What is wastewater treatment?
The wastewater treatment concerns the process of removing microorganisms and other types of waste water contaminants. In more advanced countries, most domestic waste is collected in the sewer system and sent through the pipeline to the central wastewater treatment plant. In these plants, wastewater treatment is carried out in a multi -stage process that removes or changes different types of materials in the stages, so the final product or waste water is safe to return to the environment. Waste water is a collective term for water that drains toilets, sinks, showers and liquid industrial waste. The typical process of wastewater treatment includes pre -treatment as well as primary, secondary and tertiary therapeutic phases.
The preliminary treatment includes the process of removing large objects from the waste water to prevent further clogging or damage to the equipment in the processing process. Toems such as sticks, rags, female hygienic products and even fruit are removed mechanicalWhom the screening process and then are usually burned or sent to a landfill. Sand and rocks, referred to as gravel, can settle in a tank tank where they are swept into a device that collects them, after which they are also sent to the landfill.
Primary treatment works on the same principle as the pre -treatment and screening processes. Its main purpose is to allow particles to settle in the holding of the tanks, to the "sludge", which is collected and processed elsewhere. At this stage, fat and oils are also separated because they are lighter than water and hover to the top to be carried away. This allows the waste water to settle as a whole after this phase because it is more homogeneous.
The purpose of secondary wastewater treatment is to decompose a biological matter that is present in wastewater from sources such as human waste and detergents. This is achieved by thorough different related techniques, all of which afterThey use bacteria and other useful microorganisms to disintegrate the dissolved biological contaminants. These organisms also help other compounds and materials to precipitate from waste water.
In order to further increase the quality of waste water, many therapeutic plants use tertiary plants. This step is further filtration and removal of nitrogen and phosphorus. Tertiary treatment often includes disinfection, especially in developed countries. This is usually achieved either by chlorination or water treatment with ozone or ultraviolet light, all of which have the effect on removing harmful bacteria and organisms other than the water returned to the environment through the river, ocean or other way.