Enhancement of biodiesel production by cultivating Dipodascaceae moderated-filamentous granular sludge with sugar-containing wastewater

Li, Mei-xi; Li, Anjie; Sun, Qu; Jiang, Xiaohui; Chen, Shu-han

doi:10.1016/j.ibiod.2016.02.015

Cited by 19 publications

(4 citation statements)

References 24 publications

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“…Dipodascaceae are white filamentous fungi belonging to the order of Saccharomycetales. Microorganisms belonging to this family have been previously shown to have an ability to elevate granular sludge lipid accumulation due to the production of linoleic acid [60]. For example, species Geotrichum candidum , referred to as “machinery mould,” is a common species belonging to Dipodascaceae family and is ubiquitously present in the natural environment [61].…”

Section: Discussionmentioning

confidence: 99%

The occurrence of Listeria monocytogenes is associated with built environment microbiota in three tree fruit processing facilities

et al. 2019

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Background Multistate foodborne disease outbreaks and recalls of apples and apple products contaminated with Listeria monocytogenes demonstrate the need for improved pathogen control in the apple supply chain. Apple processing facilities have been identified in the past as potential sources of persisting L . monocytogenes contamination. In this study, we sought to understand the composition of microbiota in built apple and other tree fruit processing environments and its association with the occurrence of the foodborne pathogen L . monocytogenes . Results Analysis of 117 samples collected from three apple and other tree fruit packing facilities (F1, F2, and F3) showed that facility F2 had a significantly higher L . monocytogenes occurrence compared to F1 and F3 ( p < 0.01). The microbiota in facility F2 was distinct compared to facilities F1 and F3 as supported by the mean Shannon index for bacterial and fungal alpha diversities that was significantly lower in F2, compared to F1 and F3 ( p < 0.01). Microbiota in F2 was uniquely predominated by bacterial family Pseudomonadaceae and fungal family Dipodascaceae. Conclusions The composition and diversity of microbiota and mycobiota present in the investigated built food processing environments may be indicative of persistent contamination with L . monocytogenes . These findings support the need for further investigation of the role of the microbial communities in the persistence of L . monocytogenes to support the optimization of L . monocytogenes control strategies in the apple supply chain. Electronic supplementary material The online version of this article (10.1186/s40168-019-0726-2) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

The occurrence of Listeria monocytogenes is associated with built environment microbiota in three tree fruit processing facilities

et al. 2019

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“…The effluent glucose and ammoniumnitrogen concentrations were determined via the phenol-sulfuric acid method (Gerhardt et al, 1994) and Nessler's reagent colorimetry, respectively. The microbial population structure was analysed by high-throughput sequencing on an Illumina MiSeq PE300 platform (Li et al, 2016).…”

Section: Methodsmentioning

confidence: 99%

“…A condenser was used to minimize the loss of methanol and hexane due to evaporation with water at room temperature. After the transesterification was completed, the fatty acid methyl esters (FAMEs) were extracted, pooled, dried, re-dissolved and analysed by GC-FID based on the procedure presented in a previous study (Li et al, 2016).…”

Section: In Situ Transesterificationmentioning

confidence: 99%

Biodiesel production from granular sludge fed with sugar-containing wastewater

Li¹,

Li²,

Jiang³

2017

Desalination and Water Treatment

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a b s t r ac tUtilizing excess sludge from wastewater treatment plant to produce biodiesel is becoming increasingly popular, but it has been limited by the low lipid content in activated sludge. This study was designed to enhance biodiesel production from granular sludge fed with synthetic sugar-containing wastewater. The experiments were conducted in two 1.2-L sequencing batch reactors under different sludge settling times to cultivate granular sludge and activated sludge. The biodiesel yield of the granular sludge (30.14 ± 0.73 mg/g suspended solids [SS]) was higher than that of the activated sludge (21.56 ± 0.95 mg/g SS) with the same feedings. The distributions of fatty acid methyl esters varied among the seed sludge, the cultured sludge flocs and the granular sludge. Methyl 14-methylpentadecanoate (14MeC15:0), methyl oleate (C18:1) and methyl linoleate (C18:2) were the three components of the biodiesel produced from the granular sludge that increased the fastest, which might promote the heating value and the low temperature fluidity of biodiesel. The remarkable change of microbial community and the dominance of filamentous fungi Phialophora after sludge granulation might contribute to the intrinsic change in the fatty acids, which resulted in a higher yield and a better quality of biodiesel.

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“…Ding Jie et al [18] used Candida to degrade aqueous phenol through experiments, and the results showed that Candida could significantly improve the degradation rate of phenol. A variety of yeasts identified in YX_3 fermentation group such as unclassified_f_Dipodascaceae, Bipedal Cysts, white filamentous fungus [19], and Dipodascaceae are tolerant to cellulose washing solution [20]. samples were arranged in descending order of abundance, and the top 30 functions in the samples were annotated, as shown in figure 3.…”

Section: Analysis Of Fungal Community Structure At Genus Levelmentioning

confidence: 99%

Effect of Different Excipients on Fungal Flora during Aerobic Fermentation of Thermal Hydrolyzed Kitchen Waste

Wang

Song

et al. 2023

J. Phys.: Conf. Ser.

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In this paper, a comparative study was conducted on the aerobic fermentation of kitchen waste pretreated by thermal hydrolysis and three different excipients, the dynamic changes of temperature and organic matter of kitchen waste after thermal hydrolysis were measured during aerobic fermentation with peanut shell, corn stalk and corn cob as additives, and high-throughput sequencing was performed on the samples of the three excipients in the high temperature fermentation stage to identify the dominant bacterial community in the high temperature region of different excipients. The results showed that the dominant bacterial communities of peanut shell, corn stalk and corn cob were similar at the phylum classification level. Among them, Ascomycota accounted for 97.68%, 99.55% and 99.98% in HS, YM and YX treatment groups, respectively, which means it was the absolute dominant fungal phyla in high temperature fermentation stage. At the level of genus classification, there were differences among the dominant bacterial genera in each group. The main bacterial genera in peanut shell treatment group were Aspergillus, unclassified_f__Dipodascaceae, Penicillium, unclassified_o__Sordariales, Candida and Diutina. The main bacterial genera in corn stalk treatment group were Candida, Aspergillus and Penicillium. The main bacteria in corn cob treatment group was unclassified_o__Sordariales. The percentage of saprophytic fungi in HS, YM and YX high-temperature treatment groups was 96.40%, 99.25% and 99.97%, respectively. Saprophytic fungi played a major role in the high-temperature fermentation stage.

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Enhancement of biodiesel production by cultivating Dipodascaceae moderated-filamentous granular sludge with sugar-containing wastewater

Cited by 19 publications

References 24 publications

The occurrence of Listeria monocytogenes is associated with built environment microbiota in three tree fruit processing facilities

The occurrence of Listeria monocytogenes is associated with built environment microbiota in three tree fruit processing facilities

Biodiesel production from granular sludge fed with sugar-containing wastewater

Effect of Different Excipients on Fungal Flora during Aerobic Fermentation of Thermal Hydrolyzed Kitchen Waste

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