Sterilisation of Water Using Bleaching Powder

The work of these two men changed the contemporary views on how disease was spread. By solving the cholera mystery, they helped contribute to making the world safe for bigger cities. Over the next few years a lot of changes were made. Both the medical and public health establishments latched onto Snow’s waterborne theory and through one of the greatest feats in engineering history, London started the process of making an entirely new sewer system. This, along with other precautions such as boiling water that was suspected to be contaminated, brought an end to city-wide choleric outbreaks. Besides the improvements in sewage, the improvements of sanitary conditions all around greatly diminished the spread of disease and held a major part in making the modern city possible. Overall, it turned out that something that was once horrendous and deadly for a massive amount of people, eventually turned out to be helpful for the future of mankind. (Johnson)

John Snow born on the 15th March 1813 – 16th June 1858 grew up in the poorest region of York and subsequently specialised his life establishing the link between the cholera infection he had first encountered in 1831 in Newcastle and water as its vector. Snow’s most famous attribute was his research relating to the cholera outbreak in the London Epidemic of 1854. ‘On proceeding to the spot, I found that nearly all the deaths had taken place within a short distance of the [Broad Street] pump. There were only ten deaths in houses situated decidedly nearer to another street-pump. In five of these cases the families of the deceased persons informed me that they always sent to the pump in Broad Street, as they preferred the water to

Having a hard water with Ca2+ and Mg2+ ions at home could be an annoying thing for many people. When hard water is heated the minerals in it precipitate out including the Ca+ and Mg+2 ions, these mineral start to form a coat on shower doors, bath tops, soap scums which result of addition of soap to hard water and people will find difficulty cleans with soap since hard water lose some affections in dissolving soaps as soaps get mixing with ions and less soap will be dissolving. As a response of this hard water problems water softener came to the market. Water softener works by exchange the hard water ions Ca2+ and Mg2+ with slats such as Na+ and k+ this way the hard water ions will be reduced or eliminated leading to better water quality [2].

This report recommended that the government should organise proper drainage and refuse collection, provide a pure water supply and appoint a Medical Officer of Health. However, these changes were not implemented until thirty years later when Parliament finally agreed. There were a number of reasons why the government's view of health conditions in towns changed in the 1870's. The health in towns was still very bad and there were a number of cholera epidemics, including the famous one where Dr. John Snow linked cholera to polluted water. In 1861, Pasteur proved that germs cause decay.

He linked the common illness cholera to people whom drank from the wells. He observed those getting ill and which areas and pumps they drank from and recorded it on a map, he was then able to establish all those getting ill were in fact drinking from the same pump, and consequently in 1854 John Snow removed the handle of the Broad Street pump and ceased the epidemic of Cholera in Soho, London

Dr. John Snow was known as an intelligent physician who had a background with anesthesia advancements. He believed that cholera was a waterborne disease and that it was contaminated by the sewage. Snow’s goal was to convince others about the issue and stop it from spreading. His theory about the intestinal disease, in which was published in 1849 in an article, was laughed at and many doctors believed that his idea was “wrong” and they continued to believe that it was airborne. He wanted to prove many wrong and begin to further research and experiment the disease.

The English, specifically the colonists, drank water of which was contaminated with bacteria such as Escherichia coli and high levels of saline and ended up causing diseases that

John Snow’s findings in place, the Great Stink was the last factor that finally motivated the government to deal with their contaminated drinking water. Years later, another outbreak erupted. Farr, Radcliffe, and Whitehead referred to the now deceased physician’s theory of cholera. Farr was convinced that cholera originated in contaminated water, and he found out that the drainage system in the devastated part of the city was not in use yet. The outbreak of cholera on Broad Street and the iconic map thereafter helped to improve sanitation; the reputation of this famous, clean water, and the isolated cases that specifically fetched water from this pump, were a few factors that aided Snow in his conclusion that cholera came from the Broad Street well. Dr. Snow provided the theory, and Whitehead backed it with evidence. When the scientific mainstream came to accept the cholera theory of water, hygiene was significantly bettered in cities. Sanitary water supplies and waste-removal systems became the central infrastructure project of every industrialized city on the planet. These sewer lines and freshwater pipes made the modern city safe for new inventions and developments.

A couple drops of bleach per pint of water can purify the water and make it safe to drink. The dirtier the water, the more drops you can add.

At least a billion people in the world do not have or can not afford clean water and more than a million kids die each year from drinking dirty water! In the passage, "Clean Water for a Dirty World", incredible engineers and chemists find ways to purify dirty water for the people who do not have clean water. Three different inventions were included in this passage, the Xylem method, Solar Water Disinfection (SODIS), and the Speedy filter. The Speedy filter is the best filter listed in the passage and the most useful, it can do what the other filters cannot. The Speedy filter is the most effective way for people to get clean water.

The objective of this lab was to separate a mixture that consisted of elements and compounds. There are seven ways to separate a mixture which included paper chromatography, filtration, evaporation, simple distillation, fractional distillation, magnetism, and separating funnel. The only methods used in this lab were filtration, evaporation, magnetism, and separating funnel. The method of magnetism was used when the magnet was moved under the mixture to separate the iron. The process of filtration involved the use of a filter paper placed in a filter funnel. The funnel was placed in a beaker and the mixture of water, sand, and sodium chloride was poured into the funnel. The liquid part drained through the filter paper into the beaker, leaving the solid sand particles trapped on the filter. After the water and sodium chloride were in a beaker, the process of evaporation was used. The compound was boiled on a hot plate, which led to the water

There are multiple stages that the water has to go through. First it goes through the flocculation basins, then the sedimentation basins, than the filtration, and then chlorination. In addition to these process, the plant recently upgraded to include Granulated Activated Carbon (GAC) filters and Ultra Violet Light (UV) reactors.

Craving that sun-kissed look for summer? Want to lighten your hair up a notch or two? While the effect of bleach is immediate and extreme, it's also extremely damaging to your hair. Whether it's professionally done or an at-home job, your hair can never be as healthy as it was beforehand. Luckily, there are ways to lighten and highlight hair naturally, without the use of bleach. Check out these ways to dye your hair for late summer locks.

Thirdly, the proceeding water treatment step involves coagulation and flocculation. The objective of this step is to produce particles of a size that can be easily removed by settlement and filtration. Coagulation destabilizes the colloidal particles followed by flocculation whereby larger particles are formed from small particles through collisions. Conley and Evers (as cited in Hendricks, 2006, p. 277) described coagulation as a process that reduces the surface charge

Access to clean water is a basic human right and yet people around the world don’t have that right and they struggle to survive without it. The many uses of clean and potable water include water for drinking to cooking other daily purpose. It is reported that over 1.1 billion people lack access to an improved water resource and three million individuals, and majority of them children, suffer and die from water-related disease. The need to improve water quality and providing clean water should be major project for developed countries like the US and so called “well developed countries”.