A review of wastewater sludge-to-energy generation focused on thermochemical technologies: An improved technological, economical and socio-environmental aspect

Cleaner Waste Systems, Journal Year: 2024, Volume and Issue: 7, P. 100130 - 100130

Published: Jan. 21, 2024

In response to increasing global waste generation due population growth, urbanization, and industrialization, wastewater treatment operations should shift from being solely energy consumers becoming producers by harnessing sludge (WWS). This approach holds great potential for meeting demands addressing the challenges of treatment. The recovery heat electrical WWS offers a viable solution reduce costs within WWTPs. Thermochemical technologies such as pyrolysis, gasification, combustion hold their efficiency, reaction times, retrieval capabilities. These demonstrate feasibility in terms operational costs, circular economy principles, socio-environmental impact, thanks ongoing advancements waste-to-energy research. review aims explore recovering bioenergy (biogas or syngas) generate energy, including heat, electricity, other innovative products. article provides critical comprehensive examination thermochemical technologies, taking into account technological, economic, factors. It then presents integration techniques that effectively combine anaerobic digestion with conversion enhance syngas, biogas, flue-gas energy. results this study underscore significant sludge-to-energy schemes.

Language: Английский

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Impact of Iron Oxide Nanoparticles on Anaerobic Co-digestion of Chicken Manure and Sewage Sludge Substrates

Engineered Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

This investigation examined the influence of iron oxide nanoparticles (IONP) on anaerobic codigestion chicken manure (CM) and sewage sludge (SS).The experiment was conducted in many batches, with temperature maintained at 35°C, using a RESPIROMETRIC Sensor System 6 Maxi-BMP (RSS-BMP).The utilisation IONP dosages 40, 80, 120, 160 mg/L batches M1, M2, M3, M4.The results showed that introduction concentration 40 into had no significant effect methanogenesis process consequent generation methane.Exposing samples to doses comparable beneficial impact.In addition, there also an increase methane production.The CH4 increased by 32.5%, 50.5%, 62.7% when employing IONP, respectively, compared control test.IONP, present mg/L, achieved biodegradability 96.7%, but incubation (C4) only 56.1%.

Language: Английский

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Impact of Iron Oxide Nanoparticles on Anaerobic Co-Digestion of Cow Manure and Sewage Sludge

Energies, Journal Year: 2023, Volume and Issue: 16(15), P. 5844 - 5844

Published: Aug. 7, 2023

Supplementation with iron oxide nanoparticles has been suggested as a potential method for improving energy generation through anaerobic digestion, specifically by enhancing the rate of methane production. This investigation examined effects (Fe3O4) (NPs) on co-digestion cow manure (CM) and sewage sludge (SS) batch testing conducted under mesophilic conditions (35 °C) using RESPIROMETRIC Sensor System 6 Maxi—BMP (RSS-BMP). The use Fe3O4 at doses 40, 80, 120, 160 mg/L (batches M1, M2, M3, M5) was studied. in combination mixtures different ratios (M4, M5, M6) further investigated. findings indicate that addition concentration 40 to batches did not significantly impact hydrolysis process subsequent Exposing samples NPs concentrations resulted similar positive effect, evidenced percentages approximately 94%, compared 60% control (C2). Furthermore, production also increased. biodegradability 97.3%, 51.4% incubation Moreover, demonstrate supplementing varying mixture had significant both Specifically, 94.24, 98.74, 96.78% were achieved M4, M6, respectively, whereas (C1, C2, C3) only 56.78, 60.21, 58.74%. Additionally, M6 78.4, 97.3, 88.3%, respectively. In contrast, 44.24, 51.4, 49.1%.

Language: Английский

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Energy-saving pretreatments affect pelagic Sargassum composition and DNA metabarcoding reveals the microbial community involved in methane yield

PLoS ONE, Journal Year: 2023, Volume and Issue: 18(8), P. e0289972 - e0289972

Published: Aug. 17, 2023

Sargassum spp. flood the Caribbean coastline, causing damage to local economy and environment. Anaerobic digestion (AD) has been proposed as an attractive option for turning macroalgae into valuable resources. a complex composition that affects microbial involved in AD which generates low methane yield. This study aimed improve yield of pelagic Sargassum, using different energy-saving pretreatments identifying community associated with production. We applied algal biomass assessed biomethane potential (BMP) test. The communities best- worst-performing methanogenic systems were analyzed by high-throughput sequencing. results showed pretreatment modified content inorganic compounds, fibers, C:N ratio, had strong positive correlation BMP. water washing resulted best yield, increase 38%. DNA metabarcoding analysis revealed bacterial genera Marinilabiliaceae_uncultured, DMER64, Treponema, Hydrogenispora, well archaea Methanosarcina, RumEn_M2, Bathyarchaeia, Methanomassiliicocus, dominated high is first demonstrate structure presented this can help overcome limitations

