Enhancing anaerobic digestion of sludge with dual-heteroatom-doped biochar derived from digested sludge: In-situ reuse of anaerobic residues for system self-circulation

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121303 - 121303

Published: March 1, 2025

Language: Английский

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Carbon Composite Derived from Spent Bleaching Earth for Rubbery Wastewater Treatment

Journal of Composites Science, Journal Year: 2025, Volume and Issue: 9(3), P. 126 - 126

Published: March 10, 2025

The industrial production of palm oil generates substantial amounts Spent Bleaching Earth (SBE), a waste byproduct from the bleaching process. In Malaysia and Indonesia, SBE is typically landfilled, causing environmental risks such as greenhouse gas emissions contamination. Wastewater rubber industry also contains harmful pollutants that require effective treatment. This study proposes sustainable solution by converting into carbon composites (CCs) for treating wastewater. Characterization CCs using XRD, BET, FESEM, FTIR revealed its porous structure, high surface area, functional groups, contributing to excellent adsorption properties. Response Surface Methodology (RSM) optimized treatment conditions, determining 90.56 min contact time 0.75 g adsorbent weight optimal maximum chemical oxygen demand (COD) turbidity removal. Quadratic models showed R2 values 0.8828 COD removal 0.8336 reduction, with numerical optimization achieving 90.30% reduction 49.02% Verification experiments confirmed model reliability minimal deviation (0.37%). These findings demonstrate potential SBE-derived an eco-friendly challenges in industries.

Language: Английский

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Green Process for the Preparation of MnCO3 and Recovery of By-Product Mg-Containing (NH4)2SO4 Solution

Minerals, Journal Year: 2025, Volume and Issue: 15(3), P. 304 - 304

Published: March 15, 2025

The conventional manganese carbonate preparation process faces challenges such as low resource utilization efficiency and difficulties in treating by-product Mg-containing ammonium sulfate solution. In this study, a two-stage leaching was developed to efficiently extract Mn Mg from the ore. NH4HCO3 used precipitant convert Mn2+ leachate MnCO3, achieving precipitation of 99.89%, resulting product contained 44.45% Mn, meeting first-class indicators HG/T 4203-2011 (Chinese standard on for industrial use). To further enhance utilization, combined stripping–adsorption designed treat solution generated during carbonization process. Subsequently, economically valuable gypsum magnesium oxide products were prepared. Additionally, 88.20% NH3 stripped recycled prepare then carbonization. Finally, purified free ammonia nitrogen obtained using 001×7 resin dynamically adsorb filtrates stripping process, maximum adsorption capacity 51.14 mg/g. This provides novel approach clean production industry.

Language: Английский

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A potential closed-loop reutilization of iron sludge for wastewater treatment through the solid state reaction with spent coffee grounds

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown, P. 107200 - 107200

Published: April 1, 2025

Language: Английский

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