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61,005 resultsShowing papers similar to The use of hydrodynamic cavitation for waste-to-energy approach to enhance methane production from waste activated sludge
ClearIntegral analysis of hydrodynamic cavitation effects on waste activated sludge characteristics, potentially toxic metals, microorganisms and identification of microplastics
Researchers investigated hydrodynamic cavitation as a pretreatment for waste activated sludge, analyzing its effects on sludge characteristics, toxic metals, microorganisms, and identifying microplastics present in the sludge to improve anaerobic digestion efficiency.
Integral analysis of hydrodynamic cavitation effects on waste activated sludge characteristics, potentially toxic metals, microorganisms and identification of microplastics
Researchers tested hydrodynamic cavitation — a process using high-speed water flow to create pressure changes — as a pretreatment to improve sewage sludge digestion and measured its effects on microplastics in the sludge. The process reduced some sludge properties that limit biogas production, but its effect on microplastic fragmentation was also assessed. The study is relevant to understanding how wastewater treatment alters microplastic size and abundance in sludge spread on farmland.
Conversion of Materials and Energy in Anaerobic Digestion of Sewage Sludge with High-Pressure Homogenization Pretreatment
Not a microplastics paper — this study evaluates high-pressure homogenization as a pretreatment for sewage sludge before anaerobic digestion, finding it increases methane gas yield by up to 57% while helping to optimize energy use in wastewater treatment.
A perspective on hydrothermal processing of sewage sludge
Researchers reviewed hydrothermal processing as a strategy for treating sewage sludge, finding it can recover eleven times more energy than landfilling and, when integrated with anaerobic digestion, offers a scalable approach to converting the 79 million dry tons of liquid organic waste the US generates annually.
Evaluating the Effects of Different Pretreatments on Anaerobic Digestion of Waste Activated Sludge Containing Polystyrene Microplastics
Researchers found that thermal and chemical pretreatments improved methane yields by 17-20% during anaerobic digestion of waste activated sludge containing polystyrene microplastics, though chemical methods caused greater leaching of additives from the plastic particles.
Thermal hydrolysis alleviates polyethylene microplastic-induced stress in anaerobic digestion of waste activated sludge
Scientists found that pretreating waste sludge with heat before anaerobic digestion reduced the negative effects that polyethylene microplastics have on the process. The thermal treatment improved methane production and helped maintain healthy microbial communities even in the presence of microplastics. The study suggests that thermal hydrolysis could be a practical strategy for wastewater treatment plants dealing with microplastic-contaminated sludge.
Electrifying anaerobic granular sludge for enhanced waste anaerobic digestion and biogas production
Researchers investigated bioelectrochemical anaerobic digestion (BEAD) using intact anaerobic granular sludge (AGS) as a biocatalyst, optimizing methane production by controlling applied voltage and acetate loading. The system exploited interactions between exoelectrogens and methanogens within the AGS to enhance biogas yields compared to conventional anaerobic digestion.
Recent Developments in the Application of Ultrasonication in Pre-Treatment of Municipal Sewage Sludge
Not relevant to microplastics — this paper reviews ultrasonication as a pre-treatment method for municipal sewage sludge to improve anaerobic digestion efficiency, with no focus on plastic contamination.
Effect of microplastic on anaerobic digestion of wasted activated sludge
This study investigated how varying doses of microplastics affect methane production during anaerobic digestion of waste activated sludge, testing concentrations from 0 to 100,000 particles per gram. Higher microplastic doses progressively inhibited methane production, suggesting that high microplastic loads in wastewater treatment sludge can impair biogas recovery.
Removal of toxic metals from sewage sludge by EDTA and hydrodynamic cavitation and use of the sludge as fertilizer
This study tested EDTA chelation combined with hydrodynamic cavitation to remove toxic metals from sewage sludge, achieving high removal efficiencies for lead, cadmium, and zinc, enabling safer use of the treated sludge as agricultural fertilizer.
Impact of alkaline thermal hydrolysis on anaerobic digestion of mixed sludge contaminated with microplastics
Researchers tested alkaline thermal hydrolysis pretreatment on sludge containing polyethylene and PVC microplastics before anaerobic digestion, finding that the pretreatment altered how microplastics affected subsequent methane production, with effects varying by polymer type and concentration.
Microplastics in sewage sludge destined to anaerobic digestion: The potential role of thermal pretreatment
Researchers found that thermal pretreatment of sewage sludge at 120°C did not degrade conventional PET microplastics but did alter biodegradable microplastics, which also boosted methane production during anaerobic digestion, raising concerns about how different microplastic types behave in sludge treatment.
