A Model for the Assessment of Urban Waste Recycling System focusing on Products and Wastes Transportation and Energy Concumption

本研究旨在评估并提出新的废物管理和回收系统，重点是城市地区的产品的动脉流和废物的静脉流。本研究主要针对关东地区的家电产品市场和回收流程，以及木屑、废弃房屋的木材、草等生物质废弃物，以及废弃塑料等有机物，进行了两方面的研究：一是家电产品的生命周期评价模型，即家电产品的生命周期评价模型，二是家电产品的生命周期评价模型。冰箱，空调，电视和洗衣机根据回收低。在本研究中，LCA已经实现了估计过去的历史上的市场规模，平均重量，体积和寿命的生产年份。然后结合威布尔分布估计废品率。并对寿命期内的能耗进行了估算。对于运输阶段，我们开发了一个网络模型之间的交付点，消费城市，废物收集点和废物回收公司。并对回收后的家电产品的材料回收利用进行了研究。通过对填埋、物质回收、热回收和化学回收的比较，评价了有机废弃物的CO2减排效果和节能潜力;第二部分在实验的基础上，考察了以热回收为主的有机废弃物利用潜力，以物质回收为主的气化技术的潜力。对制氢过程进行了研究。本文比较了气化反应器、气化反应器和熔融反应器的节能减排潜力，并利用过程模拟器分析了三联产（即同时产生热、电和氢）的潜力。

This research aims at the assessment and to propose the new waste management and recycling system focusing on the aterial flow of products and venous flow of waste goods in urban area. We mainly deals with the market and recycle flows of electric appliances in Kanto area and biomass wastes such as wood chip, wood wastes from broken houses, grasses, etc. Waste plastics were also considered as organic materials.Our research constitutes of two activities : the one is the model of Life Cycle Assessment of electric appliances, i.e., refrigerators, air-conditioners, TV and washing machines according to the recycle low. In this study, the LCA has been achieved estimating the past history on the market size, average weight, volume and life time by produced year. The ratio of waste is then estimated allying Weibull distribution. The energy consumption during the life time is also estimated. For the transportation stage, we developed a network model among delivery points, consumption cities, the waste collecting points and the waste recycling firm. The material recycling of the collected appliance is also formulated. Comparing the landfilling, material recycling, thermal recycling and chemical recycling, we estimated the CO2 emission reduction effects and energy conservation potentials.In the second part, we investigated the potential of organic wastes utilization mainly focusing on the thermal recycling, material recycling focusing on the potential of gasification technologies based on the experiments. Hydrogen generation process is also studied. This study compares the potential energy conservation and carbon emission reductions among gasification reactors, gasification and melting reactors, The potential of trigeneration, where generating heat, electric power and hydrogen simultaneously is also analyzed using process simulator.