南方湖库型原水典型嗅味物质的臭氧/双氧水工艺去除特性研究
Study on the peroxone process removal characteristic of typical odors in Southern Lakes and Reservoirs Source Water
沈万峰 1陈琳 1郭世柏 1魏恒 1王昱锜 2郭驭 2王小(毛) 2刘书明2
作者信息
- 1. 宁波市水务环境集团有限公司,宁波 315046
- 2. 清华大学环境学院,北京 100084
- 折叠
摘要
以宁波某地实际原水为进水,对臭氧/双氧水(O3/H2O2)高级氧化技术去除原水中典型嗅味物质—2-甲基异莰醇(2-MIB)的必要性和可行性进行了中试研究.采用对氯苯甲酸作为2-MIB的替代化合物(·OH探针).运行参数包括O3投加量、H2O2/O3投加比、pH和反应时间等.结果表明,相比于仅臭氧投加条件,H2O2的催化作用能明显提高反应速率与去除率.在＞50 ng/L的较高浓度2-MIB的进水条件下,为达到出水要求(＜10 ng/L),需采用O3/H2O2高级氧化工艺代替仅臭氧氧化,且适宜的H2O2/O3投加比在20％左右.同时,适当提升原水pH也能优化处理效果,在一定程度上减少臭氧投加量.另外,在原水碱度、NOM不高且进水2-MIB浓度较低的情况下,仅通过臭氧氧化也可能实现达标要求.通过运行参数的优化,O3/H2O2工艺可稳定、高效地去除嗅味物质,6 min反应时间即可满足对2-MIB的去除要求.
Abstract
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.
关键词
臭氧/双氧水高级氧化/2-甲基异莰醇/嗅味/饮用水处理/运行参数Key words
Peroxone process/2-methylisobornyl/Odorous chemicals/Drinking water treat-ment/Operating parameters引用本文复制引用
出版年
2024
NETL
NSTL
万方数据