Jazie, A.A. 2019. DBSA-Catalyzed Sewage Sludge Conversion into Biodiesel in a CSTR: RSM Optimization and RTD Study. Journal of Engineering and Technological Sciences. 51, 4 (Aug. 2019), 537-555. DOI:https://doi.org/10.5614/j.eng.technol.sci.2019.51.4.6.