Siemens Water Technologies has announced new pre-engineered Reverse Osmosis (RO) systems for treating seawater, brackish waters and high salinity wastewaters. The company claims that the pre-engineered package systems, with mobile-based, self-contained units, enable efficient site installation and rapid deployment. For larger flow requirements, the systems consist of factory-assembled building blocks, which can be re-assembled on site to facilitate a fixed plant design. The seawater reverse osmosis system is designed for a wide range of applications from the production of low salinity process water to wastewater reuse and recycle.
According to the company, the fullyintegrated, mobile based self-contained RO system incorporates three main components: a safety filter, a high pressure pump and energy recovery system and a membrane array complete with motor controls and central control system. All necessary pipes, pumps and ancillary equipment are included and pre-assembled into a standard overseas shipping container. Similarly packaged mobile pretreatment systems, post treatment systems and membrane Clean-in-Place (CIP) units are also available to create a complete water treatment system.
Larger flow systems, which require equipment that is too large to be fully built within the confines of standard overseas shipping containers, are designed in manageable sub-assemblies, which are built and tested in the factory and, then, shipped to the job site for final field assembly, thus limiting the amount of field work. These sub-system building blocks are system-engineered into a customer- focussed solution to meet the needs of each individual application. Siemens claims that the Desal Developed systems incorporate robust components designed with energy efficiency in mind. The electric motor-driven high pressure pump is controlled by a Variable Frequency Drive (VFD) controller thus creating only the necessary membrane feed pressures. An energy recovery system is utilised to recycle the waste pressures found in the concentrate stream. According to the company. these features yield an electrical efficient design that produces permeate water in the range of three to four kwh/m3, depending upon feed water temperature and salinity.
