Journal
WATER SCIENCE AND TECHNOLOGY
Volume 42, Issue 9, Pages 89-96Publisher
I W A PUBLISHING
DOI: 10.2166/wst.2000.0178
Keywords
agriculture; biogas; digestion; disintegration; sewage sludge; thermal hydrolysis
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The first full-scale plant for sludge disintegration through Cambi thermal hydrolysis was started up in Hamar, Norway at the end of 1995. It is the first plant with a new design where sludge is directly heated by live steam. During the last three years the plant worked with an availability of over 99%. Prior to hydrolysis the sludge is dewatered and the digester is fed with 10-12% DS, saving more than 50% of digester volume compared with a conventional process. The degree of stabilization is around 60% measured as rate COD-conversion into biogas. The stabilised sludge, which is guaranteed free of pathogens, is an attractive product to agriculture and has a high fertilizing effect.
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