In the cleaner production of MSG,the four effect evaporation system was used to concentrate the glutamic acid isoelectric mother solution.

• 在味精清洁生产工艺中,利用四效蒸发技术来浓缩谷氨酸等电结晶母液,所得的蒸发凝结水因COD值稍高而不能直接排放。