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Free Water Pollution PPT Template and Google slides
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Today one of the most pressing environmental concerns is water pollution. Download this water pollution ppt template and outline your thoughts on water pollution and what can you do to prevent it.
Key Features of this free Water Pollution Presentation template:
- Stunning Visuals: From polluted water bodies to images of eco-friendly practices, this PPT on water pollutions provides you wide range of high-quality visuals to support your message.
- Clear and Concise Text: The template’s text sections are formatted for maximum readability, making it easy to create informative content without overwhelming your audience.
- Environmental Icons: Included icons help in reinforcing environmental themes and are easily customizable.
- Section Breaks: Well-structured section breaks allows you to organize your presentation seamlessly, ensuring your content flows naturally.
- Editable and Customizable: The template is fully customizable, so you can tailor it to your specific needs, whether you’re a student, researcher, educator, or environmental advocate.
Water pollution is a massive global problem. Every year, millions of pollutants are dumped into our oceans, lakes, and rivers. This contamination can cause serious health problems for both people and wildlife. Thankfully, there are ways to help prevent water pollution from happening. With this water pollution PowerPoint presentation slide , educate your audience and make them understand the causes and essential steps to be taken to reduce the impact.
Water pollution can have a devastating impact on aquatic life and the environment. But together we can protect our waters and preserve our planet! So, what you are waiting for is to get this presentation on water pollution and create awareness in society for preserving the environment.
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Water Pollution PPT Free Download | 10 Slides
Table of contents.
Water is one of the inevitable elements in our daily life. One of the studies conducted in Archiv Fur Kriminologie concluded like this. Humans will not be able to live more than 8 to 21 days without water. This conclusion points out the necessity of saving and conserving water. As we all know, almost 71 percent of the earth’s surface is water-covered. But in this, only 1 percent is freshwater which is accessible to us. This reality again emphasizes the importance of saving water and preventing water pollution.
“Water is Precious. Save Water”
Here we are focusing on the causes of water pollution and its remedies. In addition, we will discuss things that we can do to prevent water pollution. First, let’s look into what is water pollution?
What is Water Pollution?
In simple words, it is the contamination of usable water by harmful substances like chemicals or microorganisms by any means. On the other hand, activities reducing the quality of water are called water pollution.
Freshwater sources like rivers, lakes, and ponds are getting polluted in the name of industrialization. For instance, domestic wastes, food processing wastes, livestock operations can leads to the contamination of freshwater sources. Apart from all these, we humans pollute freshwater sources like ponds, rivers, and water streams by throwing household wastes and scraps into them.
How does the water get polluted?
Without any doubt, we can say that freshwater sources around us are getting polluted every day. Industrialization is one of the reasons for water pollution. The majority of the factories are dumping wastes, garbages, and sewages into nearby rivers, ponds, or lakes. The minority reprocess and resues the wastewater and substandard water.
Corporate industries are not worried about the surroundings and people living nearby. The ignorance and irresponsibility of the municipality and responsible people make the situation even worse.
In some places, the household sewage is connected to the rivers since they do not have proper sanitation and septic tank facility. It leads to one of the worst water pollutions where we knowingly pollute usable water. Earlier, urban areas were ahead in water pollution when comparing to rural areas. But now, things have changed a lot. The rate of water pollution has increased by 5x in both urban and rural areas. One of the reasons for this massive increase in pollution is the emergence of industries and factories in urban areas.
One of the practices seen in villages is washing clothes and feeding animals in the small rivers and ponds. At the same time, they wash these cattle and animals in the pond. It can directly harm the water sources when activities like this happen in a massive volume. And the other, people throw wastes into the rivers and ponds. In rural areas and villages, people even food wastes into water streams. Whatsoever, water is getting polluted every day. Here are some of the popular ways of water pollution around the world. Let’s look at some of the common causes of water pollution. Here are they.
Wastewater from factories & industries
Industries and factories use water for many purposes. Without water, manufacturing and production can’t exist. They use water for cleaning, cooling, washing, dyeing, and treatments for manufacturing and production processes. Water pollution is happening behind all industrial activities. In that, textile industries are the biggest polluters on the planet. Studies say that one-fifth of the world’s industrial water pollution comes from textile mills. For example, in China, 25% of water pollution happens through textile dyeing and treatments. Almost more than 25000 types of chemicals are mixed and used in the dyeing process of fabrics. These mixed chemicals are thrown away from the facility to any of the flowing water bodies.
The reason behind not building proper recycling and reusing units is because of high maintenance costs and implementing costs. If the companies and factories do the right thing, the pollution will come down to half. None of the government authorities check these requirements while approving the factories to operate.
