Nationality: South African
Profession: Chemical Engineer & Water Consultant
Specialisation: Industrial Effluent Management, Design of DAF plants, Membrane Technology, Water & Wastewater Management, Training of Water Professionals
Position in last firm (Water Research Commission): Research Manager: Water Treatment Technology, Membrane Development, Rural Water Supply, Head of the Domain: Water and Health
Currently: GO Water Management (own enterprise), since 2008
Year of birth: 1948
KEY AREAS OF EXPERTISE AND CAPABILITIES
• Design of DAF plants for potable water, industrial effluent and wastewater applications
(See list of DAF plants designed further down)
• Training of water professionals in water and effluent treatment (See list of courses further down)
• Assistance to industries in lowering industrial water discharge costs to the Municipality
• Any water & industrial water related surveys and associated solutions
• Water treatment technology and processes assessment or selection
EDUCATION AND PROFESSIONAL STATUS
BSc Eng. (Chem) University of Pretoria 1971
B Eng. (Hons.) (Water Utilization Eng.) University of Pretoria 1987
PhD (Engineering Management) University of Pretoria 1996
ECSA registered Professional Engineer (No 740322)
Water Institute of Southern Africa (Senior Fellow, No 20039)
Institute of Municipal Engineering of Southern Africa (Member, No O3411)
LANGUAGES
Afrikaans, English, German, some French
RECENT AND CURRENT PROJECTS
Some examples of recent projects executed or in progress since leaving the Water Research Commission in 2008:
- Extensive experience in various membrane
related pilot and other studies on both fresh water treatment and saline
water desalination, especially together with Ikusasa Water membrane supply
company (2008 – 2016). (Dr Ian Goldie, ex Business Manager, Ikusasa Water,
083 270 4506)
- Process selection and design assistance
to Moedi Consulting Engineers in designing the 15 Ml/d water treatment
plant for Delmas. (Mr Marx Jordaan, 082 783 1378)
- A review of water treatment processes
applicable for rural and community water supply in South Africa (2009).
Study performed for Overberg Water/Masimbambane. (Mr Danie Theron, ex Overberg
Water, 082 822 3146)
- Treatment of spent waste grain at the
Sedgwick whiskey distillery, Wellington (2009). DAF and settlement studies
performed for Distell. (Mr Jacques Blignaut, ex Waste Management, Distell,
083 627 2247)
- Treatment of the effluent at the
Parmalat, Bonnievale, production plant. (From 2008, but ongoing).
Assistance with Dissolved Air Flotation for Water &
Wastes Utilisation Solutions. (Mr Buks Schutte, 082 902 2947)
- Compilation
of a Water Safety Plan for Stellenbosch Municipality in conjunction with
Chris Swartz Water Utilization Engineering as project managers (2010) (Mr
Ronald Brown, 072 561 2257)
- Compilation
of Water Safety Plans for Cape Agulhas Municipality’s water treatment systems
in conjunction with Chris Swartz Water Utilization Engineering as project
managers (2011) (Mr Walter Linnert, 072 047 8248)
- Member of
project research team in the following Water Research Commission (WRC)
projects:
Development of a prototype nanotechnology-based clay filter pot to purify water for drinking and cooking in rural homes, K8/810 (Project Leader: Prof Maggy Momba, 082 513 7396).
Compilation of guidelines for the selection and use of home water treatment systems and devices, K5/1884 (Project Leader: Prof Maggy Momba, 082 513 7396)
Guidelines on Determining the Vulnerability and Risks of Water Services Infrastructure, K5/1893 (Project Leader: Mr Grant Mackintosh, Emanti Management, 082 327 3357)
Development of a costing model to determine the cost-efficiency and energy effficiency of water treatment technologies and supply options, K5/1992 (Project Leader: Mr Chris Swartz, Chris Swartz Water Utilization Engineers, 082 820 4481)
Decision-support model for the selection, costing and application of drinking water treatment and supply options to address water shortages and improve water services delivery (with focus on upgrading options, water relamation and desalination), K5/2119 (Project Leader: Mr Chris Swartz, Chris Swartz Water Utilization Engineers, 082 820 4481).
- Due
Diligence Report on the level of success of the water related activities
of a large Water Services provider group in Gauteng for loan application
purposes (2011). Study performed for Pine Bridge Investments, New York.
