World Water Monitoring Day 2021 is on Saturday, September 18, 2021: how is city water treated?
Saturday, September 18, 2021 is World Water Monitoring Day 2021.
Water treatment is the process of purifying water, thereby making the water safe to drink. Because it is a good solvent, water picks up all sorts of natural pollutants, and most water found in nature is unsafe to drink. Today almost every city in the world treats their drinking water.
In the State of Texas, current rules and regulations have accelerated the need for more competent, skilled water utility operators upon whose shoulders rest the responsibility for safely and successfully treating the water supply for the City of Lewisville. All operators at the Lewisville Water Treatment Plant are certified and licensed by the Texas Commission on Environmental Quality, ensuring the water that reaches your home meets or exceeds current U.S. Government Standards. The monitoring being done here by a certified operator is performed twenty-four hours a day, seven days a week, three hundred sixty-five days a year.
1. INTAKE: Raw (untreated) water is pumped from Lewisville Lake through six turbine pumps mounted on a piered intake structure. The intake structure is located near Lewisville Lake. The quality of the raw water is fairly stable throughout the year. The average turbidity, or a measurement of how clear the water is, is 8.5 NTU with a pH and alkalinity of 8.0 and 100, respectively. Activated carbon is used at the intake structure from June through September to aid in the control of taste and odor associated with algae bloom in the warm summer months.
2. NEW INTAKE: The City of Lewisville, through a joint project with the Upper Trinity Regional Water District, is nearing completion of a new raw water intake structure located east of the existing intake. In addition to the intake, a new 36-inch raw water transmission line has been constructed and should be placed into service prior to the spring of 2002.
3. CHEMICAL ADDITION: Chlorine, ammonia, liquid ferric sulfate, lime, and polymer are added to the water. The water and chemicals are mixed together to start the purification process. Chlorine and ammonia combine to form chloramine, which is a disinfectant. Ferric sulfate, together with lime, serves as coagulants. The polymer is a filter aid. These chemicals kill germs, improve taste, remove odor and help to settle solids. A small amount of fluoride is added after the treatment process to aid in the prevention of tooth decay.
4. COAGULATION AND FLOCCULATION: Ferric sulfate and other chemicals cling to foreign matter and particles dissolved in the water. This process is called coagulation. It causes the particles to stick together and form larger particles, called floc.
5. SEDIMENTATION: The water and floc particles flow into a sedimentation basin. The floc then settles to the bottom and is removed from the water. A certified operator is seen taking a sample of the water in the sedimentation basin. The operators perform 2,065 process control tests in their on-site laboratory each week.
6. FILTRATION: From the sedimentation basin, the water flows through filters. Filters are made of layers of gravel, sand and anthracite coal. The filters are used to remove any particles remaining in the water.
7. DISINFECTION: A small amount of chlorine and ammonia is added to kill any remaining bacteria and to keep the water safe as it travels through the distribution lines to the public.
8. STORAGE: The water flows into a ground storage reservoir called a clearwell. This allows time for the chlorine and ammonia to mix through out the water so disinfection can occur. The reservoirs also provide a reserve supply of water for high usage periods. The City of Lewisville has three clearwells with a combined capacity of five million gallons.
The water is then pumped into one of the City’s four elevated storage tanks (water towers). These tanks are used to provide additional storage capacity for fire protection, high usage periods, and to maintain and stabilize the pressure in the distribution system. The four elevated tanks have a combined capacity of 6.5 million gallons of drinking water.
In mid-July the City’s water system was divided into two separate pressure zones to compensate for variations in elevations in the northwest section of the city. This will help to both stabilize and increase pressure. This was accomplished through the completion of a 13.8 MGD pump station located at the Water Treatment Plant and a 2 MG elevated storage tank.
A Motorola System Control and Data Acquisition (SCADA) system monitors the water levels in each tank, as well as the status of the entire distribution system. A certified operator records the water levels in each overhead tank. The operators can also control the rate at which water is being pumped at pump stations throughout the city, as well as all valves in the overhead storage tanks, allowing for even distribution and level control. Problems in the system can easily be detected as the SCADA System records sudden drops in water pressur
how can save to water in world?
A to Z of water saving tips:
A dripping tap could waste as much as 90 litres a week.
Brushing your teeth with the tap running wastes almost 9 litres a minute. Rinse out from a tumbler instead.
Cool water kept in the fridge means you won't have to run the tap for ages to get a cold drink.
Don't use your washing machine until you've got a full load. The average wash needs about 95 litres. A full load uses less water than 2 half loads.
Every time you boil an egg save the cooled water for your houseplants. They'll benefit from the nutrients released from the shell.
Fit a water saving device in your cistern and save up to three litres a flush.
Grow your grass a little longer. It will stay greener than a close mown lawn and need less watering.
Hoeing stimulates the growth of plants, reduces water loss from the soil surface and removes weeds that take up valuable water and nutrients.
Installing a water meter can save you water and money by monitoring how much you use.
Just taking a five minute shower very day, instead of a bath, will use a third of the water, saving up to 400 litres a week.
Kettles should be filled with enough water for your needs but not to the brim. This will reduce your fuel bills too.
Lag your pipes to avoid bursts and leave your heating on a low setting while you are out in cold weather to prevent pipes freezing.
