Inhibition of Polycyclic Aromatic Hydrocarbons Formation During Supercritical Water Gasification of Sewage Sludge by H2O2 Combined with Catalyst DOI Open Access
Xu Qiao, Yan Feng, Yujie Fan

et al.

Water, Journal Year: 2024, Volume and Issue: 16(22), P. 3235 - 3235

Published: Nov. 11, 2024

This work evaluated the alterations in levels and types of polycyclic aromatic hydrocarbons (PAHs) within both liquid solid products throughout process catalytic supercritical water gasification dewatered sewage sludge to examine effect various catalysts inhibit reaction pathways. The addition Ni, NaOH, Na2CO3, H2O2, KMnO4 reduced concentrations PAHs, with Ni H2O2 showing best performance. especially higher-molecular-weight compounds residues, decreased sharply as amount increased. At a 10 wt% addition, PAHs were by 91% 88%, respectively. High-ring not detected residues increased an 8 wt%. evidently inhibits PAH formation promoting ring-opening reactions initial raw inhibiting polymerization open-chain intermediate products. NaOH + or combined significantly lowered while increasing H2 yield. 5 70% 44%, respectively, yield escalated from 0.13 mol/kg OM 3.88 OM. Possible mechanisms associated pathways these are proposed.

Language: Английский

Adsorption of brilliant cresyl blue using NaOH-activated biochar derived from sewage sludge DOI Creative Commons

Majda Ben Ali,

Yassmina Bakhtaoui,

M. Flayou

et al.

E3S Web of Conferences, Journal Year: 2025, Volume and Issue: 601, P. 00087 - 00087

Published: Jan. 1, 2025

The treatment of sewage wastewater generates a substantial amount sludge, which poses significant ecotoxicological and environmental challenges. Managing this sludge is critical, as traditional disposal methods carry risks: agricultural use can lead to contamination, while landfill raises concerns about solid waste management the preservation sites. Our research focuses on converting urban into activated carbon. We employed various techniques characterize NaOH-activated biochar, including infrared (IR) analysis. BET analysis revealed specific surface area 62.35 m 2 /g. also assessed biochar for its effectiveness in adsorbing brilliant cresyl bleu (BCB). SSE error calculations indicated first-order adsorption, isotherms suggested better fit with Sips model, indicating heterogeneous adsorption an ns value 0.95. study highlights dyes such BCB.

Language: Английский

Citations

0
Potential Use of Sewage Sludge as Fertilizer in Organic Farming DOI Creative Commons
Acharya Balkrishna,

Priya Kaushik,

Shelly Singh

et al.

Cleaner Waste Systems, Journal Year: 2025, Volume and Issue: unknown, P. 100245 - 100245

Published: Feb. 1, 2025

Language: Английский

Citations

0
A STATE OF ART AND PROSPECTS OF MUNICIPAL SEWAGE SLUDGE MANAGEMENT DOI Creative Commons
И. О. Микулёнок

Energy Technologies & Resource Saving, Journal Year: 2025, Volume and Issue: 82(1), P. 77 - 106

Published: March 31, 2025

Basic data on the properties and volume of municipal (urban) sewage sludge (MSS) formation in metropolitan region Ukraine, which is a product urban treatment, are presented. The analysis current state ways MSS management makes it possible to distinguish following main directions: physical-mechanical, physical-chemical, biological combined methods handling it. its processing products (primarily biocoal (biochar, hydrochar), obtained as result incineration, pyrolysis, gasification, or hydrothermal carbonization) used both individually combination with other substances agriculture (fertilizers; chemical soil melioration); earthworks (reinforcement weak expansive soils, use tamponage compositions, arrangement embankments, leveling terrain); road construction (bitumen, asphalt concrete mixtures); building materials (cement clinker, cement, concrete, solutions, bricks, blocks, artificial stone, glass, glass ceramics, expanded clay (ceramsite), aggregate); protective coatings (paints, shotcrete, thermal insulation materials); sorbents, catalysts their carriers; compressed fuel; (pigments, electrodes electric sources, for storing certain substances, coagulants, inoculants, zeolites, fibres); chemical-thermal processes production ash, biochar, pyrolysis liquid synthesis gas fuel, raw means purposes. Currently, most expedient disposal direct forestry, industry, well fuel energy sector. It should be noted that due unpredictable qualitative quantitative composition MSS, there no single recommendations effective disposal; however, existing promising technologies analogues make choose combine various under conditions. Bibl. 141, Fig. 2.

Language: Английский

Citations

0
Molecular Composition and Hydrotreatment Effects in Sewage Sludge Pyrolysis Biocrude Revealed by Supercritical Fluid Chromatography-Mass Spectrometry DOI
Josephine S. Lübeck, Magnus Zingler Stummann, Karina Knudsmark Sjøholm

et al.

