Small and medium-sized school sewage treatment equipment is safe and reliable

School sewage treatment equipmentWith the continuous development of the scale of universities in China, the discharge of school sewage is increasing, and the demand for the treatment of school sewage is also becoming stronger. Seeking efficient, economical, and stable sewage treatment facilities has become one of the urgent tasks at present.

Analysis of the sources of school sewage: domestic sewage from dormitories, teaching buildings, and sports halls; Canteen catering wastewater; Partial rainwater. All have good biochemical properties.small and medium-sizedThe school sewage treatment equipment is safe and reliable--Weifang Qianqiu Environmental Technology Co., Ltd.

1： School sewage treatment process diagram

Pre treatment: The catering wastewater in the canteen needs to undergo oil separation treatment. After mixing, the sewage is treated in the septic tank. The effluent from the septic tank is filtered through a grid and enters the regulating tank to adjust the water volume.

School wastewater treatmentBiochemical treatment:Considering the good biochemical properties, there are many optional processes, A2O、A/O、 Wait any time, considering economic practicality, it is recommended to use the A/O process. Biochemical effluent can generally meet the first level B standard, and some can meet the first level A standard.

Main process description:

After being collected by the drainage system, the sewage enters the septic tank of the sewage treatment plant, where it anaerobically decomposes the feces and large molecular organic matter, and then enters the regulating tank for homogenization and equalization. The regulating tank is equipped with a liquid level controller, and the signal is transmitted through the liquid level controller. It is then pumped by the lifting pump to the anaerobic tank of the integrated equipment, and after aerobic treatment, it flows into the disinfection tank for disinfection treatment. The disinfected water is directly discharged into the municipal pipeline network.

The debris intercepted by the grille is regularly loaded into a small car and dumped into the garbage dump. The sludge in the integrated sedimentation tank is partially discharged into the septic tank for sludge digestion and regularly pumped out. The clear liquid on the sludge tank flows back to the regulating tank for further treatment.

Installation process of complete set of buried sewage equipment facilities

1. The entire equipment can be buried underground, and the surface can be used for beautification or square purposes, so the equipment does not require external accumulation, building, or heating.

2. The biological oxidation tank of this device has a small volume, strong adaptability to water quality, good impact resistance, stable water quality, and will not produce sludge.

3. High purification level and low sludge generation in the entire system. The system is simple, except for the suction port, the rest of the parts are buried underground for operation, with low noise and reliable equipment. Abundant liquid gas mixture, high oxygen absorption rate, and high power efficiency.

4. Equip with a fully electric control system and system: achieve full operation in unmanned conditions. The self-control system controls the start and stop of pumps and aeration equipment according to the size of the water inflow, and starts the equipment at regular intervals, causing problems to appear. The system is equipped with manual and two forms. During debugging and maintenance, manual form can be selected, and during normal operation, manual form can be selected.



Equipment foundation, equipment, debugging and

Foundation: If this equipment is placed above the floor, only a concrete floor with the same appearance as the equipment is needed as the foundation. The pressure bearing capacity of the foundation must be greater than 4T/m3, and it should be horizontal and flat. If this equipment is buried below the floor, the foundation elevation must be less than or equal to the equipment elevation and ensure that there is no water accumulation during rain. The foundation is generally made of plain concrete (whether reinforcement is required depends on the local geological conditions).

After the equipment is completed, it must be filled with water and tested for any leaks in the pipeline interfaces. Soil can then be filled around the equipment and in the open space, and placed flat on the ground. Connect the control line of the electrical control cabinet to the equipment, and connect the electrical control cabinet to the power supply. When wiring, pay attention to the direction of the fan and water pump.

After installing the equipment, it is necessary to ensure that there is no water accumulation on the rainy ground, and there should be no heavy objects above the steel structure pool. Generally, the equipment should not be emptied of internal sewage to prevent groundwater from floating the equipment.

