Orange as the main citrus fruit is one of top-five fruit
commodities that dominate the global fruit market. According
to Food and Agriculture Organization, global orange
production reached 68 million tons representing 8.5% of the
total fruit production [1]. The largest orange producers are
Brazil, United States of America, China, India, and Mexico
in 2012 [1]. Approximately, 40–60% of oranges are processed
for juice production, of which 50–60% ends up as waste
including seed, peel, and segment membrane [2, 3]. The
generation of these solid wastes is estimated to be in the
range of 15 to 25 million tons per year [3]. Among these
wastes, citrus peel is the major constituent accounting for
approximately 44% of the weight fruit mass [4].