臭氧投加量对臭氧／生物活性炭工艺处理水库水影响的中试  

Pilot-Scale Study on the Impact of Ozone Dosage on O_3/BAC Process for Advanced Treatment Reservoir Water

作　　者：邬晓东[1,2] 周北海[1,2] 袁蓉芳[1,2] 张磊 顾军农 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083 [2]北京科技大学土木与环境工程学院环境工程系,北京100083 [3]北京市自来水集团水质监测中心,北京100085

出　　处：《环境科学研究》2014年第4期427-433,共7页Research of Environmental Sciences

基　　金：国家自然科学基金项目(51178043)

摘　　要：臭氧投加量是O3/BAC(臭氧/生物活性炭)工艺中的重要参数,直接影响净水效果和处理费用.试验分别采用预臭氧+常规工艺+生物活性炭工艺(下称工艺Ⅰ)和常规工艺+主臭氧+生物活性炭工艺(下称工艺Ⅱ),以CODMn和浊度的去除率、UV254降幅为评价指标,确定了O3/BAC工艺中最佳预臭氧投加量和最佳主臭氧投加量,并分别对比了臭氧投加前后工艺Ⅰ和工艺Ⅱ对污染物的去除效果.结果表明:工艺Ⅰ中,最佳预臭氧投加量为0.78 mg/L,该预臭氧投加量下CODMn去除率和UV254降幅分别较无预臭氧工艺提高28.8%和43.7%;工艺Ⅱ中,最佳主臭氧投加量为1.20 mg/L,该主臭氧投加量下CODMn去除率和UV254降幅分别较无主臭氧工艺提高44.8%和73.3%.可见,在合适的臭氧投加量下,O3/BAC工艺能够高效去除丹江口水库水中的有机污染物,使水质得到显著改善,投加主臭氧的工艺Ⅱ对污染物的去除效果比投加预臭氧的工艺Ⅰ更好.As an important parameter of 03/BAC, ozone dosage directly affects the purification effect of water and operation costs. The optimal pre-ozone dosage and optimal post-ozone dosage were determined based on the removal efficiency of general pollution indices （e. g. , CODMn, UV254 and turbidity） in ozone-activated carbon, which are pre-ozone/BAC （process I ） and post-ozone/BAC （process I1 ）. The study also compared the removal efficiency of organic pollutants, before and after ozonation, in the process I and process II. The results showed that the optimal pre-ozone dosage was 0. 78 mg/L in process [ , while the removal efficiencies of CODMn and UV254 at the optimal pre-ozone dosage were 28.9% , 43.7% respectively higher than those at zero; the optimal post-ozone dosage was 1.20mg/L in process lI , and the removal efficiencies of CODHn and UV254 at the optimal post-ozone dosage were 44. 8% and 73.7% respectively higher than those at zero. It could be seen that, when 03/BAC process was used for Danjiangkou Reservoir water advanced treatment, it could effectively remove the organics and comprehensively improve the water quality in the optimal ozone dosage. Moreover, the treatment capacity of process IX was better than that of process I after the water treatment for the Danjiangkou Reservoir.

关 键 词：臭氧 生物活性炭 预臭氧 主臭氧 臭氧投加量 丹江口水库 

分 类 号：X524[环境科学与工程—环境工程]