臭氧预氧化对饮用水处理作用的实验研究

目前,饮用水污染严重,常规工艺处理出现了水质不能达标的现象.本文主要研究在常规工艺增加预臭氧-活性炭过滤工艺,对不同的预臭氧投加量进行实验.结果表明:预臭氧投加量,对工艺各单元的处理效果有一定关系,随着投加量的增加,各单元对浊度、CODMn、UV254的去除呈现增大后趋于平缓甚至下降的趋势,而最佳臭氧的投加量为0.65 mg/L.为实际预臭氧-活性炭过滤工艺的运行提供指导.     

Pilot plant study on ozonation and biological activated carbon process for drinking water treatment

A study on advanced drinking water treatment was conducted in a pilot scale plant taking water from conventional treatment process. Ozonation-biological activated carbon process （O3-BAC） and granular activated carbon process （GAC） were evaluated based on the following parameters： CODMn, UV254, total organic carbon （TOC）, assimilable organic carbon （AOC） and biodegradable dissolved organic carbon （BDOC）. In this test, the average removal rates of CODMn, UV254 and TOC in O3-BAC were 18.2%, 9.0% and 10.2% higher on （AOC） than in GAC, respectively. Ozonation increased 19.3-57.6 μg Acetate-C/L in AOC-P17, 45.6-130.6 μg Acetate-C/L in AOC-NOX and 0.1-0.5 mg/L in BDOC with ozone doses of 2 8 mg/L. The optimum ozone dose for maximum AOC formation was 3 mgO3/L. BAC filtration was effective process to improve biostability.