DEAR SOUL, H2O WATER !!!!!!IS ESENTIAL ELIMENT IN THIS UNIVERSE
so we must save water purity healthy way
The Water Pollution Guide, where you can find useful information about the sources of h2o
water pollution and how they can be treated.
Water covers over 70% of the Earth’s surface and is a very important resource for people and the environment. Water pollution affects drinking water, rivers, lakes and oceans all over the world. This consequently harms human health and the natural environment. Here you can find out more about water pollution and what you can do to prevent itBefore raw sewage can be safely released back into the environment, it needs to be treated correctly in a water treatment plant. In a water treatment plant, sewage goes through a number of chambers and chemical processes to reduce the amount and toxicity of the waste.
•The sewage first goes through a primary phase. This is where some of the suspended, solid particles and inorganic material is removed by the use of filters.
•The secondary phase of the treatment involves the reduction of organic, this is done with the use of biological filters and processes that naturally degrade the organic waste material.
•The final stage of treatment is the tertiary phase; this stage must be done before the water can be reused. Almost all solid particles are removed from the water and chemical additives are supplied to get rid of any left-over impurities
Denitrification is an ecological approach that can be used to prevent the leaching of nitrates in soil, this in turn stops any ground water from being contaminated with nutrients.
•Fertilisers contain nitrogen, and are often applied to crops by farmers to help plant growth and increase the yield.
•Bacteria in the soil convert the nitrogen in the fertilizer to nitrates, making it easier for the plants to absorb.
•Immobilization is a process where the nitrates become part of the soil organic matter.
•When oxygen levels are low, another form of bacteria then turns the nitrates into gases such as nitrogen, nitrous oxide and nitrogen dioxide.
•The conversion of these nitrates into gas is called denitrification. This prevents nitrates from leaching into the soil and contaminating groundwater
3 Septic tanks and sewage treatment
Septic tanks treat sewage at the place where it is located, rather than transporting the waste through a treatment plant or sewage system. Septic tanks are usually used to treat sewage from an individual building.
•Untreated sewage from a property flows into the septic tank and the solids are separated from the liquid.
•Solid material is separated depending on their density. Heavier particles settle at the bottom of the tank whereas lighter particles, such as soap scum, will form a layer at the top of the tank.
•Biological processes are used to help degrade the solid materials.
•The liquid then flows out of the tank into a land drainage system and the remaining solids are filtered out
3Ozone wastewater treatment
Ozone wastewater treatment is a method that is increasing in popularity. An ozone generator is used to break down pollutants in the water source.
•The generators convert oxygen into ozone by using ultraviolet radiation or by an electric discharge field.
•Ozone is a very reactive gas that can oxidise bacteria, moulds, organic material and other pollutants found in water.
•Using ozone to treat wastewater has many benefits: ◦Kills bacteria effectively.
◦Oxidises substances such as iron and sulphur so that they can be filtered out of the solution.
◦There are no nasty odours or residues produced from the treatment.
◦Ozone converts back into oxygen quickly, and leaves no trace once it has been used.
•The disadvantages of using ozone as a treatment for wastewater are: ◦The treatment requires energy in the form of electricity; this can cost money and cannot work when the power is lost.
◦The treatment cannot remove dissolved minerals and salts.
◦Ozone treatment can sometimes produce by-products such as bromate that can harm human health if they are not controlled
maleria and other disease also raiseing pollution wateres
Virtually all types of water pollution are harmful to the health of humans and animals. Water pollution may not damage our health immediately but can be harmful after long term exposure. Different forms of pollutants affect the health of animals in different ways:
•Heavy metals from industrial processes can accumulate in nearby lakes and rivers. These are toxic to marine life such as fish and shellfish, and subsequently to the humans who eat them. Heavy metals can slow development; result in birth defects and some are carcinogenic.
•Industrial waste often contains many toxic compounds that damage the health of aquatic animals and those who eat them. Some of the toxins in industrial waste may only have a mild effect whereas other can be fatal. They can cause immune suppression, reproductive failure or acute poisoning.
•Microbial pollutants from sewage often result in infectious diseases that infect aquatic life and terrestrial life through drinking water. Microbial water pollution is a major problem in the developing world, with diseases such as cholera and typhoid fever being the primary cause of infant mortality.
•Organic matter and nutrients causes an increase in aerobic algae and depletes oxygen from the water column. This causes the suffocation of fish and other aquatic organisms.
•Sulfate particles from acid rain can cause harm the health of marine life in the rivers and lakes it contaminates, and can result in mortality.
•Suspended particles in freshwater reduces the quality of drinking water for humans and the aquatic environment for marine life. Suspended particles can often reduce the amount of sunlight penetrating the water, disrupting the growth of photosynthetic plants and micro-organisms