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

某些蓝细菌和放线菌物种的代谢产物，例如土臭素和2-甲基异冰片醇（MIB），通常是地表水中的泥土和霉味的来源。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的系统中，都研究了用过氧化物处理工艺去除MIB的方法。使用2 mg / LO ₃剂量的不同H ₂ O ₂：O ₃比值来确定MIB去除的H ₂ O ₂：O ₃最佳比例。最佳H ₂实验室系统中的O ₂：O ₃比和接触时间分别确定为0.3和5分钟，而中试系统分别为0.5和15分钟。尽管两个系统的性能在相似的运行条件下都不同，但在特定于实验室和中试规模的最佳条件下，MIB去除效率可达到80％以上。