堆肥通风技术及进展

基于堆肥通风技术在堆肥过程中的重要性,文章系统综述了堆肥的通风方式、通风控制方式、通风速率等方面的国内外研究进展。被动通风方式适于我国农业废弃物的堆肥处理,城市有机垃圾堆肥选择强制通风反应器堆肥系统较为适合。通风控制方式的目的是优化堆肥过程,提高堆肥质量。时间通风控制方式和时间-温度联合通风控制方式得到了最为广泛的应用。通风速率直接关系到堆肥的运行能耗,但由于堆料成分不同和通风设计方法不同,堆肥系统所需的通风量或通风速率差异很大,这造成实践中堆肥系统的能耗差异较大。此外,论述了通风对堆体温度和堆肥中氮磷变化的影响。不同通风方式的堆体温度差异较大,通风会影响堆肥过程的氮、磷转化。

Progress on Technology of Aeration in Composting

Based on importance of aeration in composting process,the progress on aeration in composting including aeration mode,aeration control mode and aeration rate was reviewed. The passive aeration mode was feasibly applied for agricultural waste composting while forced aeration was the option for municipal solid waste composting. Aiming at optimizing composting process and improving composting quality,two aeration control modes including time control and time-temperature feedback were widely used in composting. Aeration rate was the key factor of energy consumption of composting,and energy consumption of composting with various kinds of waste showed big difference due to complex characteristics of waste and different aeration design methods. In addition,impacts of aeration on pile temperature and nutrients transformation were discussed,and there was a big difference of pile temperature with different aeration mode. The aeration will affect nutrient transformation.