The influence of starvation phase on the properties and the development of aerobic granules

Li, Zhi Hua; Kondo, Takahiro; Kusuda, Tetsuya

doi:10.1016/j.enzmictec.2005.07.020

Cited by 85 publications

(39 citation statements)

References 17 publications

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“…The idle phase of 35-40 min applied on the bioreactor configuration during granulation also indicates that longer starvation time is required to form AGS p with high biomass concentration in the R p . This is in agreement with the studies by Liu and Tay (2004a,b) and Li et al (2006). With the high biomass concentration over the AGS np , it is supposed that the phototrophic facultative anaerobic bacteria have comfortably resided in the inner part of granules.…”

Section: Biomass Concentrationssupporting

confidence: 86%

“…With the high biomass concentration over the AGS np , it is supposed that the phototrophic facultative anaerobic bacteria have comfortably resided in the inner part of granules. It is obvious that a shorter starvation time leads to the production of lower biomass concentration of AGS p and the difference of the formation time is also significant, also observed by Pijuan et al (2009) andLi et al (2006). Fig.…”

Section: Biomass Concentrationssupporting

confidence: 51%

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A proposed aerobic granules size development scheme for aerobic granulation process

Dahalan

Abdullah

Yuzir

et al. 2015

Bioresource Technology

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Aerobic granulation is increasingly used in wastewater treatment due to its unique physical properties and microbial functionalities. Granule size defines the physical properties of granules based on biomass accumulation. This study aims to determine the profile of size development under two physicochemical conditions. Two identical bioreactors namely Rnp and Rp were operated under non-phototrophic and phototrophic conditions, respectively. An illustrative scheme was developed to comprehend the mechanism of size development that delineates the granular size throughout the granulation. Observations on granules' size variation have shown that activated sludge revolutionised into the form of aerobic granules through the increase of biomass concentration in bioreactors which also determined the changes of granule size. Both reactors demonstrated that size transformed in a similar trend when tested with and without illumination. Thus, different types of aerobic granules may increase in size in the same way as recommended in the aerobic granule size development scheme.

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Section: Biomass Concentrationssupporting

confidence: 86%

Section: Biomass Concentrationssupporting

confidence: 51%

A proposed aerobic granules size development scheme for aerobic granulation process

Dahalan

Abdullah

Yuzir

et al. 2015

Bioresource Technology

View full text Add to dashboard Cite

show abstract

“…Similarly, the concentration factor was reduced as the excess substrate produced loose polymers, adding mass to the flocs. As the aggregation was dependent upon the amount of flocculating bacteria and their stress level, optimum dosage occurred when the growth of bacteria was stimulated but depleted soon afterward (Bossier and Verstraete 1996;Li et al 2006). This observation agrees well with previous work on production of yeast, Saccharomyces cerevisiae, where an increase in glucose concentration did not increase flocculating activities (Chang et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Microbial flocculation, a potentially low-cost harvesting technique for marine microalgae for the production of biodiesel

2008

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Microbial flocculation is investigated as a separation technique for harvesting marine microalgae for the production of biodiesel. Organic carbon (acetate, glucose or glycerine) was used as substrate for the growth of flocculating microbes in situ. Under stress, due to nutrient depletion, these microbes produced extracellular polymeric substances that promote flocculation of the coccolithophorid alga, Pleurochrysis carterae. Maximum recovery efficiency was achieved at low concentration of organic substrate (0.1 g L −1 ) and with a long mixing time (24 h); an average recovery efficiency of over 90% and a concentration factor of 226 were achieved. The recovery efficiency is positively correlated with mixing time (R 2 =0.90). The concentration factor is negatively correlated to the product of substrate concentration and mixing time (R 2 =0.73). The microalgae cells were not under stress and remained viable, thus potentially allowing media to be reused in large-scale processes without further treatment. Other advantages of the process are that no metallic flocculants were required and the organic substrates are readily available, e.g. glycerine is a byproduct of biodiesel production and acetic acid may be produced by anaerobic digestion of the biomass residue after lipid extraction. Further research is required to optimise the process.

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“…26 Li et al found that EPS play an important role in bacterial aggregation. 28 In a biofilter, the stability of microbial aggregates is essential for biofilm formation and the adhesion of microorganisms (biofilm or biofloc) onto a solid surface. This experiment focused mainly on the hydrophobicity of microbial cells because hydrophobicity is an important parameter that represents the essential surface characteristics.…”

Section: Influence Of Eps On Cell Hydrophobicitymentioning

confidence: 99%

Influence of extracellular polymeric substances on microbial activity and cell hydrophobicity in biofilms

Gao

Zhu

et al. 2007

J of Chemical Tech & Biotech

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The influence of starvation phase on the properties and the development of aerobic granules

Cited by 85 publications

References 17 publications

A proposed aerobic granules size development scheme for aerobic granulation process

A proposed aerobic granules size development scheme for aerobic granulation process

Microbial flocculation, a potentially low-cost harvesting technique for marine microalgae for the production of biodiesel

Influence of extracellular polymeric substances on microbial activity and cell hydrophobicity in biofilms

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