Enhancing biomethane yield from food waste through surfactant-assisted mechanical pretreatment: An optimization approach

Journal of Renewable and Sustainable Energy, Journal Year: 2024, Volume and Issue: 16(4)

Published: July 1, 2024

In the present investigation, response surface methodology-based central composite design (RSM-CCD) was used to model potential of improving solubilization food waste through surfactant-assisted homogenization pretreatment (SAHP). RSM-CCD models were investigated based on speed and time for HP, surfactant dosage, at optimized by HP SAHP input parameters chemical oxygen demand (COD) (CODsol) as parameters. optimum condition 7020 rpm, 9.9 min attain 11.6% with 292.8 kJ/kg total solid (TS) specific energy consumption (ESp). On other hand, 19.9% CODsol obtained in under conditions 6.3 μl 3.7 min, ESp 116.2 TS, respectively. The increment decrease 176.2 TS indicate significance combined synergistic action surfactant. Eventually, maximum biomethane generation found 67 ml/gCOD, higher than that (40 ml/gCOD) without samples (17 ml/gCOD),

Language: Английский

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Microwaves and Ultrasound as Emerging Techniques for Lignocellulosic Materials

Materials, Journal Year: 2023, Volume and Issue: 16(23), P. 7351 - 7351

Published: Nov. 25, 2023

Currently, in the context of biorefinery and bioeconomy, lignocellulosic biomass is increasingly used to produce biofuels, biochemicals other value-added products. Microwaves ultrasound are emerging techniques that enable efficient environmentally sustainable routes transformation biomass. This review presents some most important works published last few years on application microwaves and/or materials pretreatment can be as a starting point for research into this theme. divided four parts. In Part I, theoretical fundamentals microwave treatments reviewed. Dielectric constants biomass, factors influence pretreatment, subjects addressed. II, effects these have (on size surface area particle; content lignin, hemicellulose cellulose; crystallinity index effect solubilization organic matter; hydrolysis reduction sugars) discussed. III, emphasis given contribution obtaining context, several examples liquefaction extraction procedures presented. IV describes performing sonocatalysis obtain products, such furfural, whose production significantly reduced by treatment.

Language: Английский

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Lignocellulosic biomass conversion to levulinic acid via acid catalysis: current methods, opportunities and challenges for self-sustaining biorefineries.

International Journal of Thermofluids, Journal Year: 2025, Volume and Issue: unknown, P. 101175 - 101175

Published: March 1, 2025

Language: Английский

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Sewage sludge management and enhanced energy recovery using anaerobic digestion: an insight

Water Science & Technology, Journal Year: 2024, Volume and Issue: 90(3), P. 696 - 720

Published: Aug. 1, 2024

Sewage sludge (SS) is a potential source of bioenergy, yet its management global concern. Anaerobic digestion (AD) applied to effectively valorize SS by reclaiming energy in the form methane. However, complex floc structure hinders hydrolysis during AD process, thus resulting lower process efficiency. To overcome rate-limiting hydrolysis, various pre-treatment methods have been developed enhance This review aims provide insights into recent advancements technologies, including mechanical, chemical, thermal, and biological methods. Each technology was critically evaluated compared, relative worth summarized based on full-scale applicability, along with economic benefits, performance improvements, impact digested sludge. The paper illuminates readers about existing research gaps, future needed for successful implementation these approaches at full scale.

