Water purification | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-10

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Water_purification


00:02:34 1 Sources of water
00:05:14 2 Treatment
00:05:23 2.1 Goals
00:06:14 2.2 Pretreatment
00:07:39 2.2.1 pH adjustment
00:09:20 2.3 Coagulation and flocculation
00:12:10 2.4 Sedimentation
00:14:21 2.4.1 Sludge storage and removal
00:15:02 2.4.2 Floc blanket clarifiers
00:15:38 2.5 Dissolved air flotation
00:16:24 2.6 Filtration
00:16:42 2.6.1 Rapid sand filters
00:18:46 2.6.2 Slow sand filters
00:20:28 2.6.3 Membrane filtration
00:21:19 2.7 Removal of ions and other dissolved substances
00:23:12 2.8 Disinfection
00:24:02 2.8.1 Chlorine disinfection
00:26:03 2.8.2 Chlorine dioxide disinfection
00:26:39 2.8.3 Chloramination
00:27:27 2.8.4 Ozone disinfection
00:29:27 2.8.5 Ultraviolet disinfection
00:30:26 2.8.6 Ionizing radiation
00:30:43 2.8.7 Bromination and iodinization
00:31:17 2.9 Portable water purification
00:31:46 2.10 Additional treatment options
00:34:09 3 Other water purification techniques
00:40:49 4 Safety and controversies
00:41:36 4.1 Demineralized water
00:43:24 5 History
00:44:05 5.1 Sand filter
00:46:38 5.2 Water chlorination



Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.

Learning by listening is a great way to:
- increases imagination and understanding
- improves your listening skills
- improves your own spoken accent
- learn while on the move
- reduce eye strain

Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.

Listen on Google Assistant through Extra Audio:
https://assistant.google.com/services/invoke/uid/0000001a130b3f91
Other Wikipedia audio articles at:
https://www.youtube.com/results?search_query=wikipedia+tts
Upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts
Speaking Rate: 0.9503659801254702
Voice name: en-GB-Wavenet-B


"I cannot teach anybody anything, I can only make them think."
- Socrates


SUMMARY
=======
Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water fit for specific purposes. Most water is purified and disinfected for human consumption (drinking water), but water purification may also be carried out for a variety of other purposes, including medical, pharmacological, chemical, and industrial applications. The methods used include physical processes such as filtration, sedimentation, and distillation; biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination; and the use of electromagnetic radiation such as ultraviolet light.
Water purification may reduce the concentration of particulate matter including suspended particles, parasites, bacteria, algae, viruses, and fungi as well as reduce the concentration of a range of dissolved and particulate matter.
The standards for drinking water quality are typically set by governments or by international standards. These standards usually include minimum and maximum concentrations of contaminants, depending on the intended use of the water.
Visual inspection cannot determine if water is of appropriate quality. Simple procedures such as boiling or the use of a household activated carbon filter are not sufficient for treating all possible contaminants that may be present in water from an unknown source. Even natural spring water – considered safe for all practical purposes in the 19th century – must now be tested before determining what kind of treatment, if any, is needed. Chemical and microbiological analysis, while expensive, are the only way to obtain the information necessary for deciding on the appropriate method of purification.
According to a 2007 World Health Organization (WHO) report, 1.1 billion people lack access to an improved drinking water supply; 88% of the 4 billion annual cases of diarrheal disease are attributed to unsafe water and inadequate sanitation and hygiene, while 1.8 million people die from diarrheal disease each year. The WHO estimates that 94% of these diarrheal disease cases are preventable through modifications to the environment, including access to safe water. Simple techniques for treating water at home, such as chlorination, filters, and solar disinfection, and for storing it in safe containers could save a huge number of lives each year. Reducing deaths from waterborne diseases is a major public health goal in developing countries.