Bioconversion of Vegetable and Fruit Peel Wastes in viable product

Increasing concern about pollution that occurs from agriculture and industrial wastes has stimulated the interest in converting waste material into commercially valuable products. The fermentable sugar in fruit peels were quite comparable (14.6-15.2 w/v). However, in turnip peel extract it was low in accordance to sugar content of vegetable. The compositions suggest the feasibility of using the fermentative production of alcohol and biomass (SCP). The results showed that the substrate support both growth and alcohol production. The maximum production of alcohol was produced within 36hrs of fermentation in papaya peels extract followed by banana and apple peel extract (5.90- 4.94%). In case of turnip peel extract the alcohol produced was 1.5 % (w/v). Almost 85-95% was observed in all four different set of experiment. Further utilization of sugar from the waste corresponds to the biomass production (saccharomyces cerevisiae). It was found that of the total fermentable sugars present almost 94-98% was converted to yield biomass in batch submerged fermentation. The highest productivity was 0.83, 0.53 and 0.14g/l/h for papaya , apple and turnip peel extract respectively after 48h of incubation . However, in case of banana peel extract the highest productivity of 0.63g/l/h was observed after 24h.of incubation. The biomass obtained was compared with available food and feed grade SCP. The comparison with SCP obtained from peels waste and commercial samples, the former shows the higher values than food grade yeast than feed grade protein. The carbohydrate content was much lower than recorded value of market yeast (food grade), though peels extract were all from edible fruits and vegetables. Keywords : submerged, fermentation, SCP.