Characterization of Concentrated Leachate-Activated Char Prepared from Spent Coffee Ground in Slow Pyrolysis

Published: June 6, 2024

The pyrolysis process has emerged as an attractive option for waste treatment. In this technology, inorganic compounds play catalytic effects in the pyrolytic reaction of organic materials, increa-sing char's yield, porosity, and physicochemical properties. present research investigates compares slow spent coffee grounds (SCG) using potassium hydroxide (KOH) (weight ratio 1:1) landfill leachate membrane concentrate (LLMC) residue pyrolitic additives. We hypothesized that high content alkali alkaline earth metals LLMC could enhance yield or improve quality carbon-based material produced pyrolysis. This strategy be a sustainable alternative valorizing SCG wastes, replacing catalyzing agents such steam, CO2, chemical additives used on industrial scale. char yields ranged from 18 to 24%. had low specific surface area (4.5 m2 g-1), contrasting with notable areas observed both ac-tivated chars. particular, KOH-activated displayed higher than LLMC-activated (1960 vs. 1130 g-1). On other hand, combustion enthalpy was estimated at 22 MJ kg-1. value 22% energy comparison. Our findings confirm KOH produces microporous area. contrast, resulting demonstrates calorific value. contribute establishing potential applications residues produce high-value materials.

Language: Английский

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Mini-Review on Aged Refuse Bioreactors for Landfill Leachate Management

Springer water, Journal Year: 2024, Volume and Issue: unknown, P. 295 - 306

Published: Jan. 1, 2024

Language: Английский

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Advanced approaches to microplastic removal in landfill leachate: Advanced oxidation processes (AOPs), biodegradation, and membrane filtration

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 101056 - 101056

Published: Dec. 1, 2024

Language: Английский

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Thermal Characterization of Biochars Produced in Slow Co-Pyrolysis of Spent Coffee Ground and Concentrated Landfill Leachate Residue

Published: May 17, 2023

Resource depletion and climate change have fostered sustainable initiatives in the waste management sector.Pyrolysis (Py) has emerged as an option for valorizing spent coffee grounds (SCG).In addition, inorganic compounds can catalytic effects on pyrolytic reaction of organic materials, increasing char yield porosity biochar.This study investigates slow pyrolysis SCG using concentrated landfill leachate residue (CLLR) (1:1 wt%) a pyrolitic additive due to its high salinity.Biochars were characterized based their thermal behavior discuss environmental benefits potential applications.Slow-py experiments conducted labscale pyrolizer, characterization was performed TA Instruments, specifically SDTQ600 model.Biochars by higher water contents heating rates than those experienced feedstocks.It is suggested that metal content CLLR could biochar's stability, decreasing decomposition temperature.Values 9.18 wt% 18.11 MJ kg -1 23.25 22.05 biochars produced wt%), respectively.Future studies will include biochar ecotoxicity analyses measure carbon-energy balance.

Language: Английский

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A Short Review on Dye-Wastewater Valorization Using Up-Flow Anaerobic Sludge Blanket Reactors

Waste, Journal Year: 2023, Volume and Issue: 1(4), P. 960 - 976

Published: Nov. 24, 2023

Dye-containing effluent generated in textile industries is polluting and complex wastewater. It should be managed adequately before its final destination. The up-flow anaerobic blanket (UASB) reactor application an ecofriendly cost-competitive treatment. present study briefly reviews the UASB for dye-containing wastewater valorization. Bioenergy clean-water production potential during treatment are emphasized to promote resource recovery industries. Hydraulic retention time (HRT), organic loading rate (OLR), pH, temperature, hydraulic mixing influence sludge granulation, microbial activity, dye removal. HRT OLR ranges of 6–24 h 1–12 kg m−3 d−1 chemical oxygen demand (COD) at a mesophilic temperature (30–40 °C) recommended efficient In these conditions, efficiencies color COD 50–97% 60–90% reported bench-scale studies. Complex structures can hinder biomineralization. Pretreatment may necessary reduce concentration. Carbon-source redox mediators added expedite kinetic reactions. A biogas yield 1.48–2.70 L UASB, which treats effluents, documented. Cotreatment locally available substrate could increase productivity reactors. Organic waste industry, such as sludge, cotton, starch, make cotreatment cost competitive. water reuse allow environmental economic benefits. Studies on combined systems integrating membrane processes, ultrafiltration nanofiltration, reusable pretreatment improvements might realize complete technology. bioenergy usage integrated trains operating costs assist process sustainability industry.

Language: Английский

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