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Use of mealworm (Tenebrio molitor) for isolation of polyhydroxyalkanoates from bacterial biomass and simultaneous production of food
Najbrtová, Johana ; Slaninová, Eva (referee) ; Obruča, Stanislav (advisor)
This bachelor thesis deals with the use of mealworms (Tenebrio molitor) to isolate polyhydroxyalkanoates from bacterial biomass and current food production. Cupravidus necator H16 and Schlegelella thermodepolymerans were used to prepare bacterial biomass containing polyhydroxyalkanoates (PHA). The ability of mealworms to isolate PHA from bacterial biomass of various types was determined. First, the content of PHA and crude proteins in individual types of biomasses was determined. Subsequently, two biological isolation experiments were performed, in both cases the results were compared with a control sample that consumed bran. The conversion of feed into the form of fecal pellets was monitored, where the best results were obtained from a sample of mealworms fed with dried biomass C. necator H16. Furthermore, the weight loss during the experiment, the percentage of survivors, the amount of feed not consumed, and the number of pupae were evaluated. The fecal pellets obtained by biological isolation had a low PHA content and were therefore subjected to purification. The reagent with the best results was 0,1 M NaOH. Another part of this work was to determine the crude protein content of mealworm flour made from mealworms from experiment two. The sample fed with biomass produced by Schlegelella thermodepolymerans had the highest protein content.
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Use of mealworm (Tenebrio molitor) for isolation of polyhydroxyalkanoates from bacterial biomass and simultaneous production of food
Najbrtová, Johana ; Slaninová, Eva (referee) ; Obruča, Stanislav (advisor)
This bachelor thesis deals with the use of mealworms (Tenebrio molitor) to isolate polyhydroxyalkanoates from bacterial biomass and current food production. Cupravidus necator H16 and Schlegelella thermodepolymerans were used to prepare bacterial biomass containing polyhydroxyalkanoates (PHA). The ability of mealworms to isolate PHA from bacterial biomass of various types was determined. First, the content of PHA and crude proteins in individual types of biomasses was determined. Subsequently, two biological isolation experiments were performed, in both cases the results were compared with a control sample that consumed bran. The conversion of feed into the form of fecal pellets was monitored, where the best results were obtained from a sample of mealworms fed with dried biomass C. necator H16. Furthermore, the weight loss during the experiment, the percentage of survivors, the amount of feed not consumed, and the number of pupae were evaluated. The fecal pellets obtained by biological isolation had a low PHA content and were therefore subjected to purification. The reagent with the best results was 0,1 M NaOH. Another part of this work was to determine the crude protein content of mealworm flour made from mealworms from experiment two. The sample fed with biomass produced by Schlegelella thermodepolymerans had the highest protein content.
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