{"title":"区分污垢和老化,进行基于条件的扩散器维护","authors":"Oscar Samuelsson, Simon Bengtsson","doi":"10.1016/j.watres.2024.122534","DOIUrl":null,"url":null,"abstract":"Diffuser maintenance such as cleaning and membrane replacement are key to energy-efficient aeration at water resource recovery facilities (WRRFs). In previous research, fouling and ageing effects on diffuser performance have been lumped together by only comparing new and used membranes. But meaningful diffuser maintenance requires that fouling (mitigated by cleaning) can be separately assessed from ageing (calling for membrane replacement). Therefore, we analysed how the standard oxygen transfer efficiency (SOTE) and dynamic wet pressure (DWP) changed due to fouling, separately from the ageing effects, in six diffusers after 1.5 to 15 years in operation at different WRRFs. This required an elaborate cleaning procedure of the used membranes and additional measurements. The results showed that fouling increased DWP with up to 40 mbar, which is in line with previous findings and up to twice as much as new membranes. Ageing, on the other hand, surprisingly led to a reduced DWP in the order of 5–10 mbar. The SOTE loss for the combined fouling and ageing effects (up to 28 %) were on par with previous research. However, fouling was only accountable for less than half of this performance loss (12 % SOTE loss and below), whereas ageing was attributed up to 25 % SOTE loss, which has not been seen before. The extent of performance loss as well as the relative contributions of fouling and ageing varied between WRRFs. Altogether, these new insights emphasize the need to monitor both ageing and fouling to facilitate effective maintenance and calls for more research on how ageing impacts diffuser membranes.","PeriodicalId":443,"journal":{"name":"Water Research","volume":null,"pages":null},"PeriodicalIF":11.4000,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Differentiating fouling from ageing for a condition-based diffuser maintenance\",\"authors\":\"Oscar Samuelsson, Simon Bengtsson\",\"doi\":\"10.1016/j.watres.2024.122534\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Diffuser maintenance such as cleaning and membrane replacement are key to energy-efficient aeration at water resource recovery facilities (WRRFs). In previous research, fouling and ageing effects on diffuser performance have been lumped together by only comparing new and used membranes. But meaningful diffuser maintenance requires that fouling (mitigated by cleaning) can be separately assessed from ageing (calling for membrane replacement). Therefore, we analysed how the standard oxygen transfer efficiency (SOTE) and dynamic wet pressure (DWP) changed due to fouling, separately from the ageing effects, in six diffusers after 1.5 to 15 years in operation at different WRRFs. This required an elaborate cleaning procedure of the used membranes and additional measurements. The results showed that fouling increased DWP with up to 40 mbar, which is in line with previous findings and up to twice as much as new membranes. Ageing, on the other hand, surprisingly led to a reduced DWP in the order of 5–10 mbar. The SOTE loss for the combined fouling and ageing effects (up to 28 %) were on par with previous research. However, fouling was only accountable for less than half of this performance loss (12 % SOTE loss and below), whereas ageing was attributed up to 25 % SOTE loss, which has not been seen before. The extent of performance loss as well as the relative contributions of fouling and ageing varied between WRRFs. Altogether, these new insights emphasize the need to monitor both ageing and fouling to facilitate effective maintenance and calls for more research on how ageing impacts diffuser membranes.\",\"PeriodicalId\":443,\"journal\":{\"name\":\"Water Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":11.4000,\"publicationDate\":\"2024-10-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Water Research\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1016/j.watres.2024.122534\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water Research","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.watres.2024.122534","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}
Differentiating fouling from ageing for a condition-based diffuser maintenance
Diffuser maintenance such as cleaning and membrane replacement are key to energy-efficient aeration at water resource recovery facilities (WRRFs). In previous research, fouling and ageing effects on diffuser performance have been lumped together by only comparing new and used membranes. But meaningful diffuser maintenance requires that fouling (mitigated by cleaning) can be separately assessed from ageing (calling for membrane replacement). Therefore, we analysed how the standard oxygen transfer efficiency (SOTE) and dynamic wet pressure (DWP) changed due to fouling, separately from the ageing effects, in six diffusers after 1.5 to 15 years in operation at different WRRFs. This required an elaborate cleaning procedure of the used membranes and additional measurements. The results showed that fouling increased DWP with up to 40 mbar, which is in line with previous findings and up to twice as much as new membranes. Ageing, on the other hand, surprisingly led to a reduced DWP in the order of 5–10 mbar. The SOTE loss for the combined fouling and ageing effects (up to 28 %) were on par with previous research. However, fouling was only accountable for less than half of this performance loss (12 % SOTE loss and below), whereas ageing was attributed up to 25 % SOTE loss, which has not been seen before. The extent of performance loss as well as the relative contributions of fouling and ageing varied between WRRFs. Altogether, these new insights emphasize the need to monitor both ageing and fouling to facilitate effective maintenance and calls for more research on how ageing impacts diffuser membranes.
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.