高温堆肥中复合菌系对木质纤维素和林丹降解效果的研究

Degradation of Lignocellulose and Lindane in Microbial Composting System During Thermophilic Compost Process

通过在堆肥中加入经过驯化构建的降解纤维素和林丹的复合菌系,探讨了接菌处理对提高堆肥效率和有效去除有机污染物的可能性。结果表明,该复合菌系对纤维素、半纤维素和林丹的降解都有较为明显的促进作用,而木质素含量在整个堆肥过程中几乎不降解,复合菌系的接种也未对其产生明显影响。同时使可溶性糖和淀粉在堆肥初期的分解加速,使堆肥在60℃以上高温持续时间延长,从而有利于有机碳的分解,有效缩短了堆肥腐熟时间。

The domesticated and constructed composite microbial system of degrading lignocellulose and lindane were added to compost in order to test possibility of improvement for composting efficiency and elimination of organic pollutant. The results indicated that the composite microbial system could improve biodegradation of cellulose and hemicellulose significantly during high-temperaturecomposting period. In the inoculated compost, cellulose and hemicellulose were decomposed by 66.65%and 78.87%, respectively. However, the lignin could hardly be degraded, and the composite microbial system had little effects. The biodegradation of lindane also occurred mostly in the high temperature period, and the degradation ratio of lindane in the inoculated compost increased by 20.32%compared to the control. During the early 28 days the content of dissolved sugarcompost decreased by 95.60%, which was 24.9%more than the control. In addition, during early 14 days it was discovered that starch was decomposed significantly faster than the control. It was suggested that composite microbial system adapt compost environment rapidly and use dissolved sugar and the starch as carbon resource to proliferate at the initial stage of composting, so they could have enough quality and ability to degrade the lignocellulose and lindane during the period of high temperature. The test also showed that inoculating the composite microbial system could prolong the lasting time of above 60℃about ten days.So it could improve the decomposing of organic carbon and shortening time of composting.