The document discusses the River Medellin in Colombia. The River Medellin originates at 3,100 meters above sea level and flows through the city of Medellin. It has become polluted due to human waste, textile mills, and factories located along the river. The "Planta San Fernando" water treatment plant processes water from the river to purify it and return clean water to the environment in an effort to reduce pollution over time. The plant measures biochemical oxygen demand and oxygen levels to determine water quality, with lower oxygen indicating more contaminated water.

1. PROJECT OF THE RIVERS
For: Miguel Ángel Orjuela – Kenan Álvarez Cano

2. RIVER MEDELLIN
 The river Medellin or river Bores it is a Colombian river that
crosses the city of Medellin and his metropolitan area. It is born to
3100 msnm in the High place of San Miguel, in the municipality of
Caldas, to the south of the Valley of Bore, and 100 km later, already
with the name of Rio Porce, it spills his waters to the Rio Nechí.

3. MAP

4. REASONS OF THE
POLLUTION
 The principal reasons are:
 The human waste.
 The textile mills.
 The factories that stay next to the river.

5. “PLANTA SAN FERNANDO”
This one, located in Itagüí's municipality, is the manager of processing
the waters that come even there, to purify them, them to become
oxygenated and to return them to the environment, to achieve that
little by little the pollution is diminished of the one that is a victim
this river that it crosses to the city.

6. «PLANTA SAN FERNANDO»

7. PROCESS OF
DECONTAMINATION
 The pollution of the water decides by means of two parameters,
one is the Biochemical Demand of Oxygen (DBO), by means of
which there measures up indirectly the quantity of organic
biodegradable present matter in the water, which allows to know the
level of oxygen that it contains: to minor quantity of oxygen, more
contaminated the water is.

9. IMAGE

11. MESSAGE

12. IMAGE OF THE RIVER
MEDELLIN IN DECEMBER

13. CYBERGRAFÍA
 http://es.wikipedia.org/wiki/R%C3%ADo_Medell%C3%ADn
 http://periodistasenlacarrera08.blogspot.com/2009/05/desconta
minacion-del-rio-medellin-ha.html.
 http://www.google.com.co/
 http://co.yahoo.com/

14. END