The link of feast-phase dissolved oxygen (DO) with substrate competition and microbial selection in PHA production

Wang, Xiaofei; Oehmen, Adrian; Freitas, Elisabete B.; Carvalho, Gilda; Reis, Maria A.M.

doi:10.1016/j.watres.2017.01.064

Cited by 92 publications

(37 citation statements)

References 37 publications

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“…The average yield was 0.49±0.10 mgCOD PHA/mgCOD VFA at all DO levels, excluding anoxic conditions. The yield agreed well with previous experience with acetate as substrate (0.52 mgCOD PHA/mgCOD VFA), in PHA accumulation tests using the same surplus activated sludge [5,18].…”

Section: Resultssupporting

confidence: 88%

Application of dissolved oxygen (DO) level control for polyhydroxyalkanoate (PHA) accumulation with concurrent nitrification in surplus municipal activated sludge

Wang¹,

Bengtsson²,

Oehmen

et al. 2019

New Biotechnology

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Section: Resultssupporting

confidence: 88%

Application of dissolved oxygen (DO) level control for polyhydroxyalkanoate (PHA) accumulation with concurrent nitrification in surplus municipal activated sludge

Wang¹,

Bengtsson²,

Oehmen

et al. 2019

New Biotechnology

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“…The reason why PHA accumulation was proven to be less sensitive to DO, compared to its effect on biomass growth, was explained by the fact that low DO levels limit the availability of ATP, while high DO supply provides surplus ATP and high growth rates (and consequently reduced PHA yield). In addition, when MMCs were fed with multiple VFAs (acetate, propionate, butyrate, and valerate) it was also shown that, during PHA accumulation, high DO concentration is required to reach maximum PHA accumulation rates due to low specific VFA uptake rates under low DO levels [ 130 ].…”

Section: Pha Production By Mixed Microbial Consortia (Mmc)mentioning

confidence: 99%

Recent Advances and Challenges towards Sustainable Polyhydroxyalkanoate (PHA) Production

et al. 2017

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Sustainable biofuels, biomaterials, and fine chemicals production is a critical matter that research teams around the globe are focusing on nowadays. Polyhydroxyalkanoates represent one of the biomaterials of the future due to their physicochemical properties, biodegradability, and biocompatibility. Designing efficient and economic bioprocesses, combined with the respective social and environmental benefits, has brought together scientists from different backgrounds highlighting the multidisciplinary character of such a venture. In the current review, challenges and opportunities regarding polyhydroxyalkanoate production are presented and discussed, covering key steps of their overall production process by applying pure and mixed culture biotechnology, from raw bioprocess development to downstream processing.

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“…The accumulations tests were carried out without oxygen limitation because during the accumulation phase in MMC was observed a higher PHA storage capacity under high DO concentration (Wang et al, 2017;Vargas et al, 2014).…”

Section: Accumulation Experimentsmentioning

confidence: 99%

Bioplastic recovery from wastewater: A new protocol for polyhydroxyalkanoates (PHA) extraction from mixed microbial cultures

Mannina

Presti

Montiel-Jarillo

et al. 2019

Bioresource Technology

135

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A new protocol for polyhydroxyalkanoates (PHA) extraction from mixed microbial cultures (MMCs) is proposed. PHA-accumulating capacity of the MMC was selected in a sequencing batch reactor (SBR) fed with a synthetic effluent emulating a fermented oil mill wastewater (OMW). The highest recovery yield and purity (74 ± 8% and 100 ± 5%, respectively) was obtained when using NH 4 -Laurate for which operating conditions of the extraction process such as temperature, concentration and contact time were optimized. Best conditions for PHA extraction from MMC turned to be: i) a pre-treatment with NaClO at 85°C with 1 h of contact time, followed by ii) a treatment with lauric acid in a ratio acid lauric to biomass of 2:1 and 3 h of contact time.

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The link of feast-phase dissolved oxygen (DO) with substrate competition and microbial selection in PHA production

Cited by 92 publications

References 37 publications

Application of dissolved oxygen (DO) level control for polyhydroxyalkanoate (PHA) accumulation with concurrent nitrification in surplus municipal activated sludge

Application of dissolved oxygen (DO) level control for polyhydroxyalkanoate (PHA) accumulation with concurrent nitrification in surplus municipal activated sludge

Recent Advances and Challenges towards Sustainable Polyhydroxyalkanoate (PHA) Production

Bioplastic recovery from wastewater: A new protocol for polyhydroxyalkanoates (PHA) extraction from mixed microbial cultures

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