(Information regarding the study will only be provided under agreement of
confidentiality)
10. Investigation into the feasibility of a water reclamation plant for
the reuse of sewage effluent at the Alexandria sewage treatment plant and
recommendations for the way forward (2011). Project executed for Ndlambe
Municipality (Mr Xolani Masiza, Director Infrastructure, 083 500 0766)
11. Investigations into problems experienced with
the reverse osmosis membrane system at the Biovac Institute (2011). Project
executed on behalf of Project Assignments, Cape Town, to investigate loss in
pure water production volumes and provide recommendations to solve the
problems. (Mr John Jellicoe, ex Project Assignments Project Manager, 078 853
1935)
12. Training of 230 process controllers in the
Western Cape by means of presentation to nine centres in the province,
utilising the Telematic Centre at the University of Stellenbosch. Course given and assessed: aspects of SETA Unit
Standard 246450: Demonstrate knowledge of the water treatment process, as well
as general presentations on water management. (Chris Swartz, Chris Swartz Water
Utilization Engineers, 082 820 4481)
13. Training on NQF 02 level
of process controllers for Drakenstein Municipality with Chris Swartz Water
Utilization Engineering. Course given and assessed: SETA Unit Standard 246450:
Demonstrate knowledge of the water treatment process. (Mr André Kowalewski, Drakenstein
Municipality, 021 807 4705)
14. Execution of a project
for Ikusasa Water to concentrate tea extract for polyphenols and anti-oxidant
recovery using ultrafiltration and reverse osmosis pilot plants (2013). The
work was done for the CSIR as client. From the pilot study, specifications were
drafted for a demonstration plant. (Dr Ian Goldie, ex Business Manager, Ikusasa
Water, 083 270 4506)
15. Assisting with membrane
development work with HySA Systems, Dept of Chemistry, University of the
Western Cape, regarding improved membranes for gas extraction from flue gas
(Prof Ben Bladergroen, 021 959 9309)
16. Involved with membrane
development work with HySA Systems, University of Cape Town, Chemical
Engineering, regarding improved membrane systems for fuel cells (Mr Shiro
Tanaka, 021 650 3852)
17. Assistance with, and
finalisation of, technical reports and publications for various scientists and
engineers. (Prof Ben Bladergroen, 021 959 9309; Prof Leslie Petrik, Dept
of Chemistry, UWC, 021 959 3878; Dr Willem de Clercq,
Soil Science, Stellenbosch University, 021 808 4793; Dr Pia Lipp and Dr
Stephan Stauder, Technologiezentrum Wasser, Karlsruhe, Germany, +49
721 967 8127).
18. Report with
recommendations on the Process Design of the Driekoppies and Masibekela
(Sibange) Water Treatment Works. 2012. (Study done for Lubisi Consulting,
Chalmers Pagiwa, 013 752 6416)
19. Performed Blue Drop
audits for the Department of Water Affairs at municipalities in the in the
Western Cape (2009) and in Eastern Cape, Free State and KwaZulu Natal during
the 2012/13 Blue Drop audit year.
20. Design and costing of a
104 Ml/d membrane plant for the indirect potable reuse of the Darvill sewage
works effluent – a feasibility study for BigenAfrica.. 2013. (Dr Mias van der
Walt, 012 843 9085)
21. Execution of an
investigation into the occurrence of copper tube pit corrosion in the Mossel
Bay area and recommendations as to the alleviation of the problem. Confidential
report to the Mossel Bay Municipality, 2014. (Mr Eric Louw, 044 606 5270)
22. Execution of a pilot
study for the removal of iron and manganese from groundwater for use as potable
water by the Kouga Municipality. Study performed to obtain design information
for a planned new water treatment plant for Jeffreys Bay, 2016. (Report to Kouga
Municipality and Water & Pump Solutions, Mr Nell Potgieter, 082 656 5306)
23. Design of a 6.5 Ml/d iron
and manganese removal plant for the supply of potable water to Jeffrey’s Bay
(Kouga Municipality and Water & Pump Solutions, Mr Nell Potgieter, 082 656
5306)
24. Upgrade of the 500 m3/d
Bathurst Water Treatment Plant. (2016) Design of coagulation/flocculation,
lamella settling and filtration systems. (Water & Pump Solutions, Mr Nell
Potgieter, 082 656 5306)
25. Design of a 840 m3/d
biotower stripping system for the removal of hydrogen sulphide from ground
water, Janssenville. (Water & Pump Solutions, Mr Nell Potgieter, 082 656
5306)
26. Design of a 240 m3/d
dissolved air flotation system and assistance in plant design for a laundry
effluent water recovery and reuse system. (Dr Ian Goldie, Business Manager,
Ikusasa Water, 083 270 4506)
27. Design of a 960 m3/d
dissolved air flotation system as pre-treatment to membrane filtration for
potable water supply to the town of Pearly Beach, Western Cape. 2017 (Dr Ian
Goldie, ex Business Manager, Ikusasa Water, 083 270 4506)
28. Design of a 200 Ml/d DAF
system as pre-treatment for membrane seawater desalination. Done for Aveng
Water as part of a feasibility study. 2018 (Annamarie Vlok, 010 205 1047/072
590 7979)
29. Facilitation of a two-day course
on Membrane Water Treatment, a one-day specialist and design course on
Dissolved Air Flotation, a two-day specialist courses on Process Selection and
Application in Drinking and Industrial Water Treatment, a two-day course on
Water Quality & Treatment and Water Safety Planning, a two-day course on
Management & Treatment of Domestic and Industrial Wastewater, on-going from
2016 onwards
30. Design of a 13 kl/h DAF system for
the Texcare Laundry water recovery plant. 2019. (Mr Cobus Olivier, Kainos
Projects Africa, 082 873 2612)
31. Design of an 8.3 Ml/d DAFF (Dissolved Air
Flotation-Filtration) upgrade at the Meulwater drinking water treatment plant, Drakenstein
Municipality. 2019 (Geoff du Toit, Zutari, 082 296 0712)
32. Design of a 280 kl/d DAF plant for
the pre-treatment of laundry effluent before further UF and RO clarification.
