Low-Pressure Spiral RO Membrane Element ES15-D

Widely used for primary desalination in ultrapure water production systems and desalination of brackish water.

Outline

ES15-D is a fully aromatic polyamide ultra-low pressure spiral RO membrane element suitable for applications such as primary desalination in ultrapure water production systems and desalination of brackish water. Its excellent features allow drastic reduction in electricity consumption, facility costs such as pumps and piping, and saves a required installation space.

Features

• The water permeate flow increased significantly while maintaining the NaCl rejection at 99.5% which is equivalent to the previous model.
• Enables extremely low-pressure operations at 0.5-0.6MPa.

Sizes

ES15-D8	Φ 201×1,016L[mm]

Performances

Element	Rejection (％)		Permeate Flow[m3/d]
	Nominal	Minimum	Nominal	Minimum
ES15-D8	99.5	99.0	37	32

[Evaluation conditions]

Evaluation solution: 0.05%NaCl solution

Operating pressure 0.74MPa

Water temperature: 25°C

Recovery rate: 10～20%

[Remarks]

*The above values are sample observed values, not the guaranteed performance.

An example of desalination performance (4 inch element)

Element	Water	Pressure	Rejection (％)
			Electric conductivity	TDS
ES10-D4 (ES15-D equivalent goods)	*Well water	0.5MPa	96.5	99.4
	*Tap water		98.4	99.3
NTR-759HR-S4	Well water	1MPa	96.9	99.6
	Tap water		98.6	99.5

[Remarks]

*Well water: Well water in Nitto Denko Shiga Plant (Electric conductivity 9.5ms/m) Operating conditions: Water Temperature 16°C Recovery rate 14%

*Tap water : Tap water in Nitto Denko Shiga Plant (Electric conductivity 20ms/m) Operating conditions: Water Temperature 16°C Recovery rate 14%

Operating conditions

Item		Unit	Recommended operating condition	Usage limit
Operating pressure		MPa	Set according to the design Flux	Max. 4.1
Operating temperature		°C	5～30	Max. 40
Turbid content in feed water as FI value		-	≦3	Max. 4
Concentration of residual chlorine		mg/L	0	Max. 1.0(during cleaning)
pH range		-	6～8(permissible range : 2～10)	1～11(during cleaning)
Feed flow rate		L/min	-	Minimum. 245
Concentrate flow rate			75～85	Max. 56
Pressure drop	1 element	KPa	<50	Max. 80
	Over 5 element		<200	Max. 410

[Remarks]

*The figures show are only for the purpose of guidelines and not the guaranteed figures.