Evaluation of Environmental Load and Cost of PET Bottle Recycling Systems

我们考察了目前的PET瓶回收系统是否会减少环境负荷和成本。并从消费者意识的角度审视了PET瓶再生产产品的发展规划。研究得到的结果如下所示。(1) PET瓶回收减少了环境负荷。由于原材制瓶和焚烧制瓶的co2排放量较大。2)如果PET瓶回收率高，可以通过回收来降低成本。因为，用原始材料制造PET瓶比用回收材料制造PET瓶成本更高。(3)为了降低PET瓶回收中的环境负荷和成本，提高回收率至关重要。(4)从环境负荷、成本和居民的接受意愿三个方面对每个瓶进行了原生PET瓶、回收PET瓶和再利用PET瓶的评价。因此，当PET瓶回收率在50%以下时，评价原生PET瓶为最佳。当PET瓶的回收率在50%以上时，对PET瓶的回收评价最好。(5)关于PET瓶的再生产商品，一个回收PET瓶的居民接受意愿较好。(6)对于再生产品而不是回收PET瓶，年轻一代认为价格比环境负荷更重要。然而，老一辈人认为环境负荷比价格更重要。在再生产产品的开发中，有必要考虑到这种差异。通过上述结果，我们完成了所有课题的研究。

We examined whether the present PET bottles recycling system would be reduction of environmental load and cost. Furthermore, the development plans of the reproduction goods of PET bottle were examined from a consumer's consciousness. The results obtained by research are shown below.(1)Environmental load is reduced by PET bottle recycling. Because, CO_2 emission of the bottle manufacturing by virgin material and the incineration are large.2)If the recovery rate of PET bottle is high, cost can be reduced by recycling. Because, it is higher for cost to manufacture PET bottles by virgin material rather than recycling material.(3)In order to reduce environmental load and cost in PET bottle recycling, it is important to raise the recovery rate.(4)We evaluated every each bottle the virgin PET bottles, the recycling PET bottles and the reuse PET bottles by environmental load, cost and the acceptance intention of the residents. As a result, when the recovery rate of PET bottles is 50% or less, evaluation of virgin PET bottles is the best. When the recovery rate of PET bottles is 50% or more, evaluation of recycling PET bottles is the best.(5)About the reproduction goods of PET bottles, the acceptance intention of the residents of a recycling PET bottle is good.(6)About reproduction goods other than recycling PET bottles, the young generations consider that a price is important rather than environment load. However, the elderly generations consider that environment load is important rather than the price. It is necessary to take this difference into consideration in development of reproduction goods.By the above result, we attained the all subjects of research.