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20 resultsShowing papers similar to Impacts of Microplastics on Anammox Systems: A Comprehensive Review of Mechanisms and Influences
ClearA review of microplastics on anammox: Influences and mechanisms
This review summarizes how microplastics affect anammox, a key biological process used in wastewater treatment to remove nitrogen. Microplastics disrupt the microbial communities that perform this process, reducing treatment efficiency depending on plastic concentration, size, and type. Since wastewater treatment is a critical barrier preventing pollutants from reaching drinking water sources, any reduction in treatment performance could increase human exposure to contaminants.
Effects of Microplastics on Nitrogen Removal Performance of Enriched Anammox Cultures
Researchers tested whether polyethylene and polypropylene microplastics affect anammox, a key biological nitrogen removal process used in wastewater treatment. They found that the physical particles themselves did not significantly inhibit the process, but chemical compounds leaching from the plastics, particularly the plasticizer dibutyl phthalate, caused temporary inhibition. Systems using granular or attached biomass structures showed better resilience to these chemical effects than suspended growth systems.
Inhibition of anammox activity by municipal and industrial wastewater pollutants: A review
This review compiles research on how various wastewater pollutants, including microplastics and emerging contaminants, inhibit anammox bacteria used for nitrogen removal in water treatment. Researchers found that pollutant type, concentration, and exposure duration all influence the degree of inhibition, potentially reducing treatment efficiency. The study highlights the importance of understanding pollutant interactions with biological treatment processes as new contaminants continue to appear in wastewater.
Deciphering anammox response characteristics and potential mechanisms to polyethylene terephthalate microplastic exposure
This study tested how PET microplastics affect the bacteria used in wastewater treatment for removing nitrogen pollutants. Long-term exposure to high concentrations of PET microplastics reduced the nitrogen removal efficiency by nearly 29%, though the system partially recovered over three months. The findings matter because compromised wastewater treatment means more pollutants could end up in waterways that supply drinking water.
Insight into response characteristics and inhibition mechanisms of anammox granular sludge to polyethylene terephthalate microplastics exposure
This study tested how PET microplastics affect the anammox process, a key biological method used in wastewater treatment to remove nitrogen. At higher concentrations, PET particles reduced treatment efficiency by about 16% and weakened the structure of the bacterial granules that perform the process. The findings matter because microplastics in sewage could impair the very systems designed to clean our wastewater.
How anammox responds to the emerging contaminants: Status and mechanisms
This review synthesizes research on how emerging contaminants including antibiotics, nanomaterials, heavy metals, and microplastics affect anammox bacteria used in wastewater nitrogen removal, identifying inhibition thresholds and possible recovery mechanisms.
Insights into combined stress mechanisms of microplastics and antibiotics on anammox: A critical review
This review examines how microplastics and antibiotics together affect anammox bacteria, which are important for removing nitrogen from wastewater. Researchers found that combined exposure disrupts the bacteria through oxidative stress, cell membrane damage, and interference with key enzymes, often more severely than either pollutant alone. The study highlights that microplastic and antibiotic contamination in wastewater could undermine biological treatment processes.
Unveiling the plastisphere in anammox process: Physicochemical evolution of microplastics and microbial succession dynamics
Researchers tracked how polyethylene terephthalate microplastics change physically and chemically over 30 days in an anaerobic wastewater treatment system. They found that while the microplastics had minimal impact on nitrogen removal efficiency, they developed distinct microbial communities on their surfaces that evolved over time. The study provides new insights into how microplastics interact with beneficial microbes in wastewater treatment processes.
Study on acute exposure of polyethylene terephthalate microplastics on the performance of anammox granular sludge
Researchers studied how short-term exposure to PET microplastics of different sizes affects the performance of anaerobic ammonia-oxidizing (anammox) bacteria used in wastewater treatment. Surprisingly, acute exposure to PET microplastics actually promoted the denitrification rate of the reactor and increased the activity of key enzymes. The findings suggest that brief microplastic exposure may temporarily boost certain biological wastewater treatment processes, though long-term effects remain unknown.
Mechanisms of inhibition and recovery under multi-antibiotic stress in anammox: A critical review
This review examines how antibiotics, alongside other emerging pollutants like microplastics and nanomaterials, inhibit the anammox process used in wastewater treatment for nitrogen removal. The researchers detail multiple mechanisms by which antibiotics disrupt these specialized bacteria, including damage to cell membranes, enzyme inhibition, and interference with key metabolic pathways. Understanding these mechanisms is important for developing strategies to maintain effective wastewater treatment in the face of increasing antibiotic contamination.
