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According to reports on increasing nitrate concentration in the groundand surface-water, in recent years, there is some dilemma for nitrate pollution in drinking water.
PNF Co. offers selective electro dialysis process as an efficient solution for nitrate removal from drinking water.
Electro dialysis technology is an advanced method in water and wastewater treatment for solute contaminants removal. In this method, the water flows through the cationic and anionic membranes and the nitrate ions conducted to an ion concentrated section as a trap via an induced electric filed.
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Desalination is considered as a common solution for the regions with shortage of fresh water resources. There are various methods for brackish and sea water desalination.
PNF Company has developed modified electro dialysis technology as an appropriate and efficient for desalination.
The developed process is an electrochemical technique in which the ionic contaminants are removed from the aqueous solution. In this method, separation of salt from water is conducted in the presence of anionic and cationic membranes under the influence of an electric field.
This device is a colored wastewater treatment apparatus using nanostructured graphite electrodes which operates based on electrolysis process. These electrodes are produced by cold plasma method. Carbon compounds, especially graphite, have great properties which make them interesting for utilization as a cathode electrode. Using different types of modification methods in different systems make colored compounds, p-nitrophenol contaminants, azo dyes elimination and hydrogen peroxide production possible. Among electrode modification methods, plasma- based methods are generally cheap, clean and easy, which require less time. In order to purify the wastewater, firstly the carbon electrodes are modified by the plasma process to increase specific surface area and H2O2 production on the surface of the electrodes and then, modified electrodes are used as a cathode for electrolysis of wastewater.
PNF Co has an innovational combination of methods to meet textile industries requirement. The most important advantages of the applied technologies are feasibility and efficiency in this problem.
In electro-oxidation process, a kind of electric current applied into the electrolytic reactor causes the colloidal impurities to de-stabilize, resulting in agglomeration and flotation and subsequent removal. Dissolved impurities contributing BOD/COD also get oxidized due to the oxidizing agents released by the electrolytic solution which changes them into a state that is either less colloidal and less emulsified (or soluble). Also, Color has been decreased during this process. PNF Co is using a special coated plate and also power source to improve the operation and also decrease power consumption of the electro-oxidation unit. Electro dialysis unit also is used to remove salts and other ionized contaminants and makes the water suitable for re use.
Geomembrane is a very low permeable synthetic membrane which is used in various geotechnical engineering projects to control water or gas leakage. It has been confirmed that for this application, geomembranes are more efficacious than other traditional products such as concrete, asphalt, and compacted clay. This product has a wide range of properties, i.e. physical, mechanical and chemical resistance, to protect our environment and water resources. It is worth mentioning that the antibacterial activity of polymers reinforced with silver nanoparticles is stable and its high antibacterial efficiency has been observed against different species of bacteria. Silver ions and its compounds can kill a wide range of bacteria, while they have no toxic effect to the human body. Therefore, the use of silver in different forms is a common method of protection against bacteria.
In DPSN gray water treatment systems, gray water is treated using multichannel platelet nanostructure ceramic membranes in a hybrid membrane process. Pore size of the applied ceramic membranes are engineered in nanometric scale to obtain high quality water for recycling in industrial applications, washing in domestic applications and agriculture consumptions. The used ceramic membranes in these systems are guaranteed for long times (5-10 years) with low fouling problems by applying intervallic back washing services.
Biodegradable plastic is plastic that decomposes naturally in the environment. This is achieved when microorganisms in the environment metabolize and break down the structure of biodegradable plastic. The end result is one that is less harmful to the environment than traditional plastics. Biodegradable plastics can be composed of bioplastics, which are plastics made from renewable raw materials. There are normally two forms of biodegradable plastic, injection molded and solid. The solid forms normally are used for items such as food containers, leaf collection bags, and water bottles.