Control of 2-Methylisoborneol and Geosmin by Ozone and Peroxone: A Pilot Study

Abstract

A pilot-scale study of ozone and PEROXONE (ozone in combination with hydrogen peroxide) for the removal of the odorous compounds 2-methylisoborneol (MIB) and geosmin in drinking water has been conducted at the Metropolitan Water District of Southern California. The study investigated the effects of ozone dosage, ratio of hydrogen peroxide to ozone (H202/03), and contact time. It was found that MIB and geosmin removal increased with higher applied ozone doses, but longer contact times over the range of 6-12 min were not significant. It was determined that 80-90 percent removal could be achieved with an ozone dose of approximately 4.0 mg/l, as compared to an ozone dose of approximately 2.0 mg/l at a H202/03 ratio of 0.2. Also investigated were the effects of alternative contactor configurations, ferrous sulfate as an alternative coagulant, bromide and ammonia addition, and simulated turbidity on the removal efficiencies of the two odorous compounds.

Controlling of geosmin and 2‐methylisoborneol induced off‐flavours in recirculating aquaculture system farmed fish—A review

“…For example, ozone dosages of 1, 2 and 4 mg/L with a contact time of 12 min. reduced an initial MIB concentration of 100 ng/L in river water by 58%, 65% and 75% respectively (Koch, Gramith, Dale, & Ferguson, ). According to other studies, 0.1 mg/L of ozone with a contact time of 20 min.…”

Identification of odor volatile compounds and deodorization of Paphia undulata enzymatic hydrolysate

“…According to their different physicochemical properties and generation pathways, three types of deodorization methods are commonly used: i) physical methods, which include adsorption (Kim et al, 2003) or extraction, masking (Serfert et al, 2010) and microcapsules (Kwak et al, 2003) are easy to perform because of their large output, low cost, simple operation and easy industrialization; ii) chemical methods, which include the Maillard reaction (Varlet et al, 2007), antioxidation and ozonation (Koch et al, 1992) are more effective than physical methods, but the chemical reaction alters the components; and iii) biological methods, primarily fermentation, although the mechanism is unclear, (Cho et al, 1991(Cho et al, , 2000Shinabe et al, 1995) and endogenous bacteria can also produce odor in aquatic products (Fukami et al, 2004b(Fukami et al, , 2004a.…”

Reservoir Eutrophication: Preventive Management: An applied example of Integrated Basin Management Interdisciplinary Research

“…Among the most common are the oxidation methods involving ozone and adsorption, based on the use of activated charcoal and biological processes (MEUNIER et al, 2006;ELLIS & KORTH, 1993;KOCH et al, 1992;LALEZARY-CRAIG et al, 1988;IZAGUIRRE et al, 1982). Among the most common are the oxidation methods involving ozone and adsorption, based on the use of activated charcoal and biological processes (MEUNIER et al, 2006;ELLIS & KORTH, 1993;KOCH et al, 1992;LALEZARY-CRAIG et al, 1988;IZAGUIRRE et al, 1982).…”

“…The combined use of ozone and hydrogen peroxide, the peroxon process, removed about 90% of 2-MIB and geosmin in up to 12 minutes (KOCH et al, 1992). Pilot studies showed an 80-90% degradation when peroxon (O 3 / H 2 O 2 ) was used (KOCH et al, 1992), while the heterogeneous photocatalysis using TiO 2 was able to completely degrade them after 60 minutes of treatment (LAWTON et al, 2003a).…”