Added-value processing of ‘algae waste': 4th quarterly report
Project report
Title | Added-value processing of ‘algae waste': 4th quarterly report |
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Report Type | Project report |
Authors | Trzcinski, Antoine (Author), Hernandez, Ernesto (Author) and Webb, Colin (Author) |
Institution of Origin | Manchester University |
Number of Pages | 92 |
Year | 2011 |
Publisher | University of Manchester |
Abstract | Background - This fourth and last report provides the design data for the construction of a full-scale algae plant. These results were obtained during one and a half year study being conducted at the Satake Centre for Grain Process Engineering in the University of Manchester. The study investigated the feasibility of producing value-added products from algae. Executive summary - The gathering of data from previous reports has been used for the detailed design of a full process pilot plant to utilise the algae wastes. This report is divided in two main sections. The first one details further experiments carried out to obtain the necessary data or information for the design of the full scale plant and the second section consists in a manual for the use of the Excel file where the process has been modelled. In the experimental section a set of experiments was carried in aerobic and anoxic conditions to see the effect on glucose production. It was shown that it is better to keep the system closed so that we avoid contamination by airborne bacteria. If the system is kept close and there is no contamination then there is no need to flush the headspace with nitrogen. It was also previously shown that mixing was not required and could even be detrimental because it would enhance the transfer of oxygen to potential microorganism. For these reasons it is more sensible to use a plug flow type of reactor instead of a stirred tank. Both systems have however been sized in this report, and it is known that a plug flow would always give a higher conversion than a CSTR for the same volume. As far as the microbial oil fermentation step is concerned it was shown that R. turoloides could grow in the glucose rich liquor obtained after the 55°C step and that the yeast could grow without any significant difference in dry cell weight at various concentrations of NaCl up to 55 g/L (seawater: 35 g/L). In fact the microscopic pictures revealed that the cells and the lipid vacuoles were bigger at higher salinity. The growth of the yeast was confirmed in non-sterile environment where bacteria were present. |
ANZSRC Field of Research 2020 | 310603. Fermentation |
310605. Industrial microbiology (incl. biofeedstocks) | |
310602. Bioprocessing, bioproduction and bioproducts | |
Public Notes | Confidential. |
Byline Affiliations | University of Manchester, United Kingdom |
https://research.usq.edu.au/item/q4w60/added-value-processing-of-algae-waste-4th-quarterly-report
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