Study on the peroxone process removal characteristic of typical odors in Southern Lakes and Reservoirs Source Water
In this pilot study,the necessity and feasibility of the prepositive peroxone process for the removal of 2-methylisobornyl(2-MIB),a typical odorous chemicals,was studied using raw water as feed water in a site in Ningbo,China.P-chlorobenzoic acid was used as a replacement compound(·OH probe)for 2-MIB.The operating parameters included O3 dosage,H2O2/O3 dos-age ratio,pH and reaction time.The results showed that the catalytic effect of H2O2 significantly increased the reaction rate and removal rate compared with the ozone-only dosing condition.Under the condition of high concentration of 2-MIB(＞50 ng/L),in order to meet the requirement of out-let(＜10 ng/L),the peroxone process instead of ozone-only oxidation should be adopted,and the appropriate ratio of H2O2/O3 dosage should be around 20％.At the same time,appropriate in-crease of feed water pH can also optimize the treatment effect,to a certain extent,to reduce the o-zone dosage.In addition,in the case of alkalinity and NOM is not high and the concentration of 2-MIB in the feed water is low,only through the ozone oxidation may also achieve requirements.Through the optimization of the operating parameters,the O3/H2O2 process can remove the odor-ous chemicals stably and efficiently,and the 6 min reaction time can satisfy the removal require-ment of 2-MIB.
Peroxone process2-methylisobornylOdorous chemicalsDrinking water treat-mentOperating parameters
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