SEWAGE SLUDGE MELTING METHOD

PROBLEM TO BE SOLVED: To provide a sewage sludge melting method which can prevent dust gunk, perform the shortest feedback control, suppress the evaporation of phosphorus, realize a dust collection rate of about 100% to reduce the SS load of returned water. SOLUTION: When sewage sludge is dehydrated...

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Bibliographische Detailangaben
Hauptverfasser:	TAGUCHI YASUZO, TATEISHI SEIJI, KAWASHIMA MASARU, TOKUYASU MASAYA, HACHIMAN TAKETO, KAMIIDE KENICHI, GOTO KAZUAKI, NOMURA HISAFUMI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY METALLURGY TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a sewage sludge melting method which can prevent dust gunk, perform the shortest feedback control, suppress the evaporation of phosphorus, realize a dust collection rate of about 100% to reduce the SS load of returned water. SOLUTION: When sewage sludge is dehydrated and dried to be subjected to melting treatment in a melting furnace 39, the proper value of an Fe/P ratio is decided beforehand from an empirical rule in a correlation between the Fe/P ratio and VTS (a ratio of reduction in weight by strong heating) in the sewage sludge, and the sewage sludge to be melted is analyzed to find the Fe/P ratio and VTS. Iron powder is added to the sewage sludge before being fed to the melting furnace 39 so that the analytical value of the Fe/P is larger than the proper value of the empirical rule. COPYRIGHT: (C)2006,JPO&NCIPI