Fouling-Resistant
Low-Pressure Spiral RO Membrane Element LF10-D

Strong fouling-resistant membrane achieved by neutralizing electrical charge on the membrane surface and introducing hydrophilic radicals.

Outline

LF10-D is a high performance RO membren element contributing to environmental protection by purifying contaminated water. The surface of conventional high rejection, low-pressure RO membranes was negatively charged and hydrophobic radicals existed, which caused susceptibility to the influence of heavy metals such as iron colloid and other metals or the absorption of charged substances. With Nitto Denko's high performance low-pressure RO membrane, LF10, its surface maintains neutral charge and adopts hydrophilic radicals to solve these problems. This product is available for a wide application, which enables the use for hard treatment as well as high-level pretreatment.

Features

• High rejection performance at 1.0-1.5MPa low-pressure operation. It improves the quality of treated water by separating dissolved elements to a high degree.
• Electrical charge on the membrane surface is neutral, so there is almost no impact from charged substances such as surface-active agents.
• Hydrophilic radicals on the surface of the membrane make the membrane much less fouled by heavy metals such as iron colloids and minor organic substances.

Applications

LF10-D is available for:
[Purification and recycling of contaminated water]

• High-level treatment of sewage or garbage seepage.
• Concentration and recycling of rinse water discharged from factories.

[Advanced treatment of clean water (underground water and river water)]

• Removal of dissolved iron and hardness.
• Removal of poisonous materials (arsenic, fluorine, nitrate nitrogen, etc.)

[Recovery of ultrapure rinse water discharged from semiconductor/liquid crystal factories]

[Various kinds of separation, refining or concentration]

Sizes

LF10-D8	Φ201×1,016L[mm]
LF10-D4	Φ99.5×1,016L[mm]
LF10-D2	Φ61×1,016L[mm]

Treated water quality examples

Item	Unit	Feed as ion	Permeate as ion	Concentrate as ion	Rejection [%]
pH	(-)	7.1	5.9	7.2	-
Electrical conductivity	µs/cm	584	6.63	632	98.9
TDS	mg/L	308	4.62	366	98.6
Total Hardness		25.2	0.41	27.5	98.5
SiO2		5.20	ND(<1.0)	6.80	-
COD		7.20	ND(<0.5)	7.60	-
Total Nitrogen		35.1	0.40	43.8	99.0
M Alkalinity		23.1	ND(<2.4)	24.3	-
NO3-N		66.6	1.3	73.6	98.2

[Evaluation conditions]

Operating pressure: 1.0MPa

Water Temperature: 25°C

Recovery rate:15% LF10-D4

[Remarks]

*The above values are sample observed values, not the guaranteed performance. Also, they are not necessarily representing optimum operating conditions. Please contact Nitto Denko's sales representative for advice on using this product.

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