In this study, biodiesel production cost in Hong Kong from WCO as a feedstock is estimated.
The use of acid and base catalysts for the biodiesel production are found to be less expensive ($0.80 and
$0.90) than the average biodiesel price in Hong Kong ($1.01). Acid catalyzed method is the most
cost-effective production process. On the other hand, application of lipase as a catalyst is found to be
expensive ($1.15). In addition, production of biodiesel using acid and base as catalysts can withstand
variations from the WCO and biodiesel prices.