World's Best Scientists 2026 revealed!

D-Index & Metrics

Engineering and Technology

D-Index
34
Citations
3287
World Ranking
9297
National Ranking
23

Environmental Sciences

D-Index
38
Citations
4782
World Ranking
8707
National Ranking
24

George A. Ekama publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where George A. Ekama sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 282 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 26 scientists 501–510 publications: 17 scientists 511–520 publications: 19 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–689 publications: 4 scientists 690+ publications: 100 scientists
41 publications 690+

This scientist: 111 publications — 19th percentile

19% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

George A. Ekama D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where George A. Ekama sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 198 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 20 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125 D-Index: 9 scientists 126+ D-Index: 92 scientists
30 D-Index 126+

This scientist: 38 D-Index — 12th percentile

12% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 126 D-Index or more.

Overview

George A. Ekama was affiliated with the University of Cape Town in South Africa. Their research primarily focused on Environmental Science and Engineering, contributing notably to several specialized subfields such as Industrial and Manufacturing Engineering, Water Science and Technology, Pollution, Building and Construction, and Food Science.

Their work addressed key topics including Wastewater Treatment and Nitrogen Removal, Anaerobic Digestion and Biogas Production, Membrane Separation Technologies, Wastewater Treatment and Reuse, Municipal Solid Waste Management, Food Waste Reduction and Sustainability, and Constructed Wetlands for Wastewater Treatment.

Ekama authored multiple papers, with significant publications appearing in the journal Water Research and Water SA. Among recent works were:

  • Integrated food waste management with wastewater treatment in Hong Kong: Transformation, energy balance and economic analysis, 2020, Water Research
  • Potential for co-disposal and treatment of food waste with sewage: A plant-wide steady-state model evaluation, 2020, Water Research
  • Ground food waste discharge to sewer enhances methane gas emission: A lab-scale investigation, 2020, Water Research
  • Identifying the mechanisms of sludge reduction in the sulfidogenic oxic-settling anaerobic (SOSA) process: Side-stream sulfidogenesis-intensified sludge decay and mainstream extended aeration, 2020, Water Research
  • A novel approach for rapidly measuring volatile fatty acids in anaerobic process, 2020, Water Research

Frequent co-authors in their research included Guanghao Chen, Feixiang Zan, Asad Iqbal, Xiaoming Liu, and Ji Dai. Collaborations with these colleagues contributed to advancements across multiple publications.

Best Publications

  • Biological Wastewater Treatment: Principles, Modelling and Design

    Mogens Henze;M.C.M. van Loosdrecht;G.A. Ekama;D. Brdjanovic

  • A GENERAL MODEL FOR THE ACTIVATED SLUDGE PROCESS

    Unknown

  • Anoxic growth of phosphate-accumulating organisms (PAOs) in biological nutrient removal activated sludge systems

    Zhi-rong Hu;M.C Wentzel;G.A Ekama

  • Integrated chemical–physical processes modelling—II. simulating aeration treatment of anaerobic digester supernatants

    E.V. Musvoto;M.C. Wentzel;G.A. Ekama

  • Greenhouse gases from wastewater treatment - A review of modelling tools.

    Giorgio Mannina;George Ekama;Donatella Caniani;Alida Cosenza

  • Processes and Modelling of Nitrification Denitrification Biological Excess Phosphorus Removal Systems – A Review

    M. C. Wentzel;G. A. Ekama;G. v. R. Marais

  • Large-scale demonstration of the sulfate reduction autotrophic denitrification nitrification integrated (SANI(®)) process in saline sewage treatment.

    Di Wu;George A. Ekama;Ho Kwong Chui;Bo Wang

  • Biological excess phosphorus removal - steady state process design.

    M. C. Wentzel;G. A. Ekama;P. L. Dold;G. V. R. Marais

  • Plant-wide modelling of phosphorus transformations in wastewater treatment systems: Impacts of control and operational strategies

    K Solon;X Flores-Alsina;C Kazadi Mbamba;D Ikumi

  • New framework for standardized notation in wastewater treatment modelling

    Lluis Corominas;L. Rieger;I. Takács;G. Ekama

  • Modelling multiple mineral precipitation in anaerobic digester liquor

    P van Rensburg;E.V Musvoto;M.C Wentzel;G.A Ekama

  • Secondary settling tanks : theory, modelling, design and operation

    Unknown

  • Considerations in the Process Design of Nutrient Removal Activated Sludge Processes

    G A Ekama;I P Siebritz;G V R Marais

  • A steady state model for anaerobic digestion of sewage sludges

    SW Sötemann;NE Ristow;MC Wentzel;GA Ekama

  • Coupling of sulfur(thiosulfate)-driven denitratation and anammox process to treat nitrate and ammonium contained wastewater.

