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RISS 인기검색어
- 검색키워드
- 저자 : Nagendranatha Reddy, C. (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Nagendranatha Reddy, C.,Bae, Sungwoo,Min, Booki Elsevier 2019 Bioresource technology Vol.285 No.-
<P><B>Abstract</B></P> <P>In this study, a semi-pilot scale biotrickling filter (BTF) was operated in a continuous co-current mode to remove high concentration of hydrogen sulfide (H<SUB>2</SUB>S) at optimum operational conditions. The early startup period of 6 days was needed, and then stable removal of H<SUB>2</SUB>S gas at inlet concentrations up to about 2000 ppm was successfully obtained at gas retention time (GRT) of 15 min and liquid recirculation rate (LRR) of 120 ml/min. The elimination capacities (ECs) increased linearly with increase in H<SUB>2</SUB>S loading rates (HLRs up to 38.5 g/m<SUP>3</SUP> h), but a gradual decrease in removal efficiency was observed from a volumetric HLR of 18.1 g/m<SUP>3</SUP> h. The LRR was further decreased from 120 to 30 ml/min, and the minimum liquid–gas ratio of 0.24 was found without decrease in removal efficiency. The MiSeq analysis revealed the presence of sulphur oxidizing bacteria (SOB) dominated by <I>Acidithiobacillus caldus</I> (>97%) at all portions of BTF.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Semi-pilot scale biotrickling filter (BTF) successfully removed high level of H<SUB>2</SUB>S gas. </LI> <LI> Elimination capacity increased almost linearly with loading rates up to 38.5 g/m<SUP>3</SUP> h. </LI> <LI> H<SUB>2</SUB>S at inlet concentrations of 2000 ppm could be removed with >99% efficiency at 15 min retention time. </LI> <LI> <I>Acidithiobacillus caldus</I> was enriched at all portions of BTF during H<SUB>2</SUB>S removal. </LI> </UL> </P>
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Nagendranatha Reddy, C.,Nguyen, Hai T.H.,Noori, Md T.,Min, Booki Elsevier 2019 Bioresource technology Vol.292 No.-
<P><B>Abstract</B></P> <P>Production of biofuels and other value-added products from wastewater along with quality treatment is an uttermost necessity to achieve environmental sustainability and promote bio-circular economy. Algae-Microbial fuel cell (A-MFC) with algae in cathode chamber offers several advantages e.g. photosynthetic oxygenation for electricity recovery, CO<SUB>2</SUB>-fixation, wastewater treatment, etc. However, performance of A-MFC depends on several operational parameters and also on electrode materials types; therefore, enormous collective efforts have been made by researchers for finding optimal conditions in order to enhance A-MFC performance. The present review is a comprehensive snapshot of the recent advances in A-MFCs, dealing two major parts: 1) the power generation, which exclusively outlines the effect of different parameters and development of cutting edge cathode materials and 2) wastewater treatment at cathode of A-MFC. This review provides fundamental knowledge, critical constraints, current status and some insights for making A-MFC technology a reality at commercial scale operation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Current status and potentials of algae-cathode MFCs were comprehensively reviewed. </LI> <LI> Limitations and future perspectives of algae MFC for real applications was discussed. </LI> <LI> A closed-loop algae MFC system with biorefinery concept was presented. </LI> </UL> </P>
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