Semisolid fermentation of ryegrass straw to increase its animal feed value was successfully performed on a pilot scale. The pilot plant, which could handle 100 kg of straw per batch, was designed so that all major operations could take place in one vessel. The straw was hydrolyzed at 121 degrees C for 30 min with 0.5 N H2SO4 (7:3 liquid:solid), treated with ammonia to raise the pH to 5.0, inoculated with Candida utilis, and fermented in a semisolid state (70% moisture). During fermentation the straw was held stationary with air blown up through it. Batch fermentation times were 12 to 29 h. Semisolid fermentation did not require agitation and supported abundant growth at 20 to 40 degrees C even at near zero oxygen tensions. Fermentation increased the protein content, crude fat content, and in vitro rumen digestibility of the straw.
展开▼
机译：在试验规模上成功进行了黑麦草秸秆的半固态发酵，以提高其动物饲料价值。试点工厂的设计能够每批处理100公斤秸秆，因此所有主要操作都可以在一艘船上进行。用0.5 N H2SO4（7：3液体：固体）在121摄氏度下将秸秆水解30分钟，用氨水处理以将pH值提高到5.0，然后用util假丝酵母（Candida utilis）接种，并以半固态（70％水分）发酵。 。发酵过程中，秸秆保持静止不动，空气吹入秸秆。分批发酵时间为12至29小时。半固体发酵不需要搅拌，即使在接近零的氧气压力下也能在20至40摄氏度下保持充足的生长。发酵增加了稻草的蛋白质含量，粗脂肪含量和体外瘤胃消化率。
展开▼
