Fans for waste water and sewage treatment plants are an important part of the water cleaning process. Water treatment companies in the UK face daily challenges in delivering water that is safe and reliable while protecting those working within the sector from hazardous gases, corrosive air and high temperatures. Polypropylene fans ensure safety and the extraction of gases, vapours and fumes in toxic and corrosive environments.
The ‘S’ range of plastic extract fans are designed to provide high air flow rate against medium system pressures.
The STORM ‘ST’ range fume extraction fans are designed to provide a relatively low air flow rate against elevated system pressures.
The ATEX Series Fans are available in ATEX Zone II, explosion proof, category 3 G execution in accordance with ATEX directive 94/9/CE.
Other areas where installing the correct industrial fan is vital for the safety of staff and plant operation
Safety and maintenance requirements are critical considerations as many processes involve the use of chemicals and produce gases and high temperatures. It is essential to have efficient ventilation with the correct mechanical fans to protect staff and ensure a safe working environment. Industrial corrosion resistant fans protect plant machinery and systems from corrosion or over heating. The industry must work in accordance with the latest legislative requirements and wastewater environmental guidelines. With strict regulations to adhere to and many health and safety issues to consider in various stages of treatment, it is crucial that the correct systems are put in place. Many UK water companies are now in collaboration with the WIMES project which provides specification guidelines for water industry equipment. Learn more about the project here.
The first step of the water treatment process is ensuring that all wastewater reaches the UK’s sewage works via the drainage and into the sewers. It is then guided to the sewage treatment plant via underground pipes. Sewage that comes from pipes below the main sewer line e.g basement bathrooms or where sewer lines pose difficulty for movement may sometimes need a pumping station through to help push the sewage along in the right direction. At the sewage treatment plant the wastewater then goes through preliminary screening where debris such as nappies, wipes, plastics and gravel from the roads is removed.
The next stage is primary settlement where the wastewater is pumped into large sedimentation tanks to separate any suspended solids. The solid waste is heavy and therefore falls to the bottom of the tank forming a layer of sludge that can be removed. Once all the debris is removed the wastewater is held in tanks where the activated sludge process takes place by pumping air in the tank which encourages bacterial growth. As a result of this the water passes over specialist filter beds containing masses of waste eating bacteria. The bacteria digest the organic matter breaking it down into harmless substances. The final step of the process is the tertiary treatment where the last few waste particles are removed. The water is already very clean at this stage but depending on where the water is required often further treatment of disinfection is needed and sometimes nutrients have to be removed for environments that can’t handle excessive richness of waters.
Water Treatment Processes
Sewage wastewater treatment plants reduce pollutants in the water used by homes, businesses and industries before it is released back into the environment. The water built up from rainstorms is also a hazard to our environment, harmful substances can wash off buildings and road surfaces and run into our rivers and lakes. The survival of a wide array of species and plants living in the water relies on this treatment process to keep the water clean and habitable. Harmful bacteria are also removed from water preventing the risk of disease spreading. The inability to treat water efficiently would result is serious harm to the ecosystems and human health.
Sewage sludge is the semi solid, solid or accumulated from the water treatment process. At sewage treatment plants the sludge is separated from the wastewater and treated so that it is safe to be recycled or disposed of. The sludge is either formed from the separation of the solids in the water or is created as a resulted of biological treatments to the water. These treatment plants often receive waste material contained in or removed from a septic tank from household on site wastewater treatment systems. Often sludges are combined for further treatment and disposed of.
Desalination plants produce water for drinking and agriculture on coastal regions. The process uses chemicals to remove excess salts and minerals from sea water, rivers, streams, wastewater, industrial feed and process water. A build-up of concentrated brine ( a high-concentration solution of salt) is produced in the process which would usually end up back in the sea so a pumping system would commonly be used to prevent any harm to the eco system and marine life. However, more recently brine has been used in various processes. In 2019 Engineers at MIT News completed a study to show that through a fairly simple process the brine from this process can be converted into useful chemicals -including ones for desalination process itself more efficient.