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A photo-catalytic reactor for degrading volatile organic compounds(VOCs)in paper mill environment

Journal of Bioresources and Bioproducts 2018年第2期3卷 78-83页

作者： Jun Ma Xin Tong Zhenbin Zhang Xiaoquan Chen Wenhao Shen State Key Laboratory of Pulp and paper Engineering South China University of Technology Guangzhou510640China

Volatile organic pollutants such as benzene and formaldehyde are commonly detected in the ambient air of paper *** remove these pollutants from the air,a photo-catalytic reactor was developed in this *** reactor had a series of honeycomb aluminum meshes coated with nanosized titanium dioxide as the catalyst for the degradation reactions of gaseous *** formaldehyde and benzene could be completely degraded in the ***,the degrading time for benzene was much longer than that for formaldehyde,and the degradation rate of benzene decreased with increasing initial benzene *** was found that the reaction pathway for formaldehyde in the mixture was different from that in its single component form,and it took about two times longer time to be degraded than that for its single component *** reaction pathway of benzene was similar in either case although the degradation time for benzene was about 50%shorter in the mixture form.

关键词： Photo-catalytic reactor Degradation Gaseous pollutant paper mill

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Comparison of the Bacterial Microbiota in a Bale of Collected Cardboard Determined by 454 Pyrosequencing and Clone Library

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Advances in Microbiology 2014年第12期4卷 754-760页

作者： Valérie Lalande Simon Barnabé Jean-Charles Coté Département de Biologie Médicale Université du Québec à Trois-RivièresTrois-RivièresCanada Agriculture and Agri-Food Canada Research and Development CentreSaint-Jean-sur-RichelieuCanada Département de Chimie Biochimie et PhysiqueUniversité du Québec à Trois-RivièresTrois-RivièresCanada

Biofouling, the accumulation of microorganisms, is a major problem in paper mills processing paper and cardboard. This leads to the production of lower quality recycled products. Several studies have focused on the microbial content in the paper mill and the final products. Our aim was to determine the microbial biota in a bale of collected cardboard prior to entering the paper mill. Total genomic DNA was isolated and analyzed using two different methods for comparison purposes: 454 pyrosequencing and clone library. A total of 3268 V6-V8 454 pyrosequencing reads and 322 cloned V6-V8 16S rRNA nucleotide sequences were obtained. Both methods showed the presence of three major bacterial genera: Bacillus, Solibacillus and Paenibacillus, all members of the spore-forming phylum Firmicutes. Pyrosequencing, however, revealed a richer and more diverse bacterial community than clone library. It showed the presence of additional minor Firmicute genera and of a small number of Proteobacteria. The sorting at the recycling plant, the storing, and the processing at the paper mill, the end uses, will all contribute to the bacterial microbiota present in a bale of collected cardboard as revealed here.

关键词： 454 Pyrosequencing Bacterial Microbiota Cardboard Clone Library paper mill

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