If you really want a good environmental protection company to treat sewage, you should first choose technology and products, not manufacturers. Therefore, it is recommended that diversion aerated biological filter be the first choice.
The diversion aeration biological filter is a new sewage treatment process with independent intellectual property rights in my country. According to the different subsequent treatment processes, it is divided into: hydrolysis-diversion aeration biological filter, anaerobic- Diversion aeration biological filter, air flotation-diversion aeration biological filter, rapid sedimentation-diversion aeration biological filter, ultrasonic-diversion aeration biological filter, microwave-diversion aeration biological filter , ozone-diversion aeration biological filter, etc.
The diversion aerated biological filter combines with other processes in the upgrading and transformation of old sewage treatment projects, nitrogen and phosphorus removal, and reclaimed water reuse to develop the AB method - diversion aerated biological filter; A/O method - diversion aeration biological filter; A2/O method - diversion aeration biological filter; oxidation ditch - diversion aeration biological filter; SBR - diversion aeration biological filter; biological contact oxidation -Diversion aeration biological filter and other advanced treatment processes.
The diversion aerated biological filter fully draws on the aerated biological filter method, contact oxidation method, biofilm method, interstitial aeration method, artificial rapid filtration method, sedimentation separation method, nitrification and denitrification method , water supply rapid filtration method and other eight design techniques, and new sewage treatment processes and technologies developed by combining secondary or tertiary sewage treatment processes. Obtained national patent in 2005.
There are engineering examples of diversion aerated biological filters in Beijing, Shandong, Hebei, Guizhou, Shanxi, Sichuan, Inner Mongolia, Heilongjiang, Jiangsu, Jilin, Henan, Hubei, Tianjin, Xinjiang and other places in my country. , the cases involve sewage treatment in the fields of life, hospitals, chemical industry, slaughter, food, flax, alcohol, pharmaceuticals, mustard and other fields. A large number of applications have proved that: the effluent water quality CODcr is generally below 20mg/L, with a minimum of 5.95mg/L; BOD5 is generally below 10mg/L, with a minimum of 3.50mg/L; SS is generally below 20mg/L, with a minimum of 6.55mg/L.
The diversion aerated biological filter allows sewage to be aerated twice, sedimented twice, and filtered twice in the same treatment tank, solving other sewage treatment processes that require four tanks to complete. Especially under the condition of continuous water inflow, intermittent aeration and activated sludge return are achieved, and the entire operation is not idle. Its advantages are more prominent than other treatment methods, and the treatment effect is particularly significant. It was listed as an "innovation project" in 2009; in December of the same year, it was listed as an "environmental protection technology encouraged by the state"; in 2010, it was listed as a "national key new product"; in 2012, it was listed as a "national key new product" during the 12th Five-Year Plan period. The state has increased investment in recommending and encouraging the development of environmental protection technologies in urban, rural, industrial, aquaculture, urban sewage treatment plant upgrading, nitrogen and phosphorus removal, and reclaimed water reuse.
(1). Forward-looking technology
The diversion aerated biological filter is a typical high-load, submerged, fixed biological bed three-phase diversion. The nitrogen and phosphorus removal reactor can make the treated sewage better than the discharge standard and reach the quality of reclaimed water without increasing investment, so the technology is forward-looking.
(2). Process innovation
The diversion aerated biological filter puts the sewage in the same treatment tank, solving other sewage treatment processes that require four tanks to complete. There was no idleness throughout the run. Therefore the process is innovative.
(3) Project investment economy
The BOD5 volume load of the diversion aerated biological filter is 5 to 10 times that of conventional secondary biological treatment, and the two aeration The gas tank, two sedimentation tanks, and two filter tanks are integrated into one, so the project investment is economical.
(4) Stability of treatment effect
The diversion aerated biological filter has nitrification and denitrification functions. There is no concern about sludge expansion and is not affected by hydraulic load. Therefore, the processing effect is stable.
(5) Simplification of the treatment process
Diversion aeration biological filtration can treat the wastewater and achieve reclaimed water reuse without the need for advanced treatment facilities and equipment. water quality, thus simplifying the treatment process.
(6) Economical operation cost
The diversion aerated biological filter uses filter materials to cut, block and finely crush air bubbles, strengthen the gas and liquid mass transfer effect, and increase the interaction between microorganisms and The air contact area and time greatly improve the oxygenation rate and reduce power consumption, so the operating cost is economical.
(7). Simplicity of operation and management
The diversion aeration biological filter adopts PLC to realize program-controlled operation, that is, through liquid level sensing and equipment interlocking, there is no sewage. It starts automatically and stops automatically when there is no sewage; it realizes the aeration volume adjustment through the frequency converter interlocking of the dissolved oxygen meter; it realizes remote monitoring through moneyless transmission to achieve the purposes of water quality monitoring, fault diagnosis, etc., so the operation and management are simple.
(8) Typical denitrification and phosphorus removal
Through the autotrophic bacteria (such as nitrifying bacteria) in the lower part of the inner cone and the upper part of the outer cone, the ammonia nitrogen is removed. Two nitrifications can remove ammonia nitrogen to less than 3 mg/L, and the lowest is less than 0.068 mg/L, so the denitrification is typical.
The phosphorus removal in the diversion aerated biological filter is based on the phosphorus-accumulating bacteria produced in the two aerobic sections of the inner cone and the outer cone. After the cone bottom of the gas biological filter settles, the mud is discharged very smoothly, so the phosphorus in the effluent is generally less than 0.5mg/L, with the lowest reaching 0.08mg/L, so phosphorus removal is typical.
The diversion aerated biological filter effectively solves the technical problems of BAF (Biological Aerated Filter), which has good nitrogen removal effect but poor phosphorus removal effect. At the same time, it also solves the problem of A2/O floating on the sludge attached to N2 in the secondary sedimentation tank, and the sedimentation effect is not ideal. Increasing the reduction potential of the secondary sedimentation tank increases the technical problems such as phosphorus release and unsatisfactory phosphorus removal effect.
(9), adaptability to temperature and operation mode
The diversion aerated biological filter can operate normally between 1℃-50℃ and is not affected by geographical and climatic conditions. It is suitable for both the south and the north. In addition, a large number of microorganisms will not be lost, and the activity of its strains can be maintained even if it is not operated for a long time. It will operate normally after entering the water, so it is adaptable to temperature and operation mode.
(10) Convenience of maintenance and replacement
The main rotating equipment of the diversion aeration biological filter is placed on the ground. In addition, it uses domestic equipment and is fault-free. The alarm system makes it easy to repair and replace parts.
(11) Flexibility of project construction
The diversion aeration biological filter tank has a modular structure and can be designed centrally or separately, which is conducive to the upgrading and expansion of the project. It can better adapt to the landforms of various regions and is also beneficial for upgrading old sewage treatment projects. If you look for a diversion aerated biological filter online, you can find the best manufacturer.