An underground sewage treatment equipment is a modular biological sewage treatment system, which takes biological film as the main purification method. It fully exploits the characteristics of biological film reactors such as high biomass density, strong tolerance to pollution, low energy consumption, stable operation, and convenient maintenance, such as anaerobic biofilter and contact oxidation bed. This system offers a broad application prospect and promotional value. Below, we will introduce the operation process of the underground sewage treatment equipment:
Firstly, the installation and debugging personnel need to open the inlet and outlet valves, start the equipment's water lift pump, and begin transferring the wastewater from the regulating pool (can be constructed) to the on-site domestic wastewater treatment facility.
For equipment being initially used or debugged, stop the water pump from filling when the water level reaches half the height. Open the fan water inlet valve, start the fan, and gradually open the fan exhaust valve. Aeration in the contact oxidation pond should be continued for 48 hours before starting the water pump to raise the wastewater to three-quarters of the equipment height, followed by an additional 24 hours of aeration in the pond.
Staff must manually feel the media for stickiness and monitor the growth of aquatic microorganisms until an orange-yellow biofilm forms on the media. Only then should wastewater be continuously fed into the equipment, with the water volume gradually increasing to the designed level.
Four: Regularly monitor the growth of microorganisms in the water and promptly adjust the water inflow volume if any anomalies are detected.
To monitor the flow state of the secondary sedimentation tank, the water collected at the outlet weir must be even. Generally, sediment must be drained once every 24 hours. During the drainage process, the sludge drainage solenoid valve should be opened to lift the sludge from the secondary sedimentation tank to the sludge tank using an aeration lifting method.
Six. Subsurface sewage treatment equipment adds disinfectant (such as chlorine crystals) to the disinfection pool as needed. The incoming water from the secondary sedimentation tank passes through a disinfectant dosing tank, where part of the medication dissolves, achieving the disinfection goal. After being treated, the water stays in the clear water tank for approximately 0.5 hours before meeting the discharge requirements and can be released into the external water body.
After the equipment debugging is completed and operates normally, the system can enter automatic operation. On-site, the operation of the pumps and fans is switched to the automatic mode. Since the electrical operation control cabinet is equipped with a PLC automatic control program, which is programmed before the equipment is shipped (usually switched once per shift), there is no need for additional settings during operation.
The user should regularly test the effluent water quality in accordance with environmental discharge requirements to ensure the proper operation of the buried sewage treatment equipment.