Abstract
The new sugar reform in EU has lead to a reduced price on sugar, and consequently on sugar beets produced for sugar production in Sweden. The high content of convertible carbohydrates in sugar beets make them suitable for bioenergy production and the price on sugar beets would not change if they are used in a bioenergy purpose. Thus, the sugar beet production in Sweden would still be profitable. The limiting factor is the short storage capability of sugar beets, and to be able to use them for a longer period, the storage time needs to be prolonged. Biogas and bioethanol are both renewable energy sources and seen as promising alternative fuels. Biogas is produced through anaerobic digestion of a wide range of organic materials, while bioethanol mainly is produced from different sugar crops and grains by fermentation. Previously the biopreservation organisms Pseudomonas fluoresence KJ36 and Candida oleophila JA3 had been isolated from sugar beets and shown to inhibit various fungal pathogens on agar medium. Hoping to prolong the storage time for sugar beets, a model scale storage study was set up with the biocontrol organisms Candida oleophila JA3 and Pseudomonas fluoresence KJ36. Small cubes of sugar beets were stored for one and four months at 10°C and 15°C. Microbial growth during storage was determined trough viable count and the effect of the biocontrol organisms was then analysed with regard to biogas and ethanol production through anaerobic digestion and fermentation experiments. To evaluate the effect of the biocontrol microorganisms on sugar content during storage, sucrose, glucose and fructose concentrations were determined through HPAEC-PAD analysis. From this study, it can be concluded that the biopreservation organisms Pseudomonas fluoresence KJ36 and Candida oleophila JA3 did not to inhibit various fungal pathogens. The endogenous bacteria increased in number and consequently do not seem to be affected by biopreservation organisms on the surface of the sugar beet cubes. Neither was mould growth on the surface inhibited. Consequently, the effect on sugar content and therefore also on the ethanol production potential was negative. The biocontrol and spoilage organisms have decreased the yield by decreasing the sugar content and subsequent ethanol yield from samples stored for four months. The biogas production from the beet samples decreased with storage time due to the consumption of organic material by the biocontrol and spoilage organisms. The storage time of sugar beets cannot be prolonged using the biocontrol organisms Pseudomonas fluoresence KJ36 and Candida oleophila JA3.
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Claims 6
Claim · model-written summary
The biopreservation organisms Pseudomonas fluoresence KJ36 and Candida oleophila JA3 did not inhibit various fungal pathogens on sugar beets.
- Taxon
- sugar beets
Beta vulgaris subsp. vulgarist0 - Treatment
- biopreservation organismse1
- Interactor
- fungal pathogense1pathogen
- Second interactor
- Pseudomonas fluoresence KJ36e1biocontrol_agent
- Outcome
- inhibit various fungal pathogense1
- Direction
- did note1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Storage of sugar beets for biofuel production using biocontrol microorganisms”
e1“the biopreservation organisms Pseudomonas fluoresence KJ36 and Candida oleophila JA3 did not to inhibit various fungal pathogens”
Claim · model-written summary
Endogenous bacteria on the surface of sugar beet cubes increased in number and were not affected by the biopreservation organisms.
- Taxon
- sugar beetsBeta vulgaris subsp. vulgarist0
- Organ / stage
- surface of the sugar beet cubese2
- Interactor
- endogenous bacteriae2other
- Outcome
- endogenous bacteriae2
- Direction
- increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Storage of sugar beets for biofuel production using biocontrol microorganisms”
e2“The endogenous bacteria increased in number and consequently do not seem to be affected by biopreservation organisms on the surface of the sugar beet cubes”
Claim · model-written summary
Mould growth on the surface of sugar beet cubes was not inhibited.
- Taxon
- sugar beetsBeta vulgaris subsp. vulgarist0
- Organ / stage
- surfacee3
- Outcome
- mould growth on the surfacee3
- Direction
- inhibitede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Storage of sugar beets for biofuel production using biocontrol microorganisms”
e3“Neither was mould growth on the surface inhibited”
Claim · model-written summary
Biocontrol and spoilage organisms decreased sugar content and subsequent ethanol yield in sugar beet samples stored for four months.
- Taxon
- sugar beetsBeta vulgaris subsp. vulgarist0
- Treatment
- biocontrol and spoilage organismse4
- Outcome
- sugar content and subsequent ethanol yielde4
- Direction
- decreasinge4
- Qualifier
- samples stored for four monthse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Storage of sugar beets for biofuel production using biocontrol microorganisms”
e4“The biocontrol and spoilage organisms have decreased the yield by decreasing the sugar content and subsequent ethanol yield from samples stored for four months”
Claim · model-written summary
Biogas production from sugar beet samples decreased with storage time, which the authors attribute to consumption of organic material by the biocontrol and spoilage organisms.
- Taxon
- sugar beetsBeta vulgaris subsp. vulgarist0
- Treatment
- storage timee5
- Outcome
- biogas productione5
- Direction
- decreasede5
- Qualifier
- consumption of organic material by the biocontrol and spoilage organismse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Storage of sugar beets for biofuel production using biocontrol microorganisms”
e5“The biogas production from the beet samples decreased with storage time due to the consumption of organic material by the biocontrol and spoilage organisms”
Claim · model-written summary
The storage time of sugar beets cannot be prolonged using Pseudomonas fluoresence KJ36 and Candida oleophila JA3.
- Taxon
- sugar beetsBeta vulgaris subsp. vulgarist0
- Interactor
- Pseudomonas fluoresence KJ36e6biocontrol_agent
- Second interactor
- Candida oleophila JA3Dujonia oleophilae6biocontrol_agent
- Outcome
- storage time of sugar beets cannot be prolongede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Storage of sugar beets for biofuel production using biocontrol microorganisms”
e6“The storage time of sugar beets cannot be prolonged using the biocontrol organisms Pseudomonas fluoresence KJ36 and Candida oleophila JA3”