(Mr Leon Croukamp, Coral Clean Laundries, 021 946 2234)
33. Design of a 120 kl/d DAF
plant for the treatment of Pioneer Foods fruit effluent (Mr Cobus Olivier, Kainos Projects
Africa, 082 873 2612)
34. Renovation and upgrade of a 1 Ml/d
DAF system for the treatment of fruit effluent for Granor Passi, Letsitele. (Mr
Dirk Cloete, International Water Technologies, 082 772 1602)
35. Design of a 2.5 Ml/d DAF treatment plant on
liquor production effluent from a bio-reactor (Mr Francois le Roux, Tecroveer,
082 338 4309)
36. Feasibility study and proposal for
the treatment of Cookhouse Dairy effluent before disposal by irrigation (Report
to Water & Pumping Solutions, Mr Nell Potgieter, 082 656 5306)
37. Design of a 25 m3/h DAF plant for the
treatment of chicken rendering plant effluent and recovery of by-products (Mr
Jacques Fourie, Tesla Water, 082 964 4199)
38. Investigation and report with
recommendations to make the 150 m3/h Rainbow Chicken DAF plant, Hammarsdale,
fully operational again (Mr Francois le Roux, Tecroveer, 082 338 4309)
39. Investigation and report with
recommendations to rectify and upgrade five DAF plants at four fish processing
plants in Walvis Bay, Namibia. (Mr Frank Kernstock, Hepwater, +264 81 149 2329)
40. Design of a 4 m3/h DAF plant plant
for the treatment of algal dam water to drinking water (Mr Luan Schoeman, Utico
Water, 082 854 1427)
41. Investigation with recommendations
on how to improve the design and functioning of the sewage sludge thickener DAF
plant at the Olifantsfontein sewage works, ERWAT, 2023. (Mr Pierre Marais, Water
and Wastewater Engineering, 082 870 1988)
42. Investigation with recommendations for the renovation and improvement of the 5 Ml/d Amawandle Pelagic Fisheries Dissolved Air Flotation (DAF) effluent treatment plant. (Mr André Viljoen, Amawandle Pelagic Fisheries, 083 308 6094)
43. Feasibility study and design of a 2.8 Ml/d DAF based effluent treatment plant for Pioneer Fishing, St Helena Bay. 2025. (Mike van den Heever, Pioneer Fishing, 082 446 2014)
44. Study and design for the upgrading of the Pioneer
Fishing effluent treatment plant from 2. 8 Ml/d to 5.3 Ml/d. 2026. (Mike
van den Heever, Pioneer Fishing, 082 446 2014)
LIST OF DISSOLVED AIR FLOTATION PLANTS DESIGNED
|
PLANT |
YEAR |
DESCRIPTION |
|
Pilot
DAFF |
1983 |
24 m3/d fully
adjustable DAFF (Dissolved Air Flotation/Filtration (DAF on top of sand
filter) for research and pilot plant purposes (CSIR) |
|
Van
Leer Industries |
1984 |
1.9 Ml/d paper effluent treatment
(for Explochem Water Treatment) |
|
AEC |
1985 |
7 Ml/d phosphate removal plant
(Van Wyk & Louw) |
|
UCOR |
1985 |
20 Ml/d secondary sewage effluent
reclamation (Explochem) |
|
Zeekoegat |
1987 |
7 Ml/d secondary sewage effluent
reclamation (Babcock) |
|
Daspoort
Sewage Works, Pretoria |
1989 |
Thickening of sewage sludge
(Biwater) |
|
Centurion
Sewage Works, Pretoria |
1989 |
Thickening of sewage sludge
(Biwater) |
|
Unilever |
1990 |
500 m3/d plant oil
treatment & recovery (Explochem) |
|
Fishwater
Flats |
1993 |
7.8 Ml/d secondary sewage effluent
reclamation (Explochem) |
|
Sappi,
Stanger |
1993 |
3.6 Ml/d paper effluent treatment
plant (Explochem) |
|
Taiwan
fisheries DAF |
1993 |
700 m3/d oily water
treatment (Explochem) |
|
Packo |
1994 |
500 m3/d food
processing effluent (Explochem) |
|
Mauritius
Laundry |
1994 |
600 m3/d laundry water
treatment & reclamation (Explochem) |
|
Belgotex |
1994 |
620 m3/d textile
effluent treatment (Explochem) |
|
SADAFCO,
Jeddah, Saudi Arabia |
1994 |
600 m3/d dairy effluent
treatment plant (Explochem) |
|
SADAFCO,
Jeddah, Saudi Arabia |
1994 |
500 m3/d dairy effluent
treatment plant (Explochem) |
|
Unilever,
Malawi |
1994 |
1 Ml/d plant oil effluent
treatment (Explochem) |
|
Unilever,
Kenia |
1994 |
2.1 Ml/d plant oil effluent
treatment (Explochem) |
|
Zambia
Dairies, Zambia |
1994 |
600 m3/d dairy effluent
treatment (Explochem) |
|
DV
Harris, Umgeni Water |
1995 |
30 Ml/d drinking water treatment
from eutrophic source (plant ran
successfully but source since changed to avert the use of activated carbon
and plant not in use any more) |
|
Wiggins,
Umgeni Water |
1995 |
5 Ml/d water works sludge thickening
(Explochem) |
|
Kriel
Power Station, ESKOM |
1995 |
6 Ml/d treatment of cooling tower
blow-down water (Explochem) |
|
Dyehouse
effluent |
1996 |
1.8 Ml/d dye house effluent
treatment (Explochem) |
|
Vridi
|
1996 |
650 m3/d oily water
treatment (Explochem) |
|
Umbilo
Sewage Works |
1997 |
900 m3/d sewage sludge
thickening plant upgrade (Treffry-Goatley & Assoc) |
