ABSTRACT

Metabolites of some cyanobacteria and actinomycete species such as geosmin and 2-methylisoborneol (MIB) are generally the sources of earthy and musty odor in surface waters. Peroxone process, that is a combination of ozone (O₃) and hydrogen peroxide (H₂O₂), has the potential to effectively remove these compounds. In this study, the removal of MIB with the peroxone process was investigated at both laboratory- and pilot-scale systems. Different H₂O₂:O₃ ratios with 2 mg/L O₃ dosage were applied for determining the optimum ratio of H₂O₂:O₃ for MIB removal. The optimum H₂O₂:O₃ ratio and contact time in the laboratory system were determined as 0.3 and 5 min, respectively, whereas they were 0.5 and 15 min for the pilot system, respectively. Although the performances of both systems were different at similar operating conditions, MIB removal efficiencies over 80% were achieved at the optimum conditions specific to laboratory and pilot scale.

摘要

一些蓝藻和放线菌的代谢物，如土臭素和 2-甲基异冰片 (MIB)，通常是地表水中泥土和霉味的来源。Peroxone 工艺，即臭氧 (O ₃ ) 和过氧化氢 (H ₂ O ₂ ) 的组合，具有有效去除这些化合物的潜力。在这项研究中，在实验室和中试规模系统中研究了用过氧酮工艺去除 MIB。应用具有2mg/LO ₃剂量的不同H ₂ O ₂ :O ₃比率来确定用于去除MIB的H ₂ O ₂ :O ₃的最佳比率。最佳 H ₂实验室系统中的O ₂ :O ₃比率和接触时间分别确定为 0.3 和 5 分钟，而中试系统的分别为 0.5 和 15 分钟。尽管两种系统在类似操作条件下的性能不同，但在实验室和中试规模特定的最佳条件下实现了超过 80% 的 MIB 去除效率。