title: Air purification from TCE and PCE contamination in a hybrid bioreactors and biofilter integrated system.
abstract: A two-stage waste air treatment system, consisting of hybrid bioreactors (modified bioscrubbers) and a biofilter, was used to treat waste air containing chlorinated ethenes - trichloroethylene (TCE) and tetrachloroethylene (PCE). The bioreactor was operated with loadings in the range 0.46-5.50gm(-3)h(-1) for TCE and 2.16-9.02gm(-3)h(-1) for PCE. The biofilter loadings were in the range 0.1-0.97gm(-3)h(-1) for TCE and 0.2-2.12gm(-3)h(-1) for PCE. Under low pollutant loadings, the efficiency of TCE elimination was 23-25% in the bioreactor and 54-70% in the biofilter. The efficiency of PCE elimination was 44-60% in the bioreactor and 50-75% in the biofilter. The best results for the bioreactor were observed one week after the pollutant loading was increased. However, the process did not stabilize. In the next seven days contaminant removal efficiency, enzymatic activity and biomass content were all diminished.
authors: Warsaw University of Technology, Faculty of Environmental Engineering, Biology Division, Nowowiejska 20, 00-653 Warsaw, Poland. Electronic address: agnieszka.tabernacka@is.pw.edu.pl.
authors: Agnieszka
authors: A
authors: Tabernacka
authors: Warsaw University of Technology, Faculty of Environmental Engineering, Biology Division, Nowowiejska 20, 00-653 Warsaw, Poland.
authors: Ewa
authors: E
authors: Zborowska
authors: Warsaw University of Technology, Faculty of Environmental Engineering, Biology Division, Nowowiejska 20, 00-653 Warsaw, Poland.
authors: Maria
authors: M
authors: Lebkowska
authors: AstraZeneca Pharma Poland Sp. z o.o., Postępu 18, 02-676 Warsaw, Poland.
authors: Maciej
authors: M
authors: Borawski
mesh_terms: D061808:Air Filters; D000393:Air Pollutants / Q000302:isolation & purification*; D019149:Bioreactors; D013750:Tetrachloroethylene / Q000302:isolation & purification*; D014241:Trichloroethylene / Q000302:isolation & purification*
chemical_list: D000393:Air Pollutants; D014241:Trichloroethylene; D013750:Tetrachloroethylene
keywords: Biofilter; Biological waste gas treatment; Bioscrubber; Tetrachloroethene; Trichloroethene