RECYCLING

Biography

Biography: Tiejun Dai

Abstract

In the background of fact that the problems of the resources and environment are serious day by day, waste paper, as an important secondary resource, has gradually become the most important raw material for paper making. Now the studies on environmental impact of waste paper recycling, which always use life cycle assessment, were mainly about comparison of different recycling strategy. Their results are non-monetary volume, which have difficulties on guiding enterprises to achieve win-win between economic and environmental. Therefore, in this paper, ecological cost is put forward and defined; its calculation model based on material flow was set up. Based on the material flow analysis, a standard ecological cost flow diagram (SECFD) was set up in waste paper recycling system, and the influence of deviating from SECFD on the ecological cost is analyzed. The rule of the influence of material and energy flow in the waste paper recycling system to the ecological cost is revealed. Taking the minimum ecological cost of waste paper recycling system as the objective function, the optimal design is based on the constraint condition of economic benefits, manufacturing process conditions, national policy and industrial standards. The results show that the ecological cost is reduced to 1385.69 yuan per ton after optimization, which is down by 456.8 yuan/ton compared with that before optimization, and the decrease is 24.79%. At the same time, the economic benefit is increased to 1326.95 yuan/ton, 13.51% higher than that before the optimization. And it is suggested that the enterprises of waste paper recycling should be intensive development in the future; properly control the price of waste paper, avoid the high price of waste paper. The state should give a moderate economic compensation to waste paper recycling enterprise; it will contribute to the win-win between its economy and ecological environment.