CAJ | 학술논문

废弃物循环利用的适度水平是构建循环经济的一个重要问题。以废纸的再利用为例，在界定废纸循环利用的社会效益与社会成本的基础上，综合运用生命周期分析方法与环境影响经济评估方法识别并货币化度量废纸循环利用的边际社会效益，构建了我国废纸循环利用的边际成本函数，进而分析我国废纸循环利用的适度水平。研究结果表明，2008年我国用废纸替代木材生产1吨纸浆的社会效益为14037元，社会福利最大化下的废纸循环利用适度水平为60．1％，高于同期国内废纸循环利用的实际水平39．5％，适当提高现阶段我国废纸循环利用的水平可以增加整个社会的福利。
폐기물순배이용적괄도수평시구건순배경제적일개중요문제。이폐지적재이용위례，재계정폐지순배이용적사회효익여사회성본적기출상，종합운용생명주기분석방법여배경영향경제평고방법식별병화폐화도량폐지순배이용적변제사회효익，구건료아국폐지순배이용적변제성본함수，진이분석아국폐지순배이용적괄도수평。연구결과표명，2008년아국용폐지체대목재생산1둔지장적사회효익위14037원，사회복리최대화하적폐지순배이용괄도수평위60．1％，고우동기국내폐지순배이용적실제수평39．5％，괄당제고현계단아국폐지순배이용적수평가이증가정개사회적복리。
It is very necessary to study the optimal level of waste recycling for building the circular economy. The paper concentrated its energies on providing a careful analysis of the optimal level of paper recycling. After the boundaries of paper recycling system and its contrastive system were identified, the marginal social benefit of paper recycling in China （in 2008） was quantitatively analyzed by using LCA and the methods of economics assessment of environmental impact. Further, the marginal social cost function of paper recycling in China was simulated and the optimal level of paper recycling was analyzed. According to the results, the marginal social benefit of paper recycling to produce 1 t pulp by 1.25 t waste paper is 14 037 Yuan in 2008. From the perspective of the whole society, the optimal level of paper recycling should be 60. 1% in China, higher than the actual level, which is 39.5%. Therefore, improving the current level of paper recycling properly could increase the welfare of the whole society.