Research on Influencing Factors of Biological Filtration Tower Treating Toluene Gas

2017 International Conference on Environmental and Energy Engineering

生态环境科学;能源学

Zhang, Changping^1 ; Cao, Ziqing^1 ; Lu, Yuqi^1 ; Du, Linggai^1

School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, China^1

关键词: Antibiotic concentration;    Biological filtration;    Key influencing factors;    Nitrogen sources;    Optimal combination;    Orthogonal experimental design;    Outlet concentration;    Removal efficiencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/63/1/012020/pdf
DOI  :  10.1088/1755-1315/63/1/012020

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Through the orthogonal experimental design, the optimal combination of Triton X-100, nitrogen source, Fe2+, temperature, concentration of antibiotics, pH and spray quantity was determined with surfactants, nitrogen and iron elements as additive, by which the key influencing factors were determined. In the test, the removal efficiency of the second groups was higher than that of the eighth groups, which were 89% and 87%, respectively. The best combination of a group of removal was as follows: nitrogen source concentration was 2 g •L-1, antibiotic concentration was 300 U•mL-1, the concentration of Triton X-100 was 0.05 mL•L-1, Fe2+concentration was 14 mL•L-1, pH was 7, the temperature was 34°C, spray amount was 6 L •h-1. The antibiotic concentration was the most important factor on the removal efficiency of the toluene. The concentration of gas in each layer of toluene was detected; the curve of the outlet concentration in the optimal combination and the average state was obtained. The removal efficiency of the optimal combination was much better than the average, and it was found that the removal rate decreased with the increase of the height of the filling layer. The change of oxygen content in each layer was detected which was no significant change. It showed that oxygen was not the limiting factor of the removal of toluene by microorganisms. Keywords: surfactants; biological filtration tower; toluene; orthogonal test.