scholarly journals Multiobjective Location Model Design Based on Government Subsidy in the Recycling of CDW

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Peihua Fu ◽  
Hongxuan Li ◽  
Xiaohua Wang ◽  
Juanjuan Luo ◽  
Sha-lei Zhan ◽  
...  
Keyword(s):  
Reverse Logistics ◽  
Pareto Frontier ◽  
Construction And Demolition Waste ◽  
Recycling Rate ◽  
Government Subsidy ◽  
Integer Programming Problem ◽  
Demolition Waste ◽  
Logistics Network ◽  
The Government ◽  
Role Of The Government

With the generation of a large amount of construction and demolition waste (CDW), many scholars have recently paid more attention to the recycling of CDW. In this paper, we design a classification recycling method based on the degree of CDW availability in the recycling of CDW. Considering the important role of the government in reverse logistics, a model of reverse logistics network based on the trade-off between cost and recycling rate is put forward, which is subject to government subsidy. The model includes the location of classification processing center and ensures the best route of transportation. Then, the improved particle swarm optimization algorithm is applied to solve the model to get Pareto frontier by transforming it into a multiobjective integer-programming problem. As a case study, the results of the statistical modeling used in this study indicate the feasibility of the model. Finally, according to the sensitivity analysis of government’s subsidy, we evaluate the effectiveness of this program and its applicability.

Minimisation and management strategies for refurbishment and renovation waste in Hong Kong

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ann T.W. Yu ◽  
Kelvin S.H. Mok ◽  
Irene Wong
Keyword(s):  
Hong Kong ◽  
Data Collection ◽  
Management Strategies ◽  
Government Support ◽  
Construction And Demolition Waste ◽  
Snowball Sampling ◽  
Structured Interviews ◽  
Demolition Waste ◽  
Content Type ◽  
The Government

PurposeThe capacity of landfills will reach saturation in the 2020s. There are more than 50,000 buildings in Hong Kong over 30 years old and which may require extensive refurbishment under the Mandatory Building Scheme. Additionally, most new owners/tenants tend to renovate their premises before moving in. Hence, there is an urgent need in Hong Kong, to explore strategies and measures to enable the development of effective refurbishment and renovation (R&R) waste management for such projects. The objectives of this paper are to investigate the process of R&R for identifying the perceived barriers and thereby the strategies for minimisation and management of R&R waste in Hong Kong.Design/methodology/approachDesktop study, semi-structured interviews, site observations and document reviews were used as the data collection methods to achieve the objectives of this research. Considering the nature and characteristics of the industry structure, the snowball sampling process was deployed for data collection. Thematic analysis and content analysis were used for data analysis. Waste minimisation and management strategies for R&R projects were then discussed and developed by the research team and a focus group meeting was held to validate the research findings. Six strategies were then proposed to the government.FindingsR&R projects contribute 10–20% of the construction and demolition waste. The barriers to recycling of R&R waste can be grouped into six major categories: (1) lack of sorting and storage spaces, (2) high cost, (3) insufficient government supporting policy, (4) complicated recycling processes, (5) immature recycling market and (6) insufficient public education. Also, six strategies are proposed in this study, which include (1) pre-refurbishment audit, (2) development of recycling market, (3) sea reclamation, (4) incineration, (5) government support and (6) education and research.Originality/valueThe strategies and measures proposed in this research could most adequately serve as reference for the government officials, building professionals and academic researchers. Such knowledge would make possible the development of effective strategies and measures for minimising and managing R&R waste.

scholarly journals Dynamic Incentive Mechanism Design for Recycling Construction and Demolition Waste under Dual Information Asymmetry

2019 ◽  
Vol 11 (10) ◽  
pp. 2943 ◽  
Author(s):  
Qidan Hu ◽  
Ying Peng ◽  
Chunxiang Guo ◽  
Dong Cai ◽  
Peiyang Su
Keyword(s):  
Information Asymmetry ◽  
Construction And Demolition Waste ◽  
High Tech ◽  
Demolition Waste ◽  
Incentive Theory ◽  
The Government ◽  
Dynamic Cooperation ◽  
Technology Level ◽  
Incentive Mechanism Design

The generation of construction and demolition waste (CDW) is a problem for societies aspiring to sustainability. In this regard, governments have the responsibility to support the CDW recycling through subsidies. However, the information asymmetry, as well as the “dynamic nature” of the CDW recycling market, results in a number of barriers for the government to promote CDW recycling. In this paper, we establish a mathematical model that includes the government and the recycling enterprise in the presence of dual information asymmetry including the unknown recycling technology level and unobservable recycling efforts in one-stage and two-stage cooperation. Using the incentive theory, the static and dynamic optimal recycling incentive contracts of the government were designed, and the optimal decisions of the recycler were identified. A numerical simulation revealed that by designing reasonable contracts, the government can encourage the recycler to report the true technical level and achieve information screening. Furthermore, the subsidy of the high-tech recycler remained unchanged under different circumstances. However, the subsidy of the low-tech recycler was closely related to the probability of misreporting and the proportion of technology types. This finding suggests that the government and recycler are inclined towards long-term dynamic cooperation.