Small and medium-sized school sewage treatment equipment is safe and reliable--Weifang Qianqiu Environmental Technology Co., Ltd.

Equipment: The integrated domestic sewage treatment equipment should establish a set of timing criteria, with the primary vulnerable components being the fan and water pump. Regularly check the looseness of screws in various parts of the fan and water pump, the tightness of the packing box, the temperature of the bearings, and the quality and quantity of the oil to ensure that all components are normal. Check the dosage and remaining amount of the agent together, and if necessary, add and make up for it. The fan and water pump must be repaired every 5000-8000 hours of operation.

Equipment: This equipment consists of several sets of tanks, one set is a reinforced concrete structure tank body, and the other set is a steel structure tank body. The reinforced concrete pool body is buried underground, and the steel structure body can be buried underground. The civil engineering plan for the steel structure pool body and the foundation of the steel structure pool body is provided by our company, and it is required that the excavation width around it must be at least 600mm larger than the equipment plane scale.

Debugging: Our company is responsible for the debugging operation. In order to accelerate the debugging operation, bacterial strains can be added. To avoid bacterial loss, the water inlet can be reduced and the fan can be started for aeration until a layer of orange biofilm grows on the packing, which completes the packing film hanging. Then, the water inlet can be increased to the rated amount. After the completion of the packing membrane hanging, the microorganisms in the biological tank are domesticated by gradually reducing the aeration rate, making the biological tank in a state of hypoxia, and turning the microorganisms on the packing into facultative microorganisms. Then, the microorganisms are adaptively operated until they meet the planning requirements.

Product Features:

1. Underground sewage treatment equipment is buried below the ground surface, and the surface above the equipment can be used for greening or other purposes without the need for building houses, heating, or insulation.

2. The secondary biological contact oxidation treatment process adopts push flow biological contact oxidation, which has a better treatment effect than mixed or two-stage series mixed biological contact oxidation tanks. And it has a smaller volume than activated sludge tanks, strong adaptability to water quality, good shock load resistance, stable effluent quality, and will not cause sludge expansion. A new type of elastic three-dimensional packing material is used in the pool, with a large specific surface area and easy biofilm formation and detachment by microorganisms. Under the same organic load conditions, it has a high removal rate of organic matter and can improve the solubility of oxygen in the air in water.

3. The biochemical tank adopts the biological contact oxidation method, which has a relatively low volume load of the filling material, and the microorganisms are in their own oxidation stage, resulting in low sludge production. It only takes more than three months (90 days) to discharge the sludge (using fecal trucks to suction or dehydrate into sludge cakes for external transportation).

4. The deodorization method of this buried domestic sewage treatment equipment not only uses conventional high-altitude exhaust, but also includes soil deodorization measures.

5. The entire equipment processing system is equipped with a fully automatic electrical control system and equipment fault alarm system, which operates safely and reliably. Generally, there is no need for dedicated personnel to manage it, and only timely maintenance and upkeep of the equipment is required.

Installation and maintenance:

1. Foundation: If the WSC series equipment is placed above the floor, only a concrete floor with the same appearance as the equipment needs to be prepared as the foundation. The basic pressure must be greater than 4T/m2, and it is also required to be horizontal and flat. If the equipment is buried below the floor, the foundation elevation must be less than or equal to the equipment elevation and ensure that there is no water accumulation during rain. The foundation is generally made of plain concrete (whether reinforcement is required depends on the local geological conditions).

2. Installation: Position according to the installation diagram, and place each box in sequence. The position and direction of the boxes must not be misplaced, and the spacing between them must be accurate, and the pipes must be connected properly.

3. Inject clean water into the equipment and check for any leaks in the pipes. If not, cover the area around the box with soil until the equipment inspection hole is reached, and level the ground. Connect the control line of the electrical control box to the water pump, and connect the electrical control box to the power supply. When wiring, pay attention to the direction of the fan and motor, which must be the same as the direction pointed by the fan.