Impact of MSWI Bottom Ash Codisposed with MSW on Landfill Stabilization with Different Operational Modes

Li, Wenbing; Yao, Jun; Malik, Zaffar; Zhou, Gendi; Dong, Ming; Shen, Dongsheng

doi:10.1155/2014/167197

Cited by 8 publications

(3 citation statements)

References 26 publications

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“…In landfills, it is used as a stabilizing layer to protect the geomembrane, intermediate layer and also as the leachate drainage layer [ 109 , 110 ].…”

Section: Utilization Of Mswi Bottom Ash In Building Materialsmentioning

confidence: 99%

The Use of Municipal Solid Waste Incineration Ash in Various Building Materials: A Belgian Point of View

Snellings²,

et al. 2018

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Huge amounts of waste are being generated, and even though the incineration process reduces the mass and volume of waste to a large extent, massive amounts of residues still remain. On average, out of 1.3 billion tons of municipal solid wastes generated per year, around 130 and 2.1 million tons are incinerated in the world and in Belgium, respectively. Around 400 kT of bottom ash residues are generated in Flanders, out of which only 102 kT are utilized here, and the rest is exported or landfilled due to non-conformity to environmental regulations. Landfilling makes the valuable resources in the residues unavailable and results in more primary raw materials being used, increasing mining and related hazards. Identifying and employing the right pre-treatment technique for the highest value application is the key to attaining a circular economy. We reviewed the present pre-treatment and utilization scenarios in Belgium, and the advancements in research around the world for realization of maximum utilization are reported in this paper. Uses of the material in the cement industry as a binder and cement raw meal replacement are identified as possible effective utilization options for large quantities of bottom ash. Pre-treatment techniques that could facilitate this use are also discussed. With all the research evidence available, there is now a need for combined efforts from incineration and the cement industry for technical and economic optimization of the process flow.

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“…In landfills, it is used as a stabilizing layer to protect the geomembrane, intermediate layer and also as the leachate drainage layer [ 109 , 110 ].…”

Section: Utilization Of Mswi Bottom Ash In Building Materialsmentioning

confidence: 99%

The Use of Municipal Solid Waste Incineration Ash in Various Building Materials: A Belgian Point of View

Snellings²,

et al. 2018

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“…When elements such as calcium (Ca), silicon (Si), magnesium (Mg), iron (Fe), aluminum (Al), and sodium (Na), which are the dominant elements in MSWIBA, are co-disposed in a MSW landfill, the risk that alkali and alkali earth metals (especially Ca) will leach intensifies (Li et al 2014;Lo and Liao 2007). Previous research has shown that at a low liquid-to-solid ratio, the leaching concentration of Ca may be as high as 5000-6000 mg/L and increases as conditions within the landfill become more acidic (Meima and Comans 1997).…”

Section: Introductionmentioning

confidence: 99%

Inhibition effects of high calcium concentration on anaerobic biological treatment of MSW leachate

et al. 2016

Environ Sci Pollut Res

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With the increasing use of municipal solid waste incineration (MSWI) and more stringent limits on landfilling of organic waste, more MSWI bottom ash is being landfilled, and the proportion of inorganic wastes in landfills is increasing, causing the increased Ca concentrations in landfill leachate. In this research, the inhibition effect of Ca concentration on the anaerobic treatment of landfill leachate was studied using a biochemical methane potential experiment. Slight inhibition of methane production occurred when the addition of Ca concentration was less than 2000 mg/L. When the addition of Ca concentration was between 6000 and 8000 mg/L, methane production was significantly reduced (to 29.4-34.8 % of that produced by the BLK reactor), and the lag phase was increased from 8.55 to 16.32 d. Moreover, when the dosage of Ca concentration increased from zero to 8000 mg/L, reductions in solution Ca concentration increased from 929 to 2611 mg/L, and the proportion of Ca in the residual sludge increased from 22.58 to 46.87 %. Based on the results, when the dosage of Ca concentration was less than 4000 mg/L, the formation of Ca precipitates on the surface of sludge appeared to prevent mass transfer and was the dominant reason for the reduction in methane production and sludge biomass. At higher Ca concentrations (6000-8000 mg/L), the severe inhibition of methane production appeared to be caused by the toxic effect of highly concentrated Ca on sludge as well as mass transfer blockage.

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“…Throughout the four scenarios, improvement in the collection of MSW would be aimed at as it would eliminate scattered waste disposal. Establishment of sanitary landfills are of paramount importance regardless of implementation of recycling or incineration (Agamuthu, 2013) or combination of both approaches as there would be some material that could not be recycled (Kral et al, 2018;Turner et al, 2015;Zuberi et al, 2015) or for bottom ash from incineration that would require proper disposal (He et al, 2017;Li et al, 2014). The informal sector already plays a significant role in the recycling of MSW in Pakistan -their incorporation in the waste management hierarchy is often suggested in the literature (Masood and Barlow, 2013).…”

Section: Swm-ghg Calculatormentioning

confidence: 99%

Strategies for reducing greenhouse gas emissions from municipal solid waste management in Pakistan

et al. 2021

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The studies on municipal solid waste (MSW) management in Pakistan and its impacts on greenhouse gas (GHG) emissions are glaringly missing. Therefore, this study examines the effect of MSW management on GHG emissions in Pakistan and suggests the best suitable strategies for alleviating GHG emissions. The Intergovernmental Panel on Climate Change (IPCC) 2006 waste model (WM) was used to create inventory of GHG emissions from landfilling. The solid waste management GHG (SWM-GHG) calculator and strengths–weaknesses–opportunities–threat (SWOT) analyses were used as strategic planning tools to reduce GHG emissions by improving MSW management in Pakistan. The IPCC 2006 WM estimated 14,987,113 metric tonnes (Mt) carbon dioxide equivalents (CO2-eq) of GHG emissions in 2016. The SWM-GHG calculator, on the other hand, estimated 23,319,370 Mt CO2-eq of GHG emissions from management of 30,764,000 Mt of MSW in 2016, which included 8% recycling, 2% composting, and 90% disposal in open dumps. To reduce GHG emissions, two strategies including recycling-focused and incineration-focused were analysed. The recycling approach can reduce more GHG emissions than incineration, as it can reduce 36% of GHG emissions (as compared to GHG emission in 2016) by recycling 23% of MSW, anaerobically digesting 10% of MSW, and disposing of 67% of MSW in sanitary landfills (with energy recovery). Moreover, the SWOT analysis suggested integration of the informal sector, adoption of anaerobic digestion and formulation of explicit MSW regulations for improving the current management of MSW which will also result in lower GHG emissions.

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Impact of MSWI Bottom Ash Codisposed with MSW on Landfill Stabilization with Different Operational Modes

Cited by 8 publications

References 26 publications

The Use of Municipal Solid Waste Incineration Ash in Various Building Materials: A Belgian Point of View

The Use of Municipal Solid Waste Incineration Ash in Various Building Materials: A Belgian Point of View

Inhibition effects of high calcium concentration on anaerobic biological treatment of MSW leachate

Strategies for reducing greenhouse gas emissions from municipal solid waste management in Pakistan

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