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- 저자 : rgyi, Eszter (검색결과 2 건)
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Nemestó,thy, Ná,ndor,Bakonyi, Pé,ter,Szentgyö,rgyi, Eszter,Kumar, Gopalakrishnan,Nguyen, Dinh Duc,Chang, Soon Woong,Kim, Sang-Hyoun,Bé,lafi-Bakó,, Katalin Elsevier 2018 JOURNAL OF CLEANER PRODUCTION Vol.185 No.-
<P><B>Abstract</B></P> <P>In this paper, the enrichment of methane by membrane technology was studied by employing (i) a model as well as (ii) a real biogas mixture produced on a laboratory-scale. Thereafter, the endurance of the process was tested at an existing biogas plant. The commercial gas separation module under investigation contained hollow fiber membranes with a polyimide selective layer. During the measurements, the effect of critical factors (including the permeate-to-feed pressure ratio and the splitting factor) was sought in terms of the (i) CH<SUB>4</SUB> content on the retentate-side and (ii) CH<SUB>4</SUB> recovery, which are important measures of biogas upgrading efficiency. The results indicated that a retentate with 93.8 vol% of CH<SUB>4</SUB> – almost biomethane (>95 vol% of CH<SUB>4</SUB>) quality – could be obtained using the model gas (consisting of 80 vol% of CH<SUB>4</SUB> and 20 vol% of CO<SUB>2</SUB>) along with 77.4% CH<SUB>4</SUB> recovery in the single-stage permeation system. However, in the case of the real biogas mixture, ascribed primarily to inappropriate N<SUB>2</SUB>/CH<SUB>4</SUB> separation, the peak methane concentration noted was only 80.7 vol% with a corresponding 76% CH<SUB>4</SUB> recovery. Besides, longer-term experiments revealed the adequate time-stability of membrane purification, suggesting such a process is feasible under industrial conditions for the improvement of biogas quality.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Membrane gas separation was applied for biogas enrichment. </LI> <LI> Polyimide membrane was investigated to deliver biomethane. </LI> <LI> Significant variables affecting membrane performance were evaluated. </LI> <LI> Process efficiency was dependent on gas composition (model vs. real biogas). </LI> <LI> The gas permeation was steady in longer-terms using real biogas mixture. </LI> </UL> </P>
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Zsolnai Attila,Egerszegi István,Rózsa László,Mezőszentgyörgyi Dávid,Anton István 아세아·태평양축산학회 2023 Animal Bioscience Vol.36 No.1
Objective: In this study, we aimed to position the Hungarian Merino among other Merinoderived sheep breeds, explore the characteristics of our sampled animals' genetic similarity network within the breed, and highlight single nucleotide polymorphisms (SNPs) associated with daily weight-gain. Methods: Hungarian Merino (n = 138) was genotyped on Ovine SNP50 Bead Chip (Illumina, San Diego, CA, USA) and positioned among 30 Merino and Merino-derived breeds (n = 555). Population characteristics were obtained via PLINK, SVS, Admixture, and Treemix software, within-breed network was analysed with python networkx 2.3 library. Daily weight gain of Hungarian Merino was standardised to 60 days and was collected from the database of the Association of Hungarian Sheep and Goat Breeders. For the identification of loci associated with daily weight gain, a multi-locus mixed-model was used. Results: Supporting the breed's written history, the closest breeds to Hungarian Merino were Estremadura and Rambouillet (pairwise FST values are 0.035 and 0.036, respectively). Among Hungarian Merino, a highly centralised connectedness has been revealed by network analysis of pairwise values of identity-by-state, where the animal in the central node had a betweenness centrality value equal to 0.936. Probing of daily weight gain against the SNP data of Hungarian Merinos revealed five associated loci. Two of them, OAR8_17854216.1 and s42441.1 on chromosome 8 and 9 (–log10P>22, false discovery rate<5.5e-20) and one locus on chromosome 20, s28948.1 (–log10P = 13.46, false discovery rate = 4.1e-11), were close to the markers reported in other breeds concerning daily weight gain, six-month weight, and post-weaning gain. Conclusion: The position of Hungarian Merino among other Merino breeds has been determined. We have described the similarity network of the individuals to be applied in breeding practices and highlighted several markers useful for elevating the daily weight gain of Hungarian Merino.
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