Language: Английский

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Effect of Particle Size on the Biomethanation Kinetics of Mechanically Pretreated Sargassum spp. Biomass

Methane, Journal Year: 2024, Volume and Issue: 3(1), P. 160 - 171

Published: March 4, 2024

The collection and use of Sargassum spp. as feedstock for the production valuable products such biomethane by anaerobic digestion (AD) would mitigate negative impact blooms costs related to waste management in Dominican Republic. In this work, effect particle size pelagic biomass, a result mechanical pretreatments, on biomethanation was determined. granulometric analysis mechanically pre-treated biomass carried out using Mastersize2000. Biochemical Methane Potential (BMP) samples determined an Automatic System Test II (AMPTS® II). kinetic parameters reaction were scientifically evaluated First order Model modified Gompertz Model. showed monomodal distribution crushed (505 µm) bimodal milling sample (107 µm). means is characterized presence fine large particles. We observed that BMP increased 78.85% when particles reduced from 50,000 µm 505 73.61% 107 µm. A low methane yield compared could be excessive reduction size. are subject formation aggregates consequently, contact area between algae cells microorganisms operate process decreases.

Language: Английский

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Efficient reuse of Sargassum spp. biomass and organic fraction of municipal solid waste by anaerobic co-digestion in the Dominican Republic: Evaluation of biochemical methanogenic potential and reaction rates

Applied Chemical Engineering, Journal Year: 2024, Volume and Issue: 7(2), P. 2081 - 2081

Published: April 9, 2024

Anaerobic digestion (AD) is a potential solution to valorize invasive pelagic Sargassum spp. (SP) biomass characterized by low carbon/nitrogen (C/N) ratio, which, in addition the presence of indigestible fiber, sulfide, salt, ash, and polyphenol content, are inhibitors AD process. Furthermore, its chemical composition depends on season region harvesting. To increase biogas yields, must be subjected pre-treatment or an anaerobic co-digestion process with other waste biomass. In this paper results municipal solid (OFMSW) batches different weight ratios reported compared mono-digestion two organic matrices. The objective provide optimized SP OFMSW ratio for sustainable production Dominican Republic. Mono-digestion showed longest reaction time lowest biomethane yield as it lasted 30 days provided cumulative volume equal 79.68 NmLg−1VS. led shortening 10 biomethane. It can attributed more favorable C/N readily digestible compounds lower ash content those batches. kinetics all investigated properly fitted Modified Gompertz model. system spp.-OFMSW 33:67 allows obtain notable bio-methane 327.27 ± 15.93 NmLg−1VS, ten times higher than from alone.

Language: Английский

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Adaptation of a microbial consortium to pelagic Sargassum modifies its taxonomic and functional profile that improves biomethane potential

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(43), P. 55169 - 55186

Published: Sept. 2, 2024

Language: Английский

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One-Step Strategy Streamlining Microalgae Biofuel Production: Integration of Microalgae Harvesting and Methane Production by Dual-Functional Magnetic Nanoparticles

ACS ES&T Water, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 9, 2024

Anaerobic digestion (AD) of microalgae to produce methane is a significant pathway for treatment and high-value utilization but often constrained by the high costs associated with harvesting poor digestibility microalgae. To address these limitations, we suggest herein new scheme that integrates AD means magnetic nanoparticles (MNPs). The MNPs play an important role in not only flocculating negatively charged also promoting production. With dosage 0.6 g per gram cell pH close natural water, microalgal efficiency 95.5 ± 1.1% was achieved. Next, cumulative production increased 15.1% when MNPs-flocculated were codigested waste activated sludge. accelerated solubilization acidification organic substrates, as well induced enrichment hydrolytic acidifying microorganisms (e.g., vadinHA17) acetotrophic methanogens methanosaeta), identified major contributors. Moreover, successfully recovered from residue efficiently reused over five cycles. This integrated technology demonstrated positive energy balance higher than conventional processes, advancing both efficient collection

Language: Английский

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Enhancement of brown algae of the Ionian sea through the anaerobic digestion process

Euro-Mediterranean Journal for Environmental Integration, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 28, 2024

Language: Английский

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