Browsing by Author "Tesfamichael Awoke"

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    Experimental Investigation of Solid-Liquid Separator and Solar Tunnel Dryer for a Biogas Digestate
    (Addis Ababa University, 2023-06) Tesfamichael Awoke; Wondwossen Bogale (PhD)
    Through the 20th century, higher energy demand, fossil fuel depletion, environmental pollution problems and waste management requirements led the development of biogas production technology. However, the biogas plant's slurry/digestate, causes significant environmental issues since it pollutes the soil, water, and air through the release of phosphate and nitrate gases. With the use of mechanical and thermal treatments, digested biogas waste is suitable for use as fertilizer or a soil amendment. In order to use biogas digestate as fertilizer, to minimize environmental pollution and to store and transport it securely and conveniently; liquid components must first be separated mechanically by presses (solid-liquid separator) and then thermally by vaporization (dryer). This study examines the fundamental design of the screw type solid-liquid separator and solar tunnel dryer, manufacturing and laboratory investigations, as well as characterize both the solid and the liquid portions’ suitability from the mechanical and thermal parameters such as the portions’ final moisture content. By using both the separator and dryer, the moisture content (the liquid fraction) of the fresh biogas digestate is able to reduce from 75% to 5% ( from 75% to 40% using the separator and from 40% to 5% using the solar dryer). The separator has a capacity of separating 7.5m3 of digestate at 8 hours and the dryer has the capacity to dry 2m3 of digestate at a drying time of 3 days, 7-8 hr. per day at the experimentation site Addis Ababa, 8.9806° N, 38.7578° E. Both the separator and dryer has a cost of approximately 35,000 ETB.
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    Knowledge, Attitude and Utilization of Partograph and Associated Factors among Obstetric Care Providers in Public Health Facilities of Addis Ababa, Ethiopia.
    (Addis Abeba University, 2021-06) Mulago Shafi; Nigussie Assefa; Tesfamichael Awoke
    Background: Partograph is a low-cost, low-cost technology that provides a continuous graphical overview of labor progress in order to avoid protracted and blocked labor. Assessing obstetric care providers' knowledge, attitude, and practical use of partographs, as well as their determinants, aids in the development of effective intervention strategies for providing high-quality maternity care. Objectives: The aim of this study was to assess the knowledge, attitude, utilization of partograph and associated factors among obstetric care providers in public health facilities of Arada, Yeka and Lideta Sub cities, Addis Ababa, Ethiopia. Methods: From January 1 to March 30, 2019, researchers employed a facility-based cross-sectional design in Addis Ababa, Ethiopia. A total of 314 obstetric care providers were randomly selected from public health facilities in the Arada, Yeka, and Lideta Sub-cities of Addis Ababa, City Administration, and proportionally allocated. An interview-based structured questionnaire was used to collect data. To determine the actual use of partograph, all study participants were subjected to direct observations utilizing an observation checklist. EpiInfo version 3.5.1 was used to enter data, and SPSS version 22 was used to analyze it. Descriptive statistics were produced, including frequency, percentage, mean, and median. There searchers used bivariate and multivariable logistic regression analysis. To protect data confidentiality, no personal information about study participants was collected during data collection. Results: 72% of people responded to this survey. 257 (85%) of the obstetric care providers had a positive view regarding partograph, and 254 (84.1%) of them used it. Partograph use was linked to being a midwife (AOR=2.6; 95 percent CI: 1.8, 5.4) and knowing how to use it (AOR=4; 95 percent CI: 2.0, 8.1). However, it was associated with a negative relationship with service years 0-2 years (AOR=0.4%; CI: 0.2, 0.9) and service years 3-5 years (AOR=0.6%; CI: 0.3, 0.7). Conclusion: More over three-quarters of those polled knew what partograph was, had an opinion about it, and used it. Partograph knowledge and attitude were high among service providers, and usage was good. Partograph use was linked to knowledge of partograph, service year, and the profession of obstetric care providers.