We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Impact of cellulosic fibre microplastics on aerobic granular sludge in dyeing wastewater treatment
AI summary Read the abstract
Researchers tested the effects of cellulosic fiber microplastics from the dyeing industry on aerobic granular sludge wastewater treatment, finding that concentrations above 20 mg/L impair nutrient removal, destabilize granule structure, and reshape microbial communities — identifying a concentration threshold for safe system operation.
Aerobic granular sludge(AGS), characterized by high biological retention capacity and environmental stress resistance, has emerged as a frontier technology for dyeing wastewater treatment. However, the impact of cellulosic fibre microplastics(CFMPs), a typical contaminant in the dyeing industry, on the pollutant removal efficiency of AGS and the underlying mechanisms remain unclear. This study systematically investigated the gradient effects of CFMPs at 0-50 mg/L on AGS for the first time, revealing differential mechanisms based on the interaction between extracellular polymeric substances(EPS) and microbial communities. The results showed that the effect of CFMPs on AGS was concentration-dependent: the system remained stable with no significant change in pollutant removal efficiency at ≤5 mg/L. When the concentration exceeded 20 mg/L, AGS exhibited decreased removal capacities for chemical oxygen demand(COD), total nitrogen(TN), and total phosphorus(TP), with removal rates dropping to 81.6%,60.6%, and 81.3% respectively at 50 mg/L. Mechanistic analysis indicated that high-concentration CFMPs induced defensive stress in AGS through physical interference, leading to 32%-58% increase in EPS content compared to the control group. The imbalance between protein(PN) and polysaccharide(PS) in EPS exacerbated granular structure loosening. Meanwhile, the microbial community structure was significantly reconstructed, with reduced abundances of functional bacteria such as Proteobacteria and Bacteroidota, directly hindering metabolic pathways. This study for the first time confirmed the “low-concentration compatibility-high-concentration antagonism” effect of CFMPs on AGS,provided concentration control thresholds and microbial regulation strategies for the treatment of dyeing wastewater containing CFMPs, and improves the theoretical system of microplastic pollution control.
More Papers Like This
Effects and Fate of Microfibres on Wastewater Treatment: Insights into Treatment Performance, Microbiome Selection and Synergetic Impacts on Functional Organisms in Granular Sludge Reactors
AI summary Read the abstract
Researchers examined the effects of polyester and denim microfibres on aerobic granular sludge reactors used in wastewater treatment, finding that fibre presence influences treatment performance, microbiome community composition, and the function of key organisms in the granular sludge. The findings reveal that textile microfibres reaching wastewater plants can have synergistic negative impacts on biological treatment processes.
Effects and fate of microfibres on wastewater treatment: Insights into treatment performance, microbiome selection and synergetic impacts on functional organisms in granular sludge reactors
AI summary Read the abstract
Researchers investigated the effects of denim and polyester microfibres on aerobic granular sludge reactor performance, examining how these commonly encountered anthropogenic fibres influence wastewater treatment efficiency, microbiome selection, and interactions with functional organisms.
Effects and fate of microfibres on wastewater treatment: Insights into treatment performance, microbiome selection and synergetic impacts on functional organisms in granular sludge reactors
AI summary Read the abstract
Researchers investigated the effects of denim and polyester microfibres on the performance of aerobic granular sludge wastewater treatment reactors, examining impacts on treatment efficiency, microbiome composition, and synergistic effects on functional microbial organisms.
Response of aerobic granular sludge under polyethylene microplastics stress: Physicochemical properties, decontamination performance, and microbial community
AI summary Read the abstract
Researchers investigated the impact of polyethylene microplastics on aerobic granular sludge used in wastewater treatment. The study found that microplastics significantly disrupted sludge structure, settling properties, and enzyme activities related to denitrification and phosphorus removal, with increased reactive oxygen species and cell membrane damage at higher concentrations.
Response of aerobic granular sludge under acute inhibition by polystyrene microplastics: Activity, aggregation performance, and microbial analysis
AI summary Read the abstract
Researchers investigated how different concentrations of polystyrene microplastics affect the performance of aerobic granular sludge used in wastewater treatment. The study found that increasing microplastic concentrations inhibited nitrogen removal rates and disrupted the microbial community structure within the sludge. Evidence indicates that microplastic contamination in wastewater can compromise the effectiveness of biological treatment processes.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.