味精废水的微生物转化与效益

谷氨酸发酵液经冷冻等电一离交排出的废水，无论是经除菌体回收蛋白，还是未经除菌体排出的味精废水，都含有丰富的有机、无机营养物，可被微生物利用、转化为菌体蛋白。在废水ＣＯＤＣｒ含量约为３５０００ｍｇ／Ｌ的情况下，可制取干菌体约１８ｇ／Ｌ，废水中ＣＯＤＣｒ去除率可达６５％以上，出水ＣＯＤＣｒ降至１００００ｍｇ／Ｌ左右。且饲料酵母生产成本约３０００元／ｔ。因此具有较好的经济效益、环境效益和社会效益。

Microorganism Decomposition of Pollution in Monosodium Glutamate Waste Liquid and Its Benefits

The monosodium glutamate waste liquid from the process of monosodium glutamate production by isoeletric point precipitation and positive ion exchange methods, which excludes/includes the monosodium glutamate cells,contains abundant organic and inorganic substances which can be used as the nutrients to produce feeding yeast. If the content of CODcr is about 35000 mg/L in monosodiun glutamate wastewater,the average yield of dried yeast is 18 g/L. The eliminating rate of CODcr in the liquid can reach more than 65 % and CODcr in the effluent is about 10000mg/L. The production cost of feeding yeast is about 3000 Yuan/ton. Therefore the economic, environmental and social effects of the process are well.