학술논문
城市供水系统中真菌群落赋存规律解析 / Analysis of fungal community characteristics in urban drinking water supplying system
Document Type
Academic Journal
Author
赵恒轩; 王圣; 张天阳; 朱斌; 何欢; 陆建; 徐斌; ZHAO Hengxuan; WANG Sheng; ZHANG Tianyang; ZHU Bin; HE Huan; LU Jian; XU Bin
Source
给水排水 / Water & Wastewater Engineering. 49(12):14-20
Subject
Language
Chinese
ISSN
1002-8471
Abstract
城市供水系统中的耐氯真菌为面向直饮的高品质饮用水供应带来了新的挑战.以某城市供水系统为研究对象,借助培养法、宏基因组测序等方法对水厂不同处理工艺出水和二次供水中真菌的数量和群落结构进行了测定分析.经过水厂净水工艺处理,真菌菌落数有效降低;但相比出厂水,二次供水水箱中的真菌数量出现上升,表明存在真菌再生长风险.出厂水和二次供水中的真菌以根瘤菌属、壶菌属、曲霉属和镰刀菌属为主.曲霉是两水厂出厂水中检出频率和相对丰度最高的致病真菌,3月份最高丰度可达25.19％,建议应作为供水系统重点控制的对象.紫外装置对二次供水中耐氯真菌的数量和致病真菌丰度具有明显的控制效果.
Chlorine-resistant fungi in urban drinking water supplying systems(DWSSs)repre-sents an emerging challenge for high-quality drinking water supply for direct consumption.In this study,the number and community structure of fungi in different processes in drinking water treat-ment plants and a secondary water supply system were measured and analyzed using cultivation and metagenomic sequencing methods.The fungal colony number can be efficiently reduced by differ-ent processes in drinking water treatment plant.However,compared with finished water,fungal number in secondary water supplying facility increased apparently,indicating an increasing risk of fungal regrowth.Fungi in finished water and secondary water supply system mainly belong to gen-era of Rhizopus,Batrachochytrium,Aspergillus,and Fusarium.Aspergillus dominated the most frequently detected pathogenetic fungi in the finished water of two treatment plants,with the highest abundance up to 25.19％in March,thus should be regarded as the key control targets of DWSSs.The fungal number and relative abundance of pathogenetic fungi in secondary water suppl-ying facility were significantly controlled by ultraviolet treatment.
Chlorine-resistant fungi in urban drinking water supplying systems(DWSSs)repre-sents an emerging challenge for high-quality drinking water supply for direct consumption.In this study,the number and community structure of fungi in different processes in drinking water treat-ment plants and a secondary water supply system were measured and analyzed using cultivation and metagenomic sequencing methods.The fungal colony number can be efficiently reduced by differ-ent processes in drinking water treatment plant.However,compared with finished water,fungal number in secondary water supplying facility increased apparently,indicating an increasing risk of fungal regrowth.Fungi in finished water and secondary water supply system mainly belong to gen-era of Rhizopus,Batrachochytrium,Aspergillus,and Fusarium.Aspergillus dominated the most frequently detected pathogenetic fungi in the finished water of two treatment plants,with the highest abundance up to 25.19％in March,thus should be regarded as the key control targets of DWSSs.The fungal number and relative abundance of pathogenetic fungi in secondary water suppl-ying facility were significantly controlled by ultraviolet treatment.