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A new type of integrated denitrification device and its application
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A new type of denitrification technology, applied in the field of ammonia nitrogen treatment, can solve the problems of increased treatment cost, secondary pollution, and decreased ammonia nitrogen removal rate, and achieve the effects of low treatment cost, strong resistance to environmental impact, and rapid start-up
Active Publication Date: 2022-04-12
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI +1
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[0005] Although iron ammoxidation technology has many advantages, since ferric iron will be reduced to ferrous iron in the process of anaerobic iron ammoxidation, if sufficient ferric iron is not replenished in time, the removal rate of ammonia nitrogen will drop sharply, and the ferrous iron The loss of iron will cause secondary pollution, and continuous dosing of ferric iron will increase the treatment cost
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Embodiment 1
[0033] A new type of integrated denitrification device, such as figure 1 As shown, the device is divided into the middle by using a hollow tube with an open top (the material of the hollow tube is any one of stainless steel, plexiglass or polyethylene, and the height of the hollow tube is 2 / 3 of the height of the device). The aerobic zone and the surrounding anaerobic zone. The bottom of the aerobic zone of the device is equipped with an emptying port. A connected aeration device, the top side wall of the device is provided with a water outlet hole, and the bottom side wall of the device is provided with a water inlet hole.
[0034] In addition, the device also contains fillers and strains, wherein the filler is made of polyurethane filler (density 50-100g / cm 3 , the specification is (10~50)×(10~50)×(5~50)mm) and Fe(OH) 3 The powder is fully mixed according to the volume and mass ratio of 1:5~20, L:g, and the bacteria include heterotrophic iron ammonia oxidizing bacteria (Zo...
Embodiment 2
[0036] Adopt the device among the embodiment 1 to carry out denitrification treatment to the sewage containing ammonia nitrogen, concrete method is as follows:
[0037] (1) First add water to check in embodiment 1 to ensure that its operation is normal, after the inspection is completed, get the landfill leachate (the concentration of ammonia nitrogen and total nitrogen is 2415.6mg / L and 2517.9mg / L respectively, COD=13187.9mg / L, pH Perform experiments for 8.2);
[0038] (2) First, fill the device with the landfill leachate to be treated, then add 16L of filler from the top of the device, then inoculate 5L of Zobelella seed culture solution, open the aeration device, and cultivate it at room temperature for 7 days. Then inoculate 5L of activated sludge mass containing aerobic ammonium oxidizing bacteria and ferrous denitrifying bacteria, and after cultivating for 1 day, turn on the water inlet and outlet;
[0039] (3) The feed tank is controlled by a peristaltic pump, adjust t...
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Abstract
The invention relates to a novel integrated denitrification device and its application, belonging to the technical field of ammonia nitrogen treatment. The novel integrated denitrification device provided by the present invention has the advantages of small size, low investment and infrastructure cost, rapid start-up, and strong resistance to environmental impact; during the treatment process, ammonia nitrogen can be mainly converted into nitrogen, and the removal efficiency is high; in addition, the pH of the device system can be adjusted. Stable, no need to add acid and alkali, iron can be recycled without continuous dosing, low aeration demand, low treatment cost.
Description
technical field [0001] The invention belongs to the technical field of ammonia nitrogen treatment, relates to a novel integrated denitrification device, and discloses an integrated denitrification method. Background technique [0002] Nitrogen pollution is one of the main factors causing water eutrophication. Nitrogen control has always been the goal of sewage treatment. Efficient and low-cost denitrification treatment methods are the core pursuit of sewage denitrification treatment technology. Ammonia nitrogen, as the main pollutant in nitrogen, is generally