Internal precipitation of phosphate from activated sludge
Abstract
Abstract THERE IS DISCLOSED AN ACTIVATED SLUDGE SEWAGE TREATMENT PROCESS IN WHICH INFLUENT SEWAGE MATERIAL IS MIXED WITH ACTIVATED SLUDGE CONTAINING PRECIPITATED PHOSPHATE PARTICLES TO PROVIDE A MIXED LIQUOR. THE MIXED LIQUOR IS AERATED TO CAUSE THE MICRO-ORGANISMS PRESENT IN THE SLUDGE TO TAKE UP PHOSPHATE. PHOSPHATE-ENRICH SLUDGE IS SEPARATED FROM THE MIXED LIQUOR TO PROVIDE A SUBSTANTIALLY PHOSPHATE-FREE EFFUENT. THE PHOSPHATE-ENRICHED SLUDGE IS TREATED TO CAUSE THE MICRO-ORGANISMS IN THE SLUDGE TO RELEASE PHOSPHATE TO THE LIQUID PHASE AND A PHOSPHTE PRECIPITANT IS ADDED TO PRECIPITATE THE WATER SOLUBLE PHOSPHATE CONTENT. THE SLUDGE CONTAINING THE PRECIPITATED PHOSPHATE PARTICLES IS RECYCLED FOR MIXING WITH INFLUENT SEWAGE MATERIAL.
Inventors
- 👤 George J Topol
Bibliographic Details
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