The maximal tested solid loading of 43.2% (w/v) corresponds to
the solid content of Food Waste B and this was also the maximal
loading that could be effectively stirred using the bioreactor equipment
used. The obtained hydrolysate consisted of 143 g L1 of glucose,
1.8 g L1 of FAN and 1.6 g L1 of phosphate. These
concentrations are more than sufficiently high in order to prevent
early nutrient limitations as reported in previous cultivations of
bacteria and microalgae on food and bakery hydrolysates
The concentrations
of nutrients even allow the design of fed-batch cultures
where a hydrolysate rich in glucose and FAN is required. Additionally,
the outcomes of the present study open the path for preparation
of hydrolysates with targeted nutrient concentrations, to be
used in continuous flow cultures, by selecting an appropriate
fungal treatment e.g. only A. awamori or A. oryzae, or both, and
by using the right amount of food waste.
The maximal tested solid loading of 43.2% (w/v) corresponds to
the solid content of Food Waste B and this was also the maximal
loading that could be effectively stirred using the bioreactor equipment
used. The obtained hydrolysate consisted of 143 g L1 of glucose,
1.8 g L1 of FAN and 1.6 g L1 of phosphate. These
concentrations are more than sufficiently high in order to prevent
early nutrient limitations as reported in previous cultivations of
bacteria and microalgae on food and bakery hydrolysates
The concentrations
of nutrients even allow the design of fed-batch cultures
where a hydrolysate rich in glucose and FAN is required. Additionally,
the outcomes of the present study open the path for preparation
of hydrolysates with targeted nutrient concentrations, to be
used in continuous flow cultures, by selecting an appropriate
fungal treatment e.g. only A. awamori or A. oryzae, or both, and
by using the right amount of food waste.
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