Abstract
A new environmental ban has forced the restructure of open dumps in China since 1 July 2011. A technical process was established in this study that is feasible for the upgrade of open dumps through restructuring. The feasibility of restructuring and the benefit of greenhouse gas emission reductions were assessed according to field surveys of five landfills and four dumps in Nanjing. The results showed that the daily processing capacities of the existing landfills have been unable to meet the growth of municipal solid waste (MSW), making restructuring of the landfills imperative. According to an assessment of the technical process, only four sites in Nanjing were suitable for upgrading. Restructuring the Jiaozishan landfill effectively reduced the leachate generation rate by 5.84% under its scale when expanded by 60.7% in 2015. CO2 emissions were reduced by approximately 55,000–86,000 tons per year, in which biogas power generation replaced fossil fuels Fossil fuels accounted for the largest proportion, up to 45,000–60,000 tons. Photovoltaic power generation on the overlying land has not only reduced CO2 emissions to 26,000–30,000 tons per year but has also brought in continuing income from the sale of electricity. The funds are essential for developing countries such as China, which lack long-term financial support for landfill management after closure.
Highlights
With increasing urbanization and economic development, municipal solid wastes (MSW) have increased on a large scale in recent years
Greenhouse gas (GHG) emission categories of the landfill can be divided into seven parts including CO2 emissions from waste collection and transportation, CO2 emissions from landfill management, CO2 emissions from leachate treatment, GHG emissions due to fugitive CH4, saved CO2 emissions as a substitute for electricity production, saved CO2 emissions as carbon sequestered in the landfill body, and other GHG emissions such as NO2 and CO emissions [35]
The CO2 emission reduction effect was caused by the reduced leachate after closing open dumps and the transformation of regular landfill using the separation of rainwater and sewage method, resulting in a decrease in energy consumption by the pollution treatment
Summary
With increasing urbanization and economic development, municipal solid wastes (MSW) have increased on a large scale in recent years. A large amount of MSW has been dumped in the areas surrounding cities, and the phenomenon of “garbage siege” is common in developing countries such as China [5,6,7]. Municipal garbage collectors habitually throw MSW into urban fringe areas, and these wastes gradually accumulate [8]. Some small and medium-sized cities in developing countries lack sufficient financial resources. These limited financial resources must be preferentially used for the construction of the city’s most basic infrastructure and public facilities such as transportation, electricity, water supply, and so on [10]. The phenomenon of garbage siege has gradually appeared in the surrounding cities
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