|
Oily
water, Talbot & Talbot |
1997 |
5.4 Ml/d oily water treatment
plant (Talbot & Talbot) |
|
Temba
Sewage Works, Pretoria |
1998 |
2.6 Ml/d thickening of sewage
sludge (Lektratek Water) |
|
Wastewater
reclamation, Foster-Wheeler |
2002 |
650 m3/d wastewater
reclamation plant (Foster-Wheeler) |
|
Bench
DAF |
2003 |
Design of a bench unit for DAF
evaluation studies (Improchem) |
|
Pilot
DAF |
2004 |
Design of a 1 m3/h DAFF
(DAF on top of a sand filter) pilot plant for general pilot studies
(Improchem) |
|
Sappi,
Mandini |
2004 |
425 m3/d treatment of
paper effluent part-stream (Lektratek) |
|
Rainbow
Chicken |
2004 |
200 m3/d chicken
processing plant effluent treatment (Total Water Management) |
|
SAPREF |
2004 |
4.5 Ml/d oil removal and recovery
plant (Improchem) |
|
Plettenberg
Bay, Bitou Mun |
2005 |
10 Ml/d DAF for drinking water
treatment |
|
Caltex |
2005 |
2.4 Ml/d petroleum wastewater
treatment plant (Improchem) |
|
Roodeplaat,Tshwane |
2007 |
600 m3/d eutrophic
water treatment plant (Purion) |
|
Pilot
DAF |
2014 |
20 m3/d DAFF (DAF on
top of a sand filter) pilot plant for general pilot studies (Explochem) |
|
Oily
water DAF, SOIL, Swellendam |
2015 |
72 m3/d effluent
treatment plant for oil removal (Alveo Water). |
|
DAF
system for SPP Canning, Hermanus |
2015 |
120 m3/d effluent abalone
effluent treatment plant (Alveo Water) |
|
Oakland
Dairy, Cape Town |
2015 |
120 m3/d dairy
wastewater treatment (Alveo Water) |
|
Dairy
effluent DAF |
2016 |
Renovation and upgrade of a 600 m3/d
dairy effluent treatment plant (Dairy Day) |
|
Laundry
Effluent DAF |
2017 |
240 m3/h DAF for the
pre-treatment of a laundry effluent before UF & RO (Ikusasa Water) |
|
Pearly
Beach DAF |
2017 |
960 m3/d high-rate
lamella DAF for pre-treatment to membranes for drinking water Ikusasa Water) |
|
Plastics
effluent DAF |
2018 |
300 m3/d DAF for the
treatment of a plastics recovery effluent (Alveo Water) |
|
Laundry
Effluent DAF |
2018 |
300 m3/d DAF for the
pre-treatment of a laundry effluent before UF & RO (Kainos Africa (Pty)
Ltd) |
|
Meulwater
DAFF |
2019 |
8.3 Ml/d DAFF plant for drinking
water treatment at Drakenstein Municipality (Aurecon) |
|
Pioneer
Foods DAF |
2019 |
120 m3/d DAF system for
fruit processing effluent treatment. (Kainos Africa (Pty) Ltd) |
|
Fruit
Processing Effluent DAF |
2019 |
Renovation and upgrade of a 1 Ml/d
fruit effluent treatment plant (International Water Technologies) |
|
Distell
bioreactor effluent DAF |
2020 |
2.5 Ml/d DAF treatment of liquor
production effluent from a bio-reactor (Tecroveer) |
|
Country
Fair chicken abattoir effluent |
2020 |
600 m3/d Econo-DAF
plant for the treatment of chicken rendering plant effluent and recovery of
by-products (Tesla Water) |
|
Darling
Creamery DAF |
2020 |
240 m3/d DAF for the
pre-treatment of dairy effluent before membranes (Kainos Africa) |
|
Meerlust
drinking water DAF |
2021 |
100 m3/d DAF plant
plant for the treatment of algal dam water to drinking water (Utico Water) |
|
Algae
water DAF |
2021 |
240 m3/d Econo-DAF
plant plant for the treatment of algal dam water to drinking water (PCM
Consulting) |
|
Pepsico
chip effluent DAF |
2022 |
340 m3/d DAF plant for
the treatment of chip-making effluent (Talbot) |
|
In2Food,
Benoni, effluent |
2022 |
85 m3/d Econo-DAF plant
for the treatment of food effluent (BB Water) |
|
Ink
effluent DAF |
2022 |
5 m3/d Econo-DAF plant for ink effluent treatment
(Brenton Water) |
|
CBH
Chicken abattoir product recovery DAF |
2022 |
1 440 m3/d DAF
Econo-DAF system for the recovery of fat and proteins from a chicken abattoir
effluent (Superior Systems) |
|
Twinsaver
sec sewage purification DAF |
2023 |
1 400 m3/d Econo-DAF
system for the pre-treatment of secondary sewage effluent before membranes
(AECI Water) |
|
Harmony
DAF |
2023 |
1 800 m3/d Econo-DAF system
for the treatment of surface water for
mining process water use (AECI Water) |
|
Kelloggs
effluent treatment DAF |
2023 |
120 m3/d Econo-DAF
system for the treatment of wastewater from the Kelloggs, Extrupet, plan
(Chemal Chemical Trading) |
|
Food
effluent DAF |
2023 |
50 m3/d Econo-DAF
system for the treatment of a food effluent (G-Chem Aquacare) |
|
Gymnasium
effluent water DAF |
2024 |
72 m3/d DAF system for
the treatment of Gym effluent (WEC Projects) |
|
DAF
for surface water treatment for irrigation |
2024 |
680 m3/d Econo-DAF system
for the treatment of surface water for vegetable production (Heat Exchange Projects,
Namibia) |
|
DAF
for surface water treatment for irrigation |
2024 |
860 m3/d Econo-DAF system
