以快速稳定厨余垃圾中有机物为目的,采用自升温好氧消化工艺对厨余垃圾的稳定化效果及其影响因素进行了研究。结果表明:自升温好氧消化体系中,最适厨余垃圾含固率为6%、曝气强度为200 mL air/(h·L)(以含固率为6%计)、搅拌强度为100...以快速稳定厨余垃圾中有机物为目的,采用自升温好氧消化工艺对厨余垃圾的稳定化效果及其影响因素进行了研究。结果表明:自升温好氧消化体系中,最适厨余垃圾含固率为6%、曝气强度为200 mL air/(h·L)(以含固率为6%计)、搅拌强度为100 r/min。在最适工艺参数条件下,厨余垃圾有机物能在14 d内实现快速稳定,20 d时挥发性有机物(VS)去除率高达66.2%。在稳定化处理过程中有机物代谢规律为:消化前期,高温溶胞作用使得细胞裂解后大量有机物进入上清液;消化中期,嗜热菌以溶解性化学需氧量(SCOD)为底物进行代谢,有机物被迅速分解;消化后期,体系中可利用有机物被基本分解完全,SCOD浓度趋于稳定。展开更多
Based on heat and mass transfer characteristics of spontaneous combustion of coal,Arrhenius equation and the Ranz-Marshall correlation,a novel approach was proposed in this paper to estimate oxygen consumption rate of...Based on heat and mass transfer characteristics of spontaneous combustion of coal,Arrhenius equation and the Ranz-Marshall correlation,a novel approach was proposed in this paper to estimate oxygen consumption rate of self-ignition of coal at high temperature.Compared with the conventional methods,this approach involves not only kinetic properties of self-ignition of coal and temperature,but also the ambient air flow characteristics and diameter of coal particle.To testify the proposed approach,oxygen consumption rates at high temperature were measured by the programmable isothermal oven experiments.Comparisons between experimental and theoretical results indicate that the rates of oxygen depletion calculated by the proposed approach agree well with those measured from laboratory-scale experiments,which further validates the proposed approach.展开更多
基金Project(51534008) supported by the National Natural Science Foundation of China
文摘Based on heat and mass transfer characteristics of spontaneous combustion of coal,Arrhenius equation and the Ranz-Marshall correlation,a novel approach was proposed in this paper to estimate oxygen consumption rate of self-ignition of coal at high temperature.Compared with the conventional methods,this approach involves not only kinetic properties of self-ignition of coal and temperature,but also the ambient air flow characteristics and diameter of coal particle.To testify the proposed approach,oxygen consumption rates at high temperature were measured by the programmable isothermal oven experiments.Comparisons between experimental and theoretical results indicate that the rates of oxygen depletion calculated by the proposed approach agree well with those measured from laboratory-scale experiments,which further validates the proposed approach.
