Overview buried sewage treatment equipment is a modular and efficient biological wastewater treatment equipment, is a biofilm in order to purify the body of biological wastewater treatment system, give full play to the anaerobic biofilter, contact oxidation bed biofilm reactor has a biological density, high tolerance, low power consumption, operation stable, easy maintenance features, making the system has very broad application prospects and promotional value. About an anaerobic filter, anaerobic biofilter action principle 1), filter effects: water filtration filler retention of large particulate matter and suspended solids; 2), hydrolysis: anaerobic microorganisms can be macromolecules hydrolysis of insoluble material into the soluble material of small molecules; 3), absorption: anaerobic adsorption, absorption of organic pollutants in water, for its own part of the growth and reproduction, partly in the form of biogas through a U-shaped seal ; 4), denitrification: the contact oxidation bed effluent returned to the anaerobic filter, anaerobic microorganisms denitrifying bacteria can use nitrate reflux into the water and nitrogen to remove nitrogen substances in wastewater . After the sewage treatment by anaerobic filter, reducing suspended solids, organic pollutants and nitrogen concentration, but also reduces the subsequent contact oxidation bed load. 2, contact oxidation bed action principle 1), adsorption: the process of aerobic microorganisms multiply the surface area of ??each other to form a larger portion of the junction, a higher concentration of biofilm growth on the packing can be a lot of most of the adsorption of organic pollutants , so reducing the concentration of pollutants; 2) uptake, decomposition: In the case of the reactor through the air constantly under aerobic microorganisms may be organic pollutants adsorbed in the human body as a nutrient intake, metabolism, one for their growth and reproduction, a portion is converted to carbon dioxide and water. Contact oxidation bed rural wastewater to further reduce the concentration of organic pollutants in the effluent CODcr, BOD5 removal rate reached 80%, secondary effluent can meet the national standards. 3, the working principle of a sedimentation tank), the use of gravity to make contact with a specific gravity of water oxidation bed suspended sludge than water sink to the bottom, so that's removed from the water to ensure good water quality; 2), settlement to the sludge at the bottom and automatically return to the contact oxidation bed, in order to maintain contact oxidation bed sludge concentration. 4, through the use of solid chlorine disinfection of pool water disinfection, can effectively kill bacteria, E. coli, viruses and other pathogenic microorganisms, the treated water is clear and transparent, no odor, bacteria and E.coli can meet the national effluent standards. Advantages: a device buried under the surface, the above can be green and beautiful environment. 2 generally do not need someone to manage the entire device. 3 can reduce the area before the construction of parking lots on the device, without the need to build factories and other facilities. 4 had no effect on the surrounding environment, produce less sludge, noise is less than the standard second-class areas. 5 simple, new technology, effective, long service life. 6. Equipment according to the standard layout, but also with the terrain requires special arrangements. Disadvantages: (1) is not conducive to the maintenance, equipment failure, convenient maintenance and replacement. This is usually the owners of the most troubling. 2 environmental adaptability, winter frost, summer flood protection. Northern buried deeper needs and make thermal insulation. Under what conditions suitable for buried sewage treatment equipment? A small amount of water, a small concentration of pollutants, ingredients are not complicated, limited space, consider the factors surrounding landscaping. Under the above circumstances is usually recommended buried sewage treatment system. Scope 1. Living quarters, villas, office buildings 2. Hotels, canteens, bath 3. Small and medium factories 4. Hospitals and medical institutions, small and medium 5. Stations, airports, docks, commercial district 6. Parks, historical sites and other tourist landscape District 7 schools, the military, institutions 8. others on the site, the environment require a higher place. Welcomes all successful people need to come to order!