Bío River water quality recovers
Effect investment
Tuesday, January 2, 2007
Female Geneital Tattoees
The construction and commissioning of treatment plants, household sewage is beginning to bear fruit to restore the environment.
The outfall of San Pedro de la Paz was thrown into the sea in late July. Today their operation allowed the elimination of six downloads that went to the river Bio Bio.
By Nello Rolleri V.
Bío River is cleaner today than a decade ago. This statement is a subjective perception, but involves objective measurements of water quality conducted by the center of the U. Eula Concepcion.
water quality, especially in fecal coliform contamination, has improved, which is due largely to the construction and commissioning of water treatment plants served in all towns of the region that have meaning an investment in the last five years of 280 billion pesos, which is paid by the people through water bills. According
Eula's director, Oscar Parra Barrientos, decreased bacterial contamination in the final stretch of the river Bio-Bio is about 80%, which is not just an environmental recovery, but also has positive effects on human health.
in 2003 was put into service Biobío plant that allowed the water treatment in the towns of Chigwell, Concepción and Talcahuano 50%. In the middle of this year began to operate the outfall of San Pedro de la Paz, which allowed the elimination of six downloads that occurred on the south bank, explained Claudio Santelices Boetctcher, regional manager Essbío.
No But the Bio Bio river has been purified from upstream, with the elimination of discharges has allowed the commissioning of treatment plants in Los Angeles, Laja-San Rosendo, Birth, Negrete, Santa Juana and Hualqui, all built in the last three years.
currently under construction treatment plants for the towns of Dichato ($ 2,254,000), Santa Barbara ($ 1,712 million), Coelemu ($ 1,582,000), Negrete ($ 1,362,000), Cabrero ($ 1,257,000), Pinto ($ 1,042,000) , El Carmen ($ 639 million), Florida ($ 594 million), Ñipas ($ 430 million) and Ninhue ($ 340 million).
coverage reaches 87%
With ongoing investments in the Bio Bio region next year to reach a coverage of wastewater treatment 87%, above the national average of 80%, explained Claudio Santelices. These figures put
Chile first in Latin America in this area, where the average is 14% and also far from Argentina and Brazil, where the coverage does not reach 10%.
At the other extreme there are five countries in the region: Ecuador, Costa Rica, Honduras, El Salvador and Guatemala, who have coverage equal to or less than 5%.
What is missing to reach 100%?. Basically
increase sewerage coverage, particularly families living in remote rural areas or in camps in the cities. Mayor
plant regions
Biobío plant located in the commune of Hualpén, UK sector, is the largest of its kind in the region and the third largest in Chile, after Farfana and the Trebal Region Metropolitan.
day are filtered by this plant 66.5 tons of organic matter and debris, which until three years ago were thrown into the river directly.
Its technology in water treatment includes the removal of gross solids and sewage lifting plant, a primary treatment (mechanical), a secondary treatment consists of an aerobic biological process suspended culture (activated sludge) of continuous average load flow, and disinfection with chlorine gas. Clean water is returned to the river Bio Bio.
For sludge treatment plant there is anaerobic digestion of primary and secondary sludge, digested sludge dewatering by belt filter press continues, delivering in all cases a slurry with solid content of 18%. Finally
these are taken to courts and then dried to a landfill.
Dichato Solution The latest
plants under construction, the most important is to Dichato. Although it is a coastal town not build a submarine-like exists Tome and Penco, by the characteristics of the enclosed bay and because the system demand is very small and unable to take the necessary pressure for most of the year. Dichato
is characterized by a sharp increase in population during the summer, so that the plant under construction will have two operating modes: in the winter will be a plant extended aeration activated sludge, while in summer will have a chemically assisted primary treatment ( chlorine).
For Eula, although all these plants are very positive news on the environment, yet there is unfinished business. Including the need for a comprehensive monitoring program of the coastline, to assess how they are working all outfalls, both in home waters, such as industrial wastewater
SOUTH
* Journal, Wednesday 29 November 2006 .
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