Introduction to Municipal Wastewater Treatment Plant

Municipal wastewater treatment plant is a highly integrated system, which consists of multiple treatment units such as anoxic tanks, anaerobic tanks, aerobic tanks, sedimentation tanks, sludge tanks and disinfection tanks. This system is designed for urban areas to efficiently purify municipal sewage and wastewater generated in daily life. Through a series of key steps, including pretreatment, biological treatment, sedimentation and disinfection, these systems can effectively remove suspended solids, organic matter and pathogenic microorganisms in sewage to ensure that the final discharged water quality meets environmental protection standards. 

Composition of Municipal Wastewater Treatment Plant

Municipal wastewater treatment plant consists of multiple components and treatment units, mainly including screen regulating tank unit, A2O unit, BAF unit and ultraviolet disinfection equipment.

Screen regulating tank unit: includes screen well and regulating tank, which is used for preliminary treatment of sewage.

A2O unit: consists of anaerobic tank, anoxic tank, aerobic tank and sedimentation tank to complete the biological treatment process.

BAF unit: integrates BAF tank to further improve water quality.

Ultraviolet disinfection equipment: disinfects the treated water to ensure water quality safety.

In addition, municipal sewage treatment plants also involve integrated sewage treatment equipment, flotation machines, centrifuges, aerators, microfilters, mechanical screen decontamination machines, UASB anaerobic reactors, IC reactors, dosing devices, chlorine dioxide generators, sewage heat exchangers and sewage source heat pumps. These components work together to improve the efficiency of municipal sewage treatment and ensure that the treated water quality meets the standards for discharge or reuse. 

Characteristics of municipal sewage treatment plants

The main characteristics of municipal sewage treatment plants are as follows:

Compared with the traditional activated sludge method, it is smaller in size, more adaptable, more resistant to shock loads, has stable effluent quality, and is not prone to sludge swelling. The new elastic three-dimensional filler used enhances the biofilm and defilming efficiency of microorganisms, improves the removal rate of organic matter, and increases the content of dissolved oxygen in water.

Equipped with a fully automatic electrical control system and a fault alarm system to ensure the safety and reliability of operation. Generally, no dedicated person is required for continuous management, and only regular inspection, maintenance and maintenance of the equipment are required.

Facilities can be installed above ground or underground. When choosing the underground type, the top can be covered with soil for greening. This not only reduces the floor space, but also beautifies the environment, achieving the dual effects of sewage treatment and environmental beautification.

The sewage treatment plant (STP) uses the "A2O+BAF+UV+sterilization" process.

The A2O process, which stands the English stands for anameric anoxic oxic, is done to destroy nitrogen and destroy phosphate by the use of hydrophilic creatures-oxygen-deficient. In the A2O, BOD5, SS and nitrogen and phosphate process in various forms will be removed one by one. In the hydrophobicity and oxygen shortage segments, the plant system is mainly composed of nitrifying bacteria and polyphospourus, and in the iceelement, the phytochemicals are mainly composed of nitrifying bacteria and polyphosporus.

BAF means aerated biological filter tank is the biofilm treatment process that coexist with solid three-phase, liquid and gas, belongs to the technology of sewage biotreatment combined with oxidation and contact purification, Its core technology is the application of foam purification material and the use it as a biological carrier for waste water treatment. A cloth water system set on the top of the BAF tank, it can evenly distributes waste water to the surface of filtration materials, so that drip water can be fully contact with oxygen. Micro-creatures on the surface of the filter material by deforming-and then re-sticking, finally formed a stable biological membrane, will not proceed with an explanation. Because of the pant and oxygen shortage caused in the membrane, there is high operation, the softener can successfully remove the contaminants once it melts through the biological membrane.

Ultraviolet sterilization is through ultraviolet light radiation, destroy and change the DNA structure of the bacteria (deoxyride acid), make bacteria die immediately or unable to produce children, in order to achieve the purpose of germicidal bacteria.

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