Some factories produce mixed water as a byproduct of the chemical reactions that happened from their day-to-day industrial activities. This water contains chemicals substances that can be dangerous to us.
Oil leaks & spills
It is common knowledge that oil and water never dissolve completely. But it can be together like that for a long time. Oil act as a cover when it spilled on water. It can remain as long they want and thereby making it polluted. Oil spills and leakages happen very often in oceans. Sometimes from the ships that transport oil or from drilling and mining operations held underwater or seashores. These are also some of the main causes of water pollution.
Use of chemicals & pesticides in agriculture.
It is rare but happens often. When it comes to the massive use of pesticides and chemicals in agricultural lands. It becomes one of the causes of water pollution. The chemicals and pesticides dissolve in the soil after a couple of weeks. Through this, the loam gets saturated with chemicals and pesticides. When the monsoon comes, these chemicals and pesticides come out with rainwater and flows to any of the water resources like wells, ponds, rivers, and sea. It causes one of the dangerous water pollutions if we consume this water.
Why do we need to save water?
Humans cannot survive without drinking water. So it is our duty and responsibility to save and protect water from being polluted. Without drinking water, humans and animals will die. What will happen if we do not do anything? Well, right now we might have enough water resources and backups. But in the coming future, there will be a scarcity of drinking water even if we have hundreds of water purification or processing plants. So it is better to save water resources and water right now when we can.
Do you think we can survive on the earth without water? No, we cannot. It is an essential factor that holds our life. Even animals will die if the freshwater sources are over. There will be no animals and living organisms left if the water pollution rises on a huge scale. So, it is our responsibility to protect freshwater sources from being polluted.
As said earlier, the volume of fresh water on the earth is decreasing every single day. It is better to save water being wasted and polluted whenever we can. For instance, think about you are walking on a road and see a broken public water pipeline and leaks water leaks heavily. As a man who understands the value of water, we should call the respective authorities and inform them. Because they may not know about the broken pipe and water is being wasted.
How can we prevent water pollution?
By implementing proper waste management facilities, we can reduce water pollution to a considerable amount. The cause of the continuous increase in water pollution is the indigent waste management systems in factories, companies, and homes. As well as a brainy human being, stop throwing wastes mainly into water sources like ponds and rivers.
As a single human being, we have limited control over the rate of water pollution. But as a group of human beings, we can control the rate of water pollution to a substantial amount. So what we need can do is, we can aware people around us about water pollution and its future outcomes.
What each one of us can do?
It is our duty to conserve water from pollution. The fun fact is, nobody is even thinking about saving or protecting it for the coming generation. There might be plenty of water resources right now. But if its keeps getting polluted at a rapid rate, it is sure that these water streams would not last much in the future.
It is effortless to say that save water and prevent water pollution. But when it comes to daily practicality, none of us think about protecting water. We all do things that pollute our precious water sources. For instance, we all throw household garbages and plastic wastes into nearby rivers and ponds. Sometimes, we throw garbages into lands where it somehow reaches the water bodies through rain or water flow after a couple of months or years. In short, each one of us is responsible for water pollution in some ways with or without knowledge.
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Powerpoint Templates and Google slides for Water Pollution
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This coloured powerpoint icon is a great visual aid to help spread awareness of the importance of conserving water. It features a blue water droplet with a green leaf inside it, symbolizing the need to save water for a healthier environment.
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Water pollution and its prevention
Aug 09, 2014
520 likes | 792 Views
Chapter 17. Water pollution and its prevention . 1. Water pollution. What is water pollution. Water pollution can be defined as
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- biochemical oxygen demand
- lower quality treatments
- safe drinking water act
- health advisories
- outdoor privy
- ultraviolet light
Presentation Transcript
Chapter 17 Water pollution and its prevention
1. Water pollution
What is water pollution • Water pollution can be defined as "the presence of a substance in the environment that because of its chemical composition or quantity, prevents the functioning of natural processes and produces undesirable environmental and (human) health effects."
Categories of Water Pollutants
Main groups of water pollutants • Biodegradable • Rapidly degradable (non-persistent) • Slowly degradable (persistent) • Non-biodegradable
Water Pollutants: sources a. Non-point-source pollutants: agricultural runoff, storm-water drainage, atmosphericdeposition. b. Point-source pollutants: dischargesfromfactories, sewagesystems, power plants, underground coal mines, oilwells.
Strategies to bring water pollution under control: • Reduce or remove the sources • Treat the water to remove pollutants or convert them to harmless forms.
