Use of okara waste for algae nutrition

Abstract EN

Chlorella vulgaris belonging to chlorophyta and nannochloropsis oculata belonging to chrytho-phyta were used in the current study to evaluate whether their successive indoor growth using in-dustrial food waste (okara) as a growth medium enriched with organic carbon and nitrogen the basic nutrient solutions were bg-ii for chlorella, while f2 was used for nannochloropsis growth.

okara was used in four concentrations ( 25 , 50 , 75 and 100% ) verses to control and based on its initial nitrogen content.

original waste was diluted by 4 fold of tape water prior inoculation.

the inves-tigated parameters were dry weigh (g.l-1); total chlorophyll (mg.l-1) and total carotenoids (mg.l-1).

maximum dry weight of chlorella was obtained with 25% of okara waste.

as for nannochloropsis, a slight increase was observed with all okara con-centrations used.

lower okara concentration (25%) enhanced chlorophyll accumulation by chlorella vulgaris, while higher concentration (100%) reached the maximum with nannochloropsis ocula-ta.

completely opposite pattern was observed with total carotene.