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Resource recovery from excess sludge by subcritical water combined with magnesium ammonium phosphate process.
Water Sci Technol ; 54(9): 81-6, 2006.
Article in En | MEDLINE | ID: mdl-17163045
The amount of excess sludge produced in municipal wastewater treatment plants in Japan is increasing every year as the urban population increases. Phosphorus in excess sludge could be a potential phosphorus resource since at present, phosphate rock is being exhausted all over the world. Every year, Japan imports large quantities of phosphorus from abroad but much is discharged as excess sludge. Therefore, the solubilization process, one method of recovering phosphorus from sludge, could be a promising solution. In this study, a subcritical water process, a new technology that solubilizes sludge under subcritical conditions, was applied before the phosphorus in sludge was recovered with the magnesium ammonium phosphate (MAP) process. As a result, the solubilization rate of excess sludge achieved approximately 80% and about 94-97% of the phosphorus could be recovered.
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Collection: 01-internacional Database: MEDLINE Main subject: Phosphates / Phosphorus / Sewage / Waste Disposal, Fluid / Magnesium Compounds / Water Purification Country/Region as subject: Asia Language: En Journal: Water Sci Technol Journal subject: SAUDE AMBIENTAL / TOXICOLOGIA Year: 2006 Document type: Article Country of publication: United kingdom
Search on Google
Collection: 01-internacional Database: MEDLINE Main subject: Phosphates / Phosphorus / Sewage / Waste Disposal, Fluid / Magnesium Compounds / Water Purification Country/Region as subject: Asia Language: En Journal: Water Sci Technol Journal subject: SAUDE AMBIENTAL / TOXICOLOGIA Year: 2006 Document type: Article Country of publication: United kingdom