Method for rapidly starting short-cut nitrification of domestic sewage
A technology of domestic sewage and short-range nitrification, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effect of easy implementation, strong operability and stable operation effect.
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Embodiment 1
[0047] The domestic sewage short-range nitrification system 2 adopts a sequencing batch reactor, which is made of plexiglass, with an effective volume of 6L and a drainage ratio of 50%. , release the air with a microporous aeration hose. The water is fed by the micro submersible sewage pump (inlet pump 3), and the water is discharged by the electric ball valve (drain valve 7), which is automatically controlled by the time-controlled switch.
[0048] The inoculated activated sludge comes from the biological reaction tank of a municipal sewage treatment plant. After several washes, the recovered sludge is inoculated into the domestic sewage short-range nitrification system 2, and the sludge concentration is about 3000mg / L. During operation, the temperature was a low temperature of 8 to 16°C, and the pH was 7.0 to 8.5.
[0049] During the test, the actual domestic sewage was used, and the water quality characteristics are shown in Table 1:
[0050] Table 1 Water quality charact...
Embodiment 2
[0057] The experimental system parameters and environmental conditions are the same as those in Example 1.
[0058] After the activity of the sludge is restored to the normal level by aeration, under the condition of low temperature, the domestic sewage is sent from the domestic sewage raw water tank 1 through the inlet pump 3 into the domestic sewage short-range nitrification system 2, and at the same time, the domestic sewage is sent to the domestic sewage short-range nitrification system 2. Add ferric chloride inside, according to 145mgFeCl 3 / g MLSS (mixed liquid sludge concentration) was added, and the total added mass of ferric chloride was 2.8g.
[0059] After the water inflow ends, turn on the aeration pump 4, and control the dissolved oxygen at 8 mg / L through the flow meter 5; the single-cycle operation mode is as follows: the total cycle time is 360 minutes; the water inflow time is 5 minutes, and the water inflow flow rate is 1.5L / min; 240min, the aeration rate is ...
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