scholarly journals Assessment of Trametes versicolor, Isochrysis galbana, and Purple Phototrophic Bacteria for the Removal of Pharmaceutical Compounds in Hospital Wastewater

2021 ◽  
Vol 02 (04) ◽  
pp. 1-1
Author(s):  
Ana Cruz del Álamo ◽  
◽  
María Isabel Pariente ◽  
Alejandra Sanchez-Bayo ◽  
Daniel Puyol ◽  
...  
Keyword(s):  
Mixed Culture ◽  
Environmental Risk ◽  
Trametes Versicolor ◽  
Total Concentration ◽  
Isochrysis Galbana ◽  
Pharmaceutical Compounds ◽  
Phototrophic Bacteria ◽  
White Rot ◽  
White Rot Fungus ◽  
Hospital Wastewater

Hospitals are one of the key contributors of pharmaceutical contaminants of emerging concern to the sewer systems. Hospitals wastewaters contain concentrations of pharmaceutical compounds between 3 and 150, which are higher than urban wastewater streams. However, dedicated treatments of the hospital effluents before discharge to the sewer system are not compulsory. Besides, conventional wastewater treatment plants have not been designed to remove pharmaceutical compounds effectively, and consequently, these micropollutants can reach the aquatic ecosystems. The removal of pharmaceutical compounds in real hospital wastewater was gaged using three different microbial cultures (white rot-fungus Trametes versicolor, microalga Isochrysis galbana, and a mixed culture of non-sulfur purple phototrophic bacteria). Before and after bioassays of the hospital wastewater, environmental hazard quotients were used to evaluate the biological treatment efficiency. Up to 45 out of the 79 compounds included in the analytical method were noticed in the hospital wastewater, with a predominance of analgesics/anti-inflammatories (acetaminophen, ibuprofen, ketoprofen, and naproxen). It was followed by antibiotics (azithromycin, ciprofloxacin, and ofloxacin, out of which the first two are included in the watch list of substances for monitoring in water in 2020) and anti-hypertensive drugs. Isochrysis galbana reached a reduction of 45% of the total concentration of pharmaceuticals, whereas Trametes versicolor and mixed culture of purple phototrophic bacteria improved the reductions up to 69% and 76%, respectively. Moreover, potential environmental risk compounds (antibiotics, particularly ciprofloxacin and ofloxacin) were removed by Trametes versicolor in higher extension, obtaining a total hazard quotient reduction higher than the other two cultures. Removal efficiency and environmental risk assessment of remaining PhACs were used to evaluate the performance of the new biological systems for the treatment of emerging pollutants. According to both criteria, T. versicolor seems the most capable alternative for removing pharmaceutical compounds in hospital wastewater effluents.

scholarly journals Evaluation and identification of walnut heartwood extractives for protection of poplar wood

BioResources ◽  
2010 ◽  
Vol 6 (1) ◽  
pp. 59-69
Author(s):  
Seyyed Khalil Hosseini Hashemi ◽  
Ahmad Jahan Latibari
Keyword(s):  
Weight Loss ◽  
Trametes Versicolor ◽  
Juglans Regia ◽  
White Rot ◽  
White Rot Fungus ◽  
Poplar Wood ◽  
Vacuum Desiccator ◽  
Highest Weight ◽  
Complete Saturation ◽  
Heartwood Extractives

Walnut (Juglans regia L.) heartwood extractives were identified and their potential for protection of poplar wood was evaluated. Test specimens were prepared from poplar wood (Populus nigra L.) to meet BS 838:1961 requirements. Samples were impregnated with heartwood extractive solution (1.5, 2.5, and 3.5% w/w in ethanol-toluene), followed by 5 hours vacuum desiccator technique to reach complete saturation. Impregnated specimens were exposed to white-rot fungus (Trametes versicolor) for 14 weeks according to BS 838:1961 applying the kolle-flask method. The weight loss of samples was determined after exposure to white-rot fungus. The highest weight loss (36.96%) was observed for untreated control samples and the lowest weight loss (30.40%) was measured in samples treated with 1.5% extractives solution. The analyses of the extracts using GC/MS indicated that major constituents are benzoic acid,3,4,5-tri(hydroxyl) and gallic acid (44.57 %). The two toxic components in the heartwood are juglone (5.15 %) and 2,7-dimethylphenantheren (5.81 %).

