Environmental Impact Assessment of Mobile Recycling of Demolition Waste in Shenzhen, China

Posted: 23 Jul 2019

See all articles by Jingru Li

Jingru Li

Shenzhen University - College of Civil Engineering

Junlong Liang

Shenzhen University - College of Civil Engineering

Hong Guo

Shenzhen University - College of Civil Engineering

Yun Yao

Shenzhen University - College of Civil Engineering

Jian Zuo

University of Adelaide - School of Architecture and Built Environment

Date Written: July 23, 2019

Abstract

In recent years Shenzhen has witnessed a significant amount of demolition waste as a result of large scale of urban renewal. A notification enacted in early of 2017 required demolition waste to be recycled and encouraged the usage of mobile recycling facility to handle waste on demolition site. The mobile recycling may help reduce environmental impact as it avoids the long distance transportation of demolition waste to stationary recycling plants. This study aims to assess the environmental impact of mobile recycling of demolition waste and estimate the potential environmental benefit of avoiding transportation using the Life Cycle Assessment method (LCA). The studying scope includes waste pretreatment, waste crushing and screening, recycled aggregate transportation and disposal of residue. Four mobile recycling projects were investigated to collect the information about mobile recycling equipments and energy consumption. Accordingly, environmental impact inventory of one ton waste was presented with five types of environmental emissions and occupied land for disposal of residue. The environmental emissions were classified into the five types of environmental impact, i.e. global warming, photochemical smog, eutrophication, and environmental acidification, as well as land occupation. After characterization, the impacts of different pollutants were transformed into a unified characteristic index referring the representative pollutants of each kind of environmental impact. Applying social willingness to pay for each environmental impact category as a weighting factor, the monetization value of each environmental impact category was calculated. By comparing the environmental impact in term of stage and type, the differences of the environmental impact of all projects were discussed. The main reasons causing the differences were explored. Also, the potential environmental benefit of avoiding waste transportation is analyzed. Based on these results, some suggestions on reducing the environmental impact of the recycling process were put forward.

Keywords: demolition waste, mobile recycling, environmental impact, Life cycle assessment (LCA)

Suggested Citation

Li, Jingru and Liang, Junlong and Guo, Hong and Yao, Yun and Zuo, Jian, Environmental Impact Assessment of Mobile Recycling of Demolition Waste in Shenzhen, China (July 23, 2019). Abstract Proceedings of 2019 International Conference on Resource Sustainability - Cities (icRS Cities). Available at SSRN: https://ssrn.com/abstract=3424760

Jingru Li (Contact Author)

Shenzhen University - College of Civil Engineering ( email )

3688 Nanhai Road, Nanshan District
Shenzhen, Guangdong 518060
China

Junlong Liang

Shenzhen University - College of Civil Engineering ( email )

3688 Nanhai Road, Nanshan District
Shenzhen, Guangdong 518060
China

Hong Guo

Shenzhen University - College of Civil Engineering ( email )

3688 Nanhai Road, Nanshan District
Shenzhen, Guangdong 518060
China

Yun Yao

Shenzhen University - College of Civil Engineering ( email )

3688 Nanhai Road, Nanshan District
Shenzhen, Guangdong 518060
China

Jian Zuo

University of Adelaide - School of Architecture and Built Environment ( email )

Level 4 Horace Lamb, North Terrace
The University of Adelaide
5005
Australia

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