Water pollutants: types a.Pathogens b. Organicwastes c.Chemicalpollutants d.Sediments e.Nutrients
Pathogens • Infectious agents that cause sickness and death • Come from excrement from humans and other animals that are infected
Public heath • Before mid 1800s: epidemics were common in cities (typhoid fever, cholera) • After: connection between disease and sewage-carried pathogens • Today: public health measures • Purification and disinfection of public water supplies with chlorine and other agents • Sanitary collection and treatment of sewage wastes • Maintenance of sanitary standards in all facilities in which food is processed or prepared for public consumption • Public education in personal and domestic hygiene practices
Sanitation = good medicine • Good health is a result of the prevention of disease through public-health measures • Population in areas where here is little or no sewage treatment are extremely vulnerable to deadly epidemics.
Organic wastes • Includes leaves, grass clippings, trash, etc. • Enter water as a consequence of runoff or excessive aquatic plant growth • As bacteria and detritus feeders decompose organic matter, they consume dissolved oxygen (DO) in water. • BOD (biochemical oxygen demand): measures the amount of organic material in water in terms of how much oxygen will be required to break it down. • Fishes and shellfish are killed below a DOof 2 to 3 ppm • A BOD value for raw sewage is around 250 ppm
Chemical pollutants • Inorganic chemicals: include heavy metals (lead, mercury, cadmium, nickel, etc), acids from mine drainage and acid precipitation, and road salts. • Organic chemicals: include petroleum products, pesticides, industrial chemicals (PolyChorinated Biphenyls, cleaning solvents and detergents)
Sediments • Erosion from farmlands, deforested slopes, overgrazed rangelands, construction sites, mining sites, stream banks and roads increase the load of sediments.
Nutrients • Inorganic chemicals carried in solution in all bodies of water are classified as nutrients. • Include phosphorus and nitrogen • Stimulate undesirable plant growth in the bodies of water. • Sources include sewage outfalls, agricultural runoff, lawns and gardens, golf courses and storm drains.
Water quality standards • National Recommended Water Quality Criteria (EPA) provides standards for assessing water pollution. • Lists 158 chemicals and substances as criteria pollutants and recommends concentrations for fresh water, salt water and human consumption
Water quality standards • Criteria maximum concentration (CMC): highest single concentration beyond which environmental impacts may be expected • Criterion continuous concentration (CCC): highest sustained concentration beyond which undesirable impacts may be expected • Drinking water standards and health advisories: enforceable under the authority of the Safe Drinking Water Act (SDWA) • Maximum Contaminant levels (MCLs)
Arsenic as a example: • Listed as a human carcinogen • CMC and CCC values are 340 and 150 g/L for freshwater bodies, and 69 and 36 g/L for saltbodies. • Drinking water MCL concentration is 10 g/L
Other applications to the water quality criteria • National pollution discharge elimination system program (NPDES): addresses point-source pollution and issues permits to regulate discharges from industrial sources. • Total maximum daily load program(TMDL): evaluates all sources of pollutants entering a body of water, especially non-point sources
2. Eutrophication
Types of aquatic plants • Benthic • Submerged aquatic vegetation (SAV) • Emergent vegetation • Phytoplankton (algae, protists, cyanobacteria)
What is an oligo-trophic body of water? • Oligotrophic = low in nutrients
What is a Eutrophic Body of Water? • Eutrophic = well nourished
How do you create a Eutrophic Body of Water? • 1. Nutrient enrichment, natural or cultural • 2. Increased phytoplankton growth resulting in increased turbidity • 3. Loss of sunlight, food and habitat • 4. Depletion of dissolved oxygen from decomposition of phytoplankton by decomposers
How to Stop Eutrophication • Attack the symptoms: • Chemical treatments (with herbicides) • Aeration • Harvest aquatic weeds • Draw water down
How to Stop Eutrophication • Attack the root cause: • Control point-source pollutants • Ban the sale of phosphate detergents • Regulate the maximum alowablelevel of phosphates • NPDES permits
How to Stop Eutrophication • Attack the root cause: • Control non-point-source pollutants • EPA regulationsthrough the TMDL program include: • Identifypollutants • Estimate pollution commingfrom all sources • Estimate the ability of the body of water to assimilatepollutants • Determine the maximum allowable pollution load • Allocate the allowablelevel of pollution among the different sources
How to Stop Eutrophication • Attack the root cause: • Best management practices (BMPs) • Practices used to minimize erosion, runoff and leaching • Methods of soil conservation
When washings from animal facilities are flushed directly into natural waterways, they contribute significantly to eutrophication. This may be avoided by collecting the flushings in ponds from which both the water and the nutrients may be recycled.
