Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorus removal

Water Research
C LopezE Morgenroth

Abstract

In many biological wastewater treatment systems, bacterial growth and the amount of active biomass are limited by the availability of substrate. Under these low growth conditions, endogenous processes have a significant influence on the amount of active biomass and therefore, the overall system performance. In enhanced biological phosphorus removal (EBPR) systems endogenous processes can also influence the levels of the internal storage compounds of the polyphosphate accumulating organisms (PAO), directly affecting phosphorus removal performance. The purpose of this study was to evaluate the significance of different endogenous processes that occur during the long-term starvation of EBPR sludge under aerobic and anaerobic conditions. Activated sludge obtained from a laboratory sequencing batch reactor was used to perform a series of batch starvation experiments. Under aerobic starvation conditions we observed a significant decay of PAO (first-order decay rate of 0.15/d) together with a rapid utilization of polyhydroxyalkanoates (PHA) and a slower utilization of glycogen and polyphosphate to generate maintenance energy. On the other hand, anaerobic starvation was best described by maintenance processes that rapidly reduce the le...Continue Reading

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Citations

Jul 11, 2013·Environmental Technology·José Tavares de SousaMarielle Ferreira de Oliveira
Mar 29, 2011·Bioresource Technology·Yayi WangShaowei Chen
May 30, 2009·Bioresource Technology·Peide SunZhiguo Fang
Aug 21, 2007·Water Research·Christian AbegglenHansruedi Siegrist
May 9, 2012·Biotechnology and Bioengineering·Dongbo WangGuangming Zeng
Aug 14, 2012·Biotechnology and Bioengineering·Carlota TayàJuan A Baeza
Feb 23, 2011·Microbial Biotechnology·Shaomei He, Katherine D McMahon
Sep 23, 2011·Water Research·Matt WinklerCynthia K Brinkman
Sep 16, 2014·Water Research·Ana B LanhamMaria A M Reis
Dec 20, 2014·Applied Microbiology and Biotechnology·L WellesD Brdjanovic
Mar 10, 2017·Environmental Technology·Tawfik El MoussaouiNaaila Ouazzani
Oct 31, 2006·Journal of Theoretical Biology·Caroline TollaJean-Christophe Poggiale
Jan 12, 2007·Biotechnology and Bioengineering·Andrew J Schuler, David Jassby
Sep 18, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Bing LiuHidenari Yasui
Sep 13, 2011·Water Environment Research : a Research Publication of the Water Environment Federation·Mbarka GouiderSami Sayadi
Oct 29, 2009·Water Environment Research : a Research Publication of the Water Environment Federation·Jean-Marc ChoubertAlain Héduit
Jan 18, 2008·Water Environment Research : a Research Publication of the Water Environment Federation·Carlos M López-VázquezMark C M van Loosdrecht

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