Prof. Johannes Philippus Maree
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Biography
Prof. Johannes P. Maree, Pr.Sci.Nat., is a Research Professor at the Institute for Nanotechnology and Water Sustainability (iNanoWS), University of South Africa, and founder and director of ROC Water Technologies. He has extensive research and industrial experience in mine-water and industrial wastewater treatment, with particular interests in acid mine drainage, neutralisation, desalination, freeze crystallisation, evaporation, mineral and salt recovery, and the beneficial use of industrial waste heat. His research focuses on developing and scaling sustainable processes that convert wastewater and waste streams into sources of reusable water and valuable products. Technologies developed through his research have progressed from laboratory studies to pilot, demonstration, and industrial application. He is an NRF C2-rated researcher and a registered Professional Natural Scientist (Pr.Sci.Nat.). His contributions to water-treatment technology have received recognition including the CSIR Business Award and the Umgeni Water Award.
Affiliations
University of South Africa
Pretoria, Gauteng, South Africa
Institute for Nanotechnology and Water Sustainability
Honors and Awards
2025, A Tech Challenge Winner
SA Tech Challenge, Pretoria, Gauteng, South Africa
ROC Water Technologies was selected as a winner and awarded R1 million in support of further research and development of freeze crystallisation technology.
2024, Innovate UK KTN Challenge – Saline Water Treatment
Innovate UK, Swindon, UK
Recognition through an innovation challenge addressing the treatment of highly saline waters from toxic waste disposal sites.
2021, NSTF-South32 Award – SMME Category
National Science and Technology Forum, Pretoria, Gauteng, South Africa
Winner for an outstanding contribution to science, engineering and technology through research leading to innovation in a Small, Medium or Micro Enterprise.
2021, Research award
University of Limpopo, Polokwane, South Africa
Award for research contributions within the Faculty of Science and Agriculture.
2014, NSTF Award – Research and Innovation in an SMME
National Science and Technology Forum, Pretoria, South Africa
Winner for an outstanding contribution to science, engineering and technology through research leading to innovation in a Small, Medium or Micro Enterprise.
2013, THRIP Quality and Quantity of Students Award – First Prize
Department of Trade, Industry and Competition, Pretoria, South Africa
First Prize in the THRIP Quality and Quantity of Students category, recognising research capacity development and postgraduate training.
2013, THRIP Quality and Quantity of Students Award – First Prize
Department of Trade, Industry and Competition, Pretoria, South Africa
First Prize in the THRIP Quality and Quantity of Students category, recognising research capacity development and postgraduate training.
2011, THRIP Best Support to Industrial Partner – Winner
Department of Trade, Industry and Competition, Pretoria, South Africa
Technology Award recognising outstanding support to an industrial partner through the THRIP research and innovation programme.
2008, Excellence in Water Research
Water Institute of Southern Africa, Pretoria, Gauteng, South Africa
Excellence in Water Research
2006, SAIWA Award – Major Contribution to Industrial Water Technology
Water Institute of Southern Africa, Pretoria, South Africa
Award recognising a major contribution to industrial water technology.
2003, CSIR Commercialization Award
Council for Scientific and Industrial Research, Pretoria, South Africa
Award recognising successful technology development and commercialisation arising from water-treatment research.
Senior Fellow
Water Institute of Southern Africa, Pretoria, South Africa
Appointer as a senior fellow
Professional Scientist
SACNASP, Pretoria, Gauteng, South Africa
Profession Scientist (Pr.Sci.Nat.)
Experience
Professor, Institute for Nanotechnology and Water Susttainability (iNanooWS)
University of South Africa, Pretoria, South Africa
01 Feb 2023 - 30 Aug 2026
Founder, Director
ROC Water Technologies (Pty) Ltd, Pretoria, South Africa
01 Feb 2016 - 30 Aug 2026
Consultant
Phillert Trust, Pretoria, South Africa
01 Sep 2015 - 30 Aug 2026
Professor, Department of Water and Sanitation
University of Limpopo, Polokwane, South Africa
01 Aug 2018 - 31 Dec 2022
Professor, Rand Water Chair in Water Utilization
Tshwane University of Technology, Pretoria, South Africa
01 Jul 2007 - 31 Aug 2015
Researcher, Research Group Leader, Divisional Fellow
Council for Scientific and Industrial Research, Pretoria, South Africa
01 Feb 1976 - 30 Jun 2007
Ph.D. Chemical Engineering
North-West University, Potchefstroom, South Africa
01 Jan 2004 - 22 Sep 2006
Ph.D., Chemistry
University of the Free State, Bloemfontein, South Africa
01 Jan 1985 - 16 Sep 1988