A device for denitrification of urban sewage and its application
A technology for denitrification of urban sewage, applied in the field of sewage biological denitrification treatment, can solve the problems of low activity of nitrosifying bacteria and unsatisfactory removal of ammonia nitrogen, etc., and achieve the effect of uniform water inflow and aeration
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Embodiment 1
[0034] This embodiment relates to a biofilm Canon urban sewage denitrification device based on an adsorption carrier, and its specific structure is as follows figure 1 :
[0035] Comprising a sewage treatment container 11 and adsorption carrier particles 3 filled in the sewage treatment container 11, a water inlet 1 and an air inlet 12 are provided at the bottom of the sewage treatment container, and a water inlet 1 and an air inlet 12 are arranged at the top of the sewage treatment container 11 There are water outlets 6 and air outlets 5, and anammox bacteria and nitrosative bacteria grow on the adsorption carrier particles.
[0036] In this embodiment, the anammox bacteria grow attached to the adsorption carrier particles, and the nitrosating bacteria grow attached to the anammox bacteria, and the two form a structure of inner and outer layers.
[0037] In this embodiment, the adsorption carrier particles are D113 type macroporous resin with a particle diameter of 1.0 mm. ...
Embodiment 2
[0041] This embodiment relates to a biofilm Canon urban sewage denitrification device based on an adsorption carrier. Its specific structure is as follows: Compared with Embodiment 1, the difference is that: figure 1 shown
[0042] The sewage treatment container is preferably a cylindrical pipe, and a plurality of sampling ports 4 , pH monitors 7 and dissolved oxygen monitors 8 are provided at different heights of the wall.
[0043] The water inlet is connected with a water pump (not shown), and the air inlet 12 is connected with an air pump 10 .
[0044] A gas flow meter 9 is connected between the air inlet 12 and the air pump 10 .
Embodiment 3
[0046] The specific application of the biofilm Canon urban sewage denitrification process based on the adsorption carrier involved in this embodiment, the steps are as follows:
[0047]1) Add the sludge containing AnAOB and AOB functional bacteria from the upper part of the reactor to the reactor filled with D113 macroporous resin, promote the uniform mixing of microorganisms and carrier particles through water inflow and aeration disturbance, and cultivate About 2 months, until two kinds of functional bacteria successfully grow on the macroporous resin.
[0048] 2) Take the sewage whose influent ammonia nitrogen concentration is (30±10)mg / L and influent COD concentration is (30±10)mg / L, and pass it into the sewage treatment system. The hydraulic retention time (HRT) of the system is 4h. DO is controlled at 0.5-1.0 mg / L, and pH is controlled at 6.8-7.6. The concentration of ammonia nitrogen in the effluent of the system is (4.5±2.9) mg / L, which meets the first-level A standar...
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Abstract
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