In this study, The actual amount of greenhouse gas (CO2) emissions emitted from MSW incineration facilities nationwide was evaluated, in consideration of power generation and use of residual heat. As results, the CO2 emissions from incineration facilities were reduced by 55% considering power generation and 30% considering the use of waste heat. (Conversion by coal fired power).
Since new incineration facilities have highly good energy efficient, the incineration facility with the power generation facility can be good measures for reducing greenhouse effect when rebuilding old incineration facilities. As for the use of the residual heat, it was found that the plan for using residual heat at the start of operation of each facility is greatly affected rather than the scale of the facility and the start year of use.

View full abstract

In recent years, wooden biomass power generations have been paid attention which utilize local wooden resources toward low carbon society. In 2015, Japan feed in tariff system has been amended to set up higher price of 40 yen/kWh for small-sized power generation of less than 2000 kW with unutilized thinned wood, and this would be expected to enhance small-sized wood biomass power generation. Combined heat and power systems would be effective to increase business feasibility, and a few cases can be seen to introduce small-sized CHPs, developed in Europe. In this research, feasibility was analyzed for small-sized wooden biomass CHPs as a case study for facility gardening in Wakayama. This research aims to figure out factors which influence business feasibility including drying process of wooden biomass.

View full abstract

We carried out the Web questionary survey to clarify whether food loss increased by ordering an instagrammable dish for the purpose of posting its photograph on SNS, and leaving it.

As a result, 38% of people, that was thought more than half of SNS users, photographed a dish at the time of eating out and posted the photograph on SNS. The person who posted the photograph of the dish on SNS ordered a dish if photogenic. The persons who ordered a photogenic dish because of “super large serving”, “sharing with my follower”, or “getting Good on SNS” significantly had a big leftover frequency statistically in comparison with the person who did not take a photograph of dish or not post a photograph on SNS, and also in comparison with their everyday meal. As the availability of SNS is a tendency to increase, the leftovers may increase by ordering an instagrammable dish for the purpose of posting its photograph on SNS.

View full abstract

[in Japanese]

View full abstract

SDG target 12.3 calls for halving food waste at retail and consumer stages, across the world. However there exist several definitions for "food loss and waste", and there are no internationally established methods for measurement. Policy implications differ according to the way the indicator is set up, e.g. whether to emphasise recycling or reduction at source. I will present the various approaches by FAO, UK-WRAP, EU-FUSIONS et al. The main discordances are on which stages of generation and which destinations are included, as well as the distinction of edible (avoidable) and inedible (unavoidable) parts. The presenter wishes to have an interaction with the floor, on the way(s) forward, including how to reconcile the current Japanese usage of "shokuhin rosu" with the internationally prevalent usage of "food loss" which applies to the production and processing stages of food.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

In this report, the impacts of Chinese waste import restrictions in Thailand is summarized by trade statistics. In particular, the import volume of waste plastics has changed, because it has become difficult to export to China from 2018.For consecutive smugglings and improper imports, the competent authorities are conducting inspections of containers at ports and recycling plants. As a future measure, they are considering all inspections by the X-ray systems in the short term, and total import ban of E-waste and waste plastics in the long term.However, total import ban deprives companies of business opportunities, which have properly acquired import permits for waste plastics and E-waste and are recycling. In addition to controlling the proper international resource recycling, there is also a need for a policy to create an appropriate recycling market in Thailand.

View full abstract

[in Japanese]

View full abstract

Discreet educational method of model calming down is shown to a volunteer leader using a video in Shanghai as well as a volunteer stands next to the morning and evening trash can and is guiding in trash discretion. Moreover it's possible to give a point to the person who knew trash every morning using smart phone and exchange it for something of socks. I have to continue the guidance for about 4 years, trash discretion isn't fixed.
On the other hand I'm making a trash discreet table and a trash discreet handbook, am doing the whole family distribution, am doing an explanatory meeting of trash discretion by a ward office staff by each area and am guiding at the ward part in Tokyo. A resident is doing trash discretion for the most part by such guidance.
I'm commissioning local university and nongovernmental organization to compare and examine about trash discreet guidance in Shanghai and Tokyo by Shanghai city government.
But even if trash discreet guidance in the ward part in Tokyo is adopted in Shanghai just as it is because there is big difference in the character of the resident and a custom in Shanghai and Tokyo, it's difficult to think that it's useful. I think Shanghai city should consult a success case in China.

