Bioaugmentation with immobilized endophytic Penicillium restrictum to improve quorum quenching activity for biofouling control in an aerobic hollow-fiber membrane bioreactor treating antibiotic-containing wastewater


Fakhri H., Shahi A., Övez S., Aydin S.

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, vol.210, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 210
  • Publication Date: 2021
  • Doi Number: 10.1016/j.ecoenv.2020.111831
  • Journal Name: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, BIOSIS, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, EMBASE, Environment Index, Food Science & Technology Abstracts, Geobase, Greenfile, MEDLINE, Metadex, Pollution Abstracts, Veterinary Science Database, Directory of Open Access Journals, Civil Engineering Abstracts
  • Keywords: Hollow-fiber membrane bioreactor, Antibiotics, Penicillium restrictum, Biofouling, Quorum quenching, ACTIVATED-SLUDGE, MICROBIAL COMMUNITY, RESISTANCE GENES, REMOVAL, TETRACYCLINE, BACTERIAL, FUNGI, PHARMACEUTICALS, BIOCONVERSION, PRODUCTS
  • Istanbul Technical University Affiliated: Yes

Abstract

The effects of bioaugmentation with immobilized Penicillium restrictum on the removal efficiency of sulfamethoxazole (SMX), erythromycin (ERY) and tetracycline (TC) antibiotics as well as membrane biofouling was studied using hollow-fiber membrane bioreactor (HF-MBR). Bioaugmentation with P. restrictum led to a significant change in the antibiotic removal efficiency and relative abundance of aerobic microbial community, most probably as a result of its quorum quenching activity. Furthermore, in addition to its role in the increase of SMX and ERY removal efficiencies and the decrease of their sorption on solid phase, bioaugmentation significantly reduced the transmembrane pressure which in turn reduced membrane clogging. The most abundant phyla in sludge and biofilm samples in the presence of P. restrictum were observed to be Proteobacteria, Bacteroidetes and Firmicutes. Differences in bacterial compositions and their specificity in biodegradation of antibiotics in different reactors showed that bacteria were specifically selected under the pressure of antibiotics and growing fungus.