Biomass residue to carbon dioxide removal: quantifying the global impact of biochar

Biochar, Journal Year: 2023, Volume and Issue: 5(1)

Published: Oct. 11, 2023

Abstract The Climate Change Conference of Parties (COP) 21 in December 2015 established Nationally Determined Contributions toward reduction greenhouse gas emissions. In the years since COP21, it has become increasingly evident that carbon dioxide removal (CDR) technologies must be deployed immediately to stabilize concentration atmospheric gases and avoid major climate change impacts. Biochar is a carbon-rich material formed by high-temperature conversion biomass under reduced oxygen conditions, its production one few CDR methods can at scale large enough counteract effects within next decade. Here we provide generalized framework for quantifying potential contribution biochar make achieving national emissions goals, assuming use only sustainably supplied biomass, i.e., residues from existing agricultural, livestock, forestry wastewater treatment operations. Our results illustrate significant role play world-wide strategies, with 6.23 ± 0.24% total GHG 155 countries covered based on 2020 data over 100-year timeframe, more than 10% 28 countries. Concentrated regions high relative were identified South America, northwestern Africa eastern Europe. Graphical abstract

Language: Английский

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Sludge-based biochar preparation: pyrolysis and co-pyrolysis methods, improvements, and environmental applications

Fuel, Journal Year: 2024, Volume and Issue: 373, P. 132265 - 132265

Published: June 28, 2024

The pyrolysis of sewage sludge to produce biochar is a promising method for end-treatment. Key parameters influencing properties include temperature, heat transfer rate, residence time, additives, and raw material types. Sludge-based (SBC) features porous structure, aromatic compound composition, high absorbency, stable chemical properties, large specific surface area, numerous functional groups, making it suitable environmental applications such as soil remediation water quality improvement. However, SBC alone can pose risk due excessive heavy metal content. Co-pyrolysis biomass with has been shown mitigate this by fixing metals reducing their accumulation in biochar. Research indicates that co-pyrolysis produces superior including larger better pore more greater pollutant adsorption capacity compared alone. Thus, sludge-biomass significant potential overcome the limitations single sludge-based biochar, facilitating large-scale production application management.

Language: Английский

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Changes in phosphorus due to pyrolysis and in the soil-plant system amended with sewage sludge biochar compared to conventional P fertilizers: A global meta-analysis

Chemosphere, Journal Year: 2025, Volume and Issue: 371, P. 144055 - 144055

Published: Jan. 4, 2025

Language: Английский

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Advances in sewage sludge application and treatment: Process integration of plasma pyrolysis and anaerobic digestion with the resource recovery

Heliyon, Journal Year: 2023, Volume and Issue: 9(9), P. e19765 - e19765

Published: Sept. 1, 2023

Sewage sludge (SS) is an environmental issue due to its high organic content and ability release hazardous substances. Most of the treatments available are biological, thermal hydrolysis, mechanical (ultrasound, pressure, lysis), chemical with oxidation (mainly ozonation), alkali pre-treatments. Other treatment methods include landfill, wet oxidation, composting, drying, stabilization, incineration, pyrolysis, carbonization, liquefaction, gasification, torrefaction. Some these SS disposal damage ecosystem underutilize potential resource value SS. These challenges must be overcome innovative technique for improvement SS's nutritional value, energy content, usability. This review proposes plasma pyrolysis anaerobic digestion (AD) as promising technologies. Plasma pre-treats make it digestible by AD bacteria immobilizes heavy metals. The addition Char upstream process increases quantity quality biogas produced while enhancing nutrients in digestate. two processes integrated at temperatures, thus creating concerns about their demand. offset generated that can run plant or sold grid, generating additional cash. wastes also converted into biochar, fertilizer, soil conditioner. combined technologies' financial sustainability depends on facility's circumstances location. treat sustainably provide resources. paper explains co-process route's techno-economic prospects, challenges, recommendations future application valorization recovery.

Language: Английский

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Opportunities and challenges in the anaerobic co-digestion of municipal sewage sludge and fruit and vegetable wastes: A review

Energy Nexus, Journal Year: 2023, Volume and Issue: 10, P. 100202 - 100202

Published: May 8, 2023

To overcome the anthropogenic impacts resulting from constant growth of world population, industries like wastewater treatment plants and food processing must be adapted to follow this tendency suppress associated challenges needs arising global situation. In context circular economy, optimising biogas produced in anaerobic digesters during sludge stabilisation is fundamental ensure energy self-sufficiency plants. The co-digestion two or more substrates a viable option drawbacks mono-digestion improve methane production. Considering economic viability digestion system, it major importance address potential spare capacity existing reactors by incorporating readily biodegradable wastes. This review compiles works published between 2015 2023 regarding municipal sewage with fruit vegetable wastes, presenting critical analysis gaps future perspectives on topic. results demonstrated effectiveness correct imbalances mono-digestion, some works, wastes obtained higher yields than sludge. For instance, increment production varied around 4 up 500% when comparing trials. studies, was 13 94% trials only Multi-stage systems enhanced due improvement early stages process, namely hydrolysis which usually limiting phase. A significant number experimental (9 out 20 studies) were performed batch easy operation maintenance, revealing gap studies other types continuous stirred tank reactor, most used reduced articles within scope (20) demonstrates that there still knowledge fill gaps, aiming increase energetic

