Drinking Water Treatment. The Safe Drinking Water Act (SDWA) Originally passed in 1974 Originally passed in 1974 Federal law that ensures the quality.

Slides:

Advertisements

Similar presentations

Bellringer What might be some possible downsides to using icebergs tugged from the poles as a source of freshwater?

Advertisements

Safe Water & Treatment of Drinking Water Notes. Water Treatment Process –Sedimentation – the heavy particles settle to the bottom and the clear water.

Drinking Water Treatment Seminar Leesville Middle School

TENNYSON BEN-KALIO A CHE 120 PROF. WAN JIN JANHG.

History In 1932 Plymouth constructed its first wastewater treatment plant In 1959 they transferred the sewage utilities over to Plymouth Utilities.

City of Atlanta Department of Watershed Management Bureau of Drinking Water.

Common drinking water contaminants * chlorine * fluorine * lead (often from old plumbing with lead pipes and solder; old drinking fountains are notorious)

The Water Treatment Process

LAKEISHA WESLEY. Content Area: Science Grade Level: Grade 7 Summary: This lesson will be used to establish knowledge of ways to remove contaminants from.

Water Filtration Rebecca Whalen. Background Information Water sources: Ground, Surface Water quality: influenced by pollution Forms of pollution: bacteria,

IT IS THE PROCESS OF REMOVING IMPURITIES OF RAW WATER TO BRING ITS QUALITY UP TO CERTAIN REQUIRED STANDARDS IS CALLED WATER TREATMENT.

What makes water dirty? How do we clean it. Can dirty water be cleaned? If you are like most people, you have not given ten seconds of thought to how.

Do Now for 3/6/13 Take out C43 analysis HW:

Water to drink COULTER. Water quality  Water quality- is a measurement of the substances in water besides water molecules.  Certain substances, such.

Water to Drink Where does our drinking water come from?

Water Waste Treatment.

Water treatment Lilly Corradi.

Processing, distribution and use of water.

The Drinking Water Treatment Process

Dr. Joel J. Ducoste, North Carolina State University, 1 Importance of water “Water is life” Looking at water, you might think that it's the most simple.

AIU Day 4. Water, Water, Everywhere!! Water Treatment in SW Pennsylvania.

Human Waste Disposal  More than 500 pathogenic bacteria, viruses, and parasites can travel from human or animal excrement through water.  Natural Processes.

Water in the Community: From Lake Ontario to us Thursday, March 25 th.

Water Usage and Treatment. Where does the water that we use come from? Fresh water – lakes, rivers, streams, ground water Most water on the planet is.

Purification of Polluted Water Tennyson Ben-kalio.

WASTEWATER TREATMENT NOTES

 Watch the Peel Water Treatment Tours › Water Treatment Plant Tours Water Treatment Plant Tours  Complete the reading on Peel’s Water Treatment Process.

Water Treatment Steps Aeraton Coagulation Sedimentation Filtration

S1 Science ETV – Unit 5 – The Wonderful Solvent - Water.

Water Treatment Plant Austin and Alison.

Brain Pop Please indicate if any of these water sources are considered polluted or not. In doing so, please explain your answer. 1. Cup of coffee 2. Muddy.

Date: Monday, May 11 th 2015 Topic: Water Purification Objective: To recognize the stages of it.

Water and Wastewater Treatment

Water Treatment Plants. Removes pathogens and toxic elements to prepare water for use in homes and businesses Makes water potable (drinkable)

1.Submit your Creek Survey if you haven’t already done so. 2.Which part of the water cycle is MOST responsible for polluting surface water? 3.Municipalities.

The Water Cycle. What are some things that you think are in your water?

Assignment You need to draw and label each step of the water treatment process Under each label explain what is happening in that step.

Water We have seen first hand this semester how important water is to our bodies and the world around us. But what is in the water we drink? Where does.

Lesson 8. C Describe examples of situations where solutions of known concentration are important. C Describe the process of treating a water.

What is a Water Shed? The region draining into a river.

ENVIRONMENTAL SCIENCE 5.4 The Waterworks. At the Waterworks When reservoirs or rivers are the source of drinking water, the water must be treated to remove.

The Waterworks Section 5.4. How does fresh water reach you? Ancient Romans built aqueducts – canals to carry water from the mountains to the city… some.

Pollution & Clean-up. Think Tank What do you think is happening in this picture? Take 2 minutes to write down your answer on the top or back of your notes.

Water Treatment Drinking water : Held in a holding tank settling the suspended matter. Colloidal materials such as clay are removed from water by using.

ENVIRONMENTAL SCIENCE 5.3 Before You Drink the Water.

Lecture4_introduction to drinking water, Chemeng, KKU, M.Thabuot      M. Thabuot CIP, Chemical Engineering KHONKAEN UNIVERSIT Y 1.