System-dependent effects and mechanisms of microplastics/nanoplastics on nitrogen and phosphorus removal from wastewater treatment and N2O emission
Researchers reviewed the system-dependent effects of microplastics and nanoplastics on nitrogen and phosphorus removal efficiency across various wastewater treatment systems, including activated sludge, constructed wetlands, and membrane bioreactors. The study found that these plastic particles also impact nitrous oxide emissions, with effects varying significantly depending on the treatment technology used.
Insight into effect of polyethylene microplastic on nitrogen removal in moving bed biofilm reactor: Focusing on microbial community and species interactions
Researchers studied how polyethylene microplastics affect nitrogen removal in wastewater treatment bioreactors and found that low concentrations slightly improved the process, while higher concentrations disrupted it. The microplastics changed the microbial communities responsible for breaking down nitrogen in wastewater. This matters because less effective wastewater treatment means more nitrogen pollution in waterways, and microplastics entering treatment plants could reduce their ability to clean water effectively.
Microplastics and anammox: Unravelling the hidden threats to nitrogen cycling and microbial resilience
This review examined how microplastics disrupt nitrogen cycling in soil by interfering with specialized bacteria that remove nitrogen from the environment. Researchers found that microplastics alter microbial habitats, destabilize bacterial communities, and attract heavy metals that further inhibit these essential soil processes, with effects varying based on soil acidity and organic matter content.
Polystyrene nanoparticles regulate microbial stress response and cold adaptation in mainstream anammox process at low temperature
Researchers found that polystyrene nanoplastics at concentrations above 0.5 mg/L significantly impair nitrogen removal by anammox bacteria (microbes that convert ammonia to nitrogen gas) in wastewater treatment, with nanoplastics inducing oxidative stress, damaging cell membranes, and binding to cold-shock proteins that are critical for low-temperature bacterial performance.
Mechanisms underlying the detrimental impact of micro(nano)plastics on the stability of aerobic granular sludge: Interactions between micro(nano)plastics and extracellular polymeric substances
Researchers found that both micro- and nanoplastics at realistic concentrations harmed the performance of aerobic granular sludge, a technology used for wastewater treatment, by reducing its ability to remove nitrogen. The plastic particles interacted with the sticky substances that hold the sludge granules together, weakening their structural integrity. The study reveals a specific mechanism by which plastic pollution can undermine wastewater treatment systems that communities rely on for clean water.
Effects of microplastics accumulation on performance of membrane bioreactor for wastewater treatment
Researchers simulated the long-term accumulation of polypropylene microplastics in membrane bioreactors used for wastewater treatment. They found that while microplastic accumulation did not reduce the removal of key pollutants like COD and ammonia nitrogen, it did increase membrane fouling and alter the composition of microbial communities in the reactor. The study suggests that microplastic buildup in wastewater treatment systems may affect operational efficiency over time.
A review of microplastics stress on nitrogen conversion and nitrous oxide emissions from biological wastewater treatment: Efficiency, mechanism and prospects
This review analyzes how microplastics affect nitrogen conversion processes and nitrous oxide emissions during biological wastewater treatment. Researchers found that microplastics can disrupt key nitrogen-cycling steps including nitrification and denitrification, potentially increasing emissions of the potent greenhouse gas nitrous oxide. The study highlights the dual environmental concern of microplastics interfering with both water treatment efficiency and climate-relevant gas emissions.
The impact of microplastics and nanoplastics on biological nitrogen removal processes: Exacerbating the greenhouse effect
This review examines how microplastics and nanoplastics accumulate in wastewater treatment plants and interfere with the biological processes that remove nitrogen from water. The disruption leads to increased emissions of nitrous oxide, a powerful greenhouse gas, making the problem both an environmental health concern and a climate issue. The findings suggest that microplastic contamination in wastewater is undermining treatment effectiveness while simultaneously contributing to global warming.
Impact of polyethylene microplastics on the nitrogen removal and bacterial community in sequencing batch reactor at different hydraulic retention times
Researchers examined how polyethylene microplastics affect nitrogen removal performance in biological wastewater treatment at different hydraulic retention times. The study found that the presence of microplastics amplified the negative effects of shortened treatment times on nitrogen removal efficiency and altered bacterial communities and enzyme levels involved in nitrification and denitrification, offering new insights into how microplastics interfere with wastewater treatment processes.
Effect evaluation of microplastics on activated sludge nitrification and denitrification
Researchers found that microplastics entering wastewater treatment plants interfere with the nitrification and denitrification processes carried out by activated sludge microbes, potentially reducing the effectiveness of nutrient removal in sewage treatment. This effect could undermine water quality if microplastic loads in wastewater continue to increase.