1. Express-Method for Determination of the Oxidizing Capacity of Activated Sludge and Its Biofilms in Pulp and Paper Mill
- Author
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D. G. Chukhchin, Vera Rudakova, Konstantin Y. Terentyev, Ksenia Vashukova, and Evgeniy A. Varakin
- Subjects
dehydrogenase activity ,Geography, Planning and Development ,Dehydrogenase ,oxidizing capacity ,010501 environmental sciences ,Aquatic Science ,engineering.material ,01 natural sciences ,Biochemistry ,biofilm ,03 medical and health sciences ,Oxidizing agent ,Bioreactor ,activated sludge ,TD201-500 ,030304 developmental biology ,0105 earth and related environmental sciences ,Water Science and Technology ,0303 health sciences ,Water supply for domestic and industrial purposes ,Chemistry ,business.industry ,Pulp (paper) ,Biofilm ,Paper mill ,Hydraulic engineering ,Pulp and paper industry ,Activated sludge ,engineering ,biological wastewater treatment ,Sewage treatment ,TC1-978 ,business - Abstract
Microbial dehydrogenase activity can help to determine the oxidizing capacity of activated sludge. Here we propose an innovative and automated express-method based on rapid determination of dehydrogenase activity. The measurement is based on the rate of methylene blue reduction by living microbial cells in suspension. A single analysis takes 10 min. The method was adapted for biofilms immobilized on the floating carriers of industrial bioreactors and the kinetics of biological oxidation by activated sludge and biofilms was compared. New parameters were proposed to characterize the biological oxidation under low oxygen levels. The obtained make it possible to quickly determine the dehydrogenase activity of activated sludge and biofilms and promptly monitor the effectiveness of industrial biological wastewater treatment.
- Published
- 2021
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