O_3/BAC工艺中炭滤池pH值调节技术的研究  

Control Measures of Effluent pH Value of Carbon Filter in O_3/BAC Process

作　　者：李芳[1] 陆少鸣[1] 林县平[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广东广州510006

出　　处：《中国给水排水》2013年第17期44-46,50,共4页China Water & Wastewater

摘　　要：针对采用O3/BAC工艺的某自来水厂中炭滤池出水pH值大幅度降低的现象,根据炭滤池pH值变化的关键因素对其调节技术进行了研究,开发出了活性炭滤料原位酸碱改性技术,并从净水效果和经济性两方面对砂滤池前投加烧碱或石灰进行了对比研究。结果表明:先对活性炭进行烧碱浸泡改性,使其pH值平衡点提高至所需值,再在砂滤池前投加石灰调节待滤水pH值至该平衡点左右,经过炭滤池酸碱缓冲后出水pH值维持在该平衡点处,达到了调节pH值的效果,出水COD Mn、NH3-N、浊度等指标均能达标,且水质硬度从90.7 mg/L增加到了178.4 mg/L,对防止给水管网腐蚀有利。Significant reduction of effluent pH value of carbon filter in waterworks using the 03/ BAC process is a common problem in southern China. Key factors of change in activated carbon filter pH were examined to find control measures. The in situ acid and alkali modification technology of activated carbon was developed, and a comparative research on the water treatment effect and the operation cost af- ter adding sodium hydroxide or lime in sand filter was conducted. The results showed that the first activa- ted carbon was modified by soaking in sodium hydroxide solution, raising pH value to a required level. Then the influent pH value was controlled to the equilibrium point by dosing lime in sand filter, and the effluent pH value was maintained at the equilibrium point by acid and alkali buffering in carbon filter. The effluent CODM., NH3 - N and turbidity all met the water quality standards, and the hardness in- creased from 90.7 mg/L to 178.4 mg/L, which was beneficial to preventing pipeline corrosion.

关 键 词：O3 BAC工艺 PH值 活性炭 改性 

分 类 号：TU991.24[建筑科学—市政工程]