If it is a general difficult wastewater, using the inflow aeration biofilter can be solved, if the special wastewater, the available inflow aeration biofilter + microbial generator is currently the best biochemical treatment method.
A, inflow aeration biofilter
You know that the process of sewage treatment is mainly biochemical treatment, common processes are contact oxidation, AB method, A/O method, oxidation ditch, SBR, aeration biofilter, inflow aeration biofilter, wastewater treatment is the first inflow aeration biofilter,
Influence aeration biofilter is the independent intellectual property rights of China's new wastewater treatment process. Sewage treatment process, according to the subsequent treatment process, it is divided into: hydrolysis - conduction aeration biofilter, anaerobic - conduction aeration biofilter, air flotation - conduction aeration biofilter, fast sinking - conduction aeration biofilter, ultrasonic - conduction aeration biofilter, microwave - conduction aeration biofilter, ozone - conduction aeration biofilter and so on.
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 to obtain a 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 In 2009, it was listed as "Innovative Project"; in December of the same year, it was listed as "Environmental Protection Technology Encouraged by the State"; in 2010, it was listed as "National Key New Product"; and in 2012, it was listed as "National Key New Product"; and in 2012, it was listed as "National Key New Product". 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
Conductive aeration biofilter is a typical high-load, submerged, immobilized biological bed of three-phase conduction, denitrification and phosphorus removal reactor, in the absence of increased investment in the premise of the treated wastewater is better than the discharge standard, to achieve the water reuse water quality, and therefore technologically forward-looking.
(2), process innovation
Conductive aeration biofilter so that the sewage in the same treatment pool, to solve other sewage treatment requires four pools to complete the process. The entire operation has no idle. Therefore the process innovative.
(3), engineering investment economy
Conductive aeration biofilter BOD5 volume load is 5 to 10 times the conventional secondary biological treatment, and two aeration tanks, two sedimentation tanks, two filtration tanks into one, 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 treatment effect stability.
(5), the simplification of the treatment process
Conductive aeration biofiltration can be after the sewage, without the need for deep treatment facilities and equipment under the conditions of water reuse water quality, so the treatment process is simplified.
(6), the operating costs of the economy
Conductive aeration biofiltration using filter media cutting, blocking, crushing bubbles, strengthen the gas and liquid mass transfer effect, increase the contact area and time of microorganisms and air, greatly improve the oxygenation rate, reduce power consumption, so the operating costs of the economy.
(7), operation and management simplicity
Conductive aeration biofilter adopts PLC to realize program-controlled operation, i.e., through the liquid level sensing and equipment chain, so that there is sewage automatic startup, no sewage automatic shutdown; through the dissolved oxygen detector frequency converter chain, 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 judgement, etc., so the Simplicity of operation and management.
(8), denitrification and phosphorus 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 is nitrified twice, can be removed to the ammonia nitrogen to 3mg / L below the lowest of less than 0.068mg / L, so the denitrification typicality.
The phosphorus removal of the inflow aeration biofilter is produced in the inner cone, and the outer cone of the two aerobic section of the polyphosphorus bacteria, which can take up a large amount of dissolved phosphorus, 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, so the phosphorus removal is typical.
Conductive aeration biofilter effectively solves the BAF (aeration biofilter), denitrification effect is good, phosphorus removal effect is poor technical difficulties. At the same time also solved the A2 / O in the second sedimentation tank N2 attached sludge floating, precipitation effect is not ideal. Increase the reduction potential of the secondary sedimentation tank increases, resulting in phosphorus release, phosphorus removal effect is not satisfactory and other technical difficulties.
(9), temperature and mode of operation adaptability
Conductive 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, into the water very soon after normal operation. Therefore the temperature and operation mode adaptability.
(10), maintenance and replacement convenience
Conductive aeration biofilter main rotating equipment placed on the ground, coupled with 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
Conductive aeration biofilter is a modular structure, can be designed centrally, can also be designed separately, is conducive to the expansion of the project, can be better adapted to the landscape of each region, for the upgrading of the old sewage treatment works are also time favorable.
Microbial generator,
Second, microbial generator
Aerobic is also essential to the main unit of the sewage treatment process. Due to the slow growth of microorganisms in the aerobic tank, designers often use to increase the aerobic tank, increase the residence time of wastewater in the aerobic tank, used to make up for the shortcomings of the conventional aerobic method. But increase the volume of aerobic tank, increase the investment in aeration tank, it is difficult to solve the common aerobic treatment defects, the reason is also mainly spring, summer, fall, winter and other climatic conditions, so that the temperature of the sewage changes, as well as sewage in the H2S, Cl-, NH3-N, and other factors, resulting in the inhibition of aerobic microorganisms. Aerobic microbial generator adopts three-stage occurrence, alternate operation, step by step derivation, logarithmic growth technology, can occur in 24 hours 72 generations of different types of high-density dominant microbial flora, these high-density microbial groups released into the aeration tank under the action of jet stream, can quickly decompose the pollutants in the water into CO2 and H2O, thus reducing the volume of the aeration tank, greatly reducing the investment in the aeration tank, and does not By spring, summer, fall, winter and other climatic conditions, sewage temperature changes, as well as sewage H2S, Cl-, NH3-N and other factors, is the ideal anaerobic enhanced treatment equipment.