wherever ultra filtration

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KMS manufactures ultrafiltration membranes in tubular, hollow fiber, spiral and flat sheetmembrane configurations.

UF is a low pressure (5 - 150 psig) process for separating larger size solutes from aqueous

solutions by means of a semi-permeable membrane. Retains oils, particulate matter, bacteria and suspended solids large macromolecules and

proteins Passes most surfactants, water, acid and alkaline compounds

Pore sizes ranging from 0.005 0.1 micron; 1K 500K MWCO Permeate is clear (non-turbid) solution void of suspended solids

Most KMS UF products for industrial applications are designed for crossflow separation, wherea feed stream is introduced into the membrane element under pressure and passed over the

membrane surface in a controlled flow path. A portion of the feed passes through the membraneand is called permeate. The rejected materials are flushed away in a stream called the

concentrate. Crossflow membrane filtration uses a high cross flow rate to enhance permeatepassage and reduce membrane fouling.


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KMS crossflow membrane filtration controls the effect of concentration polarization and the gellayer. It provides the most rapid, and hence economic, continuous membrane filtration.

For municipal applications, KMS offers hollow fiber ultrafiltration membranes that can be

integrity tested to demonstrate that the UF system is retaining bacteria and viruses. Municipal UFsystems can operate in either a single pass or recirculation mode. Hollow fiber membranes also

have the capability to be backwashed, where filtered water is pushed backwards through the

membrane to remove accumulated solids on the membrane surface. KMS municipal UF systemsprovide flexibility to operate in a range of conditions that can optimized for a specific watersource to reduce operating costs. Typical pressures for these systems are in the range of 10 -20psi.

KMS also manufactures the advanced PURON membrane bioreactor technology for use in

treating industrial and municipal wastewater. Unlike the positive pressure and controlled flowpath of crossflow membrane filtration, PURON

ultrafiltration modules are submerged in basins

of wastewater, and a slight negative pressure draws water through the walls of the fiber from theoutside to the inside. These submerged hollow fiber membrane modules have numerous

advantages over conventional wastewater treatment technology. The effluent quality is very

high, meeting stringent regulations for discharge. When reclaiming wastewater, the effluent canbe reused as process water or for irrigation. Since clarifiers are not needed capital expense islower, and the amount of plant space required is also less.

Examples of UF Applications

Application Permeate Concentrate(Retentate)

Benefits of UF


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Potable Water Potable water free

of suspendedsolids, turbidity,

bacteria and largeviruses

Water, particulate

solids

Certified for 4-log removal of

bacteria,giardia, cryptosporidiumand viruses from drinking water.

Turbidity < 0.1 NTU

OilyWastewater

Oil free (< 50mg/L) water

Water, suspendedsolids, insolublemetal hydroxides,

etc.

Consistent permeate water qualityeven when feed composition subjectto upsets. Highly concentrated oil

emulsion for waste disposal.

ElectrocoatPaint

Water, dissolvedsalts and solvents

Water, paint resinsand pigments

Allows the recovery of valuablepaint resins and pigments.

Milk Lactose and salts

solution

Protein concentrate Protein concentration at lower

energy cost than evaporation.

Whey Lactose and saltssolution

Whey ProteinConcentrate (WPC)

Protein concentration at lowerenergy cost than evaporation.

Apple juiceclarification

Low turbidity,clear juice

Juice, suspendedsolids, pulp,colloidal haze

particles.

Removes suspended solids andturbidity while allowing the passageof juice, sugar and taste.

Reuse ofmunicipal

wastewater

Water free ofsuspended solids,

bacteria & viruses

Turbidity < 0.1

NTU

SDI15 < 3

Water, particulatesolids

Polishes biologically treatedmunicipal effluent for discharge,

reuse, or feed to reverse osmosis

Industrial

MBR, e.g.malting

industry

Water

Containing*:

Suspended solids

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