Development of High Performance Disposal System of Waste Sludge using Subcritical Water

Masahiro Yasuda; Hiroyuki Yoshida; Takahiro Umezawa; Takayuki Matsubara; Minoru Seki

doi:10.11491/apcche.2004.0.845.0

Asian Pacific Confederation of Chemical Engineers congress program and abstracts

Session ID : 3P-06-039

DOI https://doi.org/10.11491/apcche.2004.0.845.0

Conference information

Host: The Society of Chemical Engineers, Japan

Development of High Performance Disposal System of Waste Sludge using Subcritical Water

Masahiro Yasuda, Hiroyuki Yoshida, Takahiro Umezawa, Takayuki Matsubara, Minoru Seki

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Keywords: waste sludge, subcritical hydrolysis reaction, organic acid, fatty acid, amino acid

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

To develop high performance disposal system of waste sludge using subcritical water, the batch subcritical hydrolysis reactions of raw waste sludge and concentrated waste sludge were studied. For 10 min subcritical hydrolysis reaction (513K), the majority of waste sludge were completely hydrolyzed and oil, fat, residual solid, and aqueous solution produced. Oil mainly consisting of oleic acid and palmitoleic acid and the aqueous solution consisting various kind of organic acids and amino acids were obtained. From the analysis of CHNS measurement, fat and residual solid would consist of saturated hydrocarbon.

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