A method for treating ammonia nitrogen sewage by combining microbial carrier and fluidized bed
A microbial carrier and fluidized bed technology, applied in the direction of biological treatment devices, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of restricting wide application, large one-time investment, high operating cost, etc., and achieve improved removal efficiency , uniform contact and fast mass transfer
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specific Embodiment approach
[0017] refer to figure 1 , the specific embodiments of the present invention are as follows:
[0018] A method for treating ammonia-nitrogen sewage by combining a microbial carrier and a fluidized bed, in which the high-ammonia-nitrogen sewage to be treated in a pool (5) is pumped into the bottom of a circulating fluidized bed (1) through a water pump (6), and the sewage flows upwards The method operates in the reactor, and the nitrifying bacteria carrier (2) is placed in the reactor as a filler, and the residence time of the sewage in the circulating fluidized bed (1) is 5 to 12 hours, so that the ammonia nitrogen in the sewage is nitrified by the nitrifying bacteria carrier. The reaction is converted into nitrite nitrogen and nitrate nitrogen is removed, and the treated water is discharged from the upper part of the circulating fluidized bed (1). Furthermore, the above-mentioned treated water flows into a denitrification tank (8) through the water outlet pipe (7), and the ...
specific Embodiment
[0025] The nitrifying bacteria carrier in the present invention is made of polyvinyl alcohol, sodium alginate, silicon dioxide, boric acid, aluminum oxide, sodium bicarbonate, nitrifying bacteria and water. Among them, the mass ratio of polyvinyl alcohol, sodium alginate, silicon dioxide and water is 5-8:0.3-0.6:0.4-0.8:100, heated and stirred evenly, then cooled to below 45°C, and 1-5kg of nitrifying bacteria were added, After mixing evenly, drop it into the stationary solution through a droplet granulator to form a spherical carrier. The mass ratio of boric acid, aluminum oxide and water in the stationary solution is 10-15:0.5-1:250, mix evenly until completely dissolved, and then use Sodium bicarbonate adjusted its pH to 4. Finally, place the spherical carrier and fixative at 0-15°C for more than 12 hours to obtain the nitrifying bacteria carrier. Specific examples are as follows:
[0026] Table 1 Nitrifying bacteria carrier formula
[0027]
[0028]
[0029] In th...
Embodiment 6
[0031]Embodiment 6: preparation 500ml ammonia nitrogen concentration is the solution of 300mg / L, is placed in the graduated cylinder of 500ml, an aeration head is placed at the bottom, and adding mass ratio is 20% embodiment 1, control DO is 4~5mg / L, The water temperature was 20°C, the aeration was stopped after 8 hours, and the supernatant was taken for detection and analysis.
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