Wastewater (design & construction) is our core business since 1994 when TEBAG Internacional started operations in Costa Rica. We have accumulated 16 years of expertise in this field in different countries, and during that time we have become recognized experts. We like what we do, and most importantly, we do it right. That is the main motivation we have for providing the integral solution you require in waste-water engineering.

1. Biologic:
Removal mechanisms
- Aerobic
Precipitation Organic
- Anoxic Filtration matter
- Anaerobic
Suspended
solids
Biochemical
oxidation Nutrients
- Nitrogen
Adsorption - Phosphorus
Solubilitation Heavy
Degradation of metals
organic matter
Vegetable assimilation
Tel.: (+506) 2224-9198 / 2225-7016 www.tebag.cr info@tebag.cr

2. Removal mechanisms
Aerobic:
Degradation of organic
matter; biochemical
oxidation
Anoxic:
Reduction of
nitrates
Anaerobic:
Degradation of
persistent organic
matter
Tel.: (+506) 2224-9198 / 2225-7016 www.tebag.cr info@tebag.cr

3. Removal mechanisms
► Organic matter
Bacterial activity and
vegetable assimilation
•Carbohydrates (aerobic) Aerobic
zones:
•Persistent organic compounds
(anaerobic)
•Phenols
Anaerobic
•Pesticides/Insectisides zones:
Energy
Energy
•Greases and Oils
Oxidation zone
•1012 bacteria per gramm of soil
•Hydrocarbons
•5000 different types of bacteria
•Surfactants
Tel.: (+506) 2224-9198 / 2225-7016 www.tebag.cr info@tebag.cr

4. Removal mechanisms
►Suspended solids
Filtration and
precipitation
•Reduced filtering speeds
•Shallow depths
Oxygen
Oxigeno
•Filtration through vegetable
matter and plant’s roots
Aerobic
•Interaction with organic bed zone
(soil) Zona de reducción
Reduction zone
Zona de
Oxidation
oxidación
zone
Tel.: (+506) 2224-9198 / 2225-7016 www.tebag.cr info@tebag.cr

5. Removal mechanisms
► Nutrients
Solubilitation through
bacterial activity and
vegetable assimilation
Phosphorus
Oxygen
• Absorption in clayey minerals
• Chemical precipitation:
Aerobic
Alkaline (Ca): Ca5(PO4)3OH zone
Acid (Fe / Al): FePO4 / AlPO4 Anoxic zone
2NO3 + 2H (Denitrification)
N2 + H20 +2,5 02 (Desnitrificación)
Nitrogen
• Reduction of NO3 (nitrate) to N2 (free
nitrogen) by anoxic processes
Tel.: (+506) 2224-9198 / 2225-7016 www.tebag.cr info@tebag.cr

6. Removal mechanisms
► Heavy metals
Removed by
adsorption and
vegetable
assimilation
• in acid pH: solubilized in
anoxic zones
• in alkaline pH: precipitation in
aerobic zones
• Retained and assimilated by
plant’s roots
Tel.: (+506) 2224-9198 / 2225-7016 www.tebag.cr info@tebag.cr