for the treatment of surface water for vegetable production (Heat Exchange
Projects, Namibia) |
|
Avocado
processing effluent DAF |
2024 |
220 m3/d Econo-DAF system
for the treatment of avocado processing effluent (The Water Boys) |
|
Fish
processing effluent DAF |
2025 |
1 400 m3/d Econo-DAF
system for the treatment of fish processing effluent and valuable product
recovery (Pioneer Fishing) |
|
Food
effluent treatment DAF |
2025 |
72 m3/d Econo-DAF for the
treatment of a bakery effluent |
| Fish processing effluent treatment DAF | 2026 | 2 400 m3/d Econo-DAF system expansion for the treatment of fish processing effluent (Pioneer Fishing) |
| Drinking water treatment DAF | 2026 | 200 m3/d Econo-DAF plant for the supply of drinking water from Vaal River feed water (BB Energy) |
| Abattoir effluent treatment DAF | 2026 | 72 m3/d Econo-DAF for the treatment of a chicken abattoir effluent (Clearedge) |
LIST OF
TRAINING COURSES PROVIDED (In-house/On-line)
These courses are presented on a regular basis, on
request.
|
COURSE |
CPD CREDITS |
|
Specialist Course in Dissolved Air Flotation
for Water & Wastewater Treatment (1 day) |
1 |
|
Membrane Technology & Application for
Water & Wastewater Treatment (2 days) |
2 |
|
Drinking Water Quality and Treatment &
Water Safety Planning (2 days). |
2 |
|
Management and Treatment of Domestic and
Industrial Wastewater (2 days) |
2 |
2008- Present: GO Water Management
General consulting work, trading as GO Water Management. Specialising in Dissolved Air Flotation and membrane related projects. Up to a two years ago involved with Ikusasa Water on a part-time basis to promote South African-developed ultrafiltration membranes for rural water supply, as well as in the general application of membranes. Specialising in water reclamation and water, mining water & industrial effluent treatment using DAF and membranes. Performing of general water, water reclamation, mine water and effluent related projects as an independent consultant. Involved with water treatment personnel training, the improvement of drinking water supply and the achievement of Blue Drop status in a number of rural towns in the Western Cape and the Free State. Assisting with, and examining of, post-graduate students and their theses.
1989- 2008: Water Research Commission:
Funding and management of research projects in the fields of drinking water, municipal waste water and industrial effluents. More than 100 projects were finalised in this period.
Development and use of decision support systems. Performing of strategic planning.
Process design of dissolved air flotation plants and solving of water treatment problems.
Liaison with international organisations through the Global Water Research Coalition and “Emerging Technologies” with the AWWA Research Foundation. The focus areas were water purification and water reclamation. Involved in compiling the latest WateReuse Foundation Report Direct Potable Reuse – the way forward, Tchobanoglous et al. Involved with WHO in establishing Water Safety Plans as tool for improved drinking water supply.
1982-1988-Division of Water Technology, CSIR:
Development of water-related products for and in conjunction with outside clients. Most of these activities revolved around the CSIR processes for Acid Mine Drainage treatment.
Execution of water and effluent treatment projects and general water treatment development work, with specialization in Dissolved Air Flotation development and process design.
Execution of mining and industrial water management projects for industry. More than 60 projects were undertaken during this period.
1978-1982: Chemical Engineering Research Group, CSIR:
Computer-aided design of heat exchangers for industry.
Purchase, adaptation and maintenance of overseas heat exchanger and process design programmes. General chemical engineering projects for outside clients.
1973-1978: Uranium Enrichment Corporation:
Commissioning and operation of pilot uranium enrichment plants.
Writing of the commissioning handbook for the uranium enrichment demonstration plant.
Commissioning, and later operation, of the feed, waste and hydrogen plants as well as half of the enrichment capacity of the uranium enrichment plant.
1971-1973: SASOL oil-from-coal plant:
Material balances; plant optimisation studies; design of heat exchangers and pumping systems on the Phenosolvan, Nitrogen and Water and Effluent plants at SASOL I.
Member of the design team with Lurgi, responsible for process design of the El Paso and Panhandle oil-from-coal plants, Texas.
