Interpretation
Buried wastewater treatment equipment is a modular high-efficiency wastewater biological treatment equipment, is a biofilm as the main body of the purification of wastewater biological treatment system, giving full play to the anaerobic biofilm filter, contact oxidation beds and other biofilm reactors have a high density of living organisms, pollution resistance, low power consumption, operation and operation of stable, easy maintenance features make the system has a wide range of applications and promotion value. Stable operation and maintenance is convenient, making the system has a wide range of application prospects and promotion value.
Working principle
Anaerobic biofilter introduction
1, the role of anaerobic biofilter principle
1), filtration: filler retention filtration of large particles in the feed water and suspended solids;
2), hydrolysis: Anaerobic microorganisms can hydrolyze large molecules of insoluble substances into small molecules of soluble substances;
3) Absorption: anaerobic microorganisms adsorb and absorb organic pollutants in the water, part of which is used for their own growth and reproduction, and part of which is in the form of methane gas through the U-type water seals;
4) Denitrification: the contact oxidation bed effluent flows back into the anaerobic filtration tank, which can be used to remove nitrogen from the water. The denitrifying bacteria in the anaerobic microorganisms can utilize the nitrate nitrogen in the return water and convert it into nitrogen to remove the nitrogen substances in the sewage.
Rural wastewater treated in an anaerobic filter reduces the concentration of suspended solids, organic pollutants, and nitrogen, and also reduces the subsequent load on the contact oxidation beds.
2, the role of the contact oxidation bed principle
1), adsorption: aerobic microorganisms in the filler growth and reproduction process of each other part of the formation of a larger surface area of the formation of a larger, higher concentration of biofilm, which can be a large number of adsorption of organic pollutants in the water most of the organic pollutants, so that pollutant concentrations are reduced;
2), ingestion, Decomposition: in the case of constant air to the reactor, aerobic microorganisms can adsorbed organic pollutants as nutrients into the body, metabolism, part of their own growth and reproduction, part of the conversion into carbon dioxide and water.
Contact oxidation beds make the concentration of organic pollutants in rural sewage further reduced, the effluent CODcr, BOD5 removal rate of more than 80%, can reach the national sewage discharge secondary standards.
3, the working principle of the sedimentation tank
1), the use of gravity to make the contact oxidation bed effluent specific gravity greater than the water of the suspended sludge sinking to the bottom of the pool, so as to make it removed from the water, to ensure that a better quality of effluent water;
2), settling to the bottom of the sludge and automatically return to the contact oxidation bed, to maintain the contact oxidation bed sludge concentration. sludge concentration in the oxidation bed.
4, disinfection pool By using solid chlorine to disinfect the effluent water, it can effectively kill bacteria, E. coli, viruses and other pathogenic microorganisms in the water, and the treated water is clear and transparent without odor, and the number of bacteria and the number of E. coli bacteria can be in line with the national standards for sewage discharge.
Equipment Features
Advantages:
There are many kinds of buried sewage treatment process, under the premise that the water meets the standard, the most prominent advantages are:
1. The equipment is buried under the surface of the ground, above which can be landscaped and the environment is beautiful.
2. The whole equipment generally does not require specialized management.
3. It can reduce the floor space, and a parking lot can be constructed above the equipment without the need to build plants and other facilities.
4. It has no impact on the surrounding environment, produces less sludge, and the noise level is less than the standard for Type II areas.
5. Easy operation, new technology, good effect, long service life.
6. The equipment can be arranged in accordance with the standard arrangement, and can also be specially arranged according to the needs of the terrain.
Disadvantages:
1. Not conducive to maintenance. It is not convenient to overhaul and replace the equipment after it fails. This is usually the most annoying for homeowners.
2. Adaptability to the environment, winter anti-freeze, summer flood prevention . The north needs to be buried deeper and insulated.
Conditions suitable for the use of buried sewage treatment equipment
Smaller amount of water , small concentration of pollutants, the composition is not complex, limited space, need to consider the surrounding environment beautification factors. Usually the above conditions are recommended to use buried sewage treatment system for treatment.
Equipment applications
1. living quarters, villas, office buildings
2. hotels, canteens, bathing centers
3. small and medium-sized factories
4. hospitals and small and medium-sized health care institutions
5. stations, airports, wharves, commercial streets
6. parks, attractions and ancient sites. Parks, scenic spots and other tourist attractions
7. Schools, armies, organizations
8. Other places with higher requirements for venues and environment.
Attached flow chart