Efficient production of l-lactic acid with high optical purity by alkaliphilic Bacillus sp. WL-S20

► A newly isolated alkaliphile able to efficiently produce l-lactic acid. ► Produced l-lactate with high yield, high production titer and high optical purity. ► Used inexpensive peanut meal as nitrogen source. ► Used sodium hydroxide as the neutralizing agent preventing environmental problems.