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Copy of Water Treatment and Disposal

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Guri Dura

on 20 March 2013

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Transcript of Copy of Water Treatment and Disposal

Water Treatment and Disposal Introduction to Water Treatment What is the purpose of these water
treatment plants? Most purposes of water treatment is to deliver water to homes. The
water is first treated, sent
to homes then disposed of in a sewage disposal Storm drainage is also part of the
sewage. When a flood happens,the
water goes to the sewage to be
drained out! It helps so the city
doesn't overflow. History of Sewage Some clues of sewage appeared in 4000 BC when scientists saw a drainage system in Iraq . They were round pipes connected to a river, under homes. In the 19th century, the Thames in
London was an open sewage system, it caused many diseases to come to the people. At first it was ignored due to funds, but was later noticed and attended to. To fix the problem engineers made a very basic sewage system with pipes connecting to homes and rivers. This taught modern engineers the importance of sewage and to properly contain it. So this lead to the making of the sewage system Here's a diagram of the water treatment and sewage disposal! Delivery: That water is pumped into water towers for easy delivery to homes. Then, more mains (pipes) carry the water to homes. Larger pipes then carry ‘used’ water (aka wastewater) from homes to a sewage system Sewage System Solid waste from the water is shredded, that mixture is sent to a holding tank that settles the water. The large particles settle to the bottom of that tank and form ‘sludge’. The liquid on top of the sludge is drained out and sent to a bacteria bed where the bacterium consumes the organic matter. That liquid is then sent to an ‘aeration’ that uses air bubbles to allow faster decomposition. The sludge is scraped of, dried then sent off to be either burned, used as farm fertilizer or sent to landfills. The sludge can also be disposed of with bacteria (who do not require oxygen). They break down the sludge, the tank uses methane to keep the tank heated at the correct temperature for the bacteria to live. The liquid is then sent here to be sprayed over gravel beds (final sewage step) This water is then dumped back into the lake after sometimes going through another sand filtration. Microorganisms in water also break down bacteria in the water. Intake and Treatment SLUDGE IS DANGEROUS:
At least two deaths have occurred with sludge spreading. In October 1994, eleven-year-old Tony Behun, went dirt bike riding near his home. Unknowingly, Tony rode through a field covered in sludge. He came home covered in dirt and grime. Two days later, he developed a sore throat, headache, and a boil on his left arm. His mother took him to the doctor, who prescribed flu antibiotics. The next day, Tony had trouble breathing. He died after being flown by helicopter to a hospital.The conclusion was that Tony had died from a bacterial infection from the sludge. First,large pipes draw in water
from rivers or lakes. The big
screens prevent garbage or
debris from entering. Water is pumped to a reservoir,
as some particles settle down here Water moves through
a filter that removes
particles and dirt In the treatment plant, chemicals (like alum)
are added to the water to make particles
flocculate (clump together) Floc (clumps) settles down as the
sediment is separated Water is forced through sand,
gravel, and charcoal to filter
sediment Cholorination (the adding of chlorine) is carried out
to kill microorganisms. The water treatment process is now finished. Highland Park Water Treatment In Highland Park, the water standard for drinking was violated (so they were unknowingly drinking contaminated water). The city was notified for this, but it was delayed, so the people were unaware until the media looked through this. The water was contaminated and could endanger people's health seriously. Now, highland park has to make critical
repairs soon or the water in the town could be very poisonous and dangerous. The problem is that this town is very low on funds. It is decided that the water plant will be
renovated and modernize with a big expansion. However, this will not be cheap, especially upgrading an 85-year old water treatment center. The project costs about $30 million and is expected to end at late 2014. For the time being, Detroit agreed to help Highland Park's water problem by supplying citizens with Detroits water. Development of Sewage Abbey Mills Pumping Station Bibliography:
1. Nelson Science : Water
2. Wikipedia : Water Treatment THE END Intake and Treatment Delivery Sewage System - How water is taken from a body of water and is treated for us to use. - How the treated water is delivered
to homes - How the wastewater water is treated and sent back to the body of water There are 3 main steps that take place in water treatment and disposal...
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