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Wet Oxidation of Process Waters from the Hydrothermal Carbonization of Sewage Sludge
Author(s) -
Weiner Barbara,
Breulmann Marc,
Wedwitschka Harald,
Fühner Christoph,
Kopinke FrankDieter
Publication year - 2018
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201700050
Subject(s) - hydrothermal carbonization , sewage sludge , wet oxidation , chemical oxygen demand , carbonization , chemistry , anaerobic digestion , wastewater , sewage treatment , pulp and paper industry , environmental chemistry , waste management , environmental science , environmental engineering , adsorption , methane , organic chemistry , engineering
Combing hydrothermal carbonization (HTC) of sewage sludge with wet oxidation of the resulting process waters (PWs) is a favorable economic process leading to a wastewater that is better amenable to biological treatments. Five PWs from HTC of sewage sludge and straw were oxidized with molecular oxygen. A good removal of chemical oxygen demand and dissolved organic carbon was shown. The oxidized waters proved good substrates for a subsequent anaerobic digestion. However, the oxidized PWs were identified as more toxic in germination tests with cress ( Lepidium sativum L.) compared to the untreated PWs.