Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Biological Wastewater Treatment: Principles, Modelling and Design
This map shows the geographic impact of GA Ekama's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by GA Ekama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites GA Ekama more than expected).
This network shows the impact of papers produced by GA Ekama. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by GA Ekama. The network helps show where GA Ekama may publish in the future.
Co-authorship network of co-authors of GA Ekama
This figure shows the co-authorship network connecting the top 25 collaborators of GA Ekama.
A scholar is included among the top collaborators of GA Ekama based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with GA Ekama. GA Ekama is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ekama, GA, et al.. (2010). Biological sulphate reduction with primary sewage sludge in an upflow anaerobic sludge bed reactor - Part 5: Steady-state model. Water SA. 36(3). 193–202.9 indexed citations
4.
Ekama, GA, et al.. (2010). Biological sulphate reduction with primary sewage sludge in an upflow anaerobic sludge bed reactor - Part 6: Development of a kinetic model for BSR. Water SA. 36(3). 203–214.18 indexed citations
Wentzel, M. C., et al.. (2000). The use of simultaneous chemical precipitation in modified activated sludge systems exhibiting biological excess phosphate removal - Part 2: Method development for fractionation of phosphate compounds in activated sludge. Water SA. 26(4). 453–466.39 indexed citations
12.
Ekama, GA, et al.. (2000). Extension and application of the three-phase weak acid/base kinetic model to the aeration treatment of anaerobic digester liquors. Water SA. 26(4). 417–438.26 indexed citations
13.
Wentzel, M. C., et al.. (1999). Filamentous organism bulking in nutrient removal activated sludge systems Paper 9: Review of biochemistry of heterotrophic respiratory metabolism. Water SA. 25(4). 409–424.9 indexed citations
14.
Ekama, GA, et al.. (1996). Filamentous organism bulking in nutrient removal activated sludge systems. Paper 5: Experimental examination of aerobic selectors in anoxic-aerobic systems. Water SA. 22(2). 139–146.5 indexed citations
15.
Wentzel, M. C., et al.. (1995). Batch test for measurement of readily biodegradable COD and active organism concentrations in municipal waste waters. Water SA. 21(2). 117–124.40 indexed citations
16.
Ekama, GA, et al.. (1995). Filamentous organism bulking in nutrient removal activated sludge systems. I: A historical overview of causes and control. Water SA. 21(3). 231–238.8 indexed citations
17.
Ekama, GA, et al.. (1993). Evaluation of the dual digestion system 2: operation and performance of the pure oxygen aerobic reactor. Water SA. 19(3). 193–200.9 indexed citations
18.
Ekama, GA, et al.. (1993). Evaluation of the dual digestion system 1: overview of the Milnerton experience. Water SA. 19(3). 185–191.3 indexed citations
19.
Loewenthal, R. E., M. C. Wentzel, GA Ekama, & G. v. R. Marais. (1991). Mixed weak acid/base systems. II : Dosing estimation, aqueous phase. Water SA. 17(2). 107–122.10 indexed citations
20.
Randall, E. W., Angus P. Wilkinson, & GA Ekama. (1991). An instrument for the direct determination of oxygen utilisation rate. Water SA. 17(1). 11–18.21 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.