好氧预处理对沈阳市城市生物有机垃圾厌氧消化的影响

The impact of aerobic pretreatment on anaerobic digestion of bioorganic municipal waste of Shenyang

以沈阳市生物有机垃圾和秸秆(质量比10∶1)为原料,先对物料进行为期一周的好氧堆肥,然后进行50 d的中温(37℃)厌氧消化;为进行实验对照,未处理的原料直接进行厌氧消化。实验结果表明:消化初期,预处理物料的pH值高于未处理的物料;两者所产沼气的甲烷平均含量相同,均为65.2%(v/v);在厌氧消化的前30 d内,预处理物料的产气速度比未处理物料的产气速度快了近10%;两者的挥发性有机物生物降解率非常相似,预处理约为59.6%,未处理为60%。

With the BMW and the stalk （mass ratio of 10：1） of Shenyang as feedstock, first have one weeklong aerobic pretreatment, then 50 days long anaerobic digestion was carried out at 37 ℃, some feedstock was directly anaerobic digested for a better comparison. The results are showing that： at the beginning of anaerobic digestion process, the pH value of the aerobically pretreated material is higher than that of the nn-pretreated material; the pretreated and the un-pretreated material produces biogas with a similar methane content of 65.2% （v/v）; The specific biogas-production rate of pretreated material was about 10% clearly higher than that of the un-pretreated material during the first 30 days; the total VOC bio-degradation of both materials is quite similar, which are 59.6% for the pretreated and 60% for the un-pretreated feedstock.