L-malic acid is one of tricarboxylic acid cycle in organism and exists widely in apple fruits. It odors remarkable and its acid flavor is soft and fresh. Mixed with citric acid, natural fruit flavor can be imitated. It can be used as acid flavor and conditioner in food and also an additional component in amino acid infusion for curing burning patients to increase amino acid utilization and promote the wound heal in pharmaceutical industry. It can also be used to cure assistantly anaemia and liver function exhaustion if it added in medicine to increase the medical stability and promote the absorption in human body. Its utilization can be in fuel, chemical and building materials.
The selling price of L-malic acid is about 50 thousand yuan/ton, the cost of it is about 20 thousand yuan by direct fermentation. The economic benefit is notable.