市政污泥处理处置技术经济性分析与评价

针对由污泥处理处置成本核算复杂导致的技术路线抉择困难的问题，从经济性角度对市政污泥土地、建材2类资源化利用路径典型技术路线进行评估，以帮助决策者权衡污泥处理处置全工艺链条的选择。通过生命周期成本评价方法评价了市政污泥处理处置典型技术路线，并利用敏感性分析方法对产业布局、土地利用季节性、建材产业生产波动与污泥处理处置成本的动态响应机制进行了探究。生命周期成本评价结果表明，土地利用路径生命周期成本为310~523元·t⁻¹，经济效益为100~255元·t⁻¹；建材利用的生命周期成本为123~238元·t⁻¹，经济效益为24~78元·t⁻¹。综合生命周期成本、经济效益以及绿色低碳原则，市政污泥处理处置路线应以土地利用为主、建材利用为辅。敏感性分析结果表明，在保证污泥处置含水率达标的前提下，降低污泥脱水率、缩短污水处理厂到污泥处理处置中心的运输距离有利于减少成本；好氧发酵-土地利用路线的污泥处置成本对污泥产品临时储存量的敏感度最高，超过30%，故有必要设置储存仓库以稳定成本波动。本研究结果可为市政污泥资源化利用路径选择、成本评估和产业布局优化有参考意义。

Economic analysis and evaluation of municipal sludge treatment and disposal technology

Aiming at the problem of difficult choice of technology routes due to the complexity of sludge treatment and disposal costing, different technology routes of municipal sludge land and building materials resource utilization paths are evaluated from an economic perspective, in order to help decision makers weigh the choice of different sludge treatment and disposal whole process chains. Typical technical routes for municipal sludge treatment and disposal were evaluated through the life cycle cost method, and the dynamic response mechanism of industrial layout, land use seasonality, production fluctuation of building materials industry and sludge treatment and disposal cost was explored by sensitivity analysis method. The results of the life cycle cost evaluation show that the life cycle cost of the land use route is 310 CNY·t−1~523 CNY·t−1, and the economic benefit is 100 CNY·t-1~255 CNY·t−1. The life cycle cost of the building material application is 123 CNY·t−1~238 CNY·t−1, and the economic benefit is 24 CNY·t−1~78 CNY·t−1. Comprehensive life-cycle cost, economic benefit and green low-carbon principle, the municipal sludge treatment and disposal route should be mainly land use and building material use. The results of sensitivity analysis show that, on the premise of ensuring the water content of sludge disposal to meet the standard, reducing the sludge dewatering rate and shortening the transportation distance from sewage treatment plant to sludge treatment and disposal center are beneficial to reduce the cost. The sludge disposal cost of the aerobic fermentation-land use project has the highest sensitivity of over 30% to the temporary storage volume of sludge products, making it necessary to set up storage warehouses to stabilize the cost fluctuation. The study has reference significance for optimizing the path of municipal sludge resource utilization and industrial layout.