Biopreparation phenoform for the purification of aqueous solutions from phenol and formaldehyde: creation and рerspectives of application
Închide
Articolul precedent
Articolul urmator
361 2
Ultima descărcare din IBN:
2021-06-22 15:10
Căutarea după subiecte
similare conform CZU
579.63:628.35 (2)
Microbiologie aplicată (366)
Tehnică sanitară. Apă. Igienă sanitară. Tehnica iluminatului (286)
SM ISO690:2012
ALIASHKEVICH, Iryna, HLUSHEN, Alena, CHYRYKAVA, Marharyta. Biopreparation phenoform for the purification of aqueous solutions from phenol and formaldehyde: creation and рerspectives of application. In: Biotehnologii moderne - soluții pentru provocările lumii contemporane, 20-21 mai 2021, Chişinău. Chișinău, Republica Moldova: Tipografia "Artpoligraf", 2021, p. 128. ISBN 978-9975-3498-7-1. DOI: https://doi.org/10.52757/imb21.070
EXPORT metadate:
Google Scholar
Crossref
CERIF

DataCite
Dublin Core
Biotehnologii moderne - soluții pentru provocările lumii contemporane 2021
Simpozionul "Simpozion ştiinţific naţional cu participare internaţională: "
Chişinău, Moldova, 20-21 mai 2021

Biopreparation phenoform for the purification of aqueous solutions from phenol and formaldehyde: creation and рerspectives of application

DOI: https://doi.org/10.52757/imb21.070
CZU: 579.63:628.35

Pag. 128-128

Aliashkevich Iryna, Hlushen Alena, Chyrykava Marharyta
 
Institute of Microbiology of the NAS of Belarus
 
Disponibil în IBN: 11 iunie 2021


Rezumat

Phenol and formaldehyde are the major pollutants effluents of chemical, wood-processing, pulp-and-paper industrial processes. Numerous studies on the selection of hyperactive microbial degraders of phenol and formaldehyde proved extremely effective, however, further research aimed at upgrading decomposing potential of new strains, is going on incessantly. The goal of this investigation was the development of superefficient microbial preparation intended for removal of mentioned xenobiotics from wastewaters and absorption solutions entrapping toxic components of industrial ventilation discharges treated in in absorption-biochemical units. We isolated highly active microbial cultures Rhodotorula sp. VFF-1 and Rhodococcus opacus FF 3-1, capable of utilize phenol and formaldehyde contaminants as the sole carbon source in concentrations under 0.5%. Strain Rhodotorula sp. VFF-1 was distinguished by more intense consumption of formaldehyde rather than phenol. In contrast, Rhodococcus opacus FF 3-1 culture shoved preference to phenol instead of formaldehyde substrate. The collection data led us to assume that concerted impact of active phenol degrader Rhodococcus opacus FF 3-1 and formaldehyde consumer Rhodotorula sp. VFF-1 integrated into the same microbial preparation will provide synergistic effect in regard to both xenobiotics. As a result two strains laid the basis of biopreparation PhenoForm. Its efficiency trials demonstrated that formaldehyde in concentration of 500 mg/l was not detected in the samples following 120 hours of study, since phenol and at equivalent contamination level vanished by 198 hours of the study. Since phenol and formaldehyde often find joint use in industrial processes, absorption solutions and effluents, as a rule, carry the dual charge of the pollutants. Application of PhenoForm ensured complete decontamination of test solutions containing 500 mg/l charge of the toxicants (250 mg/l of each substance) in 144 hours. Generally, absorption solutions display complicated composition and comprise, apart from phenol and formaldehyde, satellite compounds, like ammonia, acetaldehyde, and suspended substances. Comparing data on regeneration of solutions containing only the binary mixture of phenol and formaldehyde with data on treatment of multicomponent wastewater, it was revealed that accompanying agents considerably inhibited formaldehyde utilization rate, as opposed to phenol substation, where they accelerated to some extent its microbial break-down. Large-scale PhenoForm testing to recover performance of absorption-biochemical units recuperating ventilation air at industrial plants in Belarus and Russia proved to excellent 85-96% phenol and formaldehyde disposal effect for complex multicomponent aqueous solutions pollutant loads up to 1 g/l. The microbial preparation was also engaged to decontaminate effluents of pulpandpaper mill. The introduced microorganisms secured stability in performance of biological treatment network even at massive input levels and shocking concentrations of toxicants, stepped up oxidation power of activated sludge and in the long run raised general productivity of detoxification facilities. Efficiency of phenol disposal in effluents reached 90-99%, formaldehyde removal – 6396% depending on the input concentrations of the toxicants. The developed microbial preparation PhenoForm may be successfully applied at chemical, wood-processing and pulp-and-paper plants for biological treatment of industrial discharges polluted with phenol, formaldehyde and mixtures thereof.