Language: Английский

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Hydrothermal liquefaction potential of wastewater treatment sludges: Effect of wastewater treatment plant and sludge nature on products distribution

Fuel, Journal Year: 2023, Volume and Issue: 355, P. 129525 - 129525

Published: Aug. 18, 2023

The rapid growth of urban populations necessitates the development more efficient and environmentally sustainable methods for waste treatment resource recovery. Hydrothermal liquefaction (HTL) has emerged as a promising technology converting organic into bio-crude oil. In this study, HTL products various fractions (Fat, oil, grease (FOG), food waste, primary secondary sludge, digestate) produced or handled by four wastewater plants in Denmark were analysed. Additionally, effect mixing was investigated. experiments conducted at temperatures 300, 325, 350 °C, with residence time 20 min dry matter content 16.7%. highest yields obtained temperature 325 °C all feedstocks except FOG (300 °C). wastes resulted positive synergistic effect, presenting an energy recovery between 62 76% higher than expected due to interactions feedstock's biochemical composition. Based on composition fraction, two models are proposed prediction yields, error 4 5% absolute terms. addition, important process water parameters, well nutrient heavy metal load solid residues analysed discussed, giving comprehensive overview potential different plant sludges.

Language: Английский

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Co-hydrothermal carbonization of pine residual sawdust and non-dewatered sewage sludge – effect of reaction conditions on hydrochar characteristics

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 340, P. 117994 - 117994

Published: April 27, 2023

Language: Английский

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Evolution and Prospects of Hydrothermal Carbonization

Energies, Journal Year: 2023, Volume and Issue: 16(7), P. 3125 - 3125

Published: March 29, 2023

Hydrothermal carbonization enables the valorization of biomass via thermochemical conversion into various products. Today, this technology is experiencing a situation similar to that experienced in past by other process technologies. Of these technologies, some have become important industrial realities, such as reverse osmosis, while others never been able establish themselves fully. This paper presents brief overview technology’s current status, highlighting its strengths and drawbacks. The primary purpose research activity identify possible future scenario toward which heading. has already established on laboratory scale for time, now it transitional phase between pilot-scale industrial-scale applications. interest HTC aroused continues arouse evidenced growing number publications patents published. In particular, uniform percentage filed countries testifies worldwide interest. advantages but also bottlenecks yet be overcome. Process integration, higher-capacity plants, use Industry 4.0 technologies seem most interesting options overcome last limiting factors make hydrothermal an reality.

Language: Английский

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HYDROTHERMAL CARBONIZATION – A CRITICAL OVERVIEW OF ITS ENVIRONMENTAL AND ECONOMIC SUSTAINABILITY

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 144838 - 144838

Published: Jan. 1, 2025

Language: Английский

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Feasibility of Biochar Derived from Sewage Sludge to Promote Sustainable Agriculture and Mitigate GHG Emissions—A Review

International Journal of Environmental Research and Public Health, Journal Year: 2022, Volume and Issue: 19(19), P. 12983 - 12983

Published: Oct. 10, 2022

Sewage sludge (SS) has been connected to a variety of global environmental problems. Assessing the risk various disposal techniques can be quite useful in recommending appropriate management. The preparation sewage biochar (SSB) and its impacts on soil characteristics, plant health, nutrient leaching, greenhouse gas emissions (GHGs) are critically reviewed this study. Comparing features SSB obtained at pyrolysis temperatures revealed changes elemental content. Lower hydrogen/carbon ratios generated higher point existence more aromatic carbon molecules. Additionally, an increased ash content, lower yield, surface area as result rise temperature. worldwide potential SS output CO2-equivalent 2050 were predicted factors population common management order create futuristic strategy cope with quantity abundant SS. According estimations, associated CO2-eq around 115 million tons dry solid (Mt DS) 14,139 teragrams (Tg), respectively, 2020. This will about 138 Mt DS 16985 Tg 2050, 20% increase. In regard, developing populous countries may support economic growth by utilizing low-cost methods for producing employing it local agriculture. To completely comprehend benefits drawbacks supplement, further study long-term field applications is required.

Language: Английский

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