Some aspects of the treatment of fellmongery effluent by manganese catalysed oxidation

By: Russell, J.M. (Meat Industry Research Institute of New Zealand. Hamilton).
Contributor(s): Cooper, R.N. (Meat Industry Research Institute of New Zealand. Hamilton) | Meat Industry Research Institute of New Zealand. Hamilton.
Material type: materialTypeLabelBookPublisher: 1980Description: 12 p.Report number: MIRINZ--756Subject(s): FELLMONGERY | WASTE TREATMENT | OXIDATION | SULPHIDES | CHEMICAL REMOVAL
Incomplete contents:
The efficiency of manganese as a catalyst for the oxidation of sulphide- bearing fellmongery wastes is dependent on its concentration in solution, although levels above 50 mg/l (as manganese) have little additional affect on the reaction rate. Levels of manganese as low as 11 mg/l can be used. Manganese catalyst can be removed from solution by adsorption or reaction with wool and grease and subsequent flotation. The scum so formed shows catalytic activity when it is re-mixed with the bulk solution. Analysis of oxidized solutions for sulphide and thiosulphate suggests that elemental sulphur is an important reaction product, and further confirmatory evidence for this arises from a comparison of oxygen supply data and the decrease in sulphide sulphur concentrations
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The efficiency of manganese as a catalyst for the oxidation of sulphide- bearing fellmongery wastes is dependent on its concentration in solution, although levels above 50 mg/l (as manganese) have little additional affect on the reaction rate. Levels of manganese as low as 11 mg/l can be used. Manganese catalyst can be removed from solution by adsorption or reaction with wool and grease and subsequent flotation. The scum so formed shows catalytic activity when it is re-mixed with the bulk solution. Analysis of oxidized solutions for sulphide and thiosulphate suggests that elemental sulphur is an important reaction product, and further confirmatory evidence for this arises from a comparison of oxygen supply data and the decrease in sulphide sulphur concentrations

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