot-scale regenerative thermal oxidizer (RTO) during the thermal decomposition of volatile organic compounds (VOC) was studied using toluene as an example of a typical VOC under the following experimental conditions : raw gas mass flow rates of 1090-2550 kg・h − 1 , toluene decomposition temperatures of 973-1173 K, honeycomb heights of 0 . 9-1 . 5 m and valve switching intervals of 60-180 s . As a result, it was found that the thermal efficiency calculated from LPG fuel consumption and the decomposed toluene, gave a maximum value of 0 . 95 at a raw gas mass flow rate of 1810 kg・h − 1 in a honeycomb height of 1 . 5 m. Furthermore, it was found that a decrease in honeycomb height from 1 . 5 to 0 . 9 m caused insufficient preheating of the raw gas, which resulted in an increase in the concentration of toluene necessary in the raw gas from 340 to 530 ppm to achieve self-combustion of the toluene without additional heating by LPG fuel.","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115824452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proposal for Intervention System to Prevent Household Food Loss and Promote Waste Reduction","authors":"Y. Kimura, Mizuho Sato, N. Kohtake","doi":"10.3985/jjsmcwm.34.1","DOIUrl":"https://doi.org/10.3985/jjsmcwm.34.1","url":null,"abstract":"","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116850567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study of Electrolysis Treatment of Persistent Organic Matter in Leachate","authors":"J. Liu, M. Shigematsu, Kazuo Tameda, S. Higuchi","doi":"10.3985/jjsmcwm.33.235","DOIUrl":"https://doi.org/10.3985/jjsmcwm.33.235","url":null,"abstract":"","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117182847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takao Hanashima, M. Soeda, Kazuo Tameda, S. Higuchi
CaCl 2 , NaCl, and other byproducts generated by waste treatment are landfilled as fly ash. Cl − dissolved in leachate is discharged to public water, which has an impact on agriculture and marine resources. Therefore, concentrate and dry salt (hereafter referred to as by-product salt) are generated by desalting treatment fa-cilities. This study was conducted on the possibility of recycling by-product salt as a disinfection material for wastewater treatment by generating NaClO and other compounds from it by electrolysis. As a result, a mix-ture liquid (hereafter referred to as eco hypochlorite) of NaClO and KClO with an effective chlorine concentration of above 5 , 000 mg/L was generated by a diaphragm-free electrolysis method with the concentration of salt water at 3 % and Ca 2 + at 30 mg/L. In the sterilization capacity test of eco hypochlorite, it was con-firmed that its capacity is equal to or greater than that of industrial NaClO. According to the feasibility study, when the amount of dried by-product salt is more than 0 . 5 t/day (equivalent to the amount of by-product salt generated from a city of 100 , 000 people) and recycled as disinfection material in a sewage treatment facility, it will provide economic merits to both the source (final disposal site) and the user (sewage).
{"title":"Study on Recycling Byproduct Salts from Waste Treatment as Disinfection Materials","authors":"Takao Hanashima, M. Soeda, Kazuo Tameda, S. Higuchi","doi":"10.3985/jjsmcwm.31.158","DOIUrl":"https://doi.org/10.3985/jjsmcwm.31.158","url":null,"abstract":"CaCl 2 , NaCl, and other byproducts generated by waste treatment are landfilled as fly ash. Cl − dissolved in leachate is discharged to public water, which has an impact on agriculture and marine resources. Therefore, concentrate and dry salt (hereafter referred to as by-product salt) are generated by desalting treatment fa-cilities. This study was conducted on the possibility of recycling by-product salt as a disinfection material for wastewater treatment by generating NaClO and other compounds from it by electrolysis. As a result, a mix-ture liquid (hereafter referred to as eco hypochlorite) of NaClO and KClO with an effective chlorine concentration of above 5 , 000 mg/L was generated by a diaphragm-free electrolysis method with the concentration of salt water at 3 % and Ca 2 + at 30 mg/L. In the sterilization capacity test of eco hypochlorite, it was con-firmed that its capacity is equal to or greater than that of industrial NaClO. According to the feasibility study, when the amount of dried by-product salt is more than 0 . 5 t/day (equivalent to the amount of by-product salt generated from a city of 100 , 000 people) and recycled as disinfection material in a sewage treatment facility, it will provide economic merits to both the source (final disposal site) and the user (sewage).","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"213 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114577657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Standardization of the Combustion Gas formed from Combustible MSW Incineration Processes","authors":"Yasuo Shino","doi":"10.3985/JJSMCWM.29.164","DOIUrl":"https://doi.org/10.3985/JJSMCWM.29.164","url":null,"abstract":"","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115413564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Environmental Impact Assessment of Nationwide Introduction of Plant Biomass Mixed Dehydration Systems at Wastewater Treatment Plants","authors":"Yukiyo Yamazaki, H. Shigemura","doi":"10.3985/jjsmcwm.33.54","DOIUrl":"https://doi.org/10.3985/jjsmcwm.33.54","url":null,"abstract":"","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114558731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study on Moisture Movement in Solid Waste Landfill with Cover Soil Layers","authors":"T. Shimaoka, Teppei Komiya, Naoko Komiya, Kentaro Miyawaki, M. Hanashima","doi":"10.3985/JJSMCWM.21.67","DOIUrl":"https://doi.org/10.3985/JJSMCWM.21.67","url":null,"abstract":"本研究では，セル工法の採用により埋立廃棄物が即日覆土で囲まれた「覆土膜構造」を有する廃棄物埋立地における水分移動現象を明らかにすることを目的に，覆土を施工した二次元大型埋立模型槽を用いて自然降雨による長期浸透実験および人工降雨による短期浸透実験を行った。