The rural sewage purification tank system can be called a simple simultaneous nitrogen and phosphorus removal process, and the total hydraulic retention time is less than other similar processes. Under the condition of anaerobic (anoxic) and aerobic alternate operation, filamentous bacteria will not increase in large numbers and sludge bulking will not occur, and the SVI value is generally less than 100, which is beneficial to sludge separation after biological treatment.
There is no need to add chemicals during operation, and only two A sections need to be gently stirred to avoid increasing dissolved oxygen concentration, so the operation cost is low. Because the anaerobic zone, anoxic zone and aerobic zone are strictly separated, which is beneficial to the reproduction and growth of different microbial flora, the effect of nitrogen and phosphorus removal is better. The biological selection fragment is added, and the selectivity requirement of biological activity is realized.
Installation requirements of PE biological purification tank:
1. According to the installation drawing and foundation drawing of the rural sewage purification pool, prepare the foundation and concrete floor according to the size of the installation drawing. The foundation requires an average bearing capacity of 5t/m2, and the foundation must be horizontal.
Installation can only be carried out after the pouring and curing period of concrete foundation is over. If the equipment is installed below the ground, the relative elevation of the foundation from the ground shall be subject to the drawing size, and the width and length of the surrounding excavation must be more than 500mm away from the foundation sideline, so as to install the pipeline.
2. Pipeline installation and connection should be considered when the equipment is in place. When the equipment is in place, it must conform to the weight of the equipment and the tonnage of the crane. According to the field comparison diagram, the installation sequence should be in place. The position and direction of the cylinder must not be misplaced, and the distance between them must be correct. Connect the pipes according to the installation drawing. After the equipment is in place, fix the connecting pipe with rubber pad to prevent water leakage at the joint.
4. After the installation of the rural sewage purification pool, the equipment and the foundation slab must be connected and fixed to ensure that the equipment does not flow or float. At the same time, sewage must be injected into the equipment (when there is no sewage, other water sources or tap water should be used instead), and the fullness must reach more than 70% to prevent the equipment from floating.
5. After the installation of rural sewage purification pool is completed, the gap can be filled with soil around the equipment and compacted. When leveling the ground, it should be noted that the manhole cover plate of the equipment must be about 50mm higher than the ground. Don't let mud block the air inlet on the manhole cover plate.
6. Connect the control line of the electric control cabinet to the equipment, and pay attention to the motor steering of the underwater aerator and submersible sewage pump when wiring. For example, the basement control cabinet should be placed in a ventilated place and kept dry. In general, the control cabinet cannot be placed in the open air. Avoid sun, rain, etc. In order to avoid the leakage of the control panel and connector, the control panel will be burned.
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