PUBLICATIONS AND REPORTS
Below is a list of reports and publications concerning a variety of water and effluent treatment, strategic planning and decision making papers since becoming involved with water and wastewater management:
1. Offringa G and Prinsloo J (1982) Removal of suspended solids in final effluent at Sappi Kraft Paper Mill, Mandini. NIWR Con¬tract Report, Pretoria, November
2. Offringa G (1983) Treatment of Rustenburg Platinum Mine Process Water. NIWR Interim Report, Pretoria, January
3. Offringa G, van Vuuren LRJ and Carstens P-A du T (1983) The water supply and effluent situation at Da Gama Textile Company (Pty) Ltd, East London, during 1982/83 and proposals to reduce water intake and effluent pollution load. NIWR Progress Report No. 4, Pretoria, April
4. Offringa G (1983) Reuse of Dekama treated municipal wastewater by Scaw Metals Limited. NIWR Contract Report, Pretoria, April
5. Offringa G (1983) Preliminary investigations into biological growth in tailing dams underdrains at Bafokeng, Impala Platinum Limited, NIWR Contract Report, Pretoria, April
6. Offringa G and Turner J (1983) Treatment of seawater at Alusaf. NIWR Contract Report, June
7. Offringa G (1983) Corrosion inhibition of PM4 and PM5 vacuum pump sealing water system at Mondi Paper Company Limited, Merebank. NIWR Contract Report, Pretoria, July
8. Offringa G and de Fanti R (1983) The water supply and effluent situation at Mondi Paper Company Ltd, Merebank, Durban. NIWR Progress Report No. 14, Pretoria, August
9. Van Vuuren LRJ and Offringa G (1983) Effluent treatment and water reuse in die pulp and paper industry. Paper presented at Seminar: Water Conservation. Northern Transvaal Chamber of In¬dustries, Pretoria, 18 August
10. Offringa G (1983) The water supply and effluent situation at Mondi Board Mills, Springs, and recommended approach to alleviate some problems experienced. NIWR Progress Report No. 5. Pretoria, October
11. Offringa G, Scheepers J and van Vuuren LRJ (1983) Dissolved air flotation pilot test runs on Rotofloc overflow at Mondi Board Mills, Felixton. NIWR Contract Report, Pretoria, October
12. Offringa G, van Vuuren LRJ, Ross WR, Airey DD and Connell AD (1983) Abatement of environmental pollution of final effluent from Mondi Board Mills, Felixton. NIWR Draft Contract Report, Pretoria, October
13. Offringa G and Vennekens MJA (1983) Treatment of effluent at Mondi Timber Mills, Sabie. NIWR Status Report, December
14. Offringa G and Botha GR (1984) Proposed new system for water savings on the cucumber washing line for Irvin and Johnson Ltd, Benrose. NIWR Project Report, January
15. Offringa G (1984) Water and effluent management by Mondi Board Mills, Bellville. NIWR progress Report, January
16. Offringa G (1984) Water and effluent management by Mondi Board Mills, Umgeni. NIWR progress Report, January
17. Offringa G (1984) Treatment of Rustenburg Platinum mine water. Paper delivered at the Water Symposium, Rustenburg Platinum Mine, 8 February
18. Offringa G (1984) Dissolved air flotation trials at Sappi Cape Kraft (Pty) Ltd, Milnerton. NIWR contract Report, February
19. De Vries PM van Wyk, Vennekens M, Carstens P-A du T, Offringa G (1984). Investigation into the reclamation of sewage and mine water at Kloof Mine, Gold Fields of South Africa Ltd. NIWR contract Report, February
20. Offringa G, van Vuuren LRJ and Render D (1984) Survey of effluent systems at Da Gama Textile Company (Ltd), East London. NIWR contract Report, March
21. Offringa G, van Vuuren LRJ, Ross WR, Airey DD and Connell AD (1984) Abatement of environmental pollution of final effluent from Mondi Board Mills, Felixton, NIWR Final Contract Report, Pretoria, March
22. Offringa G (1984) Comments on the Karper Engineering Ltd. Report: Jan Tshatshu and Makalaka study. NIWR project Report, September
23. Offringa G (1984) Dissolved air flotation in water treatment. Paper delivered at the NIWR/IWPC/WRC Symposium on Purification and Distribution of Water, Pretoria, 18 October
24. Offringa G and De Fanti R (1984) The water supply and effluent situation at Mondi Paper Company Limited, Merebank, Durban. NIWR Progress Report No. 15, Pretoria, July
25. Offringa G, Van Vuuren LRJ, Carstens PA du T and Iles T (1984) The water supply and effluent situation at Da Gama Tex¬tile Company (Pty) Ltd., East London, during 1983/1984 and proposals to reduce water intake and effluent pollution load. NIWR Progress Report No. 15, Pretoria, July
26. Vennekens MJA and Offringa G (1985) Treatment of effluent at Mondi Saw Mills, Northern Mill, Graskop. NIWR Progress Report No. 2. January
27. Offringa G, Vennekens MJA and Carstens P-A du T (1985) Reuse of Diepsloot secondary effluent as make-up water in the UCOR cooling water system. NIWR Contract Report. March
28. Offringa G (1985) Survey of the effluent system at Da Gama Textile Company (Ltd), East London. NIWR Status Report. March
29. Offringa G, Vennekens MJA, Scheepers JA and Carstens P-A du T (1985) UCOR: Treatment of final effluent. NIWR Contract Report. June
30. Offringa G, Vennekens MJA, Carstens P-A du T and Iles T (1985) The water supply and effluent situation at Da Gama Textile Company (Pty) Ltd, East London, during 1984/85 and Proposals to reduce water intake and effluent pollution load. NIWR Progress Report No. 6. May
31. Offringa G (1985) Dissolved air flotation treatment of final effluent from three South African Board Mills. Paper presented at the Symposium Forest Products Research International - Achieve¬ments and the Future, Pretoria, 22-26 April
32. Van Vuuren LRJ, Offringa G and Williams PG (1985) Development and application of DAF technology in South Africa. The Institute of Water Pollution Control Year Book 1985
33. Offringa G, Vennekens MJA and de Fanti (1985) The water supply and effluent situation at Mondi Paper Company Limited, Merebank, Durban. NIWR Progress Report No.17. July
34. Offringa G and Van Vuuren LRJ (1985) Conversion of the existing Mondi Board Mills, Felixton effluent treatment plant into a 2 Ml/d water treatment plant. NIWR Project Report. October
35. Brabyn NR, Smith EJ, Davies CJ, Bindoff AL, GrovesGR and Offringa G (1985) Technical performance evaluation of treatment processes for the recycling of paper machine wastewater. Paper presented at Symposium Forest Products Research Interna¬tional Achievements and the Future, Pretoria, 22-26 April.
