Chemically enhanced backwashing for NOM removal of ceramic ultrafiltration membranes using conventional cleaning chemicals with a surfactant

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Creator: 

Ninan, John

Date: 

2022

Abstract: 

Membrane filtration has developed into a robust water treatment step. However, limited research has been conducted on new membrane cleaning solutions. Conventional membrane cleaners such as NaOCl are known to form DBPs with organic matter and damage polymeric membranes at high concentrations. Our research examines the use of surfactant (SDS) in combination with conventional membrane cleaners (NaOCl and NaOH) to clean a ceramic UF membrane as chemically enhanced backwash (CEB). Existing research primarily looked at the combination of surfactants with NaOH for long duration cleaning. Limited research has also been conducted on the combination of surfactants with high NaOCl concentrations. Initial tests showed the addition of SDS significantly reduced the surface tension of various CEB solutions. Subsequent fouling and cleaning studies demonstrated better cleaning efficiency when CEB contained SDS. In general, the addition of SDS provided some improvement to backwash fouling control although more research is needed in this area.

Subject: 

Environmental Sciences

Language: 

English

Publisher: 

Carleton University

Thesis Degree Name: 

Master of Applied Science: 
M.App.Sc.

Thesis Degree Level: 

Master's

Thesis Degree Discipline: 

Engineering, Environmental

Parent Collection: 

Theses and Dissertations

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