Investigation into Sappi Enstra sewage water quality
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Treated water from Ancor sewage works is used at Sappi Enstra. Corruseal. Megan Rose, Pr.Sci.Nat. Materials Scientist Neopak Research and Development South Africa
![Investigation into Enstra Sewage
Water Quality
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/investigationintoenstrasewagewaterquality-150917124427-lva1-app6891/85/Investigation-into-Sappi-Enstra-sewage-water-quality-1-320.jpg)
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Investigation into Sappi Enstra sewage water quality
- 1. Investigation into Enstra Sewage Water Quality 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