PPP在城市园林绿化垃圾再利用项目中的应用

The Application of PPP in Urban Landscaping Waste Recycling Projects

将城市园林绿化垃圾再利用分为传统利用模式和科学利用模式,应用外部性理论分析城市园林绿化垃圾传统利用模式的负外部性问题以及绿化垃圾科学再利用方式对负外部性的矫正机理。基于此,提出将PPP模式应用到城市园林绿化垃圾处理中,减少负外部性产生的同时有效提高社会福利;重点分析PPP应用到城市园林绿化垃圾再利用的运营模式问题,提出PPP应用到城市园林绿化垃圾再利用的过程可以分为3个阶段,归纳总结每一个阶段运营模式的特点,初期阶段为建设-引入-经营模式,中期阶段为移交-合作-扩大经营模式,后期阶段为全方位合作-规模化经营-产业化发展模式。

⑴Background——With the acceleration of urbanization and the in-depth implementation of sustainable development,China s urban landscaping construction has reached an unprecedented level in scale and speed.While the area of urban landscaping continues to expand and the quality continues to improve,the amount of landscaping waste such as pruning,fallen leaves and grass clippings generated in maintenance and management is also increasing.Scientific and effective disposal and utilization of urban landscaping waste and promotion of landscaping waste recycling are of great practical significance for further promoting the comprehensive and effective implementation of garbage classification and the ecological,green and low-carbon development of the cities.⑵Methods——Based on the analysis of the externality of landscaping waste,this paper discusses the ways to reuse landscaping waste using PPP application mode,in order to reduce its negative externality and correct its positive externality.According to the operation cycle,the urban landscaping waste recycling is divided into the early,middle and late stages of the PPP mode.In the process of applying the PPP mode to the disposal of urban landscaping waste,it needs to be gradually integrated into every link of landscaping waste disposal,and finally form an industrial system of urban landscaping waste disposal dominated by the PPP mode and operated by the market mechanism.⑶Results——There are negative externalities in traditional urban landscaping waste disposal.The original negative externalities are modified to positive externalities by changing the disposal methods of urban landscaping waste.The modified method of urban landscaping waste disposal is carried out through PPP mode,and is analyzed and promoted through three stages of the pre-implementation,mid-implementation and post-implementation stages.In this paper,the application of PPP mode to the disposal process of urban landscaping waste is divided into three stages,and the specific operation mode of each stage is designed:In the early stage,it is the construction-introduction-management mode,in which the government is dominant and the role played by enterprises has certain limitations.In the middle stage,it is the transition-cooperation-expansion mode,in which the market gradually improves and capital gradually flows in,enterprises play an increasingly large role,and the dominant position of the government gradually weakens.In the later stage,it is an all-round cooperation-large-scale operation-industrialization development mode,in which the market mechanism is basically perfect,enterprises occupy the dominant position,and the government gradually fades out of the market.Finally,it gradually establishes an industrial system of the urban landscaping waste recycling dominated by the PPP mode,with perfect market-oriented operation mechanism and sound industrial chain.⑷Conclusions and Discussions——The PPP operation mode can not only solve the externalities brought by urban landscaping waste disposal,but also bring economic,social and ecological effects.In order to improve the recycling efficiency of urban landscaping waste and establish a green and low-carbon production mode,this paper puts forward the following policy suggestions:First,stimulate the enthusiasm of the government and enterprises in promoting the deep integration of the PPP mode and the urban landscaping waste recycling industry.Second,improve the contract terms and relevant laws and regulations for the PPP projects of the urban landscaping waste recycling.Third,increase public participation in PPP projects for the urban landscaping waste recycling.