木炭对污泥堆肥有机质减量和腐熟度的影响

Impact of Wood Biochar on Organics Degradation and Maturity of Sewage Sludge

摘要:

以木炭为供试生物炭，分别添加污泥初始质量0，10%，20%和30%的木炭，通过元素分析和红外光谱技术，研究木炭促进污泥堆肥过程中碳减量和氮减量的效果.结果表明：随着木炭添加量的增加，污泥中碳的质量分数显著减少；堆肥结束时，相比未添加木炭工况，添加木炭工况的碳减量程度和氮减量程度分别提高了18.3%~27.8%和10.3%~17.2%；污泥堆肥的芳构化程度和稳定度相应提高，多糖、蛋白质类和脂肪类成分减少.

Abstract:

Elemental analysis method and Fourier transform infrared spectroscopy method were applied to the investigation of the effect of wood biochar on carbon loss and nitrogen loss of sewage sludge. Wood biochar was added on four levels, i.e., 0, 10%, 20%, and 30% of sewage sludge fresh weight. The results show that with the increasing of the wood biochar addition, the carbon content of sludge decreases significantly. Carbon loss is 18.3%~27.8% higher than the control. However, nitrogen loss is 10.3%~17.2% higher than the control. The reduction of polysaccharides, protein and aliphatic components, and a relative increase of aromatic components and compost maturity are proved by increasing wood biochar addition.