In recent years, water treatment technology using RO membranes has rapidly spread as an effective means of reducing greenhouse gas emissions toward achieving the SDGs (Sustainable Development Goals). However, water treatment methods using RO membranes have the problem of consuming a lot of power. DeROs-E® recovers and reuses the pressure energy of the concentrated water discharged from the RO membrane, thereby significantly reducing the operating costs of water treatment facilities and contributing to the reduction of greenhouse gas emissions.
DeROs-E® can be installed as an add-on to existing RO filtration equipment. It can be used in a wide range of applications that use RO membranes, such as pure water (ultrapure water) production, industrial wastewater treatment, and sewage treatment.
■ DeROs-E®Implementation Example (1) - Pure Water (Urpure Water) Production Process - By introducing DeROs-E® into the pure water (ultrapure water) production process and recovering and reusing the pressure energy of high-pressure wastewater, the discharge volume of the High Pressure Pump can be reduced, thereby lowering the power consumption of the RO membrane system.
■ DeROs-E®Implementation Example (2) - Wastewater Treatment Process - For facilities that use RO membranes for concentration, introducing DeROs-E® can further reduce the power consumption of wastewater treatment equipment.
■ DeROs-E®Implementation Example (3) - Wastewater Treatment Process - By introducing DeROs-E® into an RO membrane system intended for the reuse of treated wastewater, the discharge volume of the High Pressure Pump can be reduced compared to systems without DeROs-E®, thereby reducing the overall power consumption of the equipment.
Features
High efficiency
We have generously incorporated the technical know-how we have cultivated with our pumps and valves into DeROs-E® . It boasts extremely low internal losses and high energy recovery efficiency. Energy recovery efficiency is up to 99.9% . At a drainage flow rate of 20 m3 /h and an operating pressure of 2 MPa, the efficiency is 98% or higher.
Applicable to ultra-low voltage applications as well.
By using a valve developed in-house, we were able to eliminate fluid leakage and reduce the differential pressure inside the equipment, making it possible to recover energy from a low pressure of 0.2 MPa .
Low noise and vibration
The noise level must be 75 dB(A) or less at a distance of 1 meter from the machine. The flow within each cylinder is precisely controlled by a Switching Valve located in each cylinder. By operating the moving parts at a low speed, low noise and low vibration are achieved.
Reduces power consumption by more than 40% *1
When " DeROs-E® " is introduced into a water treatment facility using RO membranes (production water flow rate 30 m3 /h, wastewater flow rate 20 m3 /h, operating pressure 4 MPa), it is possible to reduce the power consumption of the High Pressure Pump used in the facility by more than 44.5% compared to when it is not introduced.
Lubrication of bearings and other components is completely unnecessary, and no extra utilities are required.
The meaning behind the " E " in " DeROs-E® ".
The " E " in DeROs-E® stands for Evolution, Extreme , Economical , and Environment Friendly.
Operating Principle
Video explaining the operating principle
A pair of cylinders are set in parallel, and low-pressure raw water and high-pressure concentrated water are alternately supplied to the cylinders by switching the flow path inside the Switching Valve.
In the diagram above, cylinder B receives high-pressure concentrated water from the RO membrane unit, and undergoes the energy recovery process in which high-pressure energy is transferred to the low-pressure raw water inside the cylinder.
The other cylinder, A, receives low-pressure raw water from the intake pump and simultaneously performs a water supply process to discharge low-pressure concentrated water after energy recovery.
Each cylinder alternates between the energy recovery stroke and the water supply stroke to perform continuous energy recovery.
The booster pump increases the pressure to compensate for pressure losses in the RO membrane, " DeROs-E® ", and connecting piping.
Because the flow rate of high-pressure raw water supplied to the RO membrane from " DeROs-E® " reduces the discharge volume of the High Pressure Pump, it is possible to reduce power consumption.
The diagram above shows an example of DeROs-E® installed in an RO water treatment facility with a recovery rate of 60%.
Raw water with a flow rate of <100> is taken, and of that, the raw water with a flow rate of <60> multiplied by the recovery rate is pressurized by a High Pressure Pump and sent to the RO membrane.
Meanwhile, the remaining raw water <40> is sent to DeROs-E® , where the pressure of the high-pressure concentrated water discharged from the RO membrane is transmitted within the cylinder.
The pressure of the high-pressure raw water is increased by the booster pump to compensate for the pressure loss in the RO membrane, DeROs-E® , and connecting piping. It is combined with the high-pressure raw water sent from the High Pressure Pump, and the flow rate becomes <100>, which is then supplied to the RO membrane.
After energy recovery, the concentrated water is discharged as low-pressure concentrated water through a Switching Valve.
By installing DeROs-E® , the discharge volume of the High Pressure Pump is reduced by 60%, resulting in approximately 60% less power consumption and a significant reduction in electricity consumption.
specification
Equipment specifications
Applicable drainage flow rate 5～20m3/h
Maximum Operating Pressure 4.0 MPa (Energy recovery possible from 0.2 MPa)
liquid quality Industrial water, industrial wastewater, etc. (Please contact us for details)
Main material Main body: SUS304 (Optional: SUS316) Base: SS400 (Option: SUS304)
