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Wed 26 Dec, 2007 09:23 pm
The number of people diagnosed as having a certain intestinal disease has dropped significantly in a rural county this year, as compared to last year. Health officials attribute this decrease entirely to improved sanitary conditions at water-treatment plants, which made for cleaner water this year and thus reduced the incidence of the disease
can you please explain the meaning of the bold colored text
bold colored text is difficult to understand.
need help
water-treatment plant = a place where they make water from the sewer clean enough to water crops or to drink.
The water treatment plants were improved, and so people drank cleaner water.
still not understadable about water-treatment -plant
google image search gave me
http://fayetteville-ga-us.org/vertical/Sites/%7B7C2ED344-BB55-4347-B057-121AA147A84D%7D/uploads/%7B44EB74B8-C265-491E-A9B8-ED1781267C05%7D.JPG
this is water treatment plant.
it seems its a plant which purifies dirty water taking water from sweage/drains.
and then it produces drinkable water and supplies to city .
am i right ?
there are two kinds of water treatment plants.
1a sewage or wastewater treatment plant usually treats the water to a high enough quality so that it can be spray irrigated onto the land or discharged into a stream IT IS NOT DRINKING WATER QUALITY
2 A water treatment plant (for drinking water) takes stream water or ground water and treats it to a "Safe Drinking WAter" standard and then sends it through a pipeline to serve as drinking water.
2 different kinds of plants with2 different missions. In many countries they use treated sewage water several times for carrying sewage (they call these dual water systems). This means that sewage water is allowed to collect new sanitary and "grey" water at ends of discharge lines from homes or towns. Its much more ecologically sound to have a dual system, it saves money and gets the job done with less wasted water.
Intestinal diseases often come from people drinking unclean water.
Water treatment plants are usually huge buildings containing large water purification systems that can take water and make it pure enough for human consumption.
Plants = machinery, buildings or factory.
perhaps this is where the confustion comes from . . .
Many very dangerous intestinal diseases and parasites are transmitted by contaminated water.
When the water supply is improved, the number of intestinal maladies drops dramatically.
farmerman wrote:In many countries they use treated sewage water several times for carrying sewage (they call these dual water systems). This means that sewage water is allowed to collect new sanitary and "grey" water at ends of discharge lines from homes or towns. Its much more ecologically sound to have a dual system, it saves money and gets the job done with less wasted water.
That seems sensible, farmerman, but is it not any more difficult to then treat the heavily laden sewage water? Is this a system that is in use on airlines in the sense that the "heavy stuff" is removed and the liquid reused?