Language: Английский

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Unlocking the potential of spent coffee grounds via a comprehensive biorefinery approach: production of microbial oil and carotenoids under fed-batch fermentation

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(24), P. 35483 - 35497

Published: May 10, 2024

Language: Английский

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Recent developments on sustainable biobutanol production: a novel integrative review

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(34), P. 46858 - 46876

Published: July 9, 2024

Language: Английский

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Microwaves and Ultrasounds as Emerging Techniques for Lignocellulosic Materials

Published: Oct. 21, 2023

Currently, in a context of biorefinery and bioeconomy, lignocellulosic biomass is increasingly used to produce biofuels, biochemicals value-added products. Microwaves ultrasounds are emerging techniques that enable efficient environmentally more sustainable routes the transformation biomass. This review divided into four parts. In Part I, theoretical foundations microwaves revisited. Dielectric constants for biomass, factors influence pre-treatment, some subjects addressed. II, effects these technologies have on (on size surface area particle; content lignin, hemicellulose cellulose; crystallinity index effect solubilization organic matter; hydrolysis reduction sugars) analyzed. III, emphasis given how can contribute achievement this context, several examples liquefactions extractions presented. IV describes sonocatalysis obtain products such as instancethe production furfural, which significantly reduced by ultrasound.

Language: Английский

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Comparative Study of Different Pretreatment and Combustion Methods on the Grindability of Rice-Husk-Based SiO2

Nanomaterials, Journal Year: 2023, Volume and Issue: 13(22), P. 2951 - 2951

Published: Nov. 15, 2023

The rice husk (RH) combustion pretreatment method plays a crucial role in the extraction of nanoscale SiO2 from RH as silicon source. This study examined effects diverse methods and temperatures on particle size distribution high-purity amorphous extracted ash (RHA) post combustion. experiment was structured using Taguchi method, employing an L9 (21 × 33) orthogonal mixing table. median diameter (D50) served output response parameter, with drying (A), temperature (B), torrefaction (C), (D) input parameters. results showed (C) being predominant factor affecting D50, which decreased increasing (C). optimal parameter combination identified A2B2C3D2. verification test revealed that roasting could improve abrasiveness Rh-based silica reduce average size. Torrefaction at medium might narrow range RHA-SiO2. We discovered purity increased by evaluating concentration sample. production RHA concentrations up to 92.3% investigated. X-ray diffraction analysis affirmed SiO2’s crystal structure remained unaltered across different treatment methods, consistently presenting amorphous. These provide reference for extracting high-value products through

Language: Английский

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Machine learning models for the prediction on efficacy of ionic liquid-aided biomass pretreatment

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 6, 2024

Abstract The influence of ionic liquids (ILs) characteristics, lignocellulosic biomass (LCB) properties, and process conditions on LCB pretreatment is not well understood. In this study, a total 129 experimental data cellulose, hemicellulose, lignin, solid recovery from IL-based were compiled literature to develop machine learning models. Following imputation, bilayer artificial neural network (ANN) random forest (RF) regression developed model the dataset. full-featured ANN following Bayesian hyperparameter (HP) optimization though offered excellent fit training (R 2 :0.936–0.994), cross-validation CV ) performance remained marginally poor, i.e. , between 0.547 0.761. fitness HP-optimized RF models varied 0.824–0.939 for regression, 0.383–0.831 in cross-validation. Temperature time had been most important predictors, except hemicellulose recovery. predictor selection combined with HPO improved R boundary (0.555–0.825), as (0.474–0.824). As predictive depending target response, use larger homogeneous dataset may be warranted.

Language: Английский

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Optimizing the Extraction of Sugars from Sewage Sludge Using Ultrasound Combined with Thermal–Alkali

Water, Journal Year: 2024, Volume and Issue: 16(9), P. 1289 - 1289

Published: April 30, 2024

The extraction and utilization of sugars from readily available cost-effective sewage sludge increases the economic potential this residue, contributing to sustainable urban development. work presented here presents a novel method in which can be directly extracted following an ultrasound + thermal–alkali pretreatment. best results indicated that by subjecting 240 W for 20 min, followed alkali digestion using 6 mL 2 M NaOH solution at 48 °C 60 it was possible maximize yield crude sugar (34.22 wt.% dry) with purity 46.80%, reaching efficiency 99.84%. Response surface methodology used optimize yields based on experimental data, value 34.67 dry when employing exposure time 12.5 min 57.5 min; these were considered consistent data.

Language: Английский

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