不同紫外光源对耐氯菌灭活特性研究  

Study on the inactivation characteristics of chlorine-resistant bacteria by different ultraviolet light sources

作　　者：吕炳琪 孙文俊[2,3] 刘础铭 张元娜 柯彦楚 王永磊 LYU Bingqi;SUN Wenjun;LIU Chuming;ZHANG Yuanna;KE Yanchu;WANG Yonglei(College of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan 250101,China;School of Environment,Tsinghua University,Beijing 100084,China;Tsinghua Suzhou Institute of Environmental Innovation,Suzhou 215009,China)

机构地区：[1]山东建筑大学市政与环境工程学院,济南250101 [2]清华大学环境学院,北京100084 [3]清华苏州环境创新研究院,苏州215009

出　　处：《给水排水》2024年第8期6-12,共7页Water & Wastewater Engineering

摘　　要：消毒是保障饮用水安全的重要环节,但不可避免会加剧耐氯性细菌的筛选和强化。与传统汞灯相比,紫外线发光二极管(UV-LED)和KrCl准分子灯作为灭活微生物的创新技术具有多项优势。以给水管网中筛选出来的假单胞菌和琼式不动杆菌2种致病性耐氯菌为研究对象,开展了不同紫外波段包括传统紫外灯LPUV(254 nm)、新兴UV-LEDs(265 nm、285 nm)和222 nm KrCl准分子灯对耐氯菌的灭活特性研究。研究结果表明:4种紫外波段对2种耐氯菌均具有较高的灭活效果,在较低的剂量内(8~10 mJ/cm^(2))2种菌灭活率达到2~5 log。2种耐氯菌从灭活率和灭活速率常数比较4种光源的灭活效果依次为:265 nm>254 nm>285 nm>222 nm,而2种菌对不同波段敏感度比较得出:265 nm>254 nm>222nm>285 nm,综合来说UV-LED 265 nm对2种耐氯菌灭活效果最佳。同时基于研究结果从耐氯菌处理效果和应用场景适配性等方面提出了对应的新兴紫外消毒技术工艺应用建议。Disinfection is an important part of ensuring the safety of drinking water,but it inevitably exacerbates the screening and strengthening of chlorine-resistant bacteria.Compared with traditional mercury lamps,ultraviolet light-emitting diodes(UV-LEDs)and KrCl excimer lamps as innovative technologies for inactivating microorganisms have multiple advantages.This study took two pathogenic chlorine-resistant bacteria,Pseudomonas and Acinetobacter,screened from the water supply network as the research objects,and conducted experimental studies on the inactivation characteristics of chlorine-resistant bacteria using different ultraviolet bands,including traditional ultraviolet lamp LPUV(254 nm),emerging UV-LEDs(265 nm,285 nm),and 222 nm KrCl excimer lamp.The results showed that all four ultraviolet bands had high inactivation effects on the two chlorine-resistant bacteria,with a 2~5 log inactivation rate at a low dose(8~10 mJ/cm^(2)).The inactivation effect of the four light sources on the two chlorine-resistant bacteria was ranked as follows:265 nm>254 nm>285 nm>222 nm,while the sensitivity of the two bacteria to different wavelengths was compared as follows:265 nm>254 nm>222nm>285 nm.In general,UV-LED 265 nm had the best inactivation effect on the two chlorine-resistant bacteria.Based on the research results,suggestions for the application of emerging ultraviolet disinfection technology processes were proposed from the aspects of treatment effect and applicability of chlorine-resistant bacteria.

关 键 词：耐氯菌 紫外消毒 灭活效果 UV-LED LPUV 

分 类 号：TU991[建筑科学—市政工程]