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Language: Английский

Citations

0
Transforming Sludge to Energy: A Sustainable Strategy for Resource Recovery and Environmental Protection DOI Creative Commons
Abas Siraj Hamda, Lata Deso Abo,

Bulcha Jifara Daba

et al.

Cleaner Waste Systems, Journal Year: 2025, Volume and Issue: unknown, P. 100298 - 100298

Published: April 1, 2025

Language: Английский

Citations

0
Sorption of Iodine on Biochar Derived from the Processing of Urban Sludge and Garden Waste at Different Pyrolysis Temperatures DOI Creative Commons
Bing Bai, Qingyang Liu, Li He

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(13), P. 3007 - 3007

Published: June 25, 2024

The United Nations proposed the Sustainable Development Goals with aim to make human settlements in cities resilient and sustainable. excessive discharge of urban waste including sludge garden can pollute groundwater lead emission greenhouse gases (e.g., CH4). proper recycling is essential for responsible consumption production, reducing environmental pollution addressing climate change issues. This study aimed prepare biochar high adsorption amounts iodine using peach wood from waste. was conducted examine variations mass ratio between (2/1, 1/1, 1/2) as well pyrolysis temperatures (300 °C, 500 700 °C) on carbon yield capacities biochar. Scanning electron microscopy, Brunauer–Emmett–Teller analysis, Fourier transform infrared spectrometry, powder X-ray diffraction, elemental analysis were used characterize produced at different ratios. results indicate that found be highest (>60%) a temperature 300 °C across temperatures. absorbed aqueous solution ranged 86 223 mg g−1 1:1 wood, which comparably higher than those observed other advances water treatment by offering cost-effective method derived processing

Language: Английский

Citations

1
Can pyrolysis and composting of sewage sludge reduce the release of traditional and emerging pollutants in agricultural soils? Insights from field and laboratory investigations DOI

Niluka Wickramasinghe,

Martina Vítková, Szimona Zarzsevszkij

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 364, P. 143289 - 143289

Published: Sept. 1, 2024

Language: Английский

Citations

1
Processing Orchard Grass into Carbon Bio Pellets via Hydrothermal Carbonisation—A Case Study Analysis DOI Creative Commons
Zygmunt Kowalski, Agnieszka Makara

Energies, Journal Year: 2024, Volume and Issue: 17(12), P. 2956 - 2956

Published: June 15, 2024

The presented case study evaluates the environmental and economic effects of carbon bio pellet production from orchard grass by Farmutil HS Inc. through hydrothermal carbonisation method, using obtained biofuel as a substitute for natural gas heat production. Hydrothermal is zero-waste technology that produces renewable bioenergy substituting fossil fuels non-renewable resources. Processing 60,000 t/y with this method resulted in total amount 456,780 GJ/y. This means over 60% energy produced could be substituted bioenergy. It also very important estimated cost pellets 29% lower comparison to

Language: Английский

Citations

0
CO2 reduction by chars obtained by pyrolysis of real wastes: low temperature adsorption and high temperature CO2 capture DOI Creative Commons
Norbert Miskolczi, Ningbo Gao,

C. Quan

et al.

Carbon Capture Science & Technology, Journal Year: 2024, Volume and Issue: 14, P. 100332 - 100332

Published: Oct. 30, 2024

Language: Английский

Citations

0
Inhibition of Polycyclic Aromatic Hydrocarbons Formation During Supercritical Water Gasification of Sewage Sludge by H2O2 Combined with Catalyst DOI Open Access
Xu Qiao, Yan Feng, Yujie Fan

et al.

Water, Journal Year: 2024, Volume and Issue: 16(22), P. 3235 - 3235

Published: Nov. 11, 2024

This work evaluated the alterations in levels and types of polycyclic aromatic hydrocarbons (PAHs) within both liquid solid products throughout process catalytic supercritical water gasification dewatered sewage sludge to examine effect various catalysts inhibit reaction pathways. The addition Ni, NaOH, Na2CO3, H2O2, KMnO4 reduced concentrations PAHs, with Ni H2O2 showing best performance. especially higher-molecular-weight compounds residues, decreased sharply as amount increased. At a 10 wt% addition, PAHs were by 91% 88%, respectively. High-ring not detected residues increased an 8 wt%. evidently inhibits PAH formation promoting ring-opening reactions initial raw inhibiting polymerization open-chain intermediate products. NaOH + or combined significantly lowered while increasing H2 yield. 5 70% 44%, respectively, yield escalated from 0.13 mol/kg OM 3.88 OM. Possible mechanisms associated pathways these are proposed.

Language: Английский

Citations

0