また，不飽和浸透流解析により，覆土層の傾斜角度や配置が廃棄物埋立地の雨水浸透に及ぼす影響について検討した。セル工法で覆土を施工した場合，傾斜した覆土層が存在し，覆土層の下の廃棄物層へは雨水が浸透しにくく，廃棄物層内で水分移動の偏りが生じること，覆土層の傾斜角度が小さいほど雨水浸透の偏りが緩和されることが確認された。また，埋立廃棄物が成層していく場合，各層の覆土傾斜部の水平位置がずれることによって，雨水浸透の偏りが緩和されることが示唆された。","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114854226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Guideline for Municipal Solid Waste Treatment Systems (hereafter referred to as The Guideline ) established by Japanʼs Ministry of Environment, is, among other things, an aid that can be used by local governments to better communicate with their residents. We examined the effect of providing information based on The Guideline using a citizenʼs evaluation of their local municipal solid waste treatment services : a questionnaire was conducted in four target cities and participants were then divided into two groups. One group was shown diagrams showing the status of waste generation and its treatment in their city based on suggestions noted in The Guideline , while the other group was not provided with any sort of supplemental information. Appending appropriate interpretations to the diagrams was found to be important because information prepared based on the Guideline tended to lower the respondentsʼ evaluations of municipal solid waste treatment. We suggest that when citizens have a basic familiarity with the local waste management administration and rely upon it, even negative information does not affect their evaluations. With this in mind, we strongly encourage prioritizing the building up of close relationships based on mutual trust between citizens and local government, using The Guideline as a tool for such communication.
{"title":"Communicating with local residents on The Guideline for Municipal Solid Waste Treatment Systems in Japan","authors":"Eiko Kojima, M. Osako, N. Hara, Takashi Akiyama","doi":"10.3985/JJSMCWM.26.71","DOIUrl":"https://doi.org/10.3985/JJSMCWM.26.71","url":null,"abstract":"The Guideline for Municipal Solid Waste Treatment Systems (hereafter referred to as The Guideline ) established by Japanʼs Ministry of Environment, is, among other things, an aid that can be used by local governments to better communicate with their residents. We examined the effect of providing information based on The Guideline using a citizenʼs evaluation of their local municipal solid waste treatment services : a questionnaire was conducted in four target cities and participants were then divided into two groups. One group was shown diagrams showing the status of waste generation and its treatment in their city based on suggestions noted in The Guideline , while the other group was not provided with any sort of supplemental information. Appending appropriate interpretations to the diagrams was found to be important because information prepared based on the Guideline tended to lower the respondentsʼ evaluations of municipal solid waste treatment. We suggest that when citizens have a basic familiarity with the local waste management administration and rely upon it, even negative information does not affect their evaluations. With this in mind, we strongly encourage prioritizing the building up of close relationships based on mutual trust between citizens and local government, using The Guideline as a tool for such communication.","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127370337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of Seeding Material Made from Organic Waste for Sewage Treatment Tanks","authors":"Yingjie Dai, Y. Kojima, J. Matsuda, Shunitz Tanaka","doi":"10.3985/JJSMCWM.20.189","DOIUrl":"https://doi.org/10.3985/JJSMCWM.20.189","url":null,"abstract":"有機性廃棄物からなるシーディング剤の汚水浄化能を確認し，シーディング剤と下水活性汚泥との浄化処理効果を比較することを目的として，実験室規模の汚水処理実験を行った。化学的酸素要求量，pH，透視度，一般生菌数，浮遊物質，活性汚泥量などを測定項目として，汚水浄化効果を評価した。シーディング剤と下水活性汚泥の汚水処理能力はほぼ同一であったが，シーディング剤を添加することで汚泥発生量が少なくなった。シーディング剤は浄化槽の特性にあった微生物群を補給し，特に浄化槽稼動初期において汚水処理能力を向上し，浄化効率をあげることが明らかとなった。","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127374886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rokuta Inaba, T. Tasaki, Eiko Kojima, Kosuke Kawai, Shigesada Takagi, K. Kushida
{"title":"Historical Analysis of Regional Biomass Recycling Considering Strategic Significance of Actions: —For Accumulation and Diffusion of Practical Wisdom—@@@――実践知の蓄積と普及のために――","authors":"Rokuta Inaba, T. Tasaki, Eiko Kojima, Kosuke Kawai, Shigesada Takagi, K. Kushida","doi":"10.3985/JJSMCWM.28.87","DOIUrl":"https://doi.org/10.3985/JJSMCWM.28.87","url":null,"abstract":"","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126794623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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