Conductive aeration biofilter in the old sewage treatment project upgrading, nitrogen and phosphorus removal, water reuse and other processes, the development of AB method - conductive aeration biofilter; A/O method - conductive aeration biofilter; A2 / O method - conductive aeration biofilter; oxidation ditch - conductive aeration biofilter; SBR - conductive aeration biofilter; biological contact oxidation - conductive aeration biofilter Bio-contact oxidation-conducted aeration biofilter and other deep treatment processes.
Conductive aeration biofilter fully draws on the aeration biofilter method, contact oxidation, biofilm method, gap aeration method, artificial fast filtration, sedimentation and separation method, nitrification back to nitrification method, fast filtration of water, such as the design of eight, and combined with the secondary or tertiary wastewater treatment process and the development of a new wastewater treatment process, a new technology. 2005 won the National Patent.
Conductive aeration biofilter in China's Beijing, Shandong, Hebei, Guizhou, Shanxi, Sichuan, Inner Mongolia, Heilongjiang, Jiangsu, Jilin, Henan, Hubei, Tianjin, Xinjiang and other places there have been examples of engineering cases, cases involving life, hospitals, chemical industry, slaughtering, food, linen, alcohol, pharmaceuticals, pickled vegetables and other areas of sewage treatment. A large number of applications have proved that: the effluent water quality CODcr is generally below 20mg/L, the lowest 5.95mg/L; BOD5 is generally below 10mg/L, the lowest 3.50mg/L; SS is generally below 20mg/L, the lowest 6.55mg/L.
Infiltration aeration biofiltration tanks so that the sewage in the same treatment tank, to complete the two times of aeration, two times of sedimentation, two times of filtration, to solve the other sewage treatment During the 12th Five-Year Plan period, the state has invested more in the upgrading of urban, rural, industrial, aquaculture, and municipal wastewater treatment plants, denitrification and phosphorus removal, water reuse and other fields to recommend the use of environmental protection technology and encourage the development of. Has the following advantages:
(1), technological foresight
Directed aeration biofilter is a typical high-load, submerged, immobilized biological bed of three-phase infusion, denitrification and phosphorus removal reactor, in the absence of increased investment in the premise of the treated wastewater to achieve the recycling of water reuse, and therefore, technological foresight.
(2), process innovation
Conductive aeration biofilter so that the sewage in the same treatment tank, to solve other sewage treatment requires four pools to complete the process. The whole operation without idleness. Therefore, the process is innovative.
(3), engineering investment economy
The BOD5 volume load of the inflow aeration biofilter is 5 to 10 times of the conventional secondary biological treatment, and two aeration tanks, two sedimentation tanks, two filtration tanks are combined into a single tank, therefore, engineering investment economy.
(4), the stability of the treatment effect
Conductive aeration biofilter with nitrification, denitrification function, there is no sludge expansion concerns, not subject to the impact of the hydraulic load, so the stability of the treatment effect.
(5), the simplification of the treatment process
Conductive aeration biofiltration can be after the sewage treatment, in the absence of deep treatment facilities and equipment under the conditions, to achieve the water reuse water quality, therefore, the treatment process is simplified.
(6), the operation cost economy
Conductive aeration biofiltration using filter media cutting, blocking, crushing bubbles, to strengthen the gas and liquid mass transfer effect, increase the contact area and time between microorganisms and air, greatly improve the oxygenation rate, reduce power consumption, therefore, the operation cost economy.
(7), operation and management simplicity
The inflow aeration biofilter adopts PLC to realize program-controlled operation, i.e., through the liquid level sensing and equipment chaining, so that there is sewage automatic startup, no sewage automatic shutdown; through the dissolved oxygen meter frequency converter chaining, to realize the adjustment of aeration; through the money transmission, to realize the remote monitoring and control to achieve the purpose of monitoring the quality of water, fault judgment, etc., so that the operation and management is simple. Operation and management simplicity.
(8), denitrification and phosphorus removal typicality
Through the lower part of the inner cone, and the upper part of the outer cone of the autotrophic bacteria, such as nitrifying bacteria, so that the ammonia nitrogen by the nitrification of the two times, can be taken off ammonia nitrogen to 3mg / L or less, the lowest of the lowest is less than 0.068mg / L, and therefore denitrification typicality.
The phosphorus removal of the inflow aeration biofilter is produced in the inner cone and outer cone of the two aerobic section of the polyphosphorus bacteria, can be a large amount of dissolved phosphorus intake, and through the inflow aeration biofilter cone bottom settlement, very smooth sludge discharge, so the phosphorus in the effluent water is generally less than 0.5mg/L, the lowest to 0.08mg/L, therefore, the removal of phosphorus typicality.
(9), temperature and mode of operation adaptability
Infiltration aeration biofilter can operate normally between 1 ℃ -50 ℃, not affected by geographic and climatic conditions, applicable to the south, but also suitable for the north, coupled with a large number of microorganisms will not be lost, even if a long period of time does not run to maintain the activity of its strains of bacteria, into the water very soon after normal operation. Therefore, the temperature and operation mode adaptability.
(10), maintenance and replacement convenience
The main rotating equipment of the infiltration aeration biofilter is placed on the ground, plus the use of domestic equipment, and there is a failure to determine the alarm system, so maintenance and replacement convenience.
(11), engineering and construction flexibility
The inflow aeration biofilter is a modular structure, can be designed centrally or separately, which is conducive to the expansion of the project, and can be better adapted to the geomorphology of various regions, and is also advantageous for the upgrading of the old sewage treatment works.
Therefore, the deep treatment of sewage often uses inflow aeration biofilter is more economical and reasonable.