A preliminary study on the ecotoxic potency of wastewater treatment plant sludge combining passive sampling and bioassays

Ahkola, Heidi; Lindholm‐Lehto, Petra; Perkola, Noora; Välitalo, Pia; Meriläinen, Päivi; Mäenpää, Kimmo; Stelzer, Julio Alberto Alegre; Heiskanen, Ilse; Järvistö, Johanna; Nuutinen, Jari; Leppänen, Matti T.

doi:10.1016/j.scitotenv.2020.143700

Cited by 12 publications

(9 citation statements)

References 95 publications

(149 reference statements)

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“…When 0.6 and 0.8 V external voltages were applied to the MEC-AD reactors, closed external circuits were formed along with electric current output, which might be the reason for the enhancement of sludge disintegration. TCC inhibition on sludge dissolution might be related to the decrease of cell metabolic activity …”

Section: Resultsmentioning

confidence: 99%

“…TCC inhibition on sludge dissolution might be related to the decrease of cell metabolic activity. 14 3.2.2. Hydrolysis, Acidification, and Methanogenesis.…”

Section: Details Of How Tcc Affects the Process Of Mec-admentioning

confidence: 99%

“…In recent years, triclocarban (TCC), as a pharmaceutical and personal care product, has been frequently detected in the environment and rated as one of the top ten contaminants of emerging concern (CEC). − With the massive use of household products, TCC is released and enters wastewater treatment systems, where over 78% of the TCC ends up being concentrated in sludge and is transferred to sludge treatment systems. , According to a study, TCC in sludge could reach 441 mg/kg . As a biocide and endocrine disruptor, TCC has cytotoxic and genotoxic effects on functional microorganisms in AD systems, leading to volatile fatty acid (VFA) accumulation and methanogenesis reduction. − Electrochemical stimulation could facilitate the degradation of chloramphenicol and methanogenic activity in anaerobic systems by selecting dechlorination bacteria and fermentative bacteria carrying antibiotic-resistant genes . This inspires the hypothesis that it might be possible for MEC-AD to resist TCC inhibition on methane production from sludge.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mitigation of Triclocarban Inhibition in Microbial Electrolysis Cell-Assisted Anaerobic Digestion

Long,

Liu,

Xiao

et al. 2024

Environ. Sci. Technol.

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Triclocarban (TCC), as a widely used antimicrobial agent, is accumulated in waste activated sludge at a high level and inhibits the subsequent anaerobic digestion of sludge. This study, for the first time, investigated the effectiveness of microbial electrolysis cell-assisted anaerobic digestion (MEC-AD) in mitigating the inhibition of TCC to methane production. Experimental results showed that 20 mg/L TCC inhibited sludge disintegration, hydrolysis, acidogenesis, and methanogenesis processes and finally reduced methane production from traditional sludge anaerobic digestion by 19.1%. Molecular docking revealed the potential inactivation of binding of TCC to key enzymes in these processes. However, MEC-AD with 0.6 and 0.8 V external voltages achieved much higher methane production and controlled the TCC inhibition to less than 5.8%. TCC in the MEC-AD systems was adsorbed by humic substances and degraded to dichlorocarbanilide, leading to a certain detoxification effect. Methanogenic activities were increased in MEC-AD systems, accompanied by complete VFA consumption. Moreover, the applied voltage promoted cell apoptosis and sludge disintegration to release biodegradable organics. Metagenomic analysis revealed that the applied voltage increased the resistance of electrode biofilms to TCC by enriching functional microorganisms (syntrophic VFA-oxidizing and electroactive bacteria and hydrogenotrophic methanogens), acidification and methanogenesis pathways, multidrug efflux pumps, and SOS response.

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Section: Resultsmentioning

confidence: 99%

“…TCC inhibition on sludge dissolution might be related to the decrease of cell metabolic activity. 14 3.2.2. Hydrolysis, Acidification, and Methanogenesis.…”

Section: Details Of How Tcc Affects the Process Of Mec-admentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mitigation of Triclocarban Inhibition in Microbial Electrolysis Cell-Assisted Anaerobic Digestion

Long,

Liu,

Xiao

et al. 2024

Environ. Sci. Technol.

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“…In the case of bacteria, the umuC and Ames tests emerged as the most frequently employed methods [ 35 , 58 , 69 , 94 ]. Notably, our observations indicate that the umuC test demonstrated greater efficiency compared to the Ames test.…”

Section: Introductionmentioning

confidence: 99%

Multi-taxon trends and the application of genotoxic biomarkers in the analysis of effluents from sewage treatment plant

Freitas,

Benvindo-Souza,

Vieira

et al. 2023

Heliyon

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“…The removal of numerous pollutants produced by agriculture, industry, and households is important for the protection of natural ecosystems and human health. Wastewater treatment plants (WWTPs) employ a series of mechanical and biological processes that convert contaminated water into a sufficiently clean state through a series of steps removing different types of organic and inorganic pollutants 1 , 2 . Typically, wastewater treatment in large facilities takes place in three stages.…”

Section: Introductionmentioning

confidence: 99%

The structure of microbial communities of activated sludge of large-scale wastewater treatment plants in the city of Moscow

Begmatov

Дорофеев

Kadnikov

et al. 2022

Sci Rep

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Microbial communities in wastewater treatment plants (WWTPs) play a key role in water purification. Microbial communities of activated sludge (AS) vary extensively based on plant operating technology, influent characteristics and WWTP capacity. In this study we performed 16S rRNA gene profiling of AS at nine large-scale WWTPs responsible for the treatment of municipal sewage from the city of Moscow, Russia. Two plants employed conventional aerobic process, one plant—nitrification/denitrification technology, and six plants were operated with the University of Cape Town (UCT) anaerobic/anoxic/oxic process. Microbial communities were impacted by the technology and dominated by the Proteobacteria, Bacteroidota and Actinobacteriota. WWTPs employing the UCT process enabled efficient removal of not only organic matter, but also nitrogen and phosphorus, consistently with the high content of ammonia-oxidizing Nitrosomonas sp. and phosphate-accumulating bacteria. The latter group was represented by Candidatus Accumulibacter, Tetrasphaera sp. and denitrifiers. Co-occurrence network analysis provided information on key hub microorganisms in AS, which may be targeted for manipulating the AS stability and performance. Comparison of AS communities from WWTPs in Moscow and worldwide revealed that Moscow samples clustered together indicating that influent characteristics, related to social, cultural and environmental factors, could be more important than a plant operating technology.

show abstract

A preliminary study on the ecotoxic potency of wastewater treatment plant sludge combining passive sampling and bioassays

Cited by 12 publications

References 95 publications

Mitigation of Triclocarban Inhibition in Microbial Electrolysis Cell-Assisted Anaerobic Digestion

Mitigation of Triclocarban Inhibition in Microbial Electrolysis Cell-Assisted Anaerobic Digestion

Multi-taxon trends and the application of genotoxic biomarkers in the analysis of effluents from sewage treatment plant

The structure of microbial communities of activated sludge of large-scale wastewater treatment plants in the city of Moscow

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