A methodological procedure, based on results from batch experiments, is proposed and applied to a selected wastewater treatment plant generating a poorly degradable sludge, to identify the best configuration and ozone dosage for full-scale application of sludge ozonation. Samples of pre-thickened and digested sludge were collected, tested at different ozone dosages and characterized to gather useful data for energy, economic and carbon footprint balances. The most viable scenario was found to be sludge pre-treatment at the lowest tested dosage (20 mg O₃/g VS), yielding energy, cost and GHG emission net savings of 177 MWh/y, 57.8 k€/y and 6.38 Mg CO₂-eq_./y, respectively. Sensitivity analyses, conducted by varying the specific energy required for ozone generation and the unit costs for sludge disposal and resource supply, confirmed the stability of this scenario, whereas a field pilot-scale testing is advisable to verify modified process conditions for a safe and efficient application of sludge ozonation. The proposed methodology, including laboratory batch anaerobic digestion tests, scenario definition and energy/economic/environmental balances, could be preliminary applicable to all situations to broadly analyze all involved aspects and give a useful overview about the effective applicability of sludge ozonation.

提出了一种基于批量实验结果的方法程序，并将其应用于产生难降解污泥的选定废水处理厂，以确定全面应用污泥臭氧化的最佳配置和臭氧剂量。收集预先浓缩和消化的污泥样品，在不同的臭氧剂量下进行测试，并对其进行表征，以收集能源、经济和碳足迹平衡的有用数据。_{发现最可行的方案是以最低测试剂量（20 mg O 3} /g VS）进行污泥预处理，产生的能量、成本和温室气体排放净节省 177 MWh/y、57.8 k€/y 和 6.38 Mg CO ₂ -当量_。/y，分别。通过改变臭氧生成所需的比能量以及污泥处理和资源供应的单位成本进行的敏感性分析证实了这种情况的稳定性，而建议进行现场中试规模测试以验证修改后的工艺条件以实现安全和高效污泥臭氧化的应用。所提出的方法，包括实验室批量厌氧消化测试、场景定义和能源/经济/环境平衡，可以初步适用于所有情况，以广泛分析所有相关方面，并对污泥臭氧化的有效适用性提供有用的概述。