Membrane Fouling

Although membrane fouling is often caused by issues with pre-treatment, in some cases the effects can be controlled by correct antiscalant selection and dosage.

We can also recommend speciality cleaning products for the successful removal of foulants, however it is important to apply the cleaning products correctly. We can design a specific cleaning programme for you

Antiscalant: Genesys LF - does not act as a nutrient source

Application: Biofouling - accumulation of microorganisms such as bacteria, algae, and fungi on the membrane surface, resulting in the formation of biofilms. Specialist attention should be paid to alkaline cleaning, antiscalant selection, pre-treatment and shut down procedures.

Cleaners: Prevention: Genesol 30, 32 biocides, Removal: Genesol 40, Genesol 704, Genesol 734 & 764

Antiscalant: Genesys LF - will sequester iron

Application: Iron - common type of foulant found on membrane surfaces. Sources of iron include naturally occurring iron in most feed waters, overdosing of ferric based coagulants and corrosion products from distribution systems.

Cleaners: Genesol 38 & Genesol 721

Antiscalant: N/A

Application: Alumino-silicate (clay) - naturally occurring colloidal particles, which have not been removed by the pre-treatment system. Difficult to remove from lead elements due to impermeability.

Cleaners: Genesol 704, 734 & 764 difficult to remove, consult Genesys for procedure design

Antiscalant: Genesys LF - will sequester aluminium ions

Application: Aluminium - membrane fouling can often occur as a result of excessive dosing of aluminium coagulants and poor operation of the filtration system. It is very difficult to remove from the membrane surface.

Cleaners: Special conditions of pH required, Genesol 34 and 36 - consult Genesys for detailed protocol

Antiscalant: Genesys LF will sequester manganese

Application: Manganese - less common than iron fouling. When water containing manganese is oxidised, insoluble colloidal hydroxide particles are formed.

Cleaners: Genesol 38 & 40