ResearchSpace
→
Browsing by Author

Browsing by Author "Greben, HA"

Now showing items 1-13 of 13

Bio-remediation of mine water

Author: Greben, HA Date: Feb 2009 This presentation looks at the mining history in South Africa, the impact of mining on the environment, especially water pollution. Then the CSIR's project on remediation of mine water is discussed Read more
Biological mine water treatment operating a one stage reactor system

Author: Baloyi, MJ ; Greben, HA Date: May 2006 Mine drainage arises from oxidation of pyrites, due to exposure to air and water. Acid mine drainage normally contains high concentrations of sulphate, metals and acidity. These pollutants can be reduced by applying the biological sulphate ... Read more
Biological nitrate removal from synthetic wastewater using a fungal consortium in one stage bioreactors

Author: Greben, HA ; Joubert, LM ; Tjatji, MP ; Whites, HE ; Botha, A Date: Apr 2007 A series of lignocellulosic fungi, capable of cellulase and/or xylanase production, were isolated from soil to be used for cellulose degradation and nitrate removal from nitrate-rich wastewater in simple one-stage anaerobic bioreactors ... Read more
Biological sulphate removal from acid mine effluent using ethanol as carbon and energy source

Author: Greben, HA ; Maree, JP ; Singmin, Y ; Mnqanqeni, S Date: 2000 Mining effluents are major contributors to mineralization of receiving waters and can be toxic to man, animals and plants due to unacceptably high concentrations of heavy metals. A biological sulphate removal process has been developed for ... Read more
Comparison between sucrose, ethanol and methanol as carbon and energy sources for biological sulphate reduction

Author: Greben, HA ; Maree, JP ; Mnqanqeni, S Date: 2000 Sulphate was reduced via sulphide to sulphur when operating a single-stage completely mixed reactor configuration feeding synthetic feed. The aim of this study was to determine the volumetric and specific sulphate reduction rates using sugar, ... Read more
A comparison of the cost associated with pollution prevention measures to that required to treat polluted water resources

Author: Oelofse, Suzanna HH ; Roux, S ; De Lange, Willem J ; Mahumani, B ; Le Roux, Wouter J ; Du Preez, M ; Greben, HA ; Steyn, Maronel Date: Mar 2012 Pollution of water resources is largely as a result of human activity and therefore could be prevented to a large degree. The quality of our water resources is deteriorating and downstream water users have to deal with the pollution impacts ... Read more
Effect of adapting cellulose degrading microorganisms to 25°C providing energy sources for biological sulphate removal

Author: Greben, HA ; Sigama, NJ Date: Nov 2008 Vast volumes of acid mine drainage (AMD) is still being generated in South Africa, due to decant from both active and closed mines. Research to find a cost effective, environmentally friendly treatment system to reduce the salinity and to ... Read more
From organic waste to energy: A feasible option in South Africa?

Author: Greben, HA ; Nemaangani, LP ; Oelofse, Suzanna HH Date: Nov 2008 Waste in South Africa is disposed of in landfills, which produces unwanted landfill gas (CH4) and leachate emissions. Biological treatment of the Organic Fraction of Municipal Solid Waste (OFMSW) is an established technology in Europe, applying ... Read more
Grass-cellulose as energy source for biological sulphate removal from acid mine effluents

Author: Greben, HA ; Sigama, NJ Date: Nov 2008 The biological sulphate removal technology requires carbon and energy sources to reduce sulphate to sulphide. Plant biomass, e.g. grass, is a sustainable source of energy when cellulose is utilised during anaerobic degradation, producing ... Read more
Improved sulphate removal rates at increased sulphide concentration in the sulphidogenic bioreactor

Author: Greben, HA ; Maree, JP ; Eloff, E ; Murray, K Date: Jul 2005 The product of the biological sulphate reduction is sulphide. High concentrations of molecular H2S(g) can be inhibitory for microbial activity, especially at a reactor pH of 6 to 7. This paper focuses on the effect of high sulphide concentrations ... Read more
Treatment of acid and sulphate-rich effluents in an integrated biological/chemical process

Author: Maree, JP ; Greben, HA ; De Beer, Morris Date: Apr 2004 A novel chemical/biological process is described in which sulphate and sulphide are removed simultaneously during biological treatment. Partial sulphate removal is achieved during chemical pre-treatment. In the biological stage sulphate is ... Read more
Unlocking the resource potential of organic waste: a South African perspective

Author: Greben, HA ; Oelofse, Suzanna HH Date: Oct 2009 In many countries, especially on the Asian continent, waste is considered a valuable renewable energy resource. At present 40% of waste generated in South Africa comprises organic material which, when digested supplies biogas. The biogas ... Read more
Volatile fatty acid formation and utilization in anaerobic sulphidogenic batch reactors

Author: Greben, HA ; Baloyi, LJ ; Eisberg, R ; Joubert, LM ; Botha, A ; Venter, SN Date: May 2006 Acid Mine Drainage (AMD) needs to be treated, before it is recharged in rivers and dams. The biological treatment of AMD can be applied using degradation products of cellulose, for example Volatile Fatty Acids as carbon sources. The aim of ... Read more

Now showing items 1-13 of 13

Browse

All of ResearchSpace

Quick Links

Legislation and compliance

General Enquiries

Tel: + 27 12 841 2911
Email: callcentre@csir.co.za

Physical Address
Meiring Naudé Road
Brummeria
Pretoria
South Africa

Postal Address
PO Box 395
Pretoria 0001
South Africa

Social Connect

Resources on this site are free to download and reuse according to associated licensing provision. Please read the terms and conditions of usage of each resource.

Browsing by Author "Greben, HA"

Browsing by Author "Greben, HA"

Browse

All of ResearchSpace

Quick Links

Legislation and compliance

General Enquiries

Social Connect