36. Van Steenderen RA and Offringa G (1985) Chemical survey of the Ngagane catchment area and the Iscor Newcastle water purifica¬tion works. NIWR Project Report. October
37. Offringa G and Scheepers JA (1985) Removal of algae by dissolved air flotation at Swartwater Dam, Qwaqwa. NIWR Contract Report. November
38. Offringa G (1985) Dissolved air flotation treatment of final effluent from three South African board mills. Paper Southern Africa, 6(1)
39. Offringa G and Vennekens MJA (1985) Evaluation of the effluent treatment plant at Mooi River Textiles. NIWR Contract Report. February
40. Offringa G, Vennekens MJA, Carstens P-A du T, de Fanti R and Orbin AE (1986) The water supply and effluent situation at Mondi Paper Company Limited, Merebank, Durban. NIWR Progress Report No. 18, Pretoria, February
41. Offringa G and Coopmans EJA (1986) Phosphate removal from Johannesburg northern sewage works` secondary effluent by dis¬solved air flotation. Municipal Engineer, 17(5), 19-25
42. Offringa G, Vennekens MJA, Botha A, Carstens P-A du T and Schoonbee A (1986) Upgrading of the SAPPI, Enstra dissolved air flotation plant from 20 Ml/d to 30 Ml/d. NIWR Contract Report. August
43. Offringa G, Botha A, Schutte IB and Schoonbee A (1986) Pretreatment of Iscor, Pretoria, effluent by dissolved air flota¬tion. NIWR Contract Report. October
44. Offringa G, Le Roux JD, Botha A and Van Steenderen RA (1987) NIWN-ondersoeke : Vaalkopskema, WNNR Statusverslag, Pretoria, NIWN, Januarie
45. Offringa G and Carstens P-A du T (1987) The potential use of coal ash in structured reed beds for effluent treatment. Paper presented at International Symposium Ash - a valuable resource, Pretoria, 2-6 February
46. Offringa G, Vennekens MJA, De Villiers HA and Botha A (1987) Dissolved air flotation studies in the pulp and paper in¬dustry. Presented at the Biennial IWPC Conference, Port Elizabeth, 12 to 15 May
47. Heymann JB, Offringa G, Van Steenderen RA and Botha A. (1987) Treatment of effluent from the Karbochem, Newcastle, syn¬thetic rubber plant. CSIR Contract Report, Pretoria, NIWR. March
48. Offringa G, Vennekens MJA, Schoonbee A, De Fanti R and Orbin A (1987) The water supply and effluent situation at Mondi Paper Company Limited. Merebank, Durban, NIWR progress Report No. 21. March
49. Van Vuuren LRJ, Offringa G, Le Roux JD and Van Steenderen RA (1987) NIWN-ondersoek : Vaalkop- waterskema, WNNR Statusverslag No. 2, Pretoria, NIWN, April
50. Offringa G and Van Vuuren LRJ (1987) Treatment of eutrophic water. Paper presented at Simposium Hartbeespoort Dam Quo vadis?, Pretoria, September 1
51. Offringa G (1988) The control of microbiological growth in heat exchange systems. CHEMSA, 14(5), 145-147
52. Offringa G (1988) Die ingenieur in diens van die waternywerheid. Archimedes 30(4), 16-18
53. Botha A, Offringa G and Whyte D (1989) Development of an integrated flocculation system specifically aimed at batch water treatment systems for small users. CHEMSA, 15(3), 91-95
54. Offringa G (1990) Treatment of eutrophic waters in South Africa. SA J. of Science, 86(1), pp.6-8
55. Offringa G (1992) Strategic Plan for Research on Potable Water in South Africa. Water Research Commission, Pretoria, South Africa
56. Gehr R, Swartz C and Offringa G (1993) Removal of trihalomethane precursors from eutrophic water by dissolved air flotation. Wat. Res., 27(1), pp 41-49
57. Offringa G (1994) Dissolved Air Flotation in Southern Africa. Paper presented at IAWQ - IWSA - AWWA - Joint Specialized Conference on Flotation Processes in Water and Sludge Treatment, Orlando, Florida, USA, 26-28 April
58. Offringa G (1996) A Decision Support Model for the Determination of Water Research Priorities. PhD Thesis, University of Pretoria, Pretoria, South Africa
59. Offringa G and De Wet G. (1996) A Quality of Life-based Decision Support Model for the Determination of Water Research Priorities. Water SA, 22 (4), pp359 - 372
60. Offringa G (2000) Membrane Development in South Africa. Membrane Technology, 119, pp 4-7
61. Offringa G (2004) Water Supply in South Africa – formidable challenges and innovative solutions. Presented at The 2nd International Implementation Conference on Safe Water for Improving Health, Gallagher Estate, 4-7 November
