Islamic Azad University (IAU)

Mixotrophic and heterotrophic growth of some microalgae using extract of fungal-treated wheat bran

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Background:In this study, wheat bran, an agricultural waste, was utilized as a low-cost carbon source for algal cultivation.

Results:Treatment of lignocellulosic waste by two fungal species (Pleurotus ostreatus or Trichoderma viride) caused the accumulation of reducing sugar at a relatively high concentration (50.58 and 54.30 mg/g wheat bran) after 7 days of incubation, respectively. The soluble products of treated wheat bran increased the growth, carbohydrate, and protein contents of both Chlorella vulgaris and Scenedesmus obliquusunder mixotrophic and heterotrophic conditions.

Conclusions:The obtained data suggest that soluble product of treated wheat bran could be used as an efficient medium for the mixotrophic and heterotrophic growth of both algal species

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