The BIOGRADEX® technology is used to treat sewage with activated sludge. The process can be used both in case of municipal and industrial sewage unless biological sewage treatment is not possible. The great advantage of that technology consists in the possibility to regulate the concentration of activated sludge in the tanks depending on the technological needs (in the winter – higher concentration, in the summer – smaller). However, there is no risk that the sludge will be washed out of secondary clarifiers, its “bulking” in the sedimentation tank. The application of the method in the process of sewage treatment allowing the degasification of the activated sludge before it reaches the secondary clarifiers enables to increase the concentration up to the level of 6,0–8,0 kg/m3 .
High sludge concentration results in a significant reduction of nitrogen and phosphorus in the gutter. In the event of rain the sludge does not get out but it is gathered in the secondary clarifier even up to 0.5 m beneath the water level. Degasification of liquids just before they reach the clarifier results in the removal of mini gas bubbles both from the sludge blanket and the liquid itself. As a result the sedimentation in the clarifier is stable and the method itself results in the increase of the sludge concentration without the above mentioned defects.
Avantages of the solution:
- Decrease of the volume of bioreactor chambers over two times, which leads to the reduction of implementation costs
- Stable operation of the treatment plant and much better results in clearing biogenes
- Decrease in the treatment plant area and as a result decrease in negative impact on the environment
- Reduction of the energy consumption during the process
- Simple maintenance of the treatment process
No other technology based on biological sewage treatment posses such features. The size and shape of facilities eg. existing chambers and sedimentation tanks is not an important factor – each existing sewage treatment plant can increase its capacity by up to 20- 40%. It has been proven by projects implemented on both big and small facilities (from Q = 300 m3/d up to Q=100 000 m3/d for a single sewage treatment line). The BIOGRADEX® technology has been patented in Poland and many countries around the world. Facilities using that technology are located in Poland, Ireland, Estonia and Canada (Calgary).
Contact information:
BIOGRADEX Holding Sp. z o.o.
Andrzej Nazar
55 Robotnicza St., P.O. box 50, 82-300 Elbląg
phone: +48 55 239 43 03
e-mail: nazar@biogradex.pl
www.biogradex.pl
