| Biological wastewater treatment M Henze, MCM van Loosdrecht, GA Ekama, D Brdjanovic IWA publishing, 2008 | 2133 | 2008 |
| Procedures for determining influent COD fractions and the maximum specific growth rate of heterotrophs in activated sludge systems GA Ekama, PL Dold, GR Marais Water Science and Technology 18 (6), 91-114, 1986 | 820 | 1986 |
| A general model for the activated sludge process PL Dold, GA Ekama Water pollution research and development, 47-77, 1981 | 561 | 1981 |
| Processes and modelling of nitrification denitrification biological excess phosphorus removal systems–A review MC Wentzel, GA Ekama, GR Marais Water Science and Technology 25 (6), 59-82, 1992 | 395* | 1992 |
| Secondary settling tanks GA Ekama, GL Barnard, FW Gunthert, P Krebs, JA McCorquodale, ... London: International Association on Water Quality, 1997 | 368 | 1997 |
| The activated sludge process part I-steady state behaviour GVR Marais, GA Ekama Water Sa 2 (4), 163-200, 1976 | 313 | 1976 |
| Anoxic growth of phosphate-accumulating organisms (PAOs) in biological nutrient removal activated sludge systems Z Hu, MC Wentzel, GA Ekama Water Research 36 (19), 4927-4937, 2002 | 260 | 2002 |
| Evaluation of biochemical models for biological excess phosphorus removal MC Wentzel, LH Lötter, GA Ekama, RE Loewenthal, GR Marais Water Science and Technology 23 (4-6), 567-576, 1991 | 259 | 1991 |
| Integrated chemical–physical processes modelling—II. simulating aeration treatment of anaerobic digester supernatants EV Musvoto, MC Wentzel, GA Ekama Water Research 34 (6), 1868-1880, 2000 | 255 | 2000 |
| The use of simultaneous chemical precipitation in modified activated sludge systems exhibiting biological excess phosphate removal-Part 1: Literature review GA de Haas, DW, Wentzel, MC & Ekama Water Sa 26 (4), 439-452, 2000 | 248* | 2000 |
| Enhanced polyphosphate organism cultures in activated sludge systems. Part II: Experimental behaviour GR Wentzell, MC*, Ekama, GA*, Loewenthal, RE*, Dold, PL** and Marais Water Sa 15 (2), 71-88, 1989 | 248 | 1989 |
| Greenhouse gases from wastewater treatment—A review of modelling tools G Mannina, G Ekama, D Caniani, A Cosenza, G Esposito, R Gori, ... Science of the Total Environment 551, 254-270, 2016 | 243 | 2016 |
| Enhanced polyphosphate organism cultures in activated sludge systems-Part 1: Enhanced culture development GR Wentzel, MC, Loewenthal, RE, Ekama, GA & Marais Water Sa 14 (2), 81-92, 1988 | 236 | 1988 |
| Theory, Design and Operation of Nutrient Removal Activated Sludge Processes: A Collaborative Information Document GA Ekama Water Research Commission, 1984 | 191 | 1984 |
| The activated sludge process—3 single sludge denitrification AC Van Haandel, GA Ekama, GR Marais Water Research 15 (10), 1135-1152, 1981 | 184 | 1981 |
| Large-scale demonstration of the sulfate reduction autotrophic denitrification nitrification integrated (SANI®) process in saline sewage treatment D Wu, GA Ekama, HK Chui, B Wang, YX Cui, TW Hao, ... Water research 100, 496-507, 2016 | 176 | 2016 |
| Kinetics of biological phosphorus release MC Wentzel, PL Dold, GA Ekama, GR Marais Water Science and Technology 17 (11-12), 57-71, 1985 | 175 | 1985 |
| A survey of filamentous bulking and foaming in activated-sludge plants in South Africa. JR Blackbeard, GA Ekama, GVR Marais | 170 | 1986 |
| Integrated chemical–physical processes modelling—I. Development of a kinetic-based model for mixed weak acid/base systems EV Musvoto, MC Wentzel, RE Loewenthal, GA Ekama Water Research 34 (6), 1857-1867, 2000 | 168 | 2000 |
| A steady state model for anaerobic digestion of sewage sludges SW Sotemann, NE Ristow, MC Wentzel, GA Ekama Water SA 31 (4), 511-528, 2005 | 155 | 2005 |