62. Offringa G, Mjoli N, Venter SN, Kfir R and Moolman A (2007) A New Strategic Framework for Water-related Health Research. Water SA, 33 (5), pp589 - 592
63. Offringa G and Swartz CD (2009) A Review of Water Treatment Processes Applicable for Rural and Community Water Supply in South Africa. Internal Report for Overberg Water/Masimbambane, March
64. Offringa G (2009) Report on the treatment of spent grain centrate at Sedgwick Distillery. Internal Report to Distell, June
65. Offringa G (2009) UF Solution to Rural Water Supplies? Desalination & Water Reuse, 1914, pp 26 – 29
66. Offringa G and Schmollgruber E (2011) Close-out report for the Alexandria wastewater reclamation works. Report to the Ndlambe Local Municipality
67. Offringa G, Theron D and Linnert W (2011) Ensuring Blue Drop water quality with the use of membrane ultra-filtration technology. Presented at the 3rd Municipal Water Quality Conference, Cape Town International Convention Centre, 27 June – 1 July
68. Momba MNB, Offringa G, Nameni G, Brouckaert B (2010) Nanotechnology-based clay filter pot to purify water in rural homes. Research Report No KV 244/10, Water Research Commission, Pretoria
69. Mwabi JK, Adeyemo FE, Mahlango TO, Mamba BB, Brouckaert BM, Swartz, CD, Offringa G, Mpenyana-Monyatsi L and Momba MNB (2011) Household water treatment systems: A solution to the production of safe drinking water by the low-income communities of Southern Africa. Physics and Chemistry of the Earth 36 pp1120–1128
70. Offringa G (2012) Concluding Report on Water Quality and Membrane Fouling Problems Experienced at The Biovac Institute. Internal report. The Biovac Institute, Cape Town
71. Offringa G, Victor N, Victor S, September C and Goldie I (2013) Report on Membrane Concentration of Tea Extract. Internal Report. Ikusasa Water and CSIR, Cape Town
72. Momba MNB, Mwabi JK, Brouckaert BM, Swartz C, Offringa G and Rugimbana RO (2013) South African Guidelines for the Selection and Use of Appropriate Home Water Treatment Systems by Rural Households. Research Report No TT 580/13, Water Research Commission, Pretoria
73. Momba MNB, Mwabi JK, Mamba, BB, Brouckaert BM, Swartz C, Offringa G and Rugimbana RO (2013) Selection and Use of Home Water Treatment Systems and Devices. Research Report No 1884/1/13, Water Research Commission, Pretoria
74. Offringa G (2014) Final Report on Copper Tube Pit Corrosion in the Mossel Bay Area. Internal report to the Mossel Bay Municipality.
75. Offringa G (2015) Process design of a DAF system for canola oil effluent treatment. Design and report to Sustainable Engineering, Somerset West
76. Offringa G and Van Schoor P (2016) Pilot plant trials to assess the feasibility of biological iron and manganese removal for the provision of potable water to the Kouga Municipality. Report to Kouga Municipality.
77. Offringa G (2016) Design of a Dissolved Air Flotation/Filtration system for the modification of the Meulwater drinking water treatment works. Report to Aurecon, Cape Town.
78. Offringa G (2016) Recommendations to make the 150 m3/d Rainbow Chicken DAF Plant, Hammersdale, fully operational again. Report to Improchem.
79. Offringa G (2017) Reuse of seepage water for toilets in the building at 9, Dorp Street, Cape Town. Report to B.N. Buziba & Associates, Cape Town.
80. Offringa G (2017) Process design of a 180 m3/h Dissolved Air Flotation system for drinking water treatment. Report to Waterskills SA, Pretoria.
81. Offringa G (2017) Design of a 840 m3/d biotower stripping system for the removal of hydrogen sulphide from ground water. Report to Water & Pump Solutions, Port Elizabeth.
81. Offringa G (2018) Process design of of a 200 Ml/d DAF system as pre-treatment for membrane seawater desalination. Report to Aveng Water, Johannesburg
82. Offringa G (2018) Process design of a 380 m3/d Dissolved Air Flotation system as pretreatment for the membrane treatment and reuse of laundry effluent. Report to Ikusasa Water, Somerset West
83. Offringa G (2024) Report on the assessment and recommendations for the renovation and improvement of the 5 Ml/d Amawandle Pelagic Fisheries Dissolved Air Flotation (DAF) effluent treatment plant. Report to Amawandle Pelagic Fisheries, Laaiplek.
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