High-efficiency culture method of urban domestic sewage nitrosation granule sludge
A technology for urban domestic sewage and nitrosation particles, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor treatment capacity, low sludge load, and sludge particles The problem of low degree of
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[0024] A columnar batch batch reactor with an effective height of 80 cm and an inner diameter of 8 cm was used in the test, with a height-to-diameter ratio of 10, and the temperature inside the reactor was controlled at 20±1°C by a water bath. The operation mode of each cycle of the reactor is water intake, aeration, sedimentation, and drainage. It operates 4 cycles a day. The water intake is urban domestic sewage, the C / N is 3.7-5.4, and the aeration rate is controlled at 2.0L / min. At this time, the superficial gas velocity is 0.66cm / s, and the aeration time is controlled so that the ammonia oxidation rate is 80-90%.
[0025] 0-14d is the start-up stage of nitrification, inoculate ordinary nitrification sludge in the aeration tank of urban sewage treatment plant, the sludge concentration after inoculation is 3.57g / L, add ammonia nitrogen and sodium bicarbonate to domestic sewage, and feed NH 4 + -N is 161-177mg / L, COD is 242-260mg / L, and the alkalinity is CaCO 3 It is calcu...
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