|   Tel: +86 150 0225 9955   |   Wechat: Bundor_marketing   |    Skype: +86 150 0225 9955

Home » News » Valve Knowledge

What valves do sewage plants use

Posted by Bundor valve
In sewage treatment plants, common valves are gate valves, globe valves, ball valves, butterfly valves.Because is the sewage treatment plant wastewater is particularly corrosive, common strong acid and strong alkaline, so in the choice of valves and pipelines on the material is inclined to stainless steel 316 and titanium alloy, corrosion resistance.
sewage valve
According to the process design and requirements of the choice of valves, valves are likely to use the common, gate valve, globe valve, ball valve, butterfly valve.Process control, may use solenoid valve, pneumatic valve, check valve, one-way valve, throttle valve and so on.

Modern sewage treatment technology, according to the degree of treatment, can be divided into one, two and three treatment, generally according to the water quality and the direction of the treated water to determine the degree of sewage treatment.Valves are also different for each level.

Primary treatment

The main method is to remove the suspended solid pollutants in sewage. Most of the physical treatment methods can only complete the requirements of primary treatment.After primary treatment of sewage, BOD can be removed generally about 30%, not up to discharge standards.Primary processing is the pretreatment of secondary processing.Used in valves and pipe accessories are: knife gate valve, three eccentric butterfly valve, filter, etc.

Secondary treatment

The main removal of colloidal and dissolved organic pollutants (BOD, COD) in sewage, the removal rate can reach more than 90%, so that organic pollutants to discharge standards, suspended solids removal rate up to 95% good effluent effect.Used valves, soft seal butterfly valve, gate valve, ball valve, check valve, etc.

Tertiary treatment

Further treatment of refractory organic matter, nitrogen and phosphorus can lead to eutrophication of water soluble inorganic matter.The main methods include biological nitrogen and phosphorus removal, coagulation and precipitation, sand filtration, activated carbon adsorption, ion exchange and electrodialysis.The valves used are butterfly valve, gate valve, ball valve, check valve, rubber, etc.

Sewage plant commonly used valve procurement and valve agent, on the Bundor valve.