Safe, Clean and Drinkable

Water Treatment. Water Sources and Water Treatment Drinking water should be essentially free of disease-causing microbes, but often this is not the case.

To compile a flow diagram of the WHOLE water treatment process.

Water Quality Standards

CHAP. 2.2 – WATER TO DRINK.

Warm Up p65 Which part of the water cycle is MOST responsible for polluting surface water? Municipalities (towns) get drinking water from which two sources?

Lecture 6: Wastewater treatment

Water Treatment.

Types of Water Treatment Processes

Water Treatment.

By: Justin Sanders, Harry Black, Terrence Carothers and Noah Myers

Warm Up p65 Which part of the water cycle is MOST responsible for polluting surface water? Municipalities (towns) get drinking water from which two sources?

எனது நகரத்திற்கு வேண்டிய நீர்

DRINKING WATER.

Water Treatment.

By: Donovan, Garrett, Emi, Jalee

Water Treatment.

Water Purification (1-c)

Natural Sciences and Technology Grade 6

Nearly 1 billion people don't have safe water to drink.

Water purification in water treatment plant.

Water Quality Vocabulary Oct 18, 2011

Water Treatment.

Presentation transcript:

Drinking Water Treatment

The Safe Drinking Water Act (SDWA) Originally passed in 1974 Originally passed in 1974 Federal law that ensures the quality of Americans’ drinking water Federal law that ensures the quality of Americans’ drinking water EPA sets standards for drinking water quality EPA sets standards for drinking water quality MCLG MCLG MCL MCL

How do we treat our water in order to make it safe to drink?? After aeration, the water treatment process can be divided into 4 main steps: After aeration, the water treatment process can be divided into 4 main steps: Coagulation & Flocculation Coagulation & Flocculation Sedimentation Sedimentation Filtration Filtration Disinfection Disinfection Now, let’s look at each step more in- depth!

Aeration This is considered to be the very 1 st step in the treatment process. This is considered to be the very 1 st step in the treatment process. Aeration refers to the addition of air to the water. Aeration refers to the addition of air to the water. This allows gases trapped in the water to escape & adds oxygen to the water. This allows gases trapped in the water to escape & adds oxygen to the water.

Coagulation & Flocculation Coagulation removes dirt and other particles suspended in water. Coagulation removes dirt and other particles suspended in water. Alum (aluminum potassium sulfate) and other chemicals are added to water to form tiny sticky particles called "floc" which attract the dirt particles. Alum (aluminum potassium sulfate) and other chemicals are added to water to form tiny sticky particles called "floc" which attract the dirt particles. The combined weight of the dirt and the alum (floc) become heavy enough to sink to the bottom during sedimentation. The combined weight of the dirt and the alum (floc) become heavy enough to sink to the bottom during sedimentation.

Sedimentation The heavy particles (floc) settle to the bottom. The heavy particles (floc) settle to the bottom. Water must remain in the tank for a long period to allow the floc to settle out. Water must remain in the tank for a long period to allow the floc to settle out. Then, the clear water moves to filtration. Then, the clear water moves to filtration.

Filtration The water passes through filters, some made of layers of sand, gravel, and charcoal that help remove even smaller particles. The water passes through filters, some made of layers of sand, gravel, and charcoal that help remove even smaller particles.

Disinfection A small amount of chlorine is added or some other disinfection method is used to kill any bacteria or microorganisims that may be in the water. A small amount of chlorine is added or some other disinfection method is used to kill any bacteria or microorganisims that may be in the water.

Overview…

Animation on EPA Website Go to html Go to html html html Click on “Interactive Water Filtration Instructions” Click on “Interactive Water Filtration Instructions” When prompted, click on the bottom of the screen to start When prompted, click on the bottom of the screen to start Then, click on 3 “How to Complete the Lesson” and watch the animation. Then, click on 3 “How to Complete the Lesson” and watch the animation. As you watch, please write down each step in the treatment process. As you watch, please write down each step in the treatment process.

SDWA (continued) Maximum Contaminant Level Goal (MCLG) Maximum Contaminant Level Goal (MCLG) A level for substances found in drinking water set by the EPA and based on health effects A level for substances found in drinking water set by the EPA and based on health effects Maximum Contaminant Level (MCL) Maximum Contaminant Level (MCL) Legal limit (max) of a pollutant that’s allowed in drinking water Legal limit (max) of a pollutant that’s allowed in drinking water Often MCLG & MCL are same Often MCLG & MCL are same

SDWA (continued) The EPA regulates over 80 inorganic (ex: lead, mercury, & fluoride) and organic chemicals (ex: pesticides) found in drinking water. The EPA regulates over 80 inorganic (ex: lead, mercury, & fluoride) and organic chemicals (ex: pesticides) found in drinking water. Requires water suppliers to test water for regulated substances. Requires water suppliers to test water for regulated substances. If they exceed legal limits, they must make adjustments. If they exceed legal limits, they must make adjustments.