温度对堆肥孔隙比渗透性以及可压缩性的影响

Effects of Temperature on the Structure of a Compost Bed-Compress,Porosity and Permeability

以猪粪及庭园垃圾为材料,在一种可测定堆肥物理结构参数的装置上,研究了温度对堆肥物料可压缩比、孔隙比以及渗透性的影响。结果表明,温度由20℃升到60℃,堆肥物料弹性模数(β)由3.08×10-4上升到8.01×10-4m2·N-1,因而影响堆体的可压缩比、孔隙比以及渗透性等物理结构参数,这种影响随堆肥物料的不同而异,因此,在进行堆肥高度设计时,应充分考虑温度可能对堆体物理结构参数的影响,使堆肥设计更科学合理。

An exp er iment was carried out to stu dy the effects of temperature on the s tructure of a compost bed,including compress,porosity and permeability,which we re measur ed with an experimental apparatus.Green waste and pig manure wi th different ra tios were used as the feedstock of compost.The results indicated that high tem perature made materials more plasti c and susceptible to compaction.The permeab ility decre ased with temperature increase since the change of the particle shap e factors.When temperature increased from 20℃to 60℃,the modulu s of elas ticity rose from 3.08×10-4 to 8.01×10-4 m 2 ·N-1 ,which influenced the compress,porosity and permeability of compost bed an d these effects varied with the ratio of green waste to pi g manure.It was sugg ested that the influence of the t emperature on the physical structur e of feeds tock must be considered in d etermining a maximum pile height for higher quality and effective compost.