Optimisation of the Norske Skog activated Sludge Wastewater Treatment Plant at Boyer: The role of trace metals and vitamins
TL;DRAbstract
In January 2008 Norske Skog, Boyer (NSB) , Tasmania, commissioned an activated sludge (AS) wastewater treatment plant to lower the chemical oxygen demand (COD) and suspended solids (SS) in the treated effluent discharged from the mill. In October 2009 the company also changed the feed stock of the mill from a mixed Pinus radiata and Eucalypt to solely P. radiata, altering the pulping process. The cold caustic soda (CCS) plant was decommissioned and replaced with an additional thermo-mechanical pulping (TMP) plant. Trace metals in the mill wastewater samples were analysed before and after this transition to detect any differences due to the changed feedstock and operating conditions, and to determine if metal levels were sufficient for optimum operation of the AS wastewater treatment plant. These analyses indicated deficiencies of cobalt, copper, iron and molybdenum required for optimal theoretical biological growth. In this thesis the effects of micro-nutrient additions on a number of
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In January 2008 Norske Skog, Boyer (NSB) , Tasmania, commissioned an activated sludge (AS) wastewater treatment plant to lower the chemical oxygen demand (COD) and suspended solids (SS) in the treated effluent discharged from the mill. In October 2009 the company also changed the feed stock of the mill from a mixed Pinus radiata and Eucalypt to solely P. radiata, altering the pulping process. The cold caustic soda (CCS) plant was decommissioned and replaced with an additional thermo-mechanical pulping (TMP) plant. Trace metals in the mill wastewater samples were analysed before and after this transition to detect any differences due to the changed feedstock and operating conditions, and to determine if metal levels were sufficient for optimum operation of the AS wastewater treatment plant. These analyses indicated deficiencies of cobalt, copper, iron and molybdenum required for optimal theoretical biological growth. In this thesis the effects of micro-nutrient additions on a number of
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