High solubility gas flotation in liquid-solid separation

摘要

BOD-containing water is purified by oxygenation. The resulting sludge is subjected to flotation with a gas having a solubility in water higher than that of air.PPThe preferred source of high solubility gas is the vent gas from the oxygenation zone or stack gas obtained by burning methane generated by anaerobically digesting the floated solids.PPRemoval of insoluble contaminants from bacterial or bacterial-algal pond effluent using high solubility gas flotation is also disclosed.