摘要
建立紫外消毒计算流体力学数值模拟技术(CFD)模型,用于模拟供水管网中水体和微生物群落的关系,通过计算该模型的UV剂量,并基于4种UV剂量(138.26、260.88、273.91 mJ/cm^2和471.64 mJ/cm^2)开展饮用水UV消毒试验,研究饮用水消毒前后主要水质指标TOC、AOC在不同UV剂量下的变化,评估饮用水的微生物风险。试验结果表明:UV消毒后出水AOC浓度随UV剂量的增加而增大;高UV剂量(471.61 mJ/cm^2)可分解水中的有机物,从而降低出水TOC;高UV剂量在降低TOC浓度的同时,将大分子有机物分解为小分子有机物,从而增大了AOC占TOC的相对比例。试验结果为后续饮用水安全消毒研究提供理论与技术支持。
The relationship between water bodies and microbial communities in water supply network was simulated by establishing a numerical simulation technique model for computational fluid dynamics(CFD).The UV disinfection test for drinking water was carried out by calculating UV dose of the model,based on four UV doses(138.26,260.88,273.91 mJ/cm^2 and 471.64 mJ/cm^2).The paper mainly introduced the changes of TOC and AOC at different UV doses before and after disinfection of drinking water,and evaluated microbiological risk of drinking water.The test results showed that the concentration of AOC in the effluent increased with the increase of UV dose after UV disinfection.The high UV dose(471.61 mJ/cm^2)could decompose organic matter in the water,thereby reducing the TOC of the effluent.Moreover,the high UV dose decomposed macromolecular organic matter into small molecular organic substances while decreasing TOC concentration,thereby causing an increase in the relative proportion of AOC to TOC.It provides theoretical and technical support for subsequent research on safe disinfection of drinking water.
作者
周娜
孙志民
卢静
ZHOU Na;SUN Zhimin;LU Jing(School of Environment and Safety Engineering,North University of China,Taiyuan 030000,China;Guangzhou Municipal Engineering Design&Research Institute,Guangzhou 510060,China)
出处
《净水技术》
CAS
2020年第3期28-35,81,共9页
Water Purification Technology
基金
国家自然基金青年基金:紫外光UVC灭活输水系统中沼蛤幼虫的机理研究(51608140)
国家自然基金面上项目:序批式固定载体生物膜与活性污泥耦合工艺剩余污泥减量及深度脱氮机理及调控研究(51778164)
国家自然基金面上项目:矿物-生物炭复合材料固定化融合细菌修复PAHs污染土壤机理研究(41977141)。
