Water. Desalination + reuse
Issue link: https://fhpublishing.uberflip.com/i/86284
TECHNOLOGY demand for drinking water of 10-20 L per person per day, it is possible to cover 450-900 persons. Due to the Danfoss-made APPM2 energy-recovery system, the AqSep RO systems have energy consumption significantly below the normal level for seawater desalination RO units. With a power consumption of only approximately 1.2 kW continuous (3.3 kWh/m3 produced) in seawater, the AqSep RO system is among the most energy-efficient small-capacity SWRO systems in the world. of water Figure 2: A water filling station during construction power or on a small generator. However, many remote communities in The water filling stations run on grid rural Indonesia do not have grid power. For those who do, the supply is often unreliable. With the low energy-consumption of the AqSep RO system, the water filling stations will be ideal for solar-powered operation. Design calculations indicate that the entire system requires only around 2.9 kWp and a battery bank of around 7 kWh to achieve 8 hours of solar-powered operation. This power requirement corresponds to approximately 16-20 m2 depending on panel type and performance. While parliamentarians and civil servants of solar panels, Fig. 3: The compact AqSep WM9000E RO system This option would be able to provide essential drinking water to the selected communities while at the same time reducing the capital requirements significantly. With this solution, the demand for non-drinking water would have to be covered through other, existing sources. The drinking water filling stations comprise complete water purification 20 l/min ( 100% ) High pressure 20l/min (100%) High pressure Brine/Return water Brine/Return water APPM-Vario Energy Recovery For Aqsep WM9000E Membranes Membranes systems, ie, from intake (either open sea intakes or existing or newly constructed wells), prefiltration systems, an AqSep WM9000E RO system and water storage facilities. The water filling stations are in some places installed in containers, in other places in small buildings made for the purpose. The maximum production is currently 9,000 L/d. However, with an estimated Product water 6.2l/min (31%) Product water 6.2 l/min (31 %) 13.8 l/min(69%) High pressure 13.8l/min (69%) High pressure agree that this option would be ideal in many locations, decisions have not yet been taken to implement it. It has been important for the Indonesian government to make the projects sustainable. Therefore, the government has made all the capital investments and handed over the water filling stations to community-based organisations (CBOs) to handle future operation and maintenance. When choosing the technology, it was important that operation and maintenance was simple and limited to basic activities. In this way, the local caretakers would be able to handle small daily activities with fewer possibilities for mistakes. Also, the AqSep RO system basically has only one button to press: On/Off. The system runs completely automatically. A variety of sensors and the custom-made controller monitor and control the RO process, including the automated flush operation. Only when the prefilters need attention High pressure pump Feed water Low pressure Feed water Low pressure High pressure pump Water motor Brine discharge Low pressure Brine/discharge Low pressure Figure 4: The unique APPM2 Energy recovery system for the AqSep WM9000E System | 34 | Desalination & Water Reuse | May-June 2012 Water motor is caretaker intervention required. The system adjusts pressure automatically for variations in salinity, and this feature reduces the need for caretaker training and handling, compared with traditional RO systems. At the same time, the RO units are equipped with a GSM modem, which