What are the machine components of sewage treatment equipment

Sewage treatment in general consists of the following three levels of treatment: primary treatment is it removes stones, grit and fats, oils and grease contained in the sewage through mechanical treatment such as grating, sedimentation or air flotation. Secondary treatment is biological treatment, the pollutants in the sewage are degraded and converted into sludge by microorganisms. Tertiary treatment is the deeper treatment of the effluent, which involves nutrient removal and disinfection of the effluent by chlorination, ultraviolet radiation or ozone technology. There may be wastewater treatment processes that do not include all of the above processes, depending on the goal of the treatment and the quality of the water. That sewage treatment equipment is based on the above three-stage treatment to the specific division, let's look at the specific treatment stages need equipment:

Mechanical treatment section

Mechanical (primary) treatment section including grids, sand sedimentation tanks, primary sedimentation tanks and other structures, the specific equipment used in mechanical grids, microfilter, air flotation machine, grease trap, and so on, and then there is the regulating tank. To remove coarse particles and suspended solids for the purpose of the principle of treatment lies in the physical method to achieve solid-liquid separation, the separation of pollutants from the sewage, which is commonly used in sewage treatment.

Sewage biochemical treatment

Sewage biochemical treatment belongs to the second level of treatment, in order to remove non-sedimentable suspended solids and dissolved biodegradable organic matter for the main purpose, the process composition is diverse, can be divided into activated sludge, AB method, A/O method, A2 / O method, SBR method, oxidation ditch method, stabilization pond method, land treatment method and other treatment methods. This stage involves more equipment, common buried integrated wastewater treatment equipment, UASB reactor, IC reactor, EGSB reactor and so on.

Tertiary treatment

Tertiary treatment is the depth of water treatment, now China's sewage treatment plant into the actual application is not much. It will be after the secondary treatment of water for denitrogenation, dephosphorization, activated carbon adsorption or reverse osmosis to remove the remaining pollutants in the water, and ozone or chlorine disinfection to kill bacteria and viruses, and then the water will be sent to the waterway, as a flushing toilets, sprinkler streets, watering the green belts, industrial water, fire prevention water source. The process of sewage treatment equipment used in chlorine dioxide generator, ultraviolet sterilizer, ozone generator, activated carbon filter and so on.

In addition, in the whole sewage treatment process will also use some auxiliary equipment: such as dosing mixing device, sludge dewatering equipment (belt filter press, plate and frame filter press, etc.)