【摘要】 为了减轻湿法纤维板生产废水对环境的严重污染 ,进行了利用其废水生产饲料酵母的研究。研究结果表明 ,纤维板废水的提取设备可采用碱法制浆生产中所用的双辊挤浆机或经改装后的水平带式真空洗浆机。经研究 ,转化最适合条件为 :硫酸浓度 0 .2 % ,温度 16 0℃ ,保温时间 10min。糖液发酵选用所筛选出的菌种热带假丝酵母CandidatropicalisAS 2 .56 5菌株。发酵基本参数为 :糖浓 1.0 % ,温度2 8～ 34℃ ,pH 4～ 4 .5。发酵结果显示酵母得率为 4 0 %～ 50 % ,达到工业生产一般水平 ,酵母蛋白质含量达到 50 % ,高于轻工部饲料酵母标准 (QB 596 80 )优级品指标。经测定废水BOD5消除率及CODcr消除率分别为 80 %和 70 % ,接近国际同类研究水平。更多还原

【Abstract】 In order to reduce the serious environmental pollution from fiberboard production by wet process,utilization of fiberboard wastewater for production of fodder yeast was studied.The research results showed that two roll press in the alkaline pulp production or modified horizontal belt filter could be used as extraction equipment,and revealed that the optimum conversion conditions were:sulfuric acid concentration 0.2?%,temperature 160?℃,retention time 10 min,A screened strain Candida tropicalis AS 2.565 was used for yeast fermentation.The basic fermentation parameters were:sugar concentration 1.0?%,temperature 28～33?℃,pH 4.0～4.5.Fermentation results showed that yeast yield was 40?%～50?%,reached the general level of industry production,and the protein content of yeast was 50?%, higher than the qualitative index of superior grade fodder yeast standard of Chinese Light Industry Ministry.The removals of BOD 5 and COD cr detected were 80?% and 70?% respectively,approximating to the international level of the same research.更多还原