Zede 2024. PERFORMANCE ENHANCEMENT OF KALITY WASTEWATER TREATMENT PLANT’S UP FLOW ANAEROBIC SLUDGE BLANKET REACTOR USING SURFACE RESPONSE METHODS. Zede: Journal of Ethiopian Engineers and Architects የኢትዮጵያ መሐንዲሶችና አርክቴክቶች መጽሔት. 42, (Oct. 2024), 57–75. DOI:https://doi.org/10.20372/zede.v42i.10182.