Excess cell mass as an internal carbon source for biological denitrification

Bioresource Technology
Prashant M BiradarA B Pandit

Abstract

Aim of the present work was to examine whether the SCOD (soluble chemical oxygen demand) released after the physical disruption of excess activated sludge can be used as an alternative carbon source for biological denitrification. In the first stage of research, we investigated the potential use of energy efficient hydrodynamic cavitation (HC) technique for the disruption of activated sludge. In a comparative study between ultrasonic cavitation (UC) and HC, it was observed that UC needs five times more energy than that of HC to release the same amount of SCOD. In the second stage of the experimental study, SCOD was successfully used as an alternative carbon source (alternative to sodium acetate) for biological denitrification. The critical weight ratio (SCOD/NO(3)-N) of seven ensured 100% removal of nitrate. Nitrate removal kinetics indicated that denitrification with SCOD as a carbon source gives higher specific denitrification rate (by approximately 200%) as compared to conventional carbon source (sodium acetate).

References

May 1, 1977·Biotechnology and Bioengineering·M S Doulah
Jan 4, 2005·Bioresource Technology·Lucija FoglarMarija Vuković
Mar 15, 2006·Bioresource Technology·Pradip B DhamoleS S Lele
Apr 7, 2007·Journal of Hazardous Materials·Guangming ZhangYanming Chen
Aug 11, 2007·Water Research·Kuan-Yeow ShowDuu-Jong Lee
Jul 5, 2008·Bioresource Technology·Pantelis KampasAna Soares

❮ Previous
Next ❯

Citations

Apr 21, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·M Zubrowska-Sudol
Feb 28, 2018·Environmental Science and Pollution Research International·Liang GuoZonglian She
May 15, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·J Walczak, M Zubrowska-Sudol
Jul 17, 2021·Journal of Environmental Management·Prangya Ranjan RoutRao Y Surampalli
Feb 18, 2020·Ultrasonics Sonochemistry·Agnieszka Garlicka, Monika Zubrowska-Sudol

❮ Previous
Next ❯

Related Concepts

Related Feeds

Bioinformatics in Biomedicine

Bioinformatics in biomedicine incorporates computer science, biology, chemistry, medicine, mathematics and statistics. Discover the latest research on bioinformatics in biomedicine here.

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.