利用酵母菌处理高浓度味精废水的连续小试

利用批量实验对从高浓度味精废水中筛选出的一组酵母菌混合菌群进行了脱氢酶活性(DHA)测试.结果表明用该菌群对COD、硫酸根和氨氮均接近20000mg/L的味精离交尾液进行处理时,其DHA值在前36h高于对离交尾液稀释液的处理,说明高浓度氨氮和硫酸盐对酵母菌活性的影响不显著.利用接种了该酵母菌群的生物接触氧化反应器对味精废水进行的连续小试处理结果表明,COD容积负荷2.0～14.3kg/(m³·d)时,COD去除率稳定在80%以上;适当地补充磷源有利于维持稳定的处理效果对出水pH值和C

Laboratory-Scale Continuous Treatment of Monosodium Glutamate Manufacturing Wastewater Using Yeast

Dehydrogenation activity(DHA), test indicated that mixed yeast strains isolated from high strength monosodium glutamate wastewater could endure the high concentrations of COD, SO4(2-), and NH4+ containing in glutamate wastewater. The mixed yeast strains were inoculated to a biological contact oxidation reactor, and the reactor was used to treat the glutamate wastewater. Under a COD load ranging from 2.0 to 14.3 kg/(m3.d), the COD removal rate was over 80%. On the other hand, supplementation of phosphorus was necessary to maintain a stable COD removal performance. Variation of effluent pH seemed to have no apparent influence on COD removal rate. The optimum pH for the growth of yeast, however, was found to be in the range of 3.5-5.0. The effluent wastewater contained high concentration of yeast bodies, which could be utilized as a forage additive because of its high protein content (57.9%) and well-balanced amino acid distribution.