Waste Water is basically the water that is no longer suitable for use. Waste Water treatment is a method that is used to translate wastewater into an effluent that can be either reused or returned to the water cycle with negligible environmental issues. Nowadays, there are number of water supplying companies like the Anglian Water in the United Kingdom that provides waste water treatment services all over the country. The treatment provided at waste water treatment plants in the United Kingdom; generally include:
Preliminary treatment: Preliminary treatment is carried out to take away grit and gravel and screening of large solids from the waste water. The main purpose of preliminary treatment is to protect the operation of the wastewater treatment plant. Grit, gravel and large solids (pieces of wood, cloth, paper, plastics, garbage, etc) are removed from the waste water to prevent any constituents that can block or damage pumps or obstruct with subsequent treatment processes. In preliminary waste water treatment process, a number of devices and equipment are used to remove or reduce the large, entrained, suspended or floating solids, heavy inorganic solids and excessive amounts of oils or greases.
Primary treatment: Primary treatment is performed to settle larger suspended, generally organic, matter. In this stage, the bulk of solids including sand and grit are separated from the liquid waste. In primary waste water treatment plant, the settled and floating materials are dislodged and the left over liquid may be discharged or put through a secondary treatment process. Primary treatment can help to reduce BOD (Biochemical Oxygen Demand) by 20 to 30% and suspended solids by up to 60%.
Secondary treatment: Secondary treatment is done to biologically break down and reduce residual organic matter. The key motive of secondary treatment is to carry out the process of bacterial break down of organic matter under controlled conditions in waste water treatment plants. Under this treatment process, microbes consume the organic matter as food, converting it to carbon dioxide, water, and energy. Secondary treatment can remove up to 85% of BOD (Biochemical Oxygen Demand) and total suspended solids.
Tertiary treatment: Tertiary treatment is necessary to address different pollutants using various treatment processes. Secondary treatment alone may not be enough to protect water from other types of contaminants present in waste water. Therefore, tertiary treatment may be required at waste water treatment plants to protect water ecosystems, abstraction source water or to meet water quality standards of a number of directives. Tertiary treatment can remove up to 99% of all contaminations from sewage.
One of the most renowned companies, offering waste water treatment services is the Anglian Water. It provides water and wastewater services to the largest and one of the driest geographical areas of all the water companies in England and Wales. For any kind of queries regarding their services, you can directly call the Anglian Water contact number and speak directly to their customer care advisors.