Commodity name: Domestic Sewage Treatment Equipment for Highway Service Areas
Product Introduction:
The domestic sewage treatment equipment for highway service areas adopts the A/O (Anoxic/Oxic) biological treatment process. The Anoxic (A) stage involves anaerobic biological treatment, where facultative microorganisms use organic carbon sources as electron donors to convert NO₂-N and NO₃-N in sewage into N₂, achieving denitrification to eliminate nitrogen-induced eutrophication pollution while removing part of the organic matter.
The Oxic (O) stage is an aerobic biological treatment process designed to further oxidize and decompose organic matter. When carbonization tends to complete, nitrification proceeds smoothly. The O-stage tank mainly contains aerobic microorganisms and autotrophic bacteria (nitrifying bacteria): aerobic microorganisms decompose organic matter into CO₂ and H₂O; autotrophic bacteria (nitrifying bacteria) convert NH₃-N in sewage into NO₂-N and NO₃-N. A portion of the effluent from the O-stage tank is refluxed to the A-stage tank to provide electron acceptors, ultimately eliminating nitrogen pollution through nitrification.
Design Features:
The MJC series domestic sewage treatment equipment is installed underground, allowing the surface above to be used for greening or other purposes, with no need for dedicated buildings, heating, or insulation.
The A/O biological treatment process uses plug-flow biological contact oxidation, which outperforms fully mixed or two/three-stage series fully mixed biological contact oxidation tanks. It also has a smaller volume than activated sludge tanks, strong adaptability to water quality, excellent shock load resistance, stable effluent quality, and no sludge bulking. The tank is equipped with new elastic three-dimensional fillers, featuring a large specific surface area that facilitates microbial attachment and detachment. Under the same organic load, it achieves high organic matter removal efficiency and enhances the solubility of oxygen from air in water.
The A/O tank adopts biological contact oxidation with low volume load of fillers, keeping microorganisms in a self-oxidation stage and minimizing sludge production. Sludge discharge is only required once every 90 days or more (via suction and transportation by a sewage truck).
In addition to conventional noise reduction measures (such as vibration isolation pads and mufflers) for the blower, a sound attenuation device is installed at the inlet of the blower room, ensuring the equipment operates with noise below 50 dB(A), meeting quiet community standards and causing minimal impact on the surrounding environment.
The deodorization system of this underground domestic sewage treatment equipment combines conventional high-altitude exhaust with soil deodorization measures.
The entire treatment system is equipped with a fully automatic electrical control system and an equipment fault alarm system, ensuring safe and reliable operation. Routine management does not require dedicated personnel, with only occasional maintenance and upkeep needed.
