奶牛粪沼气发酵条件的初步研究

The Initial study on the Anaerobic Fermentation Conditions for Cow Manure

采用Ｌ９（３４）正交试验法，对影响奶牛粪沼气发酵的基质浓度、ｐＨ值、接种量和添加人粪尿等诸因素间的相互关系进行了初步研究。结果表明，在自然温度条件下，解决好奶牛粪沼气发酵问题的关键在于控制好基质浓度和ｐＨ值。从中优化出最佳的奶牛粪沼气发酵的适宜条件：基质浓度１０％左右，接种量以１５％～２０％为佳，ｐＨ值应严格控制在中性偏微碱性范围（７．０～７．４），人粪尿添加量宜小于１５％，原料配比以Ｃ：Ｎ为２０～２５：１为宜。

The initial study was conducted on the mutual relationship of the factors as substrate concentra-tion, pH value,seeding material amount and the addition of human excreta etc. by menas of the L9(34)orthorhombic experi-mental method. It is shown from the study result that under the condition of ambient temperature, arell-control Of the sub-strate concentration and pH value are the key to solve the problem of anaerobic fernientation of cow manure. The proper con-ditions for anaerobic fermentation of cow manure have hen optimized: with about 10%of substrate concenttation, 10%-20%of the seeding matetial amount, pH value strictly controlled at the range of partlally deviatetl alkali (pH value at 7.0-7.4), the addition of human excreta amount of less than 15%,and the C :N ratio of fermenting material at 20-25:1as well.