XIEXiong,BAIGuo,WUMingdong,et al.Application of Incineration Technology in Waste Gas Treatment from Sludge Thermal Hydrolysis Process[J].China Water & Wastewater,2026,42(8):113-119.
焚烧技术在污泥水热废气处理领域的应用实例
- Title:
- Application of Incineration Technology in Waste Gas Treatment from Sludge Thermal Hydrolysis Process
- Keywords:
- wastewater treatment plant; waste gas from sludge thermal hydrolysis process; natural gas; auxiliary combustion; alkali washing; biofilter; deep desulfurization
- 摘要:
- 针对污泥水热废气中硫化物浓度高（H2S>5 000 mg/m3）、恶臭组分复杂（含甲硫醇等有机硫化合物）导致传统生物滤池频繁失活的问题，通过在新疆某污泥处理项目开展应用实践，提出“低氧燃烧+急冷+两级碱洗+生物滤池”四级耦合废气处理工艺。该工艺引入天然气辅助燃烧技术，解决了污泥水热废气热值低（5.693 MJ/m3）无法自持燃烧的问题，并结合碱洗与生物滤池实现硫化物深度脱除。实践表明，系统处理效率显著提升，硫化氢、甲硫醇等关键污染物排放浓度低于《恶臭污染物排放标准》（GB 14554—93）限值的5%，臭气浓度由初始6.9×107降至1.7×103。经济分析显示，污泥处理仅需天然气0.54 m?/t，综合成本较传统方法降低66%。
- Abstract:
- The high concentration of sulfides in the waste gas produced by sludge thermal hydrolysis (H2S >5 000 mg/m3) and the complex components of odorous substances (including organic sulfur compounds such as methanethiol) have led to the frequent deactivation technical problem of traditional biofilters. Through the application experiment in a sludge treatment project in Xinjiang, an innovative four-stage waste gas treatment process of “low-oxygen combustion + rapid cooling + two-stage alkali washing + biofilter” was proposed. This process introduces natural gas-assisted combustion technology to solve the problem that the low calorific value of thermal hydrolysis waste gas (5.693 MJ/m3) cannot sustain combustion on its own, and combines alkali washing with biofilters to achieve deep desulfurization. Practice shows that the system’s treatment efficiency has been significantly improved, and the emission concentrations of key pollutants such as hydrogen sulfide and methanethiol are lower than 5% of the limit values of the Odorous Pollutant Emission Standards (GB 14554-93), and the odor concentration has dropped from the initial value of 6.9×107 to 1.7×103(dimensionless). Economic analysis shows that only 0.54 m3/t of natural gas is required for sludge treatment, and the comprehensive cost is 66% lower than the traditional method.
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