Rate determination and distribution of anammox activity in activated sludge treating swine wastewater

Bioresource Technology
Miyoko WakiYuichi Suwa

Abstract

This paper presents a quantitative investigation and analysis of anammox activity in sludge taken from biological swine wastewater treatment plants. An incubation experiment using a (15)N tracer technique showed anammox activity in sludge taken from 6 out of 13 plants with the rate ranging from 0.0036 micromol-N(2)/g-VSS/h to 3.1 micromol-N(2)/g-VSS/h, and in a biofilm with the highest activity at 25.8 micromol-N(2)/g-VSS/h. It is notable that 9 out of 11 sludges in which the pH was maintained between 6.6 and 8.1 retained anammox activity, while those with either a lower or higher pH did not. Moreover, anammox-positive sludge had a significantly higher concentration of NO(2)(-)-N plus NO(3)(-)-N than did anammox-negative sludge. A significant difference was not observed between anammox-positive and -negative sludge regarding BOD/NH(4)(+)-N in the influent, DO concentration in aeration tanks, and the concentrations of NH(4)(+)-N, free nitric acid, and free ammonia.

Citations

Jun 18, 2010·Analytical and Bioanalytical Chemistry·Ingela Lanekoff, Roger Karlsson
Jan 30, 2013·Applied Microbiology and Biotechnology·Shuang DingGhulam Abbas
Apr 30, 2013·Applied and Environmental Microbiology·M OshikiS Okabe
Oct 26, 2010·Journal of Microbiological Methods·Kazuo IsobeYuichi Suwa
Oct 12, 2016·Chemosphere·Ryu SutoMiyoko Waki
Dec 18, 2016·Journal of Bioscience and Bioengineering·Giri ParkKenji Furukawa

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