Sewage treatment method capable of realizing advanced nitrogen removal through combined biofilm process
A sewage treatment method and deep denitrification technology, applied in the field of sewage deep treatment, can solve problems such as limitations and insufficient organic carbon sources, and achieve the effect of improving utilization rate, weakening dependence, and promoting denitrification process
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[0029] A sewage treatment method for deep denitrification through a combined biofilm process, the process of which is as follows figure 1 As shown, the treatment mode of oxygen-limited biofilm reactor and anoxic biofilm reactor connected in series is adopted.
[0030] The structure of the oxygen-limited biofilm reactor is as follows: figure 2 As shown, from bottom to top, there are emptying pipe 7, mud collecting bucket 1, water distribution and air distribution chamber 2, cylindrical filter layer 4, and water outlet area 5; Wherein the water inlet pipe is connected with the filter water inlet pipe 9 and the recoil water inlet pipe 10, and the air inlet pipe is connected with the filter aeration pipe 12 and the recoil air pipe 13; the filter head 8 is arranged on the support layer 3; water pipe15.
[0031] The structure of the anoxic biofilm reactor is as follows: image 3 As shown, from bottom to top, there are emptying pipe 7, mud collecting bucket 1, water distribution ...
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