论文部分内容阅读
通过对麦秸进行4种不同程度的粉碎,研究其对中温厌氧干发酵气肥联产效果的影响。结果表明:麦秸粉碎程度对前期产气量及产气高峰持续时间有一定影响。前期产气量最大的是粉末发酵组,其产气高峰比其他三组提前约5d,且产气峰值最高,该处理在发酵前后纤维素物质含量降低程度远远高于其他三组处理。粉末发酵物中有机质含量最低,全氮、速效磷含量与秸秆粉碎程度之间无明显对应关系,小粒度原料的速效钾含量明显高于大粒度原料,粉碎成1cm的麦秸在产气效果和纤维素类物质降解方面劣于粉末发酵组,但明显优于5cm和10cm的发酵组,后两者在各方面均无明显差异。综合考虑秸秆干发酵气肥联产效益最大化,1cm粒度的预处理粉碎程度比较适宜。
Wheat straw by four different degrees of crushing to study its effect on the temperature of anaerobic dry fermentation of gas fertilizer effect. The results showed that the degree of wheat straw pulverization had a certain impact on the amount of gas production and the peak duration of gas production. The highest gas production in the previous stage was in the powder fermentation group. The peak of gas production was about 5 days ahead of the other three groups and the peak of gas production was the highest. The content of cellulosic material before and after fermentation in this treatment was much lower than the other three treatments. The content of organic matter in the fermented powder was the lowest, while the content of total nitrogen and available phosphorus was not correlated with the degree of straw pulverization. The content of available potassium in the small-sized material was significantly higher than that of the large- In terms of biodegradation, the biodegradation was inferior to that of the powder fermenting group, but it was significantly better than that of the fermenting group of 5cm and 10cm. The latter two had no significant difference in all aspects. Taking into account the straw dry fermentation of the maximum benefit of cogeneration, 1cm particle size pretreatment grinding more appropriate.