Patent ID: 9562242
Date: 2017-02-07
CPC Classifications: C07C,C12P

Claim:
1. A method of cyclic utilization of water from a succinic acid production process, comprising step (a) which is recovering separately an amount of evaporated water and an amount of steam condensate from said succinic acid production process, step (b) which is using said evaporated water to prepare a first culture medium and conducting aerobic cultivation of seed in said first culture medium and step (c) which is using said steam condensate to prepare a second culture medium and conducting anaerobic fermentation in said second culture medium, said step (a) comprising a step of collecting an amount of fermentation liquor after anaerobic fermentation in said succinic acid production process, a step of treating said fermentation liquor in which said fermentation liquor is subject to pre-filtering, ultrafiltration under an acidic condition, nano-filtration under an acidic condition, and repeating of nano-filtration under a neutral condition, and a step of vacuum evaporation and concentration of said treated fermentation liquor to obtain succinic acid, evaporated water and steam condensate.