How to Stop Eutrophication • Attack the root cause: • Recovery • Governmentpractices for the management of watersheds • Lake washington
3. Sewage Management and Treatment
History of sewage treatment • Late 1800s: human excrement was disposed in the outdoor privy • Louis Pasteur and other scientists showed that sewage borne bacteria were responsible for many infectious diseases • Human wastes started to be disposed through drain systems • The flush toilet was introduced • Water became unfit to swim in because of sewage contamination • 1900: Sewage treatment systems were developed
What is in Raw Sewage • 1. Debris and grit: plastic bags, coarse sand, gravel • 2. Particulate organic matter: fecal matter, food wastes, garbage, toilet paper • 3. Colloidal and dissolved organic matter: urine, soaps, detergents and cleaning agents. • 4. Dissolved inorganic matter: nitrogen, phosphorus, and other nutrients • 5. Pathogens: bacteria, protozoa, virus • 6. Heavy metals, pesticides, and various other toxic compounds
How Do We Remove These Substances from the Water? • Preliminary Treatment - debris and grit removed by a bar screen and grit chamber
How Do We Remove These Substances from the Water? • Primary Treatment - particulate organic matter removed by primary clarifiers
How Do We Remove These Substances from the Water? • Secondary Treatments - colloidal and dissolved inorganic matter removed by trickling filter systems or activated sludge systems
How Do We Remove These Substances from the Water? • Biological Nutrient Removal - dissolved inorganic matter removed by bacterial denitrification and bacterial uptake of phosphorusa. Can also be done inorganically by using chemical processes·Lime causes phosphate to precipitate as insoluble calcium phosphate ·Ferric chloride causes phosphate to precipitate as insoluble ferric phosphateb. Removal of the dissolved inorganic matter is not standard treatment though it is becoming more common
Final Clarification and Disinfection • Meant to eliminate pathogens • Disinfecting agents • chlorine gas • Sodium hypochlorite (chlorox) • Ozone gas • Ultraviolet light
Discharge • BOD values are 10 to 20 ppm(200 ppm in the incoming sewage) • Many cities are still operating with lower quality treatments or with no treatment at all.
Treatment of sludge • Raw sludge • Most is disposed in landfills with no previous treatment • It is considered a biologically hazardous material • It is a nutrient-rich organic material with potential to be used as organic fertilizer • Methods for treating sludge include: • Anaerobic digestion • Composting • Pasteurization
Anaerobic digestion • Raw sludge is put into large airtight tanks (sludge digesters) • Anaerobic bacteria break down the organic matter • End products include carbon dioxide, methane and water (biogas) • Treated sludge is called biosolid • Dewatered it becomes a sludge cake
Composting • Raw sludge is mixed with wood chips • Placed in piles that allow air circulation • Aerobic bacteria and other decomposers break down organic material to rich humus-like material
Pasteurization • The sludge cake is put through ovens to be pasteurized • The product is dry, odorless organic pellets.
Alternative Treatment Systems • On site wastewater treatment systems • Using effluents for irrigation • Reconstructed wetland systems
4. Public Policy
Public Policy • EPA is responsible for overseeing water • Depends on laws passed by Congress • Clean water act (CWA) of 1972 • Required permits for all point source discharges of pollutants • Clean water state revolving fund program (SRF) • Gives funds to local governments to build treatment facilities
Problems and progress • Problems • Non point source pollution • Construction of new wastewater treatment facilities • Storm water discharges • Sewer overflows • Wetlands protection • Animal feeding operations • Progress • The number of people served by adequate sewage has increased • Soil erosion has been reduced • Two-thirds of the nation’s waterways are safe for fishing and swimming • Many rivers have been cleaned up and restored
http://www.ewg.org/node/22520 • http://wn.com/Another_dead_body_in_the_Ganges_river_at_Varanasi • http://smkalammegah.wordpress.com/ • http://www.greendiary.com/entry/china-to-impose-hefty-fines-on-polluters/ • http://bio4esobil2010.wordpress.com/2011/06/01/eutrophication/ • http://www.squamlakes.org/programs/phosphorus.php • http://www.sciencephoto.com/media/183928/enlarge • http://epistimograph.blogspot.com/2011/04/blue-waters-of-mediterranean.html • http://en.wikipedia.org/wiki/File:Eutrophic_Armstrong.jpg • http://www.cee-environmental.com/en/company/info/id/2302 • http://www.jleeg.com/2010/04/09/fertilizing-with-milorganite-organic-fertilizer/dsc03501/
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One of the best PowerPoint Presentation about Water Pollution. Water Pollution PPT Free Download covers A to Z aspects of water pollution. Suitable for Seminar Topics, Class Room Presentation etc.
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105cm / 41.3". 110cm / 43.3". 115cm / 45.3". Download our entirely editable Water Pollution PPT template to showcase the types, causes, effects, and preventative measures of water pollution.
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