    Yang-Fan Deng;George A. Ekama;Yan-Xiang Cui;Cong-Jian Tang

  • A 5 pH Point Titration Method for Determining the Carbonate and SCFA Weak Acid/Bases in Anaerobic Systems

    R. E. Moosbrugger;M. C. Wentzel;G. A. Ekama;G. v. R. Marais

  • Heterotroph anoxic yield in anoxic aerobic activated sludge systems treating municipal wastewater.

    A. Muller;M.C. Wentzel;R.E. Loewenthal;G.A. Ekama

  • Design and start-up of a high rate anaerobic membrane bioreactor for the treatment of a low pH, high strength, dissolved organic waste water

    P. J. Van Zyl;M. C. Wentzel;G. A. Ekama;K. J. Riedel

  • A new general methodology for incorporating physico-chemical transformations into multi-phase wastewater treatment process models.

    I. Lizarralde;T. Fernández-Arévalo;C. Brouckaert;P. Vanrolleghem

  • Towards a generalized physicochemical framework.

    Damien J. Batstone;Youri Amerlinck;George Ekama;Rajeev Goel

  • Biodegradability of activated sludge organics under anaerobic conditions.

    G.A. Ekama;S.W. Sötemann;M.C. Wentzel

  • DENITRIFICATION KINETICS IN BIOLOGICAL N AND P REMOVAL ACTIVATED SLUDGE SYSTEMS TREATING MUNICIPAL WASTEWATERS

    George A. Ekama;Mark C. Wentzel

  • Simultaneous nitrogen and phosphorus removal in the sulfur cycle-associated Enhanced Biological Phosphorus Removal (EBPR) process.

    Di Wu;George A. Ekama;Hai Guang Wang;Li Wei

  • Difficulties and developments in biological nutrient removal technology and modelling

    George A. Ekama;Mark C. Wentzel

  • SANI® process realizes sustainable saline sewage treatment: Steady state model-based evaluation of the pilot-scale trial of the process

    Hui Lu;George A. Ekama;Di Wu;Jiang Feng;Jiang Feng

  • The use of simultaneous chemical precipitation in modified activated sludge systems exhibiting biological excess phosphate removal. Part 4 : Experimental periods using ferric chloride : The use of simultaneous chemical precipitation in modified activated sludge systems exhibiting biological excess phosphate removal

    Unknown

  • A Hypothesis for the Causes and Control of Anoxic-Aerobic (AA) Filament Bulking in Nutrient Removal Activated Sludge Systems

    T. G. Casey;M. C. Wentzel;G. A. Ekama;R. E. Loewenthal

  • Advances in sulfur conversion-associated enhanced biological phosphorus removal in sulfate-rich wastewater treatment: A review

    Gang Guo;Geortge A. Ekama;Yayi Wang;Ji Dai

  • Modelling biological nutrient removal activated sludge systems - a review.

    Zhi-rong Hu;M.C Wentzel;G.A Ekama

  • Steady-state model-based evaluation of sulfate reduction, autotrophic denitrification and nitrification integrated (SANI) process.

    Hui Lu;Jin Wang;Shen Li;Guang-Hao Chen

  • Principles in the design of single-sludge activated-sludge systems for biological removal of carbon, nitrogen, and phosphorus

    Mark C. Wentzel;George A. Ekama

Frequent Co-Authors

Guanghao Chen
Guanghao Chen Hong Kong University of Science and Technology
Giorgio Mannina
Giorgio Mannina University of Palermo
M. C. Wentzel
M. C. Wentzel University of Cape Town
Damir Brdjanovic
Damir Brdjanovic IHE Delft Institute for Water Education
Daniele Di Trapani
Daniele Di Trapani University of Palermo
Hallvard Ødegaard
Hallvard Ødegaard Norwegian University of Science and Technology
Wen-Tso Liu
Wen-Tso Liu University of Illinois at Urbana-Champaign
M.C.M. van Loosdrecht
M.C.M. van Loosdrecht Delft University of Technology
Mogens Henze
Mogens Henze Technical University of Denmark
Yves Comeau
Yves Comeau Polytechnique Montréal

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