Investigating the Challenges and Opportunities of Centralized Domestic Wastewater Management in Kaliti Catchment, the Case of Akaki-Kaliti Sub-City, Addis Ababa
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Date
2020-06
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Addis Ababa University
Abstract
Efficient ways of managing domestic wastewater discharges is the foundation of sustainable and
modern urban city development. Sustainability of urban water system stands on appropriate
treatment mechanisms and reuse of wastewater discharges. As a result, wastewater can be
considered not as a problem that requires to be disposed of but rather as a variety of local
resources. The background of this study in general relays on human factors, a cause to pollute
the environment with various day to day activities. So the Objective of the study is to examine the
challenges and opportunities of domestic wastewater management in Addis Ababa city based on
study conducted in Akakii Kaliti subcity. The data was collected through survey questioners,
interview and physical observation of the study area. Primary and secondary data was collected
from households and relevant stakeholders in Addis Ababa Water and Sanitation Authority and
Kaliti treatment plant. Various aspect of wastewater management was inspected on site. Simple
random sampling was applied to select the sample households, whereas, Purposive sampling
was used to select the sample Sub-city, and key informants for interview. By this sampling
technique 138 respondents were selected from the 181202 total populations. Descriptive
statistics analysis used to analyze data and the collected data were analyzed using statistical
software (SPSS version 24.0). The capacity of government, societal attitudinal change, and
technology and manpower are the major factors of efficient and effective wastewater
managements respectively. Most of the respondents do not accepted the treated wastewater
purity and the treatment efficiency of Kaliti treatment plant below 50% for irrigation, carwash
and toilet purpose. In the field study there is no private organization, which participates in the
treatment processes. However government is not attending the demand of wastewater treatment.
The Luck of adequate sewerage system in the city and deteriorations of sewer line and luck of
regular repair and maintenance are the main factors to reach the waste at central level. In the
study area wastewater become more complex and the quantity has also increased from time to
time. Lack of awareness and enforcement are some of the challenges facing wastewater
treatment plant in Addis Ababa city administration. Kaliti wastewater treatment plant is
currently used up flow anaerobic sludge blanket reactors trickling filters technology, but it
operates under its design capacity. Therefore, domestic wastewater discharges from the city
households should be administered sustainably.
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Keywords
Domestic Wastewater, Addis Ababa, Wastewater Management, Impact of Wastewater Treatment