There is provided a retrofit control module that is connectable to various types of reverse osmosis systems, and a method of using the same. The retrofit control module includes a controller, the controller being located within a housing. The controller includes a first communication interface, the first communication interface being connectable to the reverse osmosis system, a processing unit and a memory connected to the processing unit. The processing unit is configured for receiving at least one parameter of the reverse osmosis system, comparing the at least one parameter of the reverse osmosis system with a predetermined threshold and in response to the at least one parameter of the reverse osmosis system being above the predetermined threshold: transmitting a control parameter to the reverse osmosis system, the control parameter causing the reverse osmosis system to control at least one component of the reverse osmosis system.

There is provided a retrofit control module that is connectable to various types of reverse osmosis systems, and a method of using the same. The retrofit control module includes a controller, the controller being located within a housing. The controller includes a first communication interface, the first communication interface being connectable to the reverse osmosis system, a processing unit and a memory connected to the processing unit. The processing unit is configured for receiving at least one parameter of the reverse osmosis system, comparing the at least one parameter of the reverse osmosis system with a predetermined threshold and in response to the at least one parameter of the reverse osmosis system being above the predetermined threshold: transmitting a control parameter to the reverse osmosis system, the control parameter causing the reverse osmosis system to control at least one component of the reverse osmosis system.

An assembly for reverse osmotically desalinating water, including a source containing feed water to be desalinated, a high-pressure tank having a first portion and a second portion and a movable piston wall operationally connected therebetween, a first portion inlet operationally connected to the first portion and a second portion inlet operationally connected to the second portion, a first portion outlet operationally connected to the first portion and a second portion outlet operationally connected to the second portion, a first valve having a first first valve inlet, a second first valve inlet, a first first valve outlet in fluidic communication with the first portion inlet and a second first valve outlet in fluidic communication with the second portion inlet, a high-pressure pump operationally connected to the source and to the first first valve inlet, a second valve having a first second valve inlet in fluidic communication with the first portion outlet and a second second valve inlet in fluidic communication with the second portion outlet and a second valve outlet, at least one reverse osmosis module having at least one reverse osmosis module inlet connected in fluidic communication with the second valve outlet, at least one brine outlet and at least one desalinated water outlet, a circulation pump having a circulation pump inlet port connected in fluidic communication with the brine outlet and a circulation pump outlet connected in fluidic communication with the second first valve inlet, andan electronic controller operationally connected to the first valve, to the second valve, to the high-pressure pump and to the circulation pump.

A method of desalinating water, including the steps of when electricity costs between a first predetermined price and a second predetermined price, fill water is pumped into a reverse osmosis desalination unit to yield desalinated permeate and saltwater having a first salinity, when electricity costs less than the first predetermined price, fill water is pumped into a reverse osmosis desalination unit to yield desalinated permeate and saltwater having a second salinity, and when electricity costs greater than the second predetermined price, pure water is flowed into a reverse osmosis unit to yield pressurized saltwater which is run through a turbine to generate electricity. The first salinity is lower than the second salinity.

A method of desalinating water, including the steps of when electricity costs between a first predetermined price and a second predetermined price, fill water is pumped into a reverse osmosis desalination unit to yield desalinated permeate and saltwater having a first salinity, when electricity costs less than the first predetermined price, fill water is pumped into a reverse osmosis desalination unit to yield desalinated permeate and saltwater having a second salinity, and when electricity costs greater than the second predetermined price, pure water is flowed into a reverse osmosis unit to yield pressurized saltwater which is run through a turbine to generate electricity. The first salinity is lower than the second salinity.

An online cleaning system for micro-polluted nanofiltration membranes uses forward osmosis, and a process of the online cleaning system, and relates to the field of water treatment membrane separation technique. The online cleaning system includes a nanofiltration raw water tank, a nanofiltration membrane assembly, a pure water tank, a forward osmosis feed solution tank, a forward osmosis draw solution tank, a first saline water tank, a second saline water tank and a water bath temperature control device. Compared with convention techniques, some embodiments include efficient cleaning of the nanofiltration membranes that is realized by using forward osmosis as a nanofiltration membrane cleaning system, and cyclic regeneration of the nanofiltration membranes can be realized, so that the purposes of removing dissolved organic matters in micro-polluted raw water, reducing hardness of calcium and magnesium and prolonging the service life can be achieved.

An online cleaning system for micro-polluted nanofiltration membranes uses forward osmosis, and a process of the online cleaning system, and relates to the field of water treatment membrane separation technique. The online cleaning system includes a nanofiltration raw water tank, a nanofiltration membrane assembly, a pure water tank, a forward osmosis feed solution tank, a forward osmosis draw solution tank, a first saline water tank, a second saline water tank and a water bath temperature control device. Compared with convention techniques, some embodiments include efficient cleaning of the nanofiltration membranes that is realized by using forward osmosis as a nanofiltration membrane cleaning system, and cyclic regeneration of the nanofiltration membranes can be realized, so that the purposes of removing dissolved organic matters in micro-polluted raw water, reducing hardness of calcium and magnesium and prolonging the service life can be achieved.

Apparatus and processes for controlling a reverse osmosis system for water desalination to reduce energy consumption. The system has a controller configured to receive information from the sensor array and determine a fouling parameter for each reverse-osmosis stage based on one or more of: an A-Value, a B-value and a normalized differential pressure. The controller is then configured to control the flow through each of the reverse-osmosis assemblies based on the determined fouling parameters to meet a predetermined criterion for total permeate production for the reverse-osmosis system.

Apparatus and processes for controlling a reverse osmosis system for water desalination to reduce energy consumption. The system has a controller configured to receive information from the sensor array and determine a fouling parameter for each reverse-osmosis stage based on one or more of: an A-Value, a B-value and a normalized differential pressure. The controller is then configured to control the flow through each of the reverse-osmosis assemblies based on the determined fouling parameters to meet a predetermined criterion for total permeate production for the reverse-osmosis system.

Provided is an apparatus for controlling a seawater desalination plant. The apparatus includes: a dissolved air flotation device configured to provide treated water obtained by treating seawater according to a dissolved air flotation (DAF); an ultrafiltration device including a plurality of ultrafiltration units each having an ultrafiltration membrane, and configured to perform an ultrafiltration (UF) process of filtering impurities remaining in the treated water using the ultrafiltration membranes of the plurality of ultrafiltration units; a reverse osmosis device; an information collection unit; and a state treatment unit.