The Continuous Vacuum Filtration Machine (CVFM) is used to filter liquids by means of a cloth membrane. The wastewater is fed into the filter from above, and is evenly distributed over the entire membrane. The membrane is self-sealing and is matched to the particular application. The filter membrane is transported and coiled by a gear motor which is activated once a certain water level is exceeded. A float switch controls the membrane transport, allowing the filter membrane together with the filter cake to be pulled upward, stripping off the cake in the process. At the same time, new membrane is drawn into the bottom end of the chamber.
The structural integrity and design of the permanent concrete pre-cast CVFM comply with the Australian Certification Authority and Engineers Australia. The RCB box is installed on a 6-meter high steel pole. The pole is anchored to the concrete floor to prevent it from being washed away in a flood.
Submersible wiring and electronic parts are rated IP55, which means water projected against the enclosure from any direction shall have no harmful effects to the wiring of the permanent CVFM.
During flood season the high water flow will run just over the CVFM. The Bureau of Meteorology regularly issues flood warnings and river height bulletins for most of the Queensland river basin.
They are sent to radio stations for broadcast, local councils, emergency services and a large number of other agencies involved in managing flood response activities.
The fish habitat will not be degraded since the CVFM is only built into a small portion of the waterway. It also has a passageway for fish to swim in and out across the filtration unit. The water quality improves as it passes through the CVFM and the contaminants and silts are removed. The CVFM is equipped with motion sensors that signal the automatic door to open so fish can pass through.
The CVFM has a replaceable filter membrane that is used to filter liquids. It is the culmination of seven years of experimentation and development. This filtering system was designed to filter most of the contaminants and chemicals from wastewater or agricultural runoff. It is made up of 4 layers of very thin sheets designed to filter chemicals, fertilizers, pesticides, silts and oil.
First, two rolls of membrane are joined by overlapping each other. The bottom layer is made up of reinforcing fabric containing woven paper micropores, ranging from 5 to 20 microns. It will then be overlapped with the third layer composed of flocculants. These promote clumping of materials, which means that there is no formation of cakes since all the flocs are in a suspended state.
The second layer is composed of either activated carbon, carbon nanotubes or nano silver, depending on the application. All germs, viruses and bacterial contamination are filtered and eliminated while passing through the filter membrane, regardless of wastewater sources.
Finally, a cloth filter layer is added to separate fine substances from liquids.
Water4Use is working with nanotechnology, which has emerged as one of the top innovative technologies with great potential for treating wastewater more effectively and efficiently than previous methods.
This filter membrane is proprietary to Water4Use.
Water4Use has developed onsite water filtration technology targeting water reuse opportunities across the entire commercial industry spectrum. One challenge for Water4Use is cleaning groundwater that was polluted by industrial or farm runoff. Through continuous research and development on processing wastewater, we discovered that using nanotechnology, and in particular iron nanoparticles, causes pollutants such as fertilizers and pesticides to rapidly degrade into a mix of harmless by-products.
As water flows across the soil and enters storm drains it can carry chemicals that contaminate the groundwater. Through vigorous experimentation and testing Water4Use R&D found a way to effectively remove those chemicals. One way to clean groundwater is to drill two wells apart from the suspected contaminated area, depending on the flow of water in the aquifer. The first well is drilled on the upstream side and the second is placed on the downstream side. The process begins by using a filter membrane whose first layer consists of carbon nanotubes and the second layer has iron nanoparticles. The Continuous Vacuum Filtration Machine (CVFM) pumps water from upstream side, mixes in iron nanoparticles, and then pumps that water into the downstream well. The nanoparticles attract contaminants, which are sucked up though the CVFM and filtered out. This process is repeated until the water in the aquafer is contaminant free.
The other way of treating groundwater with iron nanoparticles is when a rain event is forecast. Before it rains, iron nanoparticles are injected into the ground. As the rain falls it will naturally drain into the ground. The process also helps clean the soil from any pollutants that are trapped within it. Undergoing the same process used by the CVFM, the groundwater will be treated until all contaminants are removed.