Please enable JavaScript.
Coggle requires JavaScript to display documents.
LOI 2 - Process of water filtration. (Function) - Coggle Diagram
LOI 2 - Process of water filtration. (Function)
School
Our school filters sewage water with membranes.
How can we make that water more clean and maybe even drinkable?
How can just 1 process make the water clean enough to use?
70% of the wasted water is used in flushing the toilets which saves a lot of water as well.
About water filtration
3 stage of water filtration
Primary - During primary treatment, wastewater is temporarily held in a settling tank where heavier solids sink to the bottom while lighter solids float to the surface. Once settled, these materials are held back while the remaining liquid is discharged or moved through to the more rigorous secondary phase of wastewater treatment. These large tanks are also often equipped with mechanical scrapers that continually drive collected sludge in the base of the tank to a hopper which pumps it to sludge treatment facilities.
Tertiary - The aim of tertiary wastewater treatment is to raise the quality of the water to domestic and industrial standards, or to meet specific requirements around the safe discharge of water. In the case of water treated by municipalities, tertiary treatment also involves the removal of pathogens, which ensures that water is safe for drinking purposes.
Secondary - Secondary treatment of wastewater works on a deeper level than primary and is designed to substantially degrade the biological content of the waste through aerobic biological processes. Completing secondary wastewater treatment allows for safer release into the local environment, reducing common biodegradable contaminants down to safe levels. It is done in one of three ways:
Biofiltration uses sand filters, contact filters or trickling filters to ensure that any additional sediment is removed from the wastewater.
Aeration is a lengthy process which increases oxygen saturation by introducing air to wastewater. Typically, the aeration process can last for up to 30 hours, but it is very effective.
Oxidation ponds. Typically used in warmer climates, this method utilizes natural bodies of water such as lagoons, allowing wastewater to pass through for a set period before being retained for two to three weeks.
Process of filtering drinking water
The treatment process for drinking water varies according to the type and quality of the raw water. Common treatment methods include aeration, flocculation, sedimentation, filtration, and disinfection to ensure water is of a safe quality for consumption.
The advancement of water analysis techniques enables utilities companies to closely monitor for known substances as well as emerging contaminants of concern when a new approach to treatment is required to tackle these effectively.
Taste, odor and colour can affect the aesthetic quality of water, causing consumers to report negatively back to their water provider. Depending on the source of the water and the season, levels of natural organic matter (NOM) and organic compounds with an earthy flavor, such as Geosmin or MIB, can be detected and affect water quality.
Water companies are actively searching for an efficient and cost-effective solution for the removal of contaminants to keep the standard of their water quality as high as possible to avoid complaints.
Different processes
https://www.onlinebiologynotes.com/wp-content/uploads/2018/07/water-purification-steps-637x381.jpg
They typically consist of several steps in the treatment process. These include: (1) Collection ; (2) Screening and Straining ; (3) Chemical Addition ; (4) Coagulation and Flocculation ; (5) Sedimentation and Clarification ; (6) Filtration ; (7) Disinfection ; (8) Storage ; (9) and finally Distribution.
Field trip 1 notes
Zero liquid discharge
Toxicity of water depends on the water usage
6.5 to 8.5 PH for discharging water
Consent paper
BIS 10,500 - Drinking water
PM10
PM2.5
Best Unit - Chemical Oxygen Demand
Common Effluent Treatment Plant
American Public Health Organization