EUROPHAT SVERGIE AB BRIEF INTRODUCTION OF THE EUROPHAT ELECTRO-PHOSPHATE PRECIPITATION
ELECTRO-PHOSPHATE PRECIPITATION is a fullfledged, environment-friendly technique for phosphate removal from wastewater without the use, or involving only minimal use, of chemical precipitants. This technique has been successfully used for many years and optimised to ensure compatibility with most sewage treatment plants without any major revamping efforts.
The EUROPHAT ELECTRO-PHOSPHATE PRECIPITATOR controls several electrodes, which are usually installed inside the aeration tank. pH shift and ion migration cause the phosphate to be bound up into a salt, which may subsequently be eliminated together with the excess sludge.
The EUROPHAT ELECTRO-PHOSPHATE PRECIPITATION is an ecologically and econogically innovative technology for the future!
Along these lines, the EUROPHAT ELECTRO-PHOSPHATE PRECIPITATOR is a vital contribution to the sustainable management of our most crucial resource: NATURE!
How the chemical process works
During the aeration phase inside the activated sludge tank, ammonia in the effluent is converted to nitrite and further to nitrate in the presence of oxygen (nitrification), while phosphate is biologically stored.
The ELECTRO-PRECIPITATOR triggers a migration of ions (pH shift), which causes calcium or magnesium to be bound up with NO3 to form calcium nitrate oder magnesium nitrate in the form of a ion grid.
The more nitrate accumulates in the activated sludge tank during the aeration phase, the more calcium nitrate or magnesium nitrate ist formed into a ion grid. The bound-up calcium nitrate or magnesium nitrate is reduces to calcium ammonia or magnesium ammonia through the return sludge in the denitrification basin, anox zone or selector as well as during long residece times in the activated sludge tank (without oxygen supply = reduction).
The biologically bound phosphate is simultaneously redissolved. Since calcium ammonia or magnesium ammonia is positively charged, it reacts with the free negative phosphate ions to form calcium ammonium phosphate or magnesium ammonium phosphate. The latter precipitates into a salt and is adsorbed to the flocculent sludge. This results in sludge thickening and thus in an improved sludge volume index, which in turn leads to a reduction in sludge volume from 20 %! The salt is continuously removed together with the excess sludge. The remaining phosphate that has not been bound up to calcium or magnesium ammonium phosphate is taken up again in the activated sludge tank during the subsequent aeration phase. This technique is patented - Licences granted upon previous agreement!
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EPH 10 - EPH 160
On wastewater treatment plants or on industrial wastewater treatment plants the ELECTRO-PHOSPHATE PRECIPITATORS EPH 10, 20, 40, 120 or 160 are used.
The ELECTRO-PHOSPHATE PRECIPITATOR EPH 5 is designed for small wastewater treatment plants or the swimming pool cleaning and must be mounted weather-protected. Wall assembly is intended.
Wastewater treatment plants: mostly tube electrodes from iron
Industrial wastewater cleaning: depending upon conditions pipe electrodes or electrodes plates from iron, diamond electrodes
Baths, fish farms, drinking water purification: pipe electrodes or electrodes planes from iron, titanium or diamond
For environmental protection reasons no aluminium electrodes are recommended!