Garbiker: High Environmental Performance
Second Integral Plan for Urban waste management of Biscay
Why recycle? How is it done?
Garbigunes
Yellow recycling bin
Packaging materials recycled
Definitions
Types of packaging materials
The significance of the symbols
Advice for reducing the use of packaging materials
Separation Plant
Recycling Bins Placed Araba
Recycling Bins Placed Bizkaia
Amounts collected - Municipios
Amounts collected - Garbigunes
Amounts collected - Otros Centros
Controlled Landfields
Companies taking part
Visitor application form
This consists basically of a system to collect, store and regulate the leachate generated and the treatment system in itself.
Collection - storage - regulation system
This involves a system of concrete ditches that take the leachate to the pumping well which has a capacity of 200 m3. This contains two pumps with the following characteristics:
These pumps impel the leachate to a concrete pool with a capacity of 550 m3 in which two submerged stirring units operate. These are responsible for homogenising the leachate, preventing the sedimentation of the solids in suspension. The stirring units have the following characteristics:
In this pool, the first removal of the ammonia is performed by means of natural stripping. To do this, it has an air injection unit, the major characteristics of which are as follows:
Another pumping system sends the homogenised leachate from the pool to the treatment facility.
Treatment system
The removal of ammonia is greatly dependent upon the temperature and the pH (hydrogen potential) of the leachate. A soda proportioning system raises the pH of the leachate. This proportioning procedure is done automatically, maintaining a pre-established value in the leachate that may be modified by the operator of the facility.
Next, the plant undertakes the ammonia removal process in order to attain the required concentrations of 300 mg/litre of ammonium nitrogen. This operation is carried out in a desorption tower which facilitates the release of the contaminant, which is drawn by the air introduced by a 8500 metres3/hour fan. This fan impels the air against the current upwards inside the tower.
The desoprtion tower is filled with pall rings of 2 inches in diameter. These are responsible for increasing the contact surface between the liquid and the air, favouring the release of the contaminant:
