Environment impact and bioenergy analysis on the microwave pyrolysis of WAS from food industry: Comparison of CO2 and N2 atmosphere

Article Thermodynamics

Energy-efficient thermal waste treatment process with no CO2 emission: A case study of waste tea bag

Soosan Kim et al.

Summary: Everyday waste and greenhouse gas emissions are serious environmental problems that require interventions. Utilizing thermal treatment and upcycling strategies can convert waste into valuable materials, reducing environmental damage.

ENERGY (2022)

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Article Engineering, Environmental

Comparative life-cycle assessment of pyrolysis processes for producing bio-oil, biochar, and activated carbon from sewage sludge

Carol Huang et al.

Summary: This study evaluates the feasibility of pyrolysis scenarios for sewage sludge treatment using life-cycle assessment, energy consumption analysis, carbon emission analysis, and economic benefit analysis. Results show that pyrolysis scenarios producing bio-oil and biochar have significant improvement in terms of environmental impact and profitability, making them eco-friendly sewage sludge treatment methods.

RESOURCES CONSERVATION AND RECYCLING (2022)

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Article Energy & Fuels

Waste-to-BioEnergy pathway for waste activated sludge from food processing industries: An experiment on the valorization potential under CO2 and N2 atmospheres through microwave-induced pyrolysis

Guo Ren Mong et al.

Summary: Pyrolysis is an effective method for converting waste activated sludge (WAS) into higher-value bio-products, with CO2 pyrolysis tending to increase water formation, produce biochar with higher energy density and generate gaseous products with a higher CO proportion. WAS pyrolysis under N-2 atmosphere showed overall better energy profit, higher gaseous yield with higher H-2 proportion, and biochar of larger surface area. Integrating CO2 as the pyrolysis medium could potentially relieve the carbon burden on the environment.

FUEL (2022)

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Article Agricultural Engineering

Life cycle assessment of the integration of anaerobic digestion and pyrolysis for treatment of municipal solid waste

Junqi Wang et al.

Summary: By comparing the environmental impacts of anaerobic digestion-pyrolysis and pyrolysis-anaerobic digestion integrations with single anaerobic digestion and pyrolysis technologies for organic solid waste, it was found that anaerobic digestion-pyrolysis has the least environmental impact, while pyrolysis-anaerobic digestion exhibits the heaviest environmental burden. Hence, the anaerobic digestion-pyrolysis integration is considered the top priority for treating organic solid waste from an environmental perspective.

BIORESOURCE TECHNOLOGY (2021)

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Article Thermodynamics

Pyrolysis of waste activated sludge from food manufacturing industry: Thermal degradation, kinetics and thermodynamics analysis

Guo Ren Mong et al.

Summary: The rising environmental concern over industrial waste disposal has driven the exploration of alternative management methods. The waste-to-energy route has garnered interest as a potential way to transform uncontrollable waste into energy-rich by-products. Waste activated sludge from the food manufacturing industry has been investigated as a novel feedstock for pyrolysis, showing promise in the conversion into valuable bio-products.

ENERGY (2021)

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Article Green & Sustainable Science & Technology

Recycled valorization of bio-oil distillation residue via CO2-induced co-pyrolysis with biomass

Rui Diao et al.

Summary: This study explored a method of recycling the distillation residue of bio-oil by co-pyrolysis with walnut shell under CO2-induced atmospheres, investigating co-pyrolytic mechanism, kinetic responses, and product distribution. The results showed that the co-pyrolytic interaction suppressed high-temperature pyrolysis, with activation energy influenced by induced atmospheres and DR fractions, and CO2 mainly altering kinetic mechanisms at early stages.

JOURNAL OF CLEANER PRODUCTION (2021)

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Article Environmental Sciences

Faecal sludge pyrolysis: Understanding the relationships between organic composition and thermal decomposition

Benedict C. Krueger et al.

Summary: This study provides mechanistic insights into faecal sludge pyrolysis as a function of temperature and feedstock composition, emphasizing the importance of considering the organic composition of the feedstock for the development and optimization of faecal sludge pyrolysis. The research improves our understanding of the properties and thermal decomposition characteristics of faecal sludge, highlighting the crucial role of organic compounds in the pyrolysis process.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

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Article Environmental Sciences

Pyrolysis of sewage sludge for sustainable biofuels and value-added biochar production

Praveen Kumar Ghodke et al.

Summary: This study focuses on the pyrolysis of sewage sludge to produce eco-friendly fuels and value-added biochar products. The experiments showed that at the optimal temperature of 500 degrees C, the product yield consisted of 22.4 wt% bio-oil, 18.9 wt% pyrolysis gases, and 58.7 wt% biochar. The chemical composition and fuel qualities of bio-oil and pyrolysis gases make them suitable for engine use. Additionally, the biochar analysis demonstrated its potential as organic manure in the agriculture sector.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

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Article Thermodynamics

Multivariate optimisation study and life cycle assessment of microwave-induced pyrolysis of horse manure for waste valorisation and management

Guo Ren Mong et al.

Summary: The study demonstrates that using microwave pyrolysis to process horse manure for the production of bio-fuels and bio-chemicals is effective in generating products with increased energy density and potential environmental advantages.

ENERGY (2021)

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Article Environmental Sciences

Benchmarking environmental and economic indicators of sludge management alternatives aimed at enhanced energy efficiency and nutrient recovery

A. Arias et al.

Summary: This study evaluates different alternatives and strategies for sludge management and treatment from the perspective of life cycle analysis, with a focus on options that reduce environmental impacts and economic costs. The evaluation of two pre-treatments and two post-treatments aims to improve the eco-balance of the anaerobic digestion process.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

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Article Environmental Sciences

Full-scale municipal sludge pyrolysis in China: Design fundamentals, environmental and economic assessments, and future perspectives

Hongxi Luo et al.

Summary: The research demonstrates that sludge with higher organic content and lower moisture content requires less natural gas consumption in pyrolysis, leading to improved environmental and economic performance of the system. The economic performance of the system is more sensitive to the system size, with larger pyrolysis systems being more economically favorable.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Article Chemistry, Multidisciplinary

Valorization of waste tea bags via CO2-assisted pyrolysis

Nahyeon Lee et al.

Summary: The study demonstrates that CO2-assisted pyrolysis of waste tea bags can result in higher heating value and increased yield of pyrolytic gases, while preventing the formation of environmental pollutants. This research highlights the effectiveness of CO2 utilization in the pyrolysis of everyday waste.

JOURNAL OF CO2 UTILIZATION (2021)

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Article Environmental Sciences

Thermodynamics, kinetics and thermal decomposition characteristics of sewage sludge during slow pyrolysis

Katlego Mphahlele et al.

Summary: Pyrolysis of sewage sludge has shown potential for producing value-added chemicals, with decomposition occurring in three stages and the main decomposition taking place at 150-570 degrees Celsius. Increasing heating rate shifts characteristic temperatures higher, and calculated activation energies average around 220 kJ/mol. Multiple reactions and complex reaction chemistry are involved in the pyrolysis process, making it challenging to define global kinetics explicitly.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

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Review Environmental Sciences

Life cycle assessment of sewage sludge treatment and disposal based on nutrient and energy recovery: A review

An Ding et al.

Summary: This review focuses on the environmental sustainability of urban sludge management schemes and the potential for resource recovery and energy savings through Life Cycle Assessment (LCA). Comparative analysis reveals differences in environmental impacts between existing and emerging technologies, highlighting the importance of addressing toxic effects and minimizing environmental damage in future LCA research.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Article Thermodynamics

The levelized cost of negative CO2 emissions from thermochemical conversion of biomass coupled with carbon capture and storage

Fangwei Cheng et al.

Summary: This study evaluates the feasibility of four thermochemical conversion technologies coupled with carbon capture and storage as NETs, finding that slow pyrolysis of woody wastes and crop residues constitute economically viable NETs, while other pathways require carbon incentives to break even.

ENERGY CONVERSION AND MANAGEMENT (2021)

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Review Green & Sustainable Science & Technology