Advancements and Innovations in Harnessing Microbial Processes for Enhanced Biogas Production from Waste Materials
This review examines microbial processes in anaerobic digestion for enhanced biogas production from agricultural residues, food waste, animal manure, and municipal solid waste, covering feedstock selection, microbial community dynamics, and biotechnological innovations. Advanced approaches including co-digestion, pretreatment, and microbial augmentation are highlighted as strategies for improving biogas yields.
Efficacité des couplages digestion anaérobie mésophile- réacteur thermophile pour la réduction de la production de boues, la production de biogaz et l’élimination des micropolluants
This study evaluated a mesophilic–thermophilic anaerobic digestion configuration for sewage sludge treatment, finding it improved sludge volume reduction and biogas production while offering potential for micropollutant elimination compared to conventional digestion.
Thermal Disintegration of Waste-Activated Sludge
This review examines thermal pretreatment methods for managing waste-activated sludge from wastewater treatment plants, covering how heat breaks down organic structures to improve biodegradability and dewatering. Combining thermal treatment with chemical methods yields higher biogas output, lower pathogen levels, and reduced environmental risk.
MicroplasticDegradation through Thermal Hydrolysisin Sewage Sludge and Its Impact on the Anaerobic Process
Researchers investigated the fate of microplastics in sewage sludge during thermal hydrolysis pretreatment and found that temperatures of 140-180°C significantly degraded microplastics while also affecting subsequent anaerobic biogas production from the treated sludge.
Impact of preozonation on biogas potential of PVC microplastics-containing waste sludge
Researchers evaluated the impact of preozonation on anaerobic digestion of wastewater sludge contaminated with PVC microplastics, measuring biogas and methane yields to determine whether ozone pretreatment could overcome the inhibitory effect that insoluble PVC particles exert on sludge-degrading microorganisms.
Revealing the Mechanisms of Polyethylene Microplastics Affecting Anaerobic Digestion of Waste Activated Sludge
Researchers studied how polyethylene microplastics affect the anaerobic digestion of sewage sludge, a common wastewater treatment process. They found that higher concentrations of microplastics significantly reduced methane production by disrupting microbial communities and enzyme activities essential for digestion. The study reveals that microplastic contamination in wastewater systems can undermine the efficiency of sludge treatment and biogas generation.
The Potential of Ozonation to Reduce Impact of Waste Sludge-Entrapped Microplastics to Biogas Production
Wastewater treatment plants concentrate microplastics from sewage into the resulting sludge, and this study tested whether ozonation could reduce the harm those microplastics cause during anaerobic digestion used to produce biogas. The findings showed that PET and polypropylene microplastics alter methane yields from sludge digestion in concentration-dependent ways, and that ozone pretreatment partially mitigates the inhibition caused by polypropylene — though the interactions are complex and require further optimization before widespread use.
Opportunities regarding the use of technologies of energy recovery from sewage sludge
This review evaluated pyrolysis, gasification, and incineration as energy recovery technologies for sewage sludge management, finding pyrolysis advantageous due to low emissions, reduced heavy metal mobility, and useful by-products including bio-gas, bio-oil, and bio-char adsorbents.
Impact of Conditioning Agent Addition Sequence on Dewatering Performance of Advanced Anaerobic Digested Sludge
Not relevant to microplastics — this study investigates how the order of adding coagulants and flocculants affects the dewatering efficiency of anaerobically digested sewage sludge.
Effects of co-substrates’ mixing ratios and loading rate variations on food and agricultural wastes’ anaerobic co-digestion performance
This study optimized anaerobic co-digestion of food and agricultural waste to produce biogas, exploring how mixing ratios and loading rates affect performance. Diverting organic waste to bioenergy reduces the fraction of municipal waste that enters landfills and ultimately contributes to microplastic generation.
Overcoming micro/nanoplastics-induced inhibition in anaerobic digestion: Advances in remediation techniques
This review examines how micro- and nanoplastics inhibit anaerobic digestion performance — reducing biogas yield and organic removal — and surveys remediation strategies including physical, chemical, and biological approaches to overcome their disruptive effects in waste treatment systems.
A review on the recent advances in electrochemical treatment technologies for sludge dewatering and alternative uses
This review examined recent advances in electrochemical treatment technologies for sludge dewatering and alternative uses, highlighting how these methods can address challenges including pathogen removal and microplastic contamination in municipal wastewater sludge.