Environmental and economic advantages of adopting reverse logistics for recycling construction and demolition waste: A case study of Brazilian construction and recycling companies

2019 ◽  
Vol 37 (2) ◽  
pp. 176-185 ◽  
Author(s):  
Geraldo C Oliveira Neto ◽  
José MF Correia
Keyword(s):  
Environmental Impact ◽  
Solid Waste ◽  
Reverse Logistics ◽  
Waste Treatment ◽  
Economic Assessment ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Construction Companies ◽  
Solid Waste Treatment

The aim of this study was to assess the economic and environmental advantages of implementing reverse logistics to recycle solid waste from construction companies. The adopted research method was based on a systematic literature review and two case studies. For the economic assessment, the return on investment, the internal rate of return, and the discounted payback factors were considered, while the material intensity factor was used for the environmental impact assessment. This study shows that there are economic and environmental advantages associated with the use of reverse logistics for solid waste treatment and recycling. In 2016, the purchase of recycled blocks resulted in a profit of over US$45,000 for one company, and another company earned almost US$250,000 in the same year by recycling solid waste from manufacturing blocks and selling iron, wood, paper, and plastics. Furthermore, the environmental impact was reduced. This paper contributes to the dissemination of knowledge regarding the advantages of adopting reverse logistics for recycling construction and demolition waste, and creates new opportunities for companies.

scholarly journals Incentive or Punitive Measure? Analysis of Environmental Regulations in Construction and Demolition Waste Recycling

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Jingsong Yang ◽  
Jing Zhang ◽  
Chunxiang Guo ◽  
Ruwen Tan ◽  
Minjiu Yu
Keyword(s):  
Decision Making ◽  
Social Welfare ◽  
Environmental Regulations ◽  
Waste Recycling ◽  
Incentive Regulation ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Decision Making System ◽  
Measure Analysis ◽  
The Government

In order to investigate the formulation of appropriate environmental regulations in construction and demolition waste (CDW) recycling, this paper establishes a CDW recycling decision-making system consisting of a contractor, a developer, and the government and analyses the decision-making results and influencing factors of the various stakeholders. Three different types of environmental regulations have been considered in the model: (i) no regulation, (ii) incentive regulation, and (iii) punitive regulation. The research shows that the incentive regulation offers the constructor greater incentives to recycle CDW and yields higher profits for members of the system, and however, when recycling is very costly and CDW is highly damaging, punitive regulation should be implemented, as the incentive regulation leads to lower social welfare. In addition, governments should be more cautious when adopting incentive regulation, because social welfare may be negative under this condition whereas there is no such possibility under the punitive regulation.

scholarly journals Subsidy and Environmental Tax for Construction and Demolition Waste Recycling

2021 ◽  
Author(s):  
Chunxiang HUA ◽  
Chenyu LIU ◽  
Jianguo Chen ◽  
Chenxi YANG ◽  
Linyan CHEN
Keyword(s):  
Industrial Development ◽  
Waste Recycling ◽  
Construction And Demolition Waste ◽  
Recycling Rate ◽  
Environmental Tax ◽  
Combination Strategy ◽  
Demolition Waste ◽  
Subsidy Policy ◽  
Recycling Industry ◽  
Incentive Policies

Abstract In recent two decades, construction and demolition (C&D) waste is becoming a major source for municipal waste which causes serious damage to the environment. To solve the problem, waste recycling measures are gradually used to turn waste into treasures. Meanwhile, several kinds of policies such as waste disposal charging fees have been issued to stimulate stakeholders’ behavior to take waste recycling measures to promote the C&D waste recycling industry. However, the C&D waste recycling rate is still too low in China. In order to promote C&D waste recycling industrial development, this paper is aiming at introducing subsidy and environmental tax policies to promote C&D waste recycling. Based on system dynamics, this study establishes a model to determine the proper subsidy and environmental tax range. According to the simulation results, three kinds of incentive policies are obtained, namely, single subsidy policy, single environmental tax and combined incentive policies. Optimal single subsidy and environmental tax are in the interval [10, 30] and [20, 60], respectively. The best combination strategy is subsidy=10 yuan /ton and environmental tax=20 yuan/ton. The results from this paper could be a foundation for government to establish incentive policies to promote C&D waste recycling.

scholarly journals Complete Real-Scale Application of Recycled Aggregates in a Port Loading Platform in Huelva, Spain

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2651
Author(s):  
Francisco Agrela ◽  
Francisco González-Gallardo ◽  
Julia Rosales ◽  
Javier Tavira ◽  
Jesús Ayuso ◽  
...  
Keyword(s):  
Civil Engineering ◽  
Recycled Concrete ◽  
Environmental Benefits ◽  
Construction And Demolition Waste ◽  
Recycled Aggregates ◽  
Base Layer ◽  
Recycling Rate ◽  
Demolition Waste ◽  
Technical Requirements ◽  
Real Scale

The application of recycled aggregates (RA) from construction and demolition waste and crushed concrete blocks is a very important challenge for the coming years from the environmental point of view, in order to reduce the exploitation of natural resources. In Spain, the use of these recycled materials in the construction of road bases and sub-bases is growing significantly. However, presently, there are few studies focused on the properties and behavior of RA in civil works such as road sections or seaport platforms. In this work, two types of RA were studied and used in a complete real-scale application. Firstly, recycled concrete aggregates (RCA) were applied in the granular base layer under bituminous superficial layers, and secondly mixed recycled aggregates (MRA) which contain a mix of ceramic, asphalt, and concrete particles were applied in the granular subbase layer, under the base layer made with RCA. Both RA were applied in a port loading platform in Huelva, applying a 100% recycling rate. This civil engineering work complied with the technical requirements of the current Spanish legislation required for the use of conventional aggregates. The environmental benefits of this work have been very relevant, and it should encourage the application of MRA and RCA in civil engineering works such as port platforms in a much more extended way. This is the first and documented real-scale application of RA to completely build the base and sub-base of a platform in the Huelva Port, Spain, replacing 100% of natural aggregates with recycled ones.

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