What is an RO (Reverse Osmosis) Membrane?

 

-“RO” stands for “Reverse Osmosis” and the RO Membrane is an advanced filter which can purify even sea water to be pure enough to drink*. The fibers of the
RO Membrane are so fine (1mm/10Mil) and it only let water molecule through.
That is why the RO Membrane can produce pure water from sea water.

This technology was developed in the U.S in 1950 for a project to produce fresh water from sea water. Now it is widely used from the industrial field to household application and NASA has introduced this technology as well.



 

Pros & Cons of RO Equipment

 

Pros
  • Steady water production under any conditions – even in Stand-By mode/decelerated operation mode/rough weather conditions
  • Minimizes frequency of shore fresh water supply
  • Produces much more water without using waste heat, which makes the plant compact than evaporator types.
  • Easier maintenance, lesser workload for crew with automatic operation
  • More space for cargo, replacing with shore supplied water
  • Reduces waiting time for shore supplied water
Cons
  • Operation is limited at contaminated river (mud)/sea ports (same as evaporator)
  • RO Membrane requires regular replacement (every 3-5 years)
  • Chemical/filter requires regular replacement
  • (When installing to existing vessels) Installing space is required in the engine room (carried out during Dry Dock)

 

Appearance/Specification

 

  • Easy operation by following instructions on the touch panel
  • Less time/complexity for component replacement
  • Maintains high water quality by using a unique slime control chemical,which Kurita developed
  • Minimizes your crew’s workload by operation/maintenance manuals that are easy to understand

Type
K-SM15
K-SM30
Standard desalination capacity
15m3/day
30m3/day
Product quality
Less than 100mS/m
Water supply conditions Std. water supply
4.2m3/h
4.9m3/h
Water quality
Less than 35,000ppm(TDS)
Water Temperature
32℃
Power supply
380/400/440V 50/60Hz 3①
NRP of High-pressure pump
15kW
Size Width
1,700(2,440)mm
Length
750mm
Height
1,860(1,860)mm
Product Weight
720(1,000)kg
800kg(1,080)kg
Full Equipped Weight
890(1,250kg)kg
990(1,420)kg

Comparison(KURITA Serve Master vs Evaporator type)

 

Type RO Membrane Evaporator
Heating System Electric power Waste heat from main engine+ electric power
Desalination Ratio ±95% ±70-80%
Fluctuation due to output from equipment None Yes
Operation Auto(by button) Manual(by valve)
Limitation Contaminated river(mud)/sea ports Contaminated river(mud)/sea ports/at Stand by mode
Maintenance
Chemical Injection/consumed parts replacement

 

Kurita’s Global Network

 
Kurita will support your business with their wide network – 46 locations in Japan, 12 locations abroad and additional future support offices in alliance with trading companies.

We welcome your visit at Kurita’s R&D center in Tochigi, Japan to see the RO units. Please ask us for details.