Device and method for treating low-temperature high-ammonia nitrogen wastewater by use of constant magnetic field
A constant magnetic field, high ammonia nitrogen technology, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of unstable operation of the reactor at low temperature, low nitrosation efficiency, substandard effluent, etc. Achieve the effect of shortening residence time, efficient nitrosation, and reducing power consumption
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Embodiment 1
[0027] Such as figure 1 As shown, the structure schematic diagram of the enhanced sewage treatment device using changing magnetic fields includes: two magnets 10 are arranged symmetrically outside the short-path nitrification SBR reactor 1, and the two magnets 10 form a horizontal magnetic field in the reactor; the short-path nitrification SBR reactor 1 is connected to Sewage pipes, drain pipes, sludge discharge pipes, aeration pipes, and lye inlet pipes; a peristaltic pump 3 is installed on the sewage pipe; a water outlet valve 4 is installed on the drain pipe; a sludge discharge valve 6 is installed on the sludge discharge pipe; The lye inlet valve 11 is set on the liquid inlet pipe; the sewage tank 2 is connected to the short-range nitrification SBR reactor 1 through the sewage pipe; the reactor outlet water enters the outlet tank 5 through the drain pipe; the aeration pump 3 is connected to the short-range nitrification reactor through the aeration pipe SBR reactor 1; the ...
Embodiment 2
[0034] Taking the high ammonia nitrogen wastewater of a sewage plant as the research object (pH=8.0, COD=570mg / L, NH 4 + -N=960mg / L), its waste water treatment step is
[0035] (a) design square short-range nitrification SBR reactor 1, the height of this reactor: length: width=4: 2: 1, fill activated sludge in this reactor 1, form activated sludge zone at its bottom; Then Symmetrically installed on both sides of the reactor 1, the magnetic medium is mainly composed of BaFe 12 o 19 and SrFe 12 o 19 ferrite magnet 10, keep the two magnets 10 relatively parallel, design the area of the magnet 10 so that the activated sludge area is in the range of the magnetic field, and indicate the magnetic field strength through the magnetic field measuring instrument 15, and the upper and lower ends of the magnet 10 are respectively fixed on the fixed The position on the board and on the board is adjustable, and the distance between the two magnets 10 is adjusted so that the central fi...
Embodiment 3
[0040] The sewage treatment device of the present embodiment 3 is the same as that of the embodiment 1, and its difference is that the neutral magnetic field strength of the reactor is controlled to be 100mT, and the high ammonia nitrogen waste water of a certain sewage plant is the research object (pH=7.7, COD=730mg / L, NH 4 + -N=1150mg / L), its waste water treatment step is
[0041] (a) Inoculate activated sludge under the low temperature condition of 15°C, the sludge concentration is 4000mg / L, the waste water is pumped into the reactor 1 through the peristaltic pump 3 every cycle, the influent volume is 20% of the effective volume of the reactor, and then gradually Increase to 50%, carry out continuous aeration and stirring during the reaction period, the stirring speed is 250r / min, so that the activated sludge is in a suspended state, the aeration time is 300min, and the sedimentation is 50min. After sedimentation, open the outlet valve 4 to drain water, and the drainage ra...
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