View full abstract

In order to assess organizational and institutional capacities in solid waste management in developing countries, four development level indicators were defined; (A) Level of law, regulation, and institutional setup, (B) Organizational setup, (C) Financial setup, and (D) Waste management data availability. These indicators were applied for 16 countries of low to middle income level in Africa. The results showed that economic development was positively correlated with the capacity development in organizational and financial level (Indicators of (B), (C), and (D)), but less correlated with the institutional capacity (Indicator of (A)). It suggests that institution-bulding requires special effort independently from that for economic development.

View full abstract

This research aims to discuss how the informal sectors form a recovery network in the region and what significance it should have in the home electrical waste recovery system in China. Especially, we have focused on the local cities where the informal sectors are active, so that we carried out the case study of Hegang City, performing field study related to the personal collectors. As a result, regarding the formation of collection network, the informal sectors have the merit of flexible service, and taking into consideration the social and cultural background of China, it is observed that the relationship-building between collectors and consumers such as by using the human relationships and neighbor relations. Moreover, judging from the results of the questionnaire survey conducted on the consumers, it is clear that collection by personal collectors is still mainstream. Therefore, we should positively evaluate the informal sectors of the efficient recovery and the contribution to the reuse of second-hand appliances. Toward the solution of the problem of collecting home electrical waste, in particular the local cities have subjects the system's effectiveness is low, it seems that making the utilization of the abilities of the informal sectors is becoming a rather realistic approach.

View full abstract

[in Japanese]

View full abstract

Development process of ownership implemented in the solid waste management project in Juba, the Republic of South Sudan was studied. Typical activities was extracted such as i) study tour in Sudan, ii) lecture on Japanese history of solid waste management and iii) implementation of pilot project.

Development process of ownership is summarized that i) learn an ideal situation of solid waste management, ii) recognize the gap and issues, iii) find an associate, iv) sympathize with the purpose and role of administration of the solid waste management, v) accelerate the project by a feasible solution, vi) realize their own role and the way to solve the problem and finally vii) achieve the positive movement by themselves and the enhancement of county ownership.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

Position of Ayase Works in the development of human waste treatment technology

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

The effectiveness of the use of our "Disaster resilience evaluation tool for local waste management" in a training program was studied from the viewpoint of learning and Behavioral change. We held a one day training session in the "Disaster waste management specialist training program" organized by the Mie prefectural government in February 2018, and conducted a questionnaire survey to the participants asking thier thoughts on the evaluation tool and its effectiveness. Our analysis suggest that the evaluation tool is effective both in terms of learning and behavioral change, especially when it is used in a group.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

Valuable metals contained in Automobile Shredder Residue are intricately entwined with resin and fiber, which cannot be separated or recovered using existing separation technology. For this reason, these metals are currently unutilized without being recycled.
Not only for solving this problem, but also for an energy-efficient transformation of resin into alternative fuels to coal, the application of Low-temperature embrittlement technology to this treatment system was studied. In addition, necessary crushing and separation technologies were studied on a commercial scale system to effectively recover valuable metals from embrittled products.
As a result, the following three technologies were developed: thermal embrittlement technology that produces embrittled products with a high residual calorific value and good crushability, crushing technology that provides the ability to control particle size and has the toughness needed to deal with hard metals, and separation technology that makes it possible to recover valuable metals with high efficiency.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

We have proposed a phosphorus recycling system by the combination of phosphorus adsorption by foamed glass in waste water and recycling of recovered phosphorus with fertilizer. However, there are many unclear points about the phosphorus adsorption mechanism of the glass foam, and it is necessary to clarify this point in order to further improve the phosphorus adsorption ability. In this report, in order to elucidate the phosphorus adsorption mechanism of foamed glass, adsorption isotherm is measured and its reaction mode is analyzed. As a result, the phosphorus adsorption reaction of the foamed glass was adapted to Langmuir adsorption isothermal equation, suggesting that it is monomolecular layer adsorption on its surface. For the reaction rate model, it was suggested that the intraarticle diffusion model is most suitable. From the above results, the mechanism of phosphorus adsorption of foamed glass was discussed.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract