Sustainable Sludge Management in China: Quantifying GHG Emissions and Exploring Its Reduction Strategies

Processes, Год журнала: 2024, Номер 12(7), С. 1481 - 1481

Опубликована: Июль 15, 2024

This study aims to evaluate the emissions of greenhouse gases (GHGs) stemming from sludge treatment sector in China and investigate feasibility novel technologies curtailing these emissions, with aim fostering sustainable management methodologies. Employing a life-cycle assessment (LCA) methodology, research computed comprehensive GHG resulting treatment, taking into consideration diverse elements such as techniques (e.g., landfills, incineration, land application) geographical variations among China’s 660 municipalities. Findings indicate that total amount amounted 18.54 Mt CO2-eq 2017, incineration registering highest (10,011.53 kg CO2-eq/t dry (DS)), followed by landfills (717.51 DS) application (276.41 DS). The dispersion characteristics reveal notable regional disparities, top 1% cities responsible for 34.2% overall emissions. concentration 1 percent underscores necessity tailored mitigation measures consider localized development challenges. Principal component analysis (PCA) demonstrates economic determinants scales exert substantial influence on underscoring imperative aligning Sustainable Development Goals (SDGs) advancement. To curtail carbon footprint associated enhance sustainability, evaluated emission potential expenses technologies, encompassing thermal conversion, anaerobic digestion, hydrothermal wet oxidation. These have capacity slash 0.09–0.46 t DS comparison traditional approaches, while concurrently advancing resource recuperation principles circular economy. For instance, gasification could diminish 0.33–0.46 DS, whereas digestion yield reductions 0.09–0.30 DS. implementation innovative across Chinese municipalities potentially 15–40%. Nevertheless, further enhancements are refine their environmental efficiency guarantee enduring sustainability. By deploying embracing optimization tactics, can make contribution towards attaining national neutrality objectives development.

Язык: Английский

Study on Fenton-based discoloration of reactive-dyed waste cotton prior to textile recycling

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Окт. 19, 2024

Abstract The aim of this study is to investigate the feasibility an alternative Fenton-based advanced oxidation process for discoloration reactive-dyed waste cotton as a pre-treatment textile recycling. For that, pre-wetted dark-colored (black and blue) knitted samples 300 cm 2 are treated in 1200mL Fenton-solution containing 14 mM Fe 2+ 280mM H O at 40 °C. Characterization textiles before after treatments performed by UV VIS-spectrophotometry measuring color strength, microscopy, FTIR spectroscopy, thermal analysis tensile testing tenacity elongation. Afterwards, mechanically shredded qualitative recyclability. color-strength measurements black blue led discoloration-efficiencies respectively 61.5 72.9%. Microscopic discolored fabric also showed significant fading colored textiles. Mechanical resulted reduced strength treatment, indicating cellulosic structure besides degradation dye-molecules, confirmed reductions stability found analysis. Shredding enhanced opening, but shorter remaining fibers treatment. findings provide proof-of-concept color-stripping treatment concerning

Язык: Английский

Rapid sustainability assessment of sludge management technologies for industrial scale-up

Sustainable Production and Consumption, Год журнала: 2024, Номер unknown

Опубликована: Дек. 1, 2024

Язык: Английский