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Biotrickling filter is a kind of effective equipment used for purifying waste gases, its performance is affected by many factors. This research aimed at investigating the biodegradation of phenol contaminated-air streams in biotrickling filter. The effects of various experimental parameters such as solution pH, empty bed contact time(EBCT), initial phenol concentration and micro-organisms for de-phenol...
To improve the photocatalytic application performances of TiO 2 , in this work, firstly CdS modified Degussa P25 TiO 2 (CdS/TiO 2 ) composites were prepared by two methods, sol–gel method and precipitation method. Next they, sol–gel-CdS/TiO 2 (sg-CdS/TiO 2 ) and precipitation-CdS/TiO 2 (pp-CdS/TiO 2 ), were loaded on activated carbon fibers (ACFs)...
In the present study, a new bacterial strain isolated from activated sludge has been identified as Lysinibacillus sphaericus based on its morphology, physiochemical properties, and the results of 16S ribosomal RNA (rRNA) gene sequence analysis. This new bacterial strain uses ethanethiol as both carbon source and energy source. The key factors for controlling the degradation efficiency of ethanethiol...
The aim of this work was to research the preparation of eco-cementing material in utilization of high-volume steel slag and granulated blast-furnace slag (GBFS) adding with appropriate amount of semidry flue gas desulphurization (SFGD) ash. The two factors ,specific surface area and SFGD ash content, which influence the mechanical properties of cement were also deeply discussed. The results show that...
Leaching of six elements-namely, Cu, Zn, Pb, Cd, Ni, and F from two semidry flue gas desulfurization ash samples and one waste gypsum sample collected from two different iron and steel plants and one power plant in Hebei, has been reported. Various extracting agents were used to conduct leaching experiments for desulfurization ashes. The dissolution of trace elements contained in the ashes were determined...
The present study is focused on clarifying the influence of semidry flue gas desulfurization (SFGD) ash in replacing natural gypsum (NG) in the production of ordinary Portland cement (OPC). Clinker, 3 wt% of Slag and 6-12 wt% of modified SFGD ash were ground in a laboratory ball mill to produce cement. The properties of SFGD ash were investigated via chemical composition analysis, Scanning electron...
Some samples of ash were taken from a Semi-dry FGD dealing with sinter gas which was released from iron industry. Scanning electron microscope (SEM), X-ray diffraction (XRD) and Fourier Transform Infrared Spectrometer (FTIR) were employed to identify the samples in order to investigate their physical and chemical characteristics. The result shows that: this kinds of semi-dry FGD ash is stable, and...
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