复合微生物菌剂对城市污泥好氧堆肥的影响

Application of compound microbial inoculants in anaerobic composting of sewage sludge

通过接种复合微生物菌剂对城市污泥好氧堆肥过程进行试验,以污泥、蘑菇渣和废白土为原料,接种复合微生物菌剂比例分别为5‰、10‰和15‰,进行室外堆肥,对堆肥的温度、含水率、p H值、电导率(EC)、有机质、全氮、种子发芽率(GI)进行监测分析。结果表明:各堆体温度高于55℃均保持3 d以上,满足堆肥卫生学指标和堆肥腐熟的要求;种子发芽率均大于80%,说明堆肥对种子基本无毒;接种复合微生物菌剂不但能够加快升温速率、提高堆体温度最大值,而且还有利于加速堆体水分的散失,加快有机质的降解,降低堆体氮的损失,且有利于提高种子发芽率。

The application of compound microbial inoculants in the aerobic composting of municipal sludge was studied. Using municipal sludge,mushroom compost and waste clay as the raw materials,this paper monitored and analyzed compost temperature,moisture content,p H,electrical conductivity,organic matter,total nitrogen and seed germination rate. The results showed that each composte temperature higher than 55℃ remained above 3 days,meeting the requirements of hygiene index about the compost rotten. Seed germination rate was greater than 80%, nontoxic basically. Compared with the control group,the inoculum not only accelerated the heating rate,increased in the maximum temperature,but also increased the water loss,accelerated the rate of degradation of organic matter,reduced the loss of nitrogen,improved the seed germination rate.