SHENGQiang,TUHoude,LIUWei,et al.Light Pretreatment Enhancing the Efficiency of High?pressure Mechanical Dewatering of Sludge[J].China Water & Wastewater,2026,42(11):104-109.
光照预处理强化污泥高压机械脱水效能
- Title:
- Light Pretreatment Enhancing the Efficiency of High?pressure Mechanical Dewatering of Sludge
- Keywords:
- municipal sludge; moisture content; mechanical dewatering; light intensity; organic matter
- 摘要:
- 市政污泥快速增加给污泥处理带来了极大的挑战，单独的机械脱水无法实现深度脱水。基于此，提出在污泥机械脱水前对其进行光照预处理，并分析光照预处理与高压机械脱水的协同处理效果。结果表明，光照预处理可降低污泥中的有机质含量，提高污泥脱水性能，并能够提高污泥在机械脱水阶段的滤液流速。相比未经过光照预处理的污泥，当预处理阶段光照强度为750 W/m2时，污泥含水率降低6.22个百分点；当光照强度高于750 W/m2时，随着光照强度的增加，污泥含水率的变化趋于平缓。此外，通过分析污泥表面元素发现，污泥中大量的C元素为污泥光照预处理提供了良好的吸光效率。
- Abstract:
- The rapid growth of municipal sludge has posed tremendous challenges to sludge treatment, and mechanical dewatering alone cannot achieve deep dewatering. To address this issue, this study proposed subjecting the sludge to light pretreatment prior to mechanical dewatering, and analyzed the synergistic effect of combining light pretreatment with high-pressure mechanical dewatering. The results showed that light pretreatment could reduce the organic matter content in sludge, improve its dewaterability, and enhance the filtrate flow rate during the mechanical dewatering stage. Compared with sludge that had not undergone light pretreatment, when the light intensity during the pretreatment stage was set at 750 W/m2, the moisture content of the sludge decreased by 6.22 percentage points. When the light intensity exceeded 750 W/m2, the change in sludge moisture content tended to level off as the light intensity increased. Furthermore, analysis of the surface elements of the sludge revealed that the abundant carbon element in the sludge provided excellent light absorption efficiency for the light pretreatment process.
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