1994
DOI: 10.2166/wst.1994.0408
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Operation results of the sewage sludge melting system and estimation of scale-up method for the reflector type melting furnace

Abstract: Sludge melting systems have been recently applied to the treatment of a great deal of sludge generated from sewage treatment plants, and the plant scale has become bigger and bigger in accordance with the social requirements. This paper reports operating data of one of the biggest scale melting plants for sewage sludge equipped with two reflector type melting furnace trains and includes running cost data as well as estimates for scaling up the process.

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“…Thus, it is expected that even for the ash melting system, elution of hexavalent Cr from molten sewage sludge slag would be controlled somewhat by regulating temperature, sample basicity, and cooling rate. There have been various studies on sewage sludge melting systems. However, elution of Cr from molten sewage sludge slag has not been reported despite its great practical importance. In a previous study, we investigated the elution of hexavalent Cr from molten sewage sludge slag produced by the ash melting system combined with suppressive combustion.…”
Section: Introductionmentioning
confidence: 99%
“…Thus, it is expected that even for the ash melting system, elution of hexavalent Cr from molten sewage sludge slag would be controlled somewhat by regulating temperature, sample basicity, and cooling rate. There have been various studies on sewage sludge melting systems. However, elution of Cr from molten sewage sludge slag has not been reported despite its great practical importance. In a previous study, we investigated the elution of hexavalent Cr from molten sewage sludge slag produced by the ash melting system combined with suppressive combustion.…”
Section: Introductionmentioning
confidence: 99%