Biological resistance of nanoclay-treated plastic composites with different bamboo contents to three types of fungi

2019 ◽  
Vol 33 (8) ◽  
pp. 1048-1060 ◽  
Author(s):  
Hamid R Taghiyari ◽  
Ehsan Bari ◽  
Asghar Sistani ◽  
Mohammad Najafian ◽  
Mohammad Ali Tajick Ghanbary ◽  
...  
Keyword(s):  
Mass Loss ◽  
Trametes Versicolor ◽  
Soft Rot ◽  
White Rot ◽  
White Rot Fungus ◽  
European Standard ◽  
Plastic Composites ◽  
Mass Losses ◽  
Injection Molded ◽  
Synthetic Matrix

The present study investigated the effects of exposure of bamboo–plastic composites to three aggressive fungi species on mass loss values. Polyvinyl chloride was used as the synthetic matrix of the composite. Three mixing combinations were used for bamboo–polymer composites, namely 40/60, 50/50, and 60/40. The injection-molded process was employed to produce the composites. Specimens were prepared according to modified European standard specifications (EN-113) to be exposed to white-, brown-, and soft-rot fungi each month for 4 months. The results indicated that the soft-rot fungus ( Chaetomium globosum) generally caused higher mass losses in all bamboo/plastic combination ratios. Brown- and soft-rot fungi demonstrated different mass losses on different combination ratios. However, the white-rot fungus ( Trametes versicolor) caused nearly the same mass losses on all three combination ratios. Moreover, T. versicolor was highly significant with respect to mass loss and moisture content. It can therefore be concluded that the T. versicolor has a different decay metabolism when compared to the brown- and soft-rot fungus used in this study.

Synthesis and characterization of immobilized white-rot fungus Trametes versicolor in sol–gel ceramics

2015 ◽  
Vol 77 (1) ◽  
pp. 28-38 ◽  
Author(s):  
Wan Nurul Izyani Wan Mohd Zawawi ◽  
Azmi Fadziyana Mansor ◽  
Nurul Sakinah Othman ◽  
Nur Atikah Mohidem ◽  
Nik Ahmad Nizam Nik Malek ◽  
...  
Keyword(s):  
Trametes Versicolor ◽  
Sol Gel ◽  
White Rot ◽  
White Rot Fungus ◽  
Synthesis And Characterization

Quantification of fungal colonization in modified wood: Quantitative real-time PCR as a tool for studies on Trametes versicolor

Holzforschung ◽  
2010 ◽  
Vol 64 (5) ◽  
Author(s):  
Annica Pilgård ◽  
Gry Alfredsen ◽  
Ari Hietala
Keyword(s):  
Real Time ◽  
Trametes Versicolor ◽  
Growth Period ◽  
Hyphal Growth ◽  
Growth Patterns ◽  
White Rot ◽  
White Rot Fungus ◽  
Fungal Colonization ◽  
Wood Preservatives ◽  
Fungal Dna

Abstract Traditional wood preservatives based on biocides are effective against wood-deteriorating organisms because of their toxicity. By contrast, modified woods are non-toxic by definition. To investigate the efficiency of various wood modifications, quantitative real-time polymerase chain reaction (qPCR) was used to profile the DNA amounts of the white-rot fungus Trametes versicolor (L.) [Lloyd strain CTB 863 A] during an 8-week-long growth period in treated Pinus sylvestris (L.) sapwood. The studied wood was modified by acetylation, furfurylation, and thermal treatment. The traditional wood preservatives bis-(N-cyclohexyldiazeniumdioxy)-copper (Cu-HDO) and chromated copper arsenate (CCA) were used as references, whereas untreated P. sylvestris (L.) sapwood served as a control. The maximum levels of fungal DNA in native wood occurred at the end of the experiment. For all wood treatments, the maximum fungal DNA level was recorded after an incubation period of 2 weeks, followed by a decline until the end of the trial. For the preservative-treated woods, Cu-HDO showed the lowest level of fungal DNA throughout the experiment, indicating that exploratory hyphal growth is limited owing to the phytotoxicity of the treatment. The other treatments did not inhibit the exploratory hyphal growth phase. We conclude that qPCR studies of hyphal growth patterns within wood should provide a powerful tool for evaluating and further optimizing new wood protection systems.

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