10.22376/ijpbs.2019.10.1.p1-12 Volume 6 Issue 1 2015 (January - March) In the current study an attempt was made to standardize various parameters to increase the production of bioethanol from fruit pulp and peel waste. lessThan i greaterThan Citrus limetta lessThan /i greaterThan pulp lessThan i greaterThan , Citrus maxima lessThan /i greaterThan pulp and peel were used. Hot water pretreatment was found to be best suitable than that of dilute acid pretreatment. pH 3 was found to be more effective for fermentation reactions. Two different enzymes pectinase and α-amylase was used in combination with three different organisms, namely lessThan i greaterThan Saccharomyces cerevisiae, Kluyveromyces marixianus lessThan /i greaterThan and lessThan i greaterThan Zymomonas mobilis lessThan /i greaterThan at room temperature and 50°C. In lessThan i greaterThan Citrus limetta lessThan /i greaterThan pulp and lessThan i greaterThan Citrus maxima lessThan /i greaterThan pulp and peel the highest ethanol yield (24.61%) was obtained at pH 3 using Pectinase enzyme and lessThan i greaterThan Kluyveromyces marixianus lessThan /i greaterThan maintained at 50 lessThan sup greaterThan 0 lessThan /sup greaterThan C. DEEPA M. A., MARUSHKA DA COSTA AND A. MONICA HRIIYIA Bioethanol, Citrus limetta, Citrus maxima, batch fermentation, pulp waste, peel waste 567-578