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Your search keyword '"Mazancová, Jana"' showing total 30 results
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30 results on '"Mazancová, Jana"'

12. Economics and perception of small-scale biogas plant benefits installed among peri-urban and rural areas in central Vietnam.

Author

Verner, Vladimir, Mazancová, Jana, Jelínek, Marek, Phung, Le Dinh, Van Dung, Dinh, Banout, Jan, and Roubík, Hynek

Abstract

The implementation of biogas plants in Southeast Asia brings many benefits to the households through socio-economic, environmental and health improvements. This paper expands the knowledge on essential aspects of biogas implementation such as socio-economic impact, post-adaptation perception and cultural habits related to traditional fuel use, focusing on differences in household economics and livelihood diversity at the peri-urban–rural continuum. A questionnaire survey was conducted from July to September in Thua Thien Hue Province central Vietnam, among rural (n=55) and peri-urban (n=63) households owning a biogas plant of various ages. Our results show that technical problems with biogas plants were influenced by the age of the biogas plant and the owners' experience with the management of the plant. The reduction of costs on energy was the main reason for households to install a biogas plant. However, households with biogas plants in the rural area experienced lower profitability and an almost two-times longer pay-back period than those situated near cities (internal rate of return equals 20.20% and 48.16%, respectively). Furthermore, our study shows that biogas plant installation reduces firewood consumption, particularly in peri-urban areas. The saved time initially needed for dung management or firewood collection/management, households members used predominantly for leisure and household chores, less on income-generating activities. Our study concludes that rural areas face operational problems more frequently, which, together with lower economic efficiency, negatively affect the successful implementation of biogas plants in remote areas of central Vietnam. [ABSTRACT FROM AUTHOR]

Published
2023
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15. ASSESSMENT OF BIOGAS QUALITY ACROSS RURAL HOUSEHOLD BIOGAS PLANTS IN CAMEROON.

Author

Ketuama, Chama Theodore, Mazancová, Jana, and Roubík, Hynek

Subjects
*BIOGAS, *BIOGAS production, *CLEAN energy, *POWER resources, *CARBON dioxide, *RENEWABLE energy sources, *RURAL hospitals, SNOWBALL sampling
Abstract

The development and efficient use of renewable energy technologies is essential to sustain access to clean energy for all. In developing countries, it is necessary to improve the efficiency of biogas production to contribute to the decarbonization of the energy supply. This study aims to assess the quality of biogas produced from household biogas plants in rural areas of Cameroon. Through snowball sampling, data were collected from forty-five (45) functional biogas plants across the five agroecological zones of the country. Biogas was analyzed using the portable BIOGAS 5000 gas analyzer and compared for different designs of biogas plants and geographic locations. The results show on average that the floating drum biogas plant produced biogas with a higher methane content (57.90% v/v) than the floating drum design (55.30% v/v). The mean carbon dioxide content is 38.80% v/v for the fixed dome and 30.25% v/v for the floating drum biogas plant. Statistical tests indicate that the location of the biogas plant affected the methane content of the biogas produced. The feedstocks and design of biogas plants varied with the different agroecological zones of the country, and majorly accounted for the different qualities of biogas. The quality of biogas in Cameroon is within the reported range (average) of biogas quality in developing countries. However, it is still essential to promote the production of biogas with optimal quality in the country. [ABSTRACT FROM AUTHOR]

Published
2022
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30. Description of Phradonoma blabolili sp. n. (Coleoptera, Dermestidae, Megatominae), with notes on the dermestid beetles from Angola.

Author

Háva, Jirí, Lackner, Tomás, and Mazancová, Jana

Subjects
DERMESTIDAE, BEETLES, CLASSIFICATION of insects, INSECT identification
Abstract

Phradonoma blabolili sp. n. from Angola is described and illustrated. Key to the Afrotropical "Phradonoma nobile species group" to which the newly described species belongs, as well as key to genera of dermestid beetles occurring in Angola is given. List of all species of Dermestidae known to occur in Angola hitherto is provided. [ABSTRACT FROM AUTHOR]

Published
2013
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