A comparative study on the toxicity of nano zero valent iron (nZVI) on aerobic granular sludge and flocculent activated sludge: Reactor performance, microbial behavior, and mechanism of toxicity

2019 ◽  
Vol 129 ◽  
pp. 238-248 ◽  
Author(s):  
Hasti Daraei ◽  
Mohammad Rafiee ◽  
Ahmad Reza Yazdanbakhsh ◽  
Mohammad Ali Amoozegar ◽  
Qiu Guanglei
Keyword(s):  
Comparative Study ◽  
Activated Sludge ◽  
Granular Sludge ◽  
Zero Valent Iron ◽  
Aerobic Granular Sludge ◽  
Reactor Performance ◽  
Mechanism Of Toxicity ◽  
Activated Sludge Reactor ◽  
Nano Zero Valent Iron

Textile wastewater treatment: Aerobic granular sludge vs activated sludge systems

2014 ◽  
Vol 54 ◽  
pp. 337-346 ◽  
Author(s):  
Adriana Maria Lotito ◽  
Marco De Sanctis ◽  
Claudio Di Iaconi ◽  
Giovanni Bergna
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Granular Sludge ◽  
Textile Wastewater ◽  
Aerobic Granular Sludge ◽  
Textile Wastewater Treatment ◽  
Activated Sludge Systems

The SBR and its biofilm application potentials

2004 ◽  
Vol 50 (10) ◽  
pp. 1-10 ◽  
Author(s):  
P.A. Wilderer ◽  
B.S. McSwain
Keyword(s):  
Activated Sludge ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Waste Streams ◽  
Sludge Flocs ◽  
Biofilm Reactors ◽  
Volatile Organic ◽  
High Level ◽  
Slow Growing

Twenty plus years of experience, innovation, and research in the field of biological wastewater treatment and biofilm applications lead to the conclusion that biofilms are in many cases more desirable in reactors than suspended activated sludge. Biofilm reactors can provide very long biomass residence times even when the hydraulic influent loading is low. This makes them particularly suitable when treatment requires slow growing organisms with poor biomass yield or when the wastewater concentration is too low to support growth of activated sludge flocs. Regardless of the settling characteristics of biological aggregates or the hydraulic influent loading the metabolic activity in the reactor can be maintained at a high level. This paper reviews the application of biofilms in sequencing batch reactor (SBR) systems to treat non-readily biodegradable substrates, volatile organic waste constituents, complex waste streams requiring co-metabolism, and particulate wastewaters. Recent research using the SBR to form aerobic granular sludge as a special application of biofilms is also discussed.

Sequencing batch reactor (SBR) as optimal method for production of granular activated sludge (GAS) – fluid dynamic investigations

2007 ◽  
Vol 55 (8-9) ◽  
pp. 151-158 ◽  
Author(s):  
B.E. Zima ◽  
L. Díez ◽  
W. Kowalczyk ◽  
A. Delgado
Keyword(s):  
Multiphase Flow ◽  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Fluid Dynamic ◽  
Batch Reactor ◽  
Aerobic Condition ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Major Influence ◽  
Optimal Method

Fluid dynamic investigations of multiphase flow (fluid, air, granules) in a sequencing batch reactor (SBR) are presented. SBR can be considered as an attractive technology for cultivation of granular activated sludge (GAS). Granulation is a complicated process and its mechanism is not fully understood yet. Many factors influence the formation and structure of aerobic granular sludge in a bioreactor. Extracellular polymer substances (EPS) and superficial gas velocity (SGV) play a crucial role for granules formation. Additionally, it is supposed that EPS production is stimulated by mechanical forces. It is also assumed that hydrodynamic effects have a major influence on the formation, shape and size of GAS in SBR under aerobic condition. However, the influence of stress on granulation is poorly investigated. Thus, in the present paper, fluid dynamic investigations of multiphase flow in a SBR, particularly effect of normal and shear strain, are reported. In order to analyse multiphase flow in the SBR, optical in-situ techniques with particle image velocimetry (PIV) and particle tracking velocimetry (PTV) are implemented. Obtained results show a characteristic flow pattern in a SBR. It is pointed out that additional effects like particle-wall collisions, inter particle collisions, erosion can also affect significantly granules formation.

A comparative study of phosphorus removal using biopolymer from aerobic granular sludge: A factorial experimental evaluation

2020 ◽  
Vol 8 (2) ◽  
pp. 103541
Author(s):  
Patricia Dall’ Agnol ◽  
Nelson Libardi ◽  
José Miguel Muller ◽  
Jéssica Antunes Xavier ◽  
Dayane Gonzaga Domingos ◽  
...  
Keyword(s):  
Comparative Study ◽  
Experimental Evaluation ◽  
Phosphorus Removal ◽  
Granular Sludge ◽  
Aerobic Granular Sludge

Aerobic Granular Sludge Bioaugmentation in Low-SRT Flocculent Activated Sludge: Bench-Scale Demonstration and Pilot Testing

2018 ◽  
Vol 2018 (10) ◽  
pp. 3787-3796
Author(s):  
Bryce A Figdore ◽  
H. David Stensel ◽  
Mari K.H Winkler ◽  
Maxwell Armenta ◽  
Bob Bucher ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Pilot Testing ◽  
Bench Scale
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