Mulch for moisture in the garden. Adding a layer of tree bark, compost, coconut husks or even newspaper keeps the sun off the soil and retains precious moisture.
No further watering is usually required for established trees and shrubs.
Once a week is all the watering your lawn needs even in the hottest weather. Over- watering can weaken your lawn by encouraging roots to seek the surface.
Purchasing a water butt will help you to collect rain water for use on the garden.
Question your local garden centre about the water requirements of different plants. Some thrive in drier conditions.
Replacing a toilet cistern can save water. Toilets manufactured after 1993 use less water per flush.
Sprinklers can be wasteful. It doesn't take long for a sprinkler to soak your lawn thoroughly. A sprinkler can use as much water in an hour as a family of four will use in a day!
Trigger nozzles can save water by using it only when needed. This can save up to 225 litres a week.
Use the dirty water when cleaning a fish tank on your houseplants. It's rich in nitrogen and phosphorus, which provides an excellent fertiliser.
Very 'water efficient' washing machines and dishwashers are now manufactured. Machines with 'A' ratings are the most economical.
You'll find that they save on energy too.
Water your garden at the coolest part of the day to reduce evaporation.
Xeriscape means 'to landscape for water conservation.' The idea is to use plants that require less water. You can also utilise objects for decorative effect such as rocks, bricks, benches and gravel.
You can use less water by turning the hot tap down, rather than the cold tap up, if you require cooler water.
Z The end of the alphabet but not the end of water saving ideas - why not get in touch and tell us of any you've discovered?
Could you tell me what day when I get to finish watching the game?
No World Series tonight; Game 5 may resume tomorrow
20 minutes ago
PHILADELPHIA (AP) — The World Series won't resume until Wednesday night at the earliest. With rain still falling in Philadelphia, Major League Baseball decided not to attempt to complete Game 5 between the Phillies and Tampa Bay Rays on Tuesday night. The completion of the game tentatively was scheduled for 8:37 p.m. Wednesday.
"While obviously we want to finish Game 5 as soon as possible, the forecast for today does not allow for us to continue the game this evening," commissioner Bud Selig said. "We are closely monitoring tomorrow's forecast and will continue to monitor the weather on an hourly basis. We will advise fans as soon as we are able to make any final decisions with respect to tomorrow's schedule."
The game, played in increasingly heavy rain, was suspended Monday following a 30-minute delay with the Phillies and Rays tied 2-2 after 5 1/2 innings. It was the first time a World Series game that began wasn't played to completion on the same day.
Philadelphia leads the Series 3-1 and is hoping to close out its second title, its first since 1980.
Carlos Pena hit a tying, two-out single in the sixth for the Rays, and the umpires called it moments later. By then, every ball and every pitch had become an adventure because of the miserable conditions.
"The infield was tough. The ball would do funny things," Phillies second baseman Chase Utley said. "It was in bad shape. It was not playable."
If Pena had not tied it, Selig said he would not have let the Phillies win with a game that was called after six innings.
"It's not a way to end a World Series," he said. "I would not have allowed a World Series to end this way."
MLB changed its rules on suspended games in November 2006, adding a provision to resume them rather than replay them. In either case, this would have been a suspension because the visiting team tied it in the top of an inning and the home team never got to bat in the bottom half.
"It was terrible. The field wasn't bad, but it was the worst conditions I've ever played in," Tampa Bay third baseman Evan Longoria said.
The delay forced the Rays to find a hotel in Wilmington, Del., about 25 miles away.
About 10 minutes after the game was officially suspended, an announcement was made at Citizens Bank Park telling fans wrapped in plastic sheets they were done for the night.
By then, many had left their seats and streamed into the concourses. They crowded six or seven deep, trying to see any of the game before the umps signaled for the tarp.
Because it was only lightly raining when the game started, MLB hoped it could play a full nine innings. Quickly, however, the showers turned to a steady downpour and the field became a quagmire.
By the middle innings, the grounds crew was running shuttles onto the field, carrying bags of a drying agent — baseball's version of cat litter — to absorb the water.
A puddle formed on home plate and umpire Jeff Kellogg resorted to using a towel rather than the usual whisk broom to wipe it clean.
Batters kept blinking back the rain drops and pitchers struggled with their footing. Strong gusts dropped the wind-chill factor into the 30s, and fielders covered their bare hands between pitches.
All-Star shortstop Jimmy Rollins of the Phillies chased a popup all over and dropped it for a tough error in the fifth. There were pools of water at every base and the Phillie Phanatic wore a rain slicker for his routine.
B.J. Upton beat out an infield hit with two outs in the sixth on a ball that Rollins bobbled. Upton stole second and hustled home on Pena's hit, with left fielder Pat Burrell's throw home plopping into a puddle in the grass.
Fans showed up hoping they'd be witnesses to a World Series championship. Shane Victorino got them cheering with bases-loaded single in the first for a 2-0 lead off Scott Kazmir.
Rays manager Joe Maddon tinkered with his lineup, dropping the slumping Pena and Longoria one spot each — they were a combined 0-for-29 with 15 strikeouts after four games.
The Tampa Bay stars ended their hitless ruts in the fourth when Pena doubled off the right-field wall and Longoria followed with an RBI single up the middle that made it 2-1.