Production of polyhydroxyalkanoates (PHA) by activated sludge treating municipal wastewater: effect of pH, sludge retention time (SRT), and acetate concentration in influent

Recent trend for membrane bioreactor (MBR) operation was to apply a low sludge retention time (SRT) to decrease the fouling propensity and simplify the overall maintenance. However, the correct control and operation of MBRs under low SRT conditions were not well-established. In this study, modeling of MBR system for municipal wastewater treatment was evaluated using hybrid Activated Sludge Models 3 (ASM3), which helped in determining the control and operating strategies. The experiment-based, manual trial-and-error approach used to calibrate the hybrid ASM3 was verified to be useful for MBR modeling at 30 d sludge retention time (SRT). Furthermore, the consistency relationships among carbon oxygen demanded (COD), soluble microbial products (SMP) and mixed liquor suspended solids (MLSS) were established in the process of modeling, implying that the accurate simulation of MLSS were the prerequisites for the COD and SMP prediction.

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Free Water Content and Sludge Retention Time: Impact on Oxygen Transfer in Activated Sludge

Environmental Science & Technology ◽

10.1021/es901559f ◽

2009 ◽

Vol 43 (22) ◽

pp. 8561-8565 ◽

Cited By ~ 22

Author(s):

Jochen Henkel ◽

Peter Cornel ◽

Martin Wagner

Keyword(s):

Activated Sludge ◽

Water Content ◽

Retention Time ◽

Oxygen Transfer ◽

Free Water ◽

Sludge Retention Time ◽

Free Water Content

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Removal of selected endocrine disrupters in activated sludge systems: Effect of sludge retention time on their sorption and biodegradation

Bioresource Technology ◽

10.1016/j.biortech.2009.10.086 ◽

2010 ◽

Vol 101 (7) ◽

pp. 2090-2095 ◽

Cited By ~ 70

Author(s):

Athanasios S. Stasinakis ◽

Constantinos I. Kordoutis ◽

Vasiliki C. Tsiouma ◽

Georgia Gatidou ◽

Nikolaos S. Thomaidis

Keyword(s):

Activated Sludge ◽

Retention Time ◽

Endocrine Disrupters ◽

Sludge Retention Time ◽

Activated Sludge Systems

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Effect of sludge retention time on inclined plate function, treatment performance and sludge characteristics of inclined plate membrane bioreactors treating municipal wastewater

Water and Environment Journal ◽

10.1111/wej.12128 ◽

2015 ◽

Vol 29 (3) ◽

pp. 346-352 ◽

Cited By ~ 1

Author(s):

Suda Ittisupornrat ◽

Tomohiro Tobino ◽

Kazuo Yamamoto

Keyword(s):

Retention Time ◽

Municipal Wastewater ◽

Membrane Bioreactors ◽

Inclined Plate ◽

Sludge Characteristics ◽

Treatment Performance ◽

Sludge Retention Time

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A Modified Activated Sludge Model No.3 (ASM3) for Membrane Bioreactor (MBR) with an Emphasis for Solids Hydrolysis

E3S Web of Conferences ◽

10.1051/e3sconf/20185304039 ◽

2018 ◽

Vol 53 ◽

pp. 04039

Author(s):

Xinyue Jiang ◽

Bin Xu

Keyword(s):

Carbon Source ◽

Activated Sludge ◽

Retention Time ◽

Membrane Bioreactor ◽

Activated Sludge Model ◽

Modeling Approach ◽

Sludge Retention Time ◽

Subsequent Effect ◽

Hydrolysis Of ◽

Denitrification Process

The previously assumed “inert” organics measured by respirometric method has been reported to be hydrolysable under long sludge retention time (SRT) configuration such as membrane bioreactor(MBR). The sludge production under long SRT has also shown to be lower than the standard activated sludge model (ASM) prediction. The hydrolysis of “inert” organics can provide the extra carbon source for denitrification. The current modeling approach has not yet included this aspect. In this study, a modified ASM3 was developed to account for the hydrolysis of “inert” organics and subsequent effect on the denitrification process under long SRT.

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