RESILIENT DENITRIFIERS WINK AT MICROBIAL SELF-HEALING CONCRETE
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN BIO-INFORMATICS, BIO-TECHNOLOGY AND ENVIRONMENTAL ENGINEERING
Author(s): NELE DE BELIE , NICO BOON , YUSUF CAGATAY ERSAN
Abstract: This study focused on identification of denitrifiers that can be used to achieve microbial self-healing concrete. By using heat treatment and minimal medium, 9 denitrifying strains were isolated from soil. Upon identification of the strains, their capability of handling dehydration stress was investigated. Qualifying 7 strains were further investigated at N:P ratio of 70:1. Finally, 2 strains, Pseudomonas aeruginosa and Diaphorobacter nitroreducens, were selected and investigated at pH 7, pH 9.5 and pH 13 with and without protection. As a protective carrier diatomaceous earth and expanded clay were used. Significant activity observed at pH 9.5 and with protection both strains could survive pH 13 for 14 days and reduced 20-30 mg/L NO3- in 4 days after the pH adjustment to ~10. Overall, the results indicated that Pseudomonas aeruginosa and Diaphorobacter nitroreducens can resist mild heat, dehydration, starvation and relatively alkali environment, which are the main concerns in use of ba
- Publication Date: 17-Nov-2014
- DOI: 10.15224/978-1-63248-053-8-08
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NI/SBA-15 CATALYSTS FOR METHANE DRY REFORMING
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN BIO-INFORMATICS, BIO-TECHNOLOGY AND ENVIRONMENTAL ENGINEERING
Author(s): A. URDA , I. SANDULESCU , M. OLEA , R. AHMED , S. TANASOI
Abstract: Methane and carbon dioxide are the major components of biogas produced by anaerobic digestion of biomass and conversion of biogas to syngas is of great interesting for making use of the sustainable biomass resource. The present paper deals with catalyst development and testing for the dry reforming of methane (DRM). Three different SBA-15 supported nickel catalysts were prepared, with nickel loadings from 5 to 20 wt. %, using a mixture of nickel precursors (acetate and nitrate). A cobalt modified Ni catalyst was also prepared using sequential impregnation. The catalysts were characterized by SEM/EDS, XRD, TEM and BET measurement. The mesoporous structure of the SBA-15 support was maintained and good dispersion and reasonably high loadings of nickel nano-particles on the support were obtained for all prepared catalysts. These samples were tested against the DRM, at different temperatures and CH4:CO2 molar ratios, in order to assess their activity and selectivity. High methane conversion
- Publication Date: 17-Nov-2014
- DOI: 10.15224/978-1-63248-053-8-09
- Views: 0
- Downloads: 0