The results of the optimization runs using settled water as feed show that membrane operation at flux of 200 Lmh can be sustained with stable transmembrane pressure (TMP) and permeability. After that, the effect on membrane operational performance is investigated when 0.5 mg/L residual ozone is applied to the feed of the membranes with interesting...

An extensive pilot study of ceramic microfiltration (MF) in the Ceramac configuration for treating IJssel Lake water was conducted at a demonstration-scale. At a gross flux of 75 LMH, a backwash interval of 30 minutes, and a chemically enhanced backwash after the 11th backwash, a nearly constant specific flux of about 500 LMH/bar (corrected to a t...

Pilot-scale trials of four different pre-treatments to ceramic membranes were performed for a surface water in southwest England. A study of the organic character of the feed and treated provided an indication of which fraction of organics was contributing to fouling. The large molecular weight organics contributed to fouling when ion exchange was...

The use of ceramic MF was evaluated for a secondary wastewater effluent was done with no oxidant, chlorine and ozone as pretreatment and with in-line coagulation. Coagulation was required for effective control of organic fouling of the membrane. Ozone with coagulant was effective for operations but ozone cost could be prohibitive....

This paper presents the results from a twelve-month pilot study using ceramic membranes on Lake Michigan water in a sustainable manner with a flux of 103 gfd (175 lmh), with chlorinated and acidic chemically enhanced backwashes, and with pre-treatment with polyaluminum chloride coagulation. They estimate that the cleaning interval could be up to 10...

This paper describes a process comprised of ion exchange, in-line coagulation and ceramic microfiltration (MF) tested for treating surface waters in southwest England. The membrane could operate at the nominal flux of 109 lmh. The process handled abrupt water quality changes by adjusting the coagulant dosage and with the normal course of backwashes...

Ceramic membranes are being considered for reuse applications due to their durability and the ability to use strong chemicals to clean the membranes. Some pilot evaluations of different pre-treatments to ceramic membranes have been completed, and more are underway. It is clear that membranes can perform well when the pre-treatment is optimized. Thi...

This paper focuses on pre-treatment with coagulation upstream of ceramic microfiltration for treating surface water on a pilot-scale in Andijk, the Netherlands. Two coagulation systems, i.e., a conventional coagulation/flocculation system and an in-line coagulation absorber (ILCA) are compared....

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Natural organic matter (NOM) impacts membrane treatment, and is an important water quality parameter throughout the water process treatment train. This paper highlights considerations for NOM control in pre- and post-membrane processes....

In the recent years, a new advanced treatment train including ozonation and ceramic microfiltration has been piloted. This pilot study evaluates the impact of combined ion exchange and ozonation pre-treatment on the performance of ceramic microfiltration treating wastewater effluent for water re-use....

This abstracts focus on the construction works and commissioning of three international drinking water plants, that will feature PWNT?s technologies: Choa Chu Kang waterworks (CCKWW) of Singapore?s National Water Agency PUB, South West Water?s Mayflower water treatment works in Plymouth, United Kingdom and Sonnenberg water treatment plant of ewl en...

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