PB International, since 1998.
But it feels like a start-up, because everyday we are greedy to learn new things. Feel free to share your expertise, experience or opinion with us.
Ultrafiltration is just a little part of water treatment. Depending on your goal you should decide what type of filtration you will implement. Ultrafiltration modules from PB International are the perfect solution to take bacteria and virusses out of the water.
If your living in an area with a high particle rate, you should consider a self flushing UFK module from PB International. The possibility of flushing your module increases the lifespan of the module to 5 or more years. In many cases this is a financially more attractive solution then cartridge microfilters.
Microfilters are the perfect prefilters for ultrafiltration modules. We often use 10 or 20 micron candles to take out the bigger particles like sand and human hairs.
Sometimes our customers want to take dissolved solids out of the water. In these cases an ultrafilter becomes a pre-filter for reversed osmose (RO) installations.
Water purification can be very challenging. Every situation is different and needs and needs its own approve!
Sand filtration is a process in which the treatment of the water is realised by the ‘porous’ nature of a sand layer which traps particles present in water. Various other physical/ biological processes also take place in a sand filter which further strip the water of different substances (deferrisation, demanganisation, ammonium removal).
Sand filtration is frequently used in the treatment of groundwater to remove dissolved iron. Iron and manganese in the groundwater are oxidised by aeration and the flocs formed are subsequently trapped in the sand filter. After a certain period of time, the filter is saturated with particles and must be cleaned to prevent it from blocking up completely. Sand filters are cleaned by backwashing with air and/or water.
In ion exchange, ions present in the water bind to a solid material (resin, adsorbent) by means of adsorption. The ions to be removed from the water can be exchanged with ions present on the resin (e.g. softening by exchanging calcium for sodium ions), or can be removed entirely by the resin without any exchange (e.g. for the production of demineralised water). There are many resins available on the market, each of which has its own specific properties. If the ion exchanger is saturated with exchanged/removed ions, the ions are removed from it using a regenerating agent, which is usually an acid or base.
Ion exchangers can be divided into cation and anion exchangers. Cation exchangers bind positive ions and anion exchangers bind negative ions. Mixed bed systems containing both cation and anion resins are also used.
Chambers (filter tanks) which can be filled with granulated resin are used for ion exchange. The chambers are equipped with strainers at the top and bottom to prevent the resin from washing out. The exact design of the ion exchanger depends on the application: single-bed ion exchanger (cation or anion resin) or double-bed (mixed bed with cation and anion resin / strong and weak). An ion exchanger is also equipped with a regeneration station (salt, acid and/or base).
The chambers of the ion exchangers are available in plastic, steel and coated steel. Plastic can be used up to around 5 to 10 m³/h and steel is usually used for ion exchangers intended for higher flow rates.
There are numerous resins available on the market, all of which have their own specific properties. We will be happy to find the best resin for your purposes and the best setup for your installation.