Photofermentaion and lipid accumulation by Rhodobacter sp. KKU-PS1 using malic acid as a substrate

Assawamongkholsiri, Thitirut; Plangklang, Pensri; Reungsang, Alissara

doi:10.1016/j.ijhydene.2016.02.118

Cited by 10 publications

(4 citation statements)

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“…KKU-PS1. In our previous study, a carbon excess and nitrogen limited condition (equivalent to a C/N ratio of 132) was suitable for lipid accumulation by KKU-PS1 and gave the higest lipid content and production of 25.4% (w/w) and 592 mg lipid/L, respectively (Assawamongkholsiri, Plangklang & Reungsang, 2016). Kim et al (2013) reported that a maximum fatty acid productivity of 665 mg fatty acid/L d was attained at lactate concentration of 100 mM.…”

Section: Resultsmentioning

confidence: 99%

“…Fatty acid compositions were analyzed using gas chromatography–mass spectrometry (GC-MS) according to the modified method of Unagul et al (2007). The modified methods were briefly explained in Assawamongkholsiri, Plangklang & Reungsang (2016).…”

Section: Methodsmentioning

confidence: 99%

“…The unsustainability of fossil fuel consumption and the climate change resulting from fossil fuel combustion have stimulated strategies for developing alternative energy sources that are renewable and eco-friendly (Sagnak & Kargi, 2011). Among the biofuels, bio-hydrogen and biodiesel are considered important alternative energy resources (Assawamongkholsiri, Plangklang & Reungsang, 2016; Assawamongkholsiri et al, 2018; Bagy et al, 2014; Carlozzi et al, 2010). The requirement of hydrogen gas worldwide is 50 million tonnes per year with a growth rate of about 10% per year (Winter, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Purple non-sulfur photosynthetic bacteria (PNSB) such as Rhodobacter sphaeroides KKU-PS5, R. sphaeroides KD131, R. sphaeroides O.U. 001, and Rhodopseudomonas palustris WP3-5 have the capacity to convert hydrogen from a single organic acid (Assawamongkholsiri, Plangklang & Reungsang, 2016; Assawamongkholsiri & Reungsang, 2015; Laocharoen & Reungsang, 2014) and mixed volatile fatty acids (VFAs), which are the major substrates in dark fermentation effluents (Lo et al, 2011; Uyar et al, 2009; Yang et al, 2012). Moreover, a variety of wastewaters such as brewery wastewater (Hay et al, 2017; Seifert, Waligorska & Laniecki, 2010a), dairy wastewater (Seifert, Waligorska & Laniecki, 2010b), sugar industry wastes (Assawamongkholsiri et al, 2018; Keskin & Hallenbeck, 2012) and effluent from dark fermentation processes (Argun, Kargi & Kapdan, 2008; Ozmihci & Kargi, 2010; Sagnak & Kargi, 2011) can be used by PNSB.…”

Section: Introductionmentioning

confidence: 99%

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Photo-hydrogen and lipid production from lactate, acetate, butyrate, and sugar manufacturing wastewater with an alternative nitrogen source byRhodobactersp.KKU-PS1

Assawamongkholsiri¹,

Reungsang

Sittijunda

2019

PeerJ

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Photo-hydrogen and lipid production from individual synthetic volatile fatty acids (VFAs) and sugar manufacturing wastewater (SMW) by Rhodobacter sp. KKU-PS1 with sodium glutamate or Aji-L (i.e., waste from the process of crystallizing monosodium glutamate) as a nitrogen source was investigated. Using individual synthetic VFAs, the maximum hydrogen production was achieved with Aji-L as a nitrogen source rather than sodium glutamate. The maximum hydrogen production was 1,727, 754 and 1,353 mL H2/L, respectively, using 25 mM of lactate, 40 mM of acetate and 15mM of butyrate as substrates. Under these conditions, lipid was produced in the range of 10.6–16.9% (w/w). Subsequently, photo-hydrogen and lipid production from SMW using Aji-L as nitrogen source was conducted. Maximal hydrogen production and hydrogen yields of 1,672 mL H2/L and 1.92 mol H2/mol substrate, respectively, were obtained. Additionally, lipid content and lipid production of 21.3% (w/w) and 475 mg lipid/L were achieved. The analysis of the lipid and fatty acid components revealed that triacyglycerol (TAG) and C18:1 methyl ester were the main lipid and fatty acid components, respectively, found in Rhodobacter sp. KKU-PS1 cells.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photo-hydrogen and lipid production from lactate, acetate, butyrate, and sugar manufacturing wastewater with an alternative nitrogen source byRhodobactersp.KKU-PS1

Assawamongkholsiri¹,

Reungsang

Sittijunda

2019

PeerJ

Self Cite

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Hydrogen from Photo Fermentation

Reungsang

Zhong

Yang

et al. 2018

Green Energy and Technology

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Effect of carbon sources on the aggregation of photo fermentative bacteria induced by L-cysteine for enhancing hydrogen production

Xie

Liu

Ding

et al. 2016

Environ Sci Pollut Res

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Poor flocculation of photo fermentative bacteria resulting in continuous biomass washout from photobioreactor is a critical challenge to achieve rapid and stable hydrogen production. In this work, the aggregation of Rhodopseudomonas faecalis RLD-53 was successfully developed in a photobioreactor and the effects of different carbon sources on hydrogen production and aggregation ability were investigated. Extracellular polymeric substances (EPS) production by R. faecalis RLD-53 cultivated using different carbon sources were stimulated by addition of L-cysteine. The absolute ζ potentials of R. faecalis RLD-53 were considerably decreased with addition of L-cysteine, and aggregation barriers based on DLVO dropped to 15-43 % of that in control groups. Thus, R. faecalis RLD-53 flocculated effectively, and aggregation abilities of strain RLD-53 cultivated with acetate, propionate, lactate and malate reached 29.35, 32.34, 26.07 and 24.86 %, respectively. In the continuous test, hydrogen-producing activity was also promoted and reached 2.45 mol H/mol lactate, 3.87 mol H/mol propionate and 5.10 mol H/mol malate, respectively. Therefore, the aggregation of R. faecalis RLD-53 induced by L-cysteine is independent on the substrate types, which ensures the wide application of this technology to enhance hydrogen recovery from wastewater dominated by different organic substrates.

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Photofermentaion and lipid accumulation by Rhodobacter sp. KKU-PS1 using malic acid as a substrate

Cited by 10 publications

References 50 publications

Photo-hydrogen and lipid production from lactate, acetate, butyrate, and sugar manufacturing wastewater with an alternative nitrogen source byRhodobactersp.KKU-PS1

Photo-hydrogen and lipid production from lactate, acetate, butyrate, and sugar manufacturing wastewater with an alternative nitrogen source byRhodobactersp.KKU-PS1

Hydrogen from Photo Fermentation

Effect of carbon sources on the aggregation of photo fermentative bacteria induced by L-cysteine for enhancing hydrogen production

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