建筑管道直饮水系统臭氧衰减模型及生产运行调控  

Ozone Attenuation Model and Operation Control of Building Pipeline Direct Drinking Water System

作　　者：柯水洲[1] 张春雨 欧阳林 陶策 陈佳 黎思云 KE Shui-zhou;ZHANG Chun-yu;OUYANG Lin;TAO Ce;CHEN Jia;LI Si-yun(School of Civil Engineering,Hunan University,Changsha 410082,China;Changsha Shuisiyuan Industrial Development Co.Ltd.,Changsha 410017,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]长沙水思源产业发展有限公司,湖南长沙410017

出　　处：《中国给水排水》2024年第15期9-15,共7页China Water & Wastewater

摘　　要：为优化臭氧消毒工艺和确保管道直饮水安全,以正在运行的管道直饮水系统作为研究基地,进行了臭氧浓度衰减静态和动态试验。在净水箱中臭氧浓度随时间的衰减符合二项式拟合曲线,半衰期约为30~45 min;当净水箱中臭氧初始浓度分别为0.06、0.12、0.18 mg/L时,静置120 min后臭氧残留浓度均在0.01 mg/L以上。净水箱中臭氧投加量分别为0.06、0.12、0.18 mg/L时,在不循环、不出水工况下,用水点的臭氧浓度先随时间增加而增加,一段时间后开始下降,150 min后均小于0.01 mg/L;在出水、不循环工况下,随着出水流量或臭氧投加量的增加,用水点的臭氧浓度降低到0.01 mg/L以下所需时间相应增加;开启循环后,出水流量越大或臭氧投加量越大,末端臭氧浓度达到0.01 mg/L所需时间越短。循环消毒制度优化试验表明,对菌落总数和铜绿假单胞菌检出的影响程度为臭氧投加量>每日循环次数>每次循环时间。当臭氧投加量达到0.13~0.18 mg/L、每日循环8次、每次循环15 min时,可以确保用水点检测到的铜绿假单胞菌数基本为0。In order to optimize the ozone disinfection process and ensure the safety of pipeline direct drinking water,the static and dynamic tests of ozone concentration attenuation were carried out.The results showed that the attenuation model of ozone concentration in clean water tank with time conformed to the binomial fitting curve,and the half-life was about 30-45 min.When the initial concentration of ozone in the clean water tank was 0.06 mg/L,0.12 mg/L and 0.18 mg/L respectively,the residual concentration of ozone was above 0.01 mg/L after standing for 120 min.When the ozone dosage in the clean water tank was 0.06 mg/L,0.12 mg/L and 0.18 mg/L respectively,the ozone concentration at the water point first increased with the increase of time under the condition of no circulation and no effluent,and began to decrease after a period of time,and was less than 0.01 mg/L after 150 min.Under the condition of effluent and non-circulation,with the increase of outflow or ozone dosage,the time required for the ozone concentration at the water point to decrease to below 0.01 mg/L increased correspondingly.After opening the cycle,the greater the outflow or the ozone dosage,the shorter the time required for the terminal ozone concentration to reach 0.01 mg/L.The optimization test of circulating disinfection system showed that the degree of influence on the total number of colonies and the detection of Pseudomonas aeruginosa was as follows:ozone dosage>number of daily cycles>time of each cycle.When the ozone dosage reached 0.13-0.18 mg/L,cycling 8 times a day and 15 min each cycle,the number of Pseudomonas aeruginosa detected at the water point could be basically ensured to be zero.

关 键 词：管道直饮水 臭氧衰减 铜绿假单胞菌 循环消毒 正交优化 

分 类 号：TU991[建筑科学—市政工程]