Effect of particulate organic substrate on aerobic granulation and operating conditions of sequencing batch reactors

Wagner, Jamile; Weissbrodt, David G.; Manguin, Vincent; Costa, Rejane Helena Ribeiro da; Morgenroth, Eberhard; Derlon, Nicolas

doi:10.1016/j.watres.2015.08.030

Cited by 98 publications

(54 citation statements)

References 35 publications

(58 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other authors indicated that to achieve granulation on actual industrial wastewater a longer time is required(Wagner et al, 2015).The granules formation in the present study may have been enhanced by the biofilm detachment present in the effluent of the anaerobic pre-treatment system(Yu et al, 2013). The inactive cells and particulate material in suspension could have acted as aggregation nuclei for granular structure development.Aerobic granules were characterized by a yellow-brownish appearance with a regular and smooth surface.…”

mentioning

confidence: 62%

“…The rate of SCOD converted into intracellular polymers was not evaluated in this study. Afterwards, another increasing trend was observed (from the 75 th min to 4h) which represents the hydrolysis and uptake of PCOD into TB-EPS storage for further metabolic degradation (Wagner et al, 2015). After 4h, the TB-EPS content started decreasing because bacteria in the absence of external carbon source consumed EPS to produce energy for their metabolism.…”

Section: Eps Variation During the Cyclementioning

confidence: 99%

See 1 more Smart Citation

Effect of extended famine conditions on aerobic granular sludge stability in the treatment of brewery wastewater

Corsino

Biase

Devlin

et al. 2017

Bioresource Technology

View full text Add to dashboard Cite

Results obtained from three aerobic granular sludge reactors treating brewery wastewater are presented. Reactors were operated for 60d days in each of the two periods under different cycle duration: (Period I) short 6h cycle, and (Period II) long 12h cycle. Organic loading rates (OLR) varying from 0.7kgCODmd to 4.1kgCODmd were tested. During Period I, granules successfully developed in all reactors, however, results revealed that the feast and famine periods were not balanced and the granular structure deteriorated and became irregular. During Period II at decreased 12h cycle time, granules were observed to develop again with superior structural stability compared to the short 6h cycle time, suggesting that a longer starvation phase enhanced production of proteinaceous EPS. Overall, the extended famine conditions encouraged granule stability, likely because long starvation period favours bacteria capable of storage of energy compounds.

show abstract

mentioning

confidence: 62%

Section: Eps Variation During the Cyclementioning

confidence: 99%

Effect of extended famine conditions on aerobic granular sludge stability in the treatment of brewery wastewater

Corsino

Biase

Devlin

et al. 2017

Bioresource Technology

View full text Add to dashboard Cite

show abstract

“…Ultimately, it resulted in reduced COD and nutrient removal efficiency due to limited storage of organic material in the inner part of the granule. Wagner et al ( 2015 ) compared AGS reactors operated with only soluble carbon (acetate and hydrolyzed peptone) and with soluble and particulate carbon (particulate starch). In the presence of particles, the anaerobic phase had to be prolonged to allow for substrate hydrolysis.…”

Section: Process Configurations and Operational Conditions Affectingmentioning

confidence: 99%

The mechanisms of granulation of activated sludge in wastewater treatment, its optimization, and impact on effluent quality

Wilén

Liébana

Persson

et al. 2018

Appl Microbiol Biotechnol

145

View full text Add to dashboard Cite

Granular activated sludge has gained increasing interest due to its potential in treating wastewater in a compact and efficient way. It is well-established that activated sludge can form granules under certain environmental conditions such as batch-wise operation with feast-famine feeding, high hydrodynamic shear forces, and short settling time which select for dense microbial aggregates. Aerobic granules with stable structure and functionality have been obtained with a range of different wastewaters seeded with different sources of sludge at different operational conditions, but the microbial communities developed differed substantially. In spite of this, granule instability occurs. In this review, the available literature on the mechanisms involved in granulation and how it affects the effluent quality is assessed with special attention given to the microbial interactions involved. To be able to optimize the process further, more knowledge is needed regarding the influence of microbial communities and their metabolism on granule stability and functionality. Studies performed at conditions similar to full-scale such as fluctuation in organic loading rate, hydrodynamic conditions, temperature, incoming particles, and feed water microorganisms need further investigations.

show abstract

“…It is generally assumed that since the rate of anaerobic hydrolysis is relatively low; thus, to benefit from hydrolysis of pCOD the anaerobic condition should be extended (Grady et al, ). However, Wagner et al () reported that in an anaerobic/aerobic granular activated sludge‐SBR system with rbCOD deficiency, extending anaerobic HRT from 1 to 1.5 h did not improve phosphorous removal performance. With regard to activated sludge modeling (Henze et al, ) in ASM1, the rate of anaerobic hydrolysis is zero.…”

Section: Introductionmentioning

confidence: 99%

Potential of hydrolysis of particulate COD in extended anaerobic conditions to enhance biological phosphorous removal

Jabari

Yuan

Oleszkiewicz

2016

Biotech & Bioengineering

View full text Add to dashboard Cite

The effect of anaerobic hydrolysis of particulate COD (pCOD) on biological phosphorous removal in extended anaerobic condition was investigated through (i) sequencing batch reactors (SBR)s with anaerobic hydraulic retention time (HRT) of 0.8, 2, and 4 h; (ii) batch tests using biomass from a full scale biological nutrient removal (BNR) plant; and (iii) activated sludge modeling (BioWin 4.1 simulation). The results from long-term SBRs operation showed that phosphorus removal was correlated to the ratio of filtered COD (FCOD) to total phosphorus (TP) in the influent. Under conditions with low FCOD/TP ratio (average of 20) in the influent, extending anaerobic HRT to 4 h in the presence of pCOD did not significantly improve overall phosphorous removal. During the period with high FCOD/TP ratio (average of 37) in the influent, all SBRs removed phosphorous completely, and the long anaerobic HRT did not have negative effect on overall phosphorous removal. The batch tests also showed that pCOD at different concentration during 4 h test did not affect the rate of anaerobic phosphorus release. The rate of anaerobic hydrolysis of pCOD was significantly low and extending the anaerobic HRT was ineffective. The simulation (BioWin 4.1) of SBRs with low influent FCOD/TP ratio showed that the default kinetics of anaerobic hydrolysis in ASM2d overestimated phosphorous removal in the SBRs (high anaerobic hydrolysis of pCOD). The default anaerobic hydrolysis rate in BioWin 4.1 (ten times lower) could produce similar phosphorous removal to that in the experiment. Results showed that the current kinetics of anaerobic hydrolysis in ASM2d could lead to considerable error in predicting phosphorus removal in processes with extended anaerobic HRT. Biotechnol. Bioeng. 2016;113: 2377-2385. © 2016 Wiley Periodicals, Inc.

show abstract

Effect of particulate organic substrate on aerobic granulation and operating conditions of sequencing batch reactors

Cited by 98 publications

References 35 publications

Effect of extended famine conditions on aerobic granular sludge stability in the treatment of brewery wastewater

Effect of extended famine conditions on aerobic granular sludge stability in the treatment of brewery wastewater

The mechanisms of granulation of activated sludge in wastewater treatment, its optimization, and impact on effluent quality

Potential of hydrolysis of particulate COD in extended anaerobic conditions to enhance biological phosphorous removal

Contact Info

Product

Resources

About