Leachate leakage investigation, assessment and engineering countermeasures for tunneling underneath a MSW landfill

Feng, Shi-Jin; Zhao, Yong; Zhang, Xiaolei; Bai, Zhen-Bai

doi:10.1016/j.enggeo.2019.105447

Cited by 40 publications

(16 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Despite UN Sustainable Development Goals clearly stated a call for environmentally sound disposal facilities, the management of the existing land ll sites still poses many challenges. Even though modern land lls for urban solid waste are designed to minimize environmental impacts (Feng et al 2020) when they are improperly built (i.e., without engineered liners and/or leachate collection/puri cation systems) or poorly managed, the risks of underground leachate in ltration increase consequently (Feng et al 2020; Kjeldsen et al 2002;Negi et al 2020). Considering the general characteristics of municipal land ll wastes, the land ll leachate may be de ned as a water-based solution with high content of dissolved organic matter, inorganic macro-components, heavy metals and xenobiotic organic compounds (Christensen et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Microbial, chemical and isotopic monitoring integrated approach to assess potential leachate contamination of groundwater in a landfill district in Apulia region (Italy).

Beneduce

Piergiacomo

Limoni

et al. 2022

Preprint

View full text Add to dashboard Cite

Landfill sites are a major concern for soil and groundwater pollution in the disposal area. The impact of accidental spill of leachate through the soil and consequential contamination of the groundwater can seriously threaten human health and the environment. Given the impact of other anthropic activities (i.e., agriculture, cattle farming etc.) coexisting in the same site, the perturbation of groundwater environment may be due my multiple factors. Therefore, it is a challenging issue to correctly establish the pollution source of an aquifer where landfill is not isolated from other anthropic land uses. The present study aimed to realize an integrated environmental monitoring that included microbiological and chemical methods to evaluate potential groundwater pollution in a landfill district in the south of Italy. Conventional (microbial plate count, physical-chemical analyses) and advanced methods (PCR-ARISA, isotope analysis) were included in the study, to characterize both the groundwater aquifer in nine sites surrounding the landfill district and the leachate of the active landfills. By the integration of the acquired data, it was possible to reconstruct the scenario by which agriculture and other human activities, together with seawater intrusion in the karst aquifer, were the main drivers of altered groundwater features in the monitored site. It was possible to exclude any contribution of the landfill leachate to the groundwater environment perturbations.

show abstract

Section: Introductionmentioning

confidence: 99%

Microbial, chemical and isotopic monitoring integrated approach to assess potential leachate contamination of groundwater in a landfill district in Apulia region (Italy).

Beneduce

Piergiacomo

Limoni

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…An investigation into new concepts regarding the infiltration rates and fluid transport in natural bentonite-rich expansive clays used in engineered landfill systems have received considerable attention in recent studies [11][12][13]. However, not many research studies have considered the water retention properties of bentonite and/or kaolinite materials in terms of the relationship between pore water in the soil and suction for application in engineered barriers [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Physical-Mechanical Characteristics of Treated Kaolin-Bentonite Mixture for Application in Compacted Liner Systems

et al. 2021

View full text Add to dashboard Cite

Treated bentonite-rich soils used as liner materials in landfills may provide an effective solution to the problems of increased void ratios upon swelling at reduced suction as well as desiccation cracking when suction is increased during desaturation. Accordingly, this study provides an understanding of the evolution of void ratio of the mixed materials during swelling at three different suction levels upon saturation as well as the soil water retention (SWR) during desaturation. For the treatment process, low quantity of cement binder whose production leverages raw material resources with efficient dry-process kilns and the benefit of lower energy consumption were used. Results indicated increased mixed soils’ strength irrespective of increased fines content due to thixotropy. The mixed soils exhibited almost equal values of void ratios at different hydration stages, suggesting that slightly reduced expansion mostly affects the subsequent phases of moisture ingress at full saturation compared to the natural soils. Lower values of void ratio obtained at full saturation also suggests possible reduced infiltration of water into landfills. The observed increased moisture retention within the osmotic suction zone and a decrease in the same as the fines content increased in the mixed soils can aid contaminant encapsulation while also reducing desiccation cracking. The findings of this research are intended to serve as a benchmark for further studies using other sustainable materials for treatment of mixed soils.

show abstract

“…Today, around 70% of the world's waste ends up in dumps and landfills [2]. Nevertheless, dumps, which are a large-scale waste storage without any technical management, have also become a major source of waste pollution, while lower environmental concerns are caused by landfills, as they include varying degrees of technical measures aiming to reduce the amount of leachate and gases produced [3]. A global snapshot of solid waste management to 2050 illustrates that SWMS issues concerns not only developing countries, but also some developed ones [4].…”

Section: Introductionmentioning

confidence: 99%

Potential of Sustainable Concept for Handling Organic Waste in Tunisia

et al. 2020

View full text Add to dashboard Cite

Nowadays, Tunisia is seeking to implement cost-efficient and sustainable solutions in relation to the treatment of organic waste which, at up to 65%, makes up the largest proportion of total waste generated in the country. Therefore, an efficient tool for decision makers is needed to provide a clear approach about the potential of organic waste as well as the treatment concept, which can be adapted based on technical requirements and local conditions. Results revealed that there is a high variation in terms of the nature of the collected biowaste, which affects the selection of the adopted bioprocess for each geographical zone of the study area. Three main categories of biowaste are produced along the coastline of Tunisia: food waste (FW) (102.543 t/a); green waste (GW) (1.326.930 t/a); and cattle manure (CM) (1.548.350 t/a). Based on the results of similar projects and laboratory-scale research work, anaerobic and aerobic digestion were examined. Regarding aerobic digestion, the monitoring of several physicochemical parameters ascertained that the co-composting of FW and GW at different ratios (GW: FW = 100:0, 75:25, 50:50, and 25:75) allowed the production of a stable and mature compost. A highly qualified end-product was generated from each trial categorized as a finished compost of class V with reference to German Standards of compost. Regarding the anaerobic process, different feedstock mixtures (FW:CM = 0:1, 1:1, 2:1, and 3:1) were prepared to feed semi-continuous anaerobic reactors. However, a significant improvement in the process development was recorded for digesters including a higher fraction of FW, which produced 0.846 LN/kg VSin as the maximum biogas production. Therefore, biological treatments of food waste and different co-substrates seems to be a suitable technique for Tunisia in terms of waste management, environmental, and energy aspects. However, the evaluation of the efficiency of the proposed biological treatments was also verified by a draw-up of a technical and economic feasibility analysis. Although the cost–benefit estimations proved that the profits from both the compost and biogas plants would be very modest, the feasibility of such sustainable projects should not only be evaluated on an economic basis, but also by taking into account socio-environmental considerations including decreasing environmental threats, providing work opportunities, increasing incomes, stimulating public awareness as well as reducing the operating costs linked to landfilling.

show abstract

Leachate leakage investigation, assessment and engineering countermeasures for tunneling underneath a MSW landfill

Cited by 40 publications

References 33 publications

Microbial, chemical and isotopic monitoring integrated approach to assess potential leachate contamination of groundwater in a landfill district in Apulia region (Italy).

Microbial, chemical and isotopic monitoring integrated approach to assess potential leachate contamination of groundwater in a landfill district in Apulia region (Italy).

Microstructure and Physical-Mechanical Characteristics of Treated Kaolin-Bentonite Mixture for Application in Compacted Liner Systems

Potential of Sustainable Concept for Handling Organic Waste in Tunisia

Contact Info

Product

Resources

About