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Sequencing batch reactor technology for the purification of concentrated dyehouse liquors
Author(s) -
Hemmi Martin,
Krull Rainer,
Hempel Dietmar C.
Publication year - 1999
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450770523
Subject(s) - sequencing batch reactor , anoxic waters , chemistry , pulp and paper industry , biodegradation , wastewater , mineralization (soil science) , degradation (telecommunications) , batch reactor , chromatography , batch processing , waste management , organic chemistry , environmental chemistry , catalysis , nitrogen , computer science , engineering , telecommunications , programming language
A sequencing batch reactor (SBR) technology for the purification of concentrated reactive azo‐dye containing residual dyehouse liquors from a padding process was developed and investigated. Within the treatment cycle, the anoxic dye cleavage, the aerobic mineralization of organic compounds, in combination with the biodegradability‐achieving partial oxidation with ozone, are carried out sequentially. Anoxic decolourization of the residual liquor without addition of an auxiliary substrate was observed, and a 90% biological degradation of the dyehouse liquor's recalcitrant organic compounds was achieved. COD decreased by 95% and AOX (adsorbable organohalogenic compounds) by 90%. Within the whole process, the colour of the concentrated wastewater decreased by 98%.