PROCESS FOR PRODUCTION OF SUCCINIC ACID, AND PROCESS FOR PRODUCTION OF AMMONIUM SUCCINATE SOLUTION

摘要

The object is to produce an ammonium succinate solution which can be used for the production of fermentation-derived succinic acid, and whose all by-products can be re-used in the production of succinic acid, with a high degree of efficiency and without employing any complicated step. Disclosed is a process for producing a solution of fermentation-derived ammonium succinate, which comprises the following steps (1) to (5): (1) a crystallization/fermentation step for producing calcium succinate trihydrate by using a microorganism; (2) a transfer step for transferring/crystallizing calcium succinate trihydrate to calcium succinate monohydrate; (3) a crystal separation step for separating calcium succinate monohydrate; (4) a salt-substitution step for converting calcium succinate monohydrate separated in the proceeding step to an ammonium succinate solution; and (5) a solid/liquid separation step for removing a calcium carbonate precipitate from the ammonium succinate solution.