Considerable declines in odor in a drinking water reservoir: Variations of odorous community, precursor enzymes abundance, distribution, and environmental dominant factors

IF 11.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2024-11-08 DOI:10.1016/j.watres.2024.122767

Honghong Guo , Rong Li , Shuhong Xue , Xuanzi Zhangsun , Daojun Huang , Yongchao Li , Na Li , Yuhang Su , Haihan Zhang , Tinglin Huang

{"title":"Considerable declines in odor in a drinking water reservoir: Variations of odorous community, precursor enzymes abundance, distribution, and environmental dominant factors","authors":"Honghong Guo , Rong Li , Shuhong Xue , Xuanzi Zhangsun , Daojun Huang , Yongchao Li , Na Li , Yuhang Su , Haihan Zhang , Tinglin Huang","doi":"10.1016/j.watres.2024.122767","DOIUrl":null,"url":null,"abstract":"<div><div>The presence of 2-methylisoborneol (2-MIB) is acknowledged as a prevalent source of odor-related challenges in drinking water reservoirs. Among the three in situ experiments conducted in drinking water reservoir, the water-lifting aerator with bio-filling system exhibited the most pronounced overall effects. It achieved a remarkable 98.70 % removal of 2-MIB and a 99.30 % reduction in the abundance of the <em>mic</em> gene. Metagenomic sequencing identified key genes including methyl transferase gene (<em>mtf</em>), 2-MIB cyclase gene (<em>mic</em>), cyclic nucleotide-binding protein gene (<em>cnb</em>), underscoring the potential role of Actinobacteria, Cyanobacteria, and Proteobacteria communities in contributing to odor occurrences in the reservoir. Furthermore, the abundance of odorous precursor enzymes in the MVA pathway and MEP/DOXP pathway were inhibited in the systems with bio-filling. Total nitrogen (TN) and nitrate (NO<sub>3</sub><sup>−</sup>-N) were identified as pivotal factors influencing the presence of 2-MIB odor-producing microorganisms. Effective management of odor-producing species in reservoir water was closely related to the efficient removal of pollutants. These findings will provide valuable insights for the development of odor removal techniques in reservoirs and offer researchers deeper understanding into the mechanisms underlying odor processes.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"268 ","pages":"Article 122767"},"PeriodicalIF":11.4000,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water Research","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S004313542401666X","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}

引用次数: 0

Abstract

The presence of 2-methylisoborneol (2-MIB) is acknowledged as a prevalent source of odor-related challenges in drinking water reservoirs. Among the three in situ experiments conducted in drinking water reservoir, the water-lifting aerator with bio-filling system exhibited the most pronounced overall effects. It achieved a remarkable 98.70 % removal of 2-MIB and a 99.30 % reduction in the abundance of the mic gene. Metagenomic sequencing identified key genes including methyl transferase gene (mtf), 2-MIB cyclase gene (mic), cyclic nucleotide-binding protein gene (cnb), underscoring the potential role of Actinobacteria, Cyanobacteria, and Proteobacteria communities in contributing to odor occurrences in the reservoir. Furthermore, the abundance of odorous precursor enzymes in the MVA pathway and MEP/DOXP pathway were inhibited in the systems with bio-filling. Total nitrogen (TN) and nitrate (NO₃⁻-N) were identified as pivotal factors influencing the presence of 2-MIB odor-producing microorganisms. Effective management of odor-producing species in reservoir water was closely related to the efficient removal of pollutants. These findings will provide valuable insights for the development of odor removal techniques in reservoirs and offer researchers deeper understanding into the mechanisms underlying odor processes.

Abstract Image

查看原文本刊更多论文

饮用水水库臭味的显著下降：臭味群落、前体酶丰度、分布和环境主导因素的变化

众所周知，2-甲基异龙脑（2-MIB）是饮用水水库中普遍存在的异味来源。在饮用水水库中进行的三项原位实验中，带生物填充系统的扬水曝气器的总体效果最为明显。2-MIB 的去除率高达 98.70%，mic 基因的丰度降低了 99.30%。元基因组测序确定了关键基因，包括甲基转移酶基因（mtf）、2-MIB 环化酶基因（mic）和环核苷酸结合蛋白基因（cnb），突出了放线菌、蓝藻和蛋白菌群落在导致水库产生臭味方面的潜在作用。此外，在生物填充系统中，MVA 途径和 MEP/DOXP 途径中的臭味前体酶的丰度受到抑制。研究发现，总氮（TN）和硝酸盐（NO3--N）是影响 2-MIB 产臭微生物存在的关键因素。水库水中产臭物种的有效管理与污染物的有效去除密切相关。这些发现将为开发水库除臭技术提供有价值的见解，并让研究人员更深入地了解臭味过程的基本机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.