Removal of pharmaceuticals from municipal wastewaters at laboratory scale by treatment with activated sludge and biostimulation

Muter, Olga; erkons, Ingus P; Selga, Tūrs; Bērziņš, A.; Gudrā, Dita; Radoviča-Spalviņa, Ilze; Fridmanis, Dāvids; Bartkevičs, Vadims

doi:10.1016/j.scitotenv.2017.01.023

Cited by 54 publications

(21 citation statements)

References 59 publications

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“…Muter et al . 38 confirmed that TTC-DHA is ubiquitous in all intact viable microbial cells and DHA is dependent on the presence of nutrients. So it is possible that ASWs could inhibit the activity of bacteria, even its growth.…”

Section: Resultsmentioning

confidence: 57%

Removal of artificial sweeteners and their effects on microbial communities in sequencing batch reactors

Geng

et al. 2018

Sci Rep

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Concern is growing over contamination of the environment with artificial sweeteners (ASWs) because of their widespread existence in wastewater treatment plants (WWTPs). To evaluate ASWs removal and the effect on activated sludge, acesulfame (ACE), sucralose (SUC), cyclamate (CYC) and saccharin (SAC) were introduced individually or in mixture to sequencing batch reactors (SBRs) in environmentally relevant concentrations (100 ppb) for 100 days. Comparisons between ACE removal in a full-scale WWTP and in lab-scale SBRs were conducted. Results showed that CYC and SAC were completely removed, whereas SUC was persistent. However, ACE removal in lab-scale SBRs was significantly greater than in the full-scale WWTP. In SBRs, chemical oxygen demand (COD), ammonia nitrogen (NH4+-N) and total nitrogen (TN) removal appeared unchanged after adding ASWs (p > 0.05). Adenosine triphosphate (ATP) concentrations and triphenyl tetrazolium chloride-dehydrogenase activity (TTC-DHA) declined significantly (p < 0.05). The mixed ASWs had more evident effects than the individual ASWs. Microbial community analyses revealed that Proteobacteria decreased obviously, while Bacteroidetes, Chloroflexi and Actinobacteria were enriched with the addition of ASWs. Redundancy Analysis (RDA) indicated ACE had a greater impact on activated sludge than the other ASWs.

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Section: Resultsmentioning

confidence: 57%

Removal of artificial sweeteners and their effects on microbial communities in sequencing batch reactors

Geng

et al. 2018

Sci Rep

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“…This phylum constitutes a significant proportion of the microbial communities in aquatic environments and Bacteroidetes members are specialized in the degradation of complex macromolecules. Examples include their high antibiotic multi-resistance (Falcone-Dias et al, 2012; Xiong et al, 2015), their increase in riverine biofilm communities in response to ibuprofen treatment (Lawrence et al, 2005), their dominance in activated sludge (Muter et al, 2017) and in hospital wastewater (Prasertkulsak et al, 2016). An increase of Bacteroidetes in biofilms in a polluted Spanish river, together with a positive correlation with the antibiotic tetracycline has been observed (Proia et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Chemical mixtures and fluorescence in situ hybridization analysis of natural microbial community in the Tiber river

Saccà

Ferrero²,

Loos

et al. 2019

Science of The Total Environment

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The Water Framework Directive (WFD) regulates freshwater and coastal water quality assessment in Europe. Chemical and ecological water quality status is based on measurements of chemical pollutants in water and biota together with other indicators such as temperature, nutrients, species compositions (phytoplankton, microalgae, benthos and fish) and hydromorphological conditions. However, in the current strategy a link between the chemical and the ecological status is missing. In the present WFD, no microbiological indicators are foreseen for integrating the different anthropogenic pressures, including mixtures of chemicals, nutrients and temperature changes, to provide a holistic view of the freshwater ecosystem water quality. The main aim of this work was to evaluate if natural microbial populations can be valuable indicators of multiple stressors (e.g. chemical pollutants, temperature, nutrients etc.) to guide preventive and remediation actions by water authorities. A preliminary survey was conducted to identify four sites reflecting a contamination gradient from the source to the mouth of a river suitable to the objectives of the European Marie Curie project, MicroCoKit. The River Tiber (Italy) was selected as a pilot case study to investigate the correlation between bacteria taxa and the chemical status of the river. The main physicochemical parameters, inorganic elements, organic pollutants and natural microbial community composition were assessed at four selected sites corresponding to pristine, agricultural, industrial and urban areas for three consecutive years. The overall chemical results indicated a correspondence between different groups of contaminants and the main contamination sources at the selected sampling points. Phylogenetic analysis of the microbial community analyzed by Fluorescence In Situ Hybridization method (FISH) revealed differences among the four sampling sites which could reflect an adaptive bacterial response to the different anthropogenic pressures.

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“…Then it can be supposed that the assimilation of compounds 9 and 10 can be due to the presence of hydroxyl groups as a substituent on their imidazole ring, since their presence improves the biodegradability of organic compounds [46,47]. The lower degradation of compound 8 can be attributed to the presence of a steric hindrance between the alcohol group OH and the acid group COOH.…”

Section: By-products Monitoring During the Biological Treatmentmentioning

confidence: 99%

“…Several studies have described that the large volume and the steric effect of the substituents have a negative influence on the biodegradability [45,48]. However, the refractory character of the compounds 5 and 7 can be related to the presence of methyl group as substituent, since the presence of such group increases the persistence of the compounds [46][47][48].…”

Section: By-products Monitoring During the Biological Treatmentmentioning

confidence: 99%

Metronidazole removal by means of a combined system coupling an electro-Fenton process and a conventional biological treatment: By-products monitoring and performance enhancement

Aboudalle

Djelal

Fourcade

et al. 2018

Journal of Hazardous Materials

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In order to mineralize Metronidazole (MTZ), a process coupling an electro-Fenton pretreatment and a biological degradation was implemented. A mono-compartment batch reactor containing a carbon-felt cathode and a platinum anode was employed to carry out the electro-Fenton pretreatment of MTZ. A total degradation of MTZ (100 mg L) was observed at 0.07 mA.cm after only 20 min of electrolysis. Yet, after 1 and 2 h of electrolysis, the mineralization level remained low (16.2% and 32% respectively), guaranteeing a significant residual organic content for further biological treatment. LCMS/MS was used to determine the intermediates by-products and hence to propose a plausible degradation pathway. An increase from 0 to 0.44 and 0.6 for 1 and 2 h of electrolysis was observed for the BOD/COD ratio. Thus, from 1 h of electro-Fenton pretreatment, the electrolysis by-products were considered biodegradable. A biological treatment of the electrolysis by-products after 1 and 2 h was then realized. The mineralization yields reached very close values, about 84% for 1 and 2 h of electrolysis after 504 h of biological treatment, namely close to 89% for the overall process, showing the pertinence of the proposed coupled process.

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Removal of pharmaceuticals from municipal wastewaters at laboratory scale by treatment with activated sludge and biostimulation

Cited by 54 publications

References 59 publications

Removal of artificial sweeteners and their effects on microbial communities in sequencing batch reactors

Removal of artificial sweeteners and their effects on microbial communities in sequencing batch reactors

Chemical mixtures and fluorescence in situ hybridization analysis of natural microbial community in the Tiber river

Metronidazole removal by means of a combined system coupling an electro-Fenton process and a conventional biological treatment: By-products monitoring and performance enhancement

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