Disinfection of potable water - which disinfectant to use?
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Selection of disinfectants for drinking water. Megan Rose, Pr.Sci.Nat. Materials Scientist Neopak Research and Development South Africa
![Disinfection of drinking water: Which
disinfectant to use at a site?
Research project submitted in partial compliance with the requirements for the B. Tech in the Department of Pulp & Paper Technology, Technikon Natal. Supervisor: H.J. Jacobs. 5 October 2001.
[The author was an employee of Sappi SA Technology Centre and a student at the Natal Technikon when this project was undertaken]
Megan Lee Crawcour
Abstract
The reclaimed water from the Ancor Sewage Treatment Works is used at Sappi Enstra as a cheaper source of water compared to potable water. This
reclaimed water varies in quality as documented in the historical data for iron and manganese levels in the Entering Factory Sewage (EFS) water. Removal
methods for the iron and manganese were sought – initially pyrolusite was to be investigated but was unobtainable in South Africa. Attention was then
focused on the removal of the two metals from the reclaimed water after the Dissolved Air Flotation (DAF) unit by the use of a pilot sand filter supplied by
Vivendi. This pilot sand filter operated in the pressurised mode was used to obtain % removal (reduction) data showing that 100% of Manganese and 42 to
91% of Iron was removed. The 100% manganese removal may be due to analytical capabilities. The graphical performance data was of most benefit to the
iron removal as these values were more numerous and scattered. The performance data for manganese was of limited use.
Keywords
Sand filter, iron removal, treated sewage water](https://image.slidesharecdn.com/disinfectionofpotablewater-150917124236-lva1-app6891/85/Disinfection-of-potable-water-which-disinfectant-to-use-1-320.jpg)
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Disinfection of potable water - which disinfectant to use?
- 1. Disinfection of drinking water: Which disinfectant to use at a site? Research project submitted in partial compliance with the requirements for the B. Tech in the Department of Pulp & Paper Technology, Technikon Natal. Supervisor: H.J. Jacobs. 5 October 2001. [The author was an employee of Sappi SA Technology Centre and a student at the Natal Technikon when this project was undertaken] Megan Lee Crawcour Abstract The reclaimed water from the Ancor Sewage Treatment Works is used at Sappi Enstra as a cheaper source of water compared to potable water. This reclaimed water varies in quality as documented in the historical data for iron and manganese levels in the Entering Factory Sewage (EFS) water. Removal methods for the iron and manganese were sought – initially pyrolusite was to be investigated but was unobtainable in South Africa. Attention was then focused on the removal of the two metals from the reclaimed water after the Dissolved Air Flotation (DAF) unit by the use of a pilot sand filter supplied by Vivendi. This pilot sand filter operated in the pressurised mode was used to obtain % removal (reduction) data showing that 100% of Manganese and 42 to 91% of Iron was removed. The 100% manganese removal may be due to analytical capabilities. The graphical performance data was of most benefit to the iron removal as these values were more numerous and scattered. The performance data for manganese was of limited use. Keywords Sand filter, iron removal, treated sewage water