摘要
[目的]更好地处理城市生活垃圾。[方法]采用大型隧道仓,对未分类收集的高含水率的城市生活垃圾进行强制通风的静态高温好氧堆肥试验,观察氧浓度、温度、耗氧速率、含水率等指标的变化。[结果]大体积物料含量≤50%(体积比)、含水率≥65%(WB)、堆高2m的原垃圾堆,静置沥水3d后通风,堆体中起始平均氧浓度≥17%,4d后温度达50℃以上,55℃以上的高温持续7d,满足卫生化要求,第10～25天耗氧速率都较高,最高达1%(ΔO2)/min;堆肥前期含水率略有上升,后期下降。物料发酵20d左右出仓,有机质含量350g/kg左右,含水率≤50%(WB),有利于后续机械筛分和二次发酵。氧浓度的较低区和耗氧速率较高时段及高温段都有极好的相关性。[结论]直接用隧道仓进行城市生活垃圾高温好氧发酵是可行的。
[Objective] The study aimed to dispose municipal domestic refuse better. [Method] The large-scale tunnel silo was used to conduct static high-temperature aerobic composting test with forcing ventilation on the municipal domestic refuse （high water content） collected without classification to observe the changes of indices such as oxygen concentration, temperature, consumption rate of oxygen and water content. [Result] The original refuse pile with plastic bags content less than or equal to 50 %（volume rate）, water content bigger than or equal to 65 %（WB） and pile height of 2 m was ventilated after static dewatering for 3 d. The initial average oxygen concentration in the compost was bigger than or equal to 17 %. The compost temperature was higher than 50 ℃ after 4 d and the high temperature over 55 ℃ continued for 7 d, which satisfied sanitating request. The consumption rates of oxygen in the 10th-25th d were higher and the highest rate reached 1% （△O2）/min. The water content increased a little in the prophase and decreased in the anaphase of compost. After fermentation for about 20 d, the material was exported from silo with organic matter content being about 350 g/kg and water content lower than or equal to 50 % （WB）, which was in favor of subsequent mechanic screening and the twice fermentation. The area with lower oxygen concentration had extremely good relativity with the period of time with higher consumption rate of oxygen and the period with high temperature. [Conclusion] Directly using tunnel silo to conduct aerobic fermentation with high temperature on municipal domestic refuse was feasible.
出处
《安徽农业科学》
CAS
北大核心
2008年第2期644-645,682,共3页
Journal of Anhui Agricultural Sciences
关键词
城市生活垃圾
隧道式
静态好氧堆肥
Municipal domestic refuse
Tunnel type
Static aerobic composting
