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This study uses microbial methods to research the influence of oxygen (O2) content on the removal efficiency of sulfur dioxide (SO2) and nitrogen oxides (NOx) in a tandem twin-towers desulfurization and denitrification process system. Oxygen can play a significant role in biotrickling towers. Other important factors had already been optimized prior to the study, including inlet concentration, gas...
NOx is one of major air pollutants which cause acid rain. Bacterial population composition of biofilms in biotricking filter is analyzed with one culture-independent method by PCR-DGGE. It has been found that Nitrobacter sp., Acinetobacter sp., Thermomonas sp. and Chloroflexus sp.are the dominant species of biofilms. Nitrobacteria are the primary bacteria which oxidize NOx into NO3−. Autotrophic bacterium...
The effect of sodium sulfite on improving the purification efficiency of formaldehyde waste gas in a bio-trickling filter was investigated. In the study, 0.05 M sodium sulfite was added in the trickling liquid. The results showed that sodium sulfite efficiently removed the formaldehyde that was solved in the trickling liquid. The removal efficiencies were high up to 98.9%. The apparent slow bio-reaction...
Cyanoethylated secondary fiber (CSF) were made from secondary fiber(SF) cyanoethylation, and the effect of cyanoethylation on SF and CSF/RHDPE composites were investigated. The reinforcing mechanism of CSF in composites was discussed. Compared with unmodifed fiber, modifed fiber improved interfacial compatibility between CSF and RHDPE, and resulted in enhancing the mechanical properties of CSF/RHDPE...
The biodegradable composites made from secondary flber(SF) and cyanoethylated secondary flber(CSF) were prepared by press forming, and the effect of alkali pretreatment and combined pretreatment of alkali and silane coupling agent KH550 on secondary fiber and composites were investigated. The optimum content of SF is 10 wt% because the hot melt viscosity of CSF was higher than that of traditional...
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