Short-term greenhouse emission lowering effect of biochars from solid organic municipal wastes

Rehrah, Djaafar; Bansode, Rishipal R.; Hassan, Osman; Ahmedna, Mohamed

doi:10.1007/s13762-017-1470-4

Cited by 10 publications

(5 citation statements)

References 26 publications

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“…However, there is a limitation and lack of understanding of the synergistic effects of these parameters on produced biochars. Feedstock with different physical and chemical compositions react differently to operational parameters and produce biochars with variability in characteristics [35]. Material selection is an important step prior to biochar production.…”

Section: Introductionmentioning

confidence: 99%

Design of Experiments Study on Scottish Wood Biochars and Process Parameter Influence on Final Biochar Characteristics

Jamal

Fletcher

2023

Bioenerg. Res.

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Native Scottish wood samples were investigated as potential, locally sourced, raw materials for biochar production. Screening experiments identified pure softwood as the preferable feedstock. Influence of operational parameters, i.e. activating gas flow rate (CO2), heating ramp rate and contact time on final biochar characteristics, was investigated using design of experiments. Surface area and biochar yield were selected as response variables. Minitab was used to define experimental run conditions and suggested an optimal output at 60 min contact time and 15 °C/min ramp rate for maximum responses. The highest surface area (764 m2/g) was achieved at 850 °C from softwood, albeit with a low yield of 15%. Under optimised conditions, the observed surface area was 613 m2/g with ~ 18% yield. Pareto charts suggested no influence of gas flow rate on chosen responses, which correlated well with experimental data. Pore structure was a combination of micro- and mesopores with average pore widths of 3–5 nm and an average point of zero charge of 7.40 ± 0.02. Proximate analysis showed an increase in fixed carbon content from 20%, in the feedstock, to 80%, in the optimised biochar. Morphological analysis showed a layered carbon structure in the biochars. The results show the significance of the selected feedstock as a potential source of biochar material and the relevance of interplay of operational variables in biochar development and their final characteristics.

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Section: Introductionmentioning

confidence: 99%

Design of Experiments Study on Scottish Wood Biochars and Process Parameter Influence on Final Biochar Characteristics

Jamal

Fletcher

2023

Bioenerg. Res.

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“…A modeling-based study found recycling food wastes in Qatar to produce chars using pyrolysis has the potential for water-treatment applications, soil amendments, and carbon sequestration [35]. Another study examined the technology as a sustainable waste management strategy while producing crops and se-questering carbon [36]. Integrating carbon-capturing technologies with biomass-integrated gasification using an energy-food-water (EFW) nexus tool would help secure food security and self-sufficiency (40%) for Qatar [37].…”

Section: Agriculturementioning

confidence: 99%

Waste Management in Qatar: A Systematic Literature Review and Recommendations for System Strengthening

et al. 2022

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Billions of tons of waste are generated annually, with the amount of waste rapidly increasing and its management expected to worsen. Qatar is a small and wealthy country in the Arabian Peninsula that is undergoing enormous economic and urban development. This study presents the results of a systematic literature review on waste management in Qatar and offers recommendations for system strengthening based on an analysis of the available evidence. The PRISMA guidelines were followed to review literature from the ProQuest and SCOPUS platforms, from which 82 unique publications were analyzed according to ten themes. The results draw upon diverse disciplinary and research focus areas related to waste management, ranging from the generation of value-added products from wastes to the role of religion in waste management awareness. The main recommendations emerging from the available evidence include the need for a holistic approach to address increasing waste generation, which must include diverse stakeholders such as government entities, researchers, and broad community representation for decision making as well as raising awareness for behavior change. Additionally, the main waste types, including construction, food, plastic, and electronic wastes, require specific attention since the cause of generation and type of management varies accordingly. The rise of interest in improving waste management, in particular to work toward meeting the targets of the Qatar National Vision and the National Development Strategy should bring about positive outcomes for strengthening waste management systems.

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“…The Qatari government has been making significant moves in recent years to increase the waste recycling rate and reduce domestic solid waste. Production of biochar and compost from biogenous waste are the important issues being addressed by these moves (Rehrah et al, 2018). In 2011, Domestic Solid Waste Management Center (DSWMC) started working in Qatar and is considered the first integrated solid waste management facility in the Middle East.…”

Section: Qatarmentioning

confidence: 99%

A review on waste management and compost production in the Middle East–North Africa region

Hussein¹,

Uren²,

Rekik

et al. 2021

Waste Manag Res

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Over the last two decades, solid waste management in the Middle East–North Africa (MENA) region has been one of the major challenges due to increasing solid waste quantities and poor waste management practices. With the tremendously increasing amounts of organic waste, MENA countries are under great pressure and are facing the threats of acute air pollution, contamination of water bodies and climate change. As a result, these countries are adopting different methods to cope with this rising challenge of waste management, including composting. This review reports on the different MENA countries’ organic waste quantities, disposal methods, organic waste management practices and challenges, along with the potential use and demand of compost, where information is available. The reported data are from 2009 to 2021, with the bulk of the papers being from 2014 and onwards. The total amount of municipal waste collected in the 21 countries ranged from 0.56 million tons in Mauritania to 90 million tons in Egypt, with an average of 16.42 million tons, equivalent to 1.08 kg per capita waste generation per day. Around 55% of this material is biogenous. Many treatments and repurposing methods of this material are adopted in the MENA region, mainly through composting, as it presents one of the most sustainable solutions that lead to immediate climate change mitigation. This article also presents the biotic and abiotic stressors faced by this region, which in turn affect the successful implementation of composting solutions, and proposes some solutions based on different studies conducted.

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Short-term greenhouse emission lowering effect of biochars from solid organic municipal wastes

Cited by 10 publications

References 26 publications

Design of Experiments Study on Scottish Wood Biochars and Process Parameter Influence on Final Biochar Characteristics

Design of Experiments Study on Scottish Wood Biochars and Process Parameter Influence on Final Biochar Characteristics

Waste Management in Qatar: A Systematic Literature Review and Recommendations for System Strengthening

A review on waste management and compost production in the Middle East–North Africa region

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