A light-type reaction device for treating low c/n sewage and its operation method
The technology of a reaction device and operation method, applied in the field of light-type reaction devices, can solve the problems of difficult deep denitrification of low C/N sewage, and achieve the effects of reducing sludge treatment costs, high affinity, and high removal rate
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Embodiment 1
[0040] Such as Figure 1 to Figure 5 As shown, it is a light-type reaction device for treating low C / N sewage provided by this embodiment, which includes a reactor box 13 . In this embodiment, the box body 13 is a rectangular parallelepiped. It can be understood that the shape of the box is not limited to a rectangular parallelepiped, and can also be other shapes, which are mainly determined according to actual needs. The inside of the reactor box 13 is divided into an upper layer illumination area 14 and a lower layer functional area 15 . The upper floor lighting area 14 is divided into a plurality of corridors by the partition wall 1 . In this embodiment, the number of corridors is four. The outlet water at the process end of each corridor flows into the next adjacent corridor through the set flow holes 2 . The end of the last corridor is provided with a water outlet area 3. The water outlet area 3 adopts submerged outflow, and the water flowing into the water outlet are...
Embodiment 2
[0051] Adopt the device and the method of embodiment 1, be used for the deep denitrification treatment of common secondary bioreactor effluent, therefore, test sewage simulates the preparation of effluent water quality of the secondary settling tank of a certain sewage treatment plant in Wuhan City, the main water quality index of influent: Ammonia nitrogen (NH 4 + ‐N) is 9mg / L, and the chemical oxygen demand (CODcr) is 50mg / L. The hydraulic retention time of the upper light zone 14 is controlled at 4 hours, the SRT is 12-20 days, the pH is between 7.4-7.6, and the dissolved oxygen is between 0.4-0.6 mg / L. The hydraulic retention time of each cell in the lower multi-functional combination area 15 is about 2 hours, and the short-range nitrosation area turns on the side wall lighting 7, and its SRT is also 12-20d. The pH is between 7.6-7.9, and the dissolved oxygen is between Between 0.3 and 0.5mg / L. The ammonia nitrogen of the treated wastewater decreased to 0.73mg / L, the av...
Embodiment 3
[0053] The device and method of Example 1 were used for the deep denitrification treatment of landscape water, and the test water came from the landscape water of Nanhu Lake in Wuhan. The main water quality indicators of the water: ammonia nitrogen (NH 4 + ‐N) is 3.3mg / L, TN is 3.8mg / L, and chemical oxygen demand (CODcr) is 28.8mg / L. The hydraulic retention time of the upper light zone 14 is controlled at 4 hours, the sludge age is 18 days, the measured pH is about 7.6, and the value of dissolved oxygen is about 0.52mg / L. The hydraulic retention time of each cell in the lower multi-functional combination area 15 is about 1.5h, and the short-range nitrosation area turns on the side wall lights, and its sludge age is also 18d. Its pH is measured to be about 7.7, and its dissolved oxygen is 0.3mg / L. The ammonia nitrogen of the treated wastewater decreased to 0.35mg / L, the average concentration of TN decreased to 0.47mg / L, the average concentration of COD was 18.9mg / L, the remo...
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Abstract
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