A device and method for simultaneously removing cod-n-p in an anaerobic biofilm reactor based on iron minerals
A COD-N-P, biofilm reactor technology, used in chemical instruments and methods, anaerobic digestion treatment, biological water/sewage treatment, etc., can solve the problem of limited removal of phosphorus elements, difficult to achieve in engineering, and low phosphorus emission standards and other problems to achieve the effect of preventing sludge loss, reducing scale and reducing loss
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Embodiment 1
[0029] Such as figure 1Shown, a kind of anaerobic biofilm reactor based on iron mineral synchronously removes the device of COD-N-P, comprises the biofilm reactor 15 of sealing, is filled with ferric mineral and seeding sewage in the described biofilm reactor 15 The mud 8 is also equipped with a submerged hollow fiber microfiltration membrane module 9, the biofilm reactor is provided with a water inlet, and the submerged hollow fiber microfiltration membrane module is provided with a water outlet, and the water inlet passes through the water inlet pipe 2 and the water inlet The self-priming pump 3 is connected to the sewage tank 1, and the water outlet is connected to the water outlet self-priming pump 14 and the water outlet flowmeter 13. The biofilm reactor is also provided with an automatic electric heating element 4, a monitoring / control element 6, and a dissolved oxygen measuring instrument 7. The monitoring / control element 6 and the dissolved oxygen measuring instrument ...
Embodiment 2
[0031] A method for synchronously removing COD-N-P in an anaerobic biofilm reactor based on iron minerals, in which the sewage in the sewage tank 1 is pumped into the biofilm reactor 15 through the water inlet pipe 2 through the water inlet self-priming pump 3 . Its effective volume is 100cm × 50cm × 20cm, and the total area of the hollow fiber membrane is 0.6 m 2 , filled with 0.8 kg of goethite with a particle size of about 20 microns and 1.2 kg of inoculated sludge, and the flow rate of injected sewage was controlled at 3 kg·COD·M -3 d -1 And the COD concentration in the initial water is 400 mg / L, the ammonia nitrogen concentration is 40 mg / L, and the total phosphorus concentration is 10 mg / L. The automatic electric heating element 4 keeps the water temperature in the sewage treatment area within the range of 34±1°C, the detection / control element 6 and the dissolved oxygen measuring instrument 7 monitor the change of the oxygen content in the sewage treatment area in rea...
Embodiment 3
[0035] A method for synchronously removing COD-N-P in an anaerobic biofilm reactor based on iron minerals, the sewage containing COD concentration of 500 mg / L, ammonia nitrogen concentration of 30 mg / L, and total phosphorus concentration of 8 mg / L was 5kg·COD·M -3 d -1 The flow is transported to the biofilm reactor 15, which is filled with 1 kg of large granular hematite (average particle size is 200 microns) and 1.2 kg of inoculated sludge, keeping the water temperature at 34 ± 1 ℃ range. In the initial stage of sewage injection, the hydraulic retention time is 24 hours, and when the reaction is stable, the hydraulic retention time is 12 hours. The contents of COD, ammonia nitrogen and total phosphorus in the water quality were detected respectively. The measured results showed that the effluent COD concentration was 29.7 mg / L, the ammonia nitrogen concentration was 4.28 mg / L, and the total phosphorus TP concentration was 0.98 mg / L, indicating that the COD removal rate rea...
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