Assessing Pretreatment Methods to Mitigate Nanofiltration Fouling

Visa enkel post
dc.contributor.authorhallset, Beate
dc.contributor.authorJakobsson, Emma
dc.contributor.departmentChalmers tekniska högskola / Institutionen för arkitektur och samhällsbyggnadsteknik (ACE)sv
dc.contributor.departmentChalmers tekniska högskola / Institutionen för arkitektur och samhällsbyggnadsteknik (ACE)en
dc.contributor.examinerModin, Oskar
dc.contributor.supervisorModin, Oskar
dc.date.accessioned2024-09-27T16:33:01Z
dc.date.available2024-09-27T16:33:01Z
dc.date.issued2024
dc.date.submitted
dc.description.abstractGlobally, water scarcity is a critical issue affecting millions of people, exacerbated by increasing population and climate change. In countries like Sweden, where water availability is sufficient, this vital resource is often taken for granted. However, the extensive reliance on centralised water infrastructure in Sweden has its limitations. To address these challenges, modular drinking water treatment systems (MDWTS) offer a viable solution. These systems can serve as a complement to, or in the ab sence of, centralised water infrastructure, ensuring sustainable water management and availability. Membrane filtration is a compact treatment method applicable for various raw water qualities, which makes it suitable to implement in a MDWTS. However, membrane modules face an obstacle due to the risk of fouling caused by organic and inorganic compounds in the raw water. Fouling results in a reduc tion of treatment efficiency, while increasing the need of operational and economic resources. The aim of this thesis is to suggest suitable pretreatment methods for raw water to mitigate membrane fouling in a MDWTS, where nanofiltration acts as the main treatment step. The issue was investigated through a study of litera ture, identifying key foulants and possible pretreatment methods. The key foulants identified in the study of literature are particles, natural organic matter, iron, man ganese, calcium, magnesium, aluminium and silica. In addition, bench studies on a biological activated carbon filter, an alkaline filter and a charged sieve followed by a disc filter were performed to evaluate their potential to operate as pretreatment. Further, the findings were applied to three water types representing water qualities from three water sources in Sweden, aiming to suggest pretreatment chains to re duce key foulants. The pretreatment chains suggested in the result for the three water types are all spatially manageable in a MDWTS. Although, for one of the water types, the pretreatment may be challenging to implement due to operational complexity. To include additional water qualities, a general procedure connecting key foulants to suitable pretreatment methods is presented. Due to the complexity of nanofiltration fouling and the possible interactions between key foulants and the different steps in the pretreatment chain, pilot studies are necessary to evaluate the fouling mitigation. By validating the framework through pilot testing, this work can contribute to enhancing nanofiltration performance and further the development of MDWTS
dc.identifier.coursecodeACEX30
dc.identifier.urihttp://hdl.handle.net/20.500.12380/308830
dc.language.isoeng
dc.setspec.uppsokTechnology
dc.subjectMDWTS
dc.subjectNanofiltration
dc.subjectFouling
dc.subjectPretreatment.
dc.titleAssessing Pretreatment Methods to Mitigate Nanofiltration Fouling
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster's Thesisen
dc.type.uppsokH
local.programmeInfrastructure and environmental engineering (MPIEE), MSc
Ladda ner
License bundle
Visar 1 - 1 av 1
Bild (thumbnail)
Namn:
license.txt
Storlek:
2.35 KB
Format:
Item-specific license agreed upon to submission
Beskrivning:
Ladda ner
Samling
Examensarbeten för masterexamen