“…Molasses (Garg & Sharma, 1992;Park & Barathi, 1991;Esuoso Kayode, 1994), cheese whey (El-Samragy, Khorshid, Foda, & Shehata, 1996), whey permeate (Hossain, Brooks, & Maddox, 1983), date syrup (Roukas & Kotzekidou, 1997), banana extract (Sassi, Ruggeri, Specchia, & Gianetto, 1991), maize zea (Esuoso Koyode, Oderinde Rotini, & Okogun Joseph, 1991), orange processing waste (Aravantinoszafiris, Tzia, Oreopaulai, & Thomopoulos, 1994), yam bean starch (Sarangbin & Watanapakansin, 1999) rape seed oil (Earyst, 1998), carob pod (Fyllos, 1998) and root crops (Angumeenal, Kamalakannan, Prabhu, & Venkappayya, 2003) are some among them. We have chosen in this study, a hitherto untried Artocarpus heterophyllus (jack fruit) carpel fibre as a substrate for biosynthesis of citric acid fermentation using Aspergillus niger.…”