Browsing by Author "Bekele, Biniyam"

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    Assessment of Effluent Characteristics and Wastewater Management Practices in Selected Hospitals of Addis Ababa Ethiopia
    (Addis Ababa University, 2021-09-11) Bekele, Biniyam; Tekola, Beteley (PhD)
    Pollutants from hospital wastewaters are becoming serious issue in both developing countries of the world. There is a need to evaluate the quality of wastewater discharged from hospitals with regulatory standards. In response, this study investigates the wastewater generation, characteristics and sewage management practices in seventeen selected hospitals in Addis Ababa, Ethiopia. Descriptive study was employed to understand the status of wastewater management practices. Wastewater sampled weekly from August 10/2020 to August 24/2020. Two public hospitals were used to analysis of heavy metals, bacteriological and other physico-chemical wastewater parameters were analyzed using standard methods and the results were compared with effluent permissible limit standard of the City (AACGEPGD). pH, Conductivity, Turbidity and Total coliform levels were in the range of 6.8-7, 1058-1390 μS/cm, 60-152 NTU and >2400 MPN, respectively. The range of other parameters include total suspended solids; 100-550 mg/L, total solids; 692-1528 mg/L, total dissolved solids; 410-1428 mg/L, chemical oxygen demand; 93-443 mg/L, biological oxygen demand; 29-118 mg/L, total organic carbon; 2-9 mg/L, total nitrogen; 1-18 mg/L, total phosphate; 13-40 mg/L and sulfate; 16-48 mg/L, mercury; 0.003-0.21 mg/L, manganese; 0.05-0.93 mg/L, zinc; 0.02-0.85 mg/L and iron; 0.7-4.89 mg/L, were investigated. The results indicated that the effluent quality of the presented hospitals for most wastewater parameters such as; EC, TSS, TDS, BOD5, COD, TP, TN and Total coliforms were above the standard permissible limit of the city (AACGEPGD). Therefore, the surveyed hospitals must need to adopt preferable wastewater treatment plant up to the existing standards.
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    Assessment of the Critical Success Factors in the Case of Selected Building Construction Projects in Hawasa
    (Addis Ababa University, 2021-06-03) Bekele, Biniyam; Atara, Adane(PhD)
    Building construction has been one of the fastest-growing segments of the construction industry in Ethiopian. But most of construction projects, especially which are undertaken by local contractors were poor in accordance with time, cost and quality. Even though there are numerous factors, which affect the building construction projects, this research is aimed to assess and study four critical success factors, which influence success of building construction projects. Namely: Time, cost, quality, and project management competency. The four critical factors were identified from the widespread application of project management concepts and general understanding amongst practitioners. And twenty-five construction projects were selected as unit of analysis for this study. Descriptive research design was used to assess the critical success factors in the selected construction projects. Primary and secondary data were also used for the achievement of the study. A structured questionnaire was developed to gather information to assess and analysis the critical success factors, which affect the success of building construction projects. And other significant project management practices were also captured in relevant literature. Seventy-five questioners were distributed and only fifty-five of the respondents were responded the questionnaires. Then the data obtained from the distributed questionnaires was analyzed using SPSS 24 software. Descriptive statistics were used to analyze and interpret the data found from the respondents. The findings show that the assessment of the practice level of the identified factors within the building construction companies resulted in a high level of mean score values. And all the factors that are considered as critical success factors (project manager competency, time, cost, and quality related factors) have a great contribution to the successful completion of a project and are being practiced within the companies under study. And from all the identified success factors, project manager competency related a critical success factor has the highest mean value. So the research recommend for building construction companies to emphasis more on the competency of their construction project manager. So that they can resolve cost, quality, and time related problems.