Nitrogen and phosphorus removal integrated biological reaction tank operating in multiple modes
A technology of biological reaction tank and multi-mode operation, applied in the field of integrated biological reaction tank for denitrification and phosphorus removal, can solve the problems of restricting the development of the sewage treatment industry, single operation mode, etc., to eliminate adverse effects, flexible and convenient switching, and the number of equipment less effect
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[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0028] like figure 1 As shown, the multi-mode denitrification and phosphorus removal integrated biological reaction pool provided by the present invention includes a biological selection zone 22, a pre-anoxic zone 23, a main reaction zone 24, a water distribution zone 25, a water outlet zone 26 and an internal return channel 27 .
[0029]The biological reaction tank is provided with a biological selection area 22 and a pre-anoxic area 23 in the front section. The water enters the biological selection area 22 from the water inlet pipe 1; the external return sludge enters the external return sludge channel 17 from the external return sludge pipe 3, and the external return sludge channel 17 is connected to the biological selection area 22 and extends to the pre-anoxic area 23. Set at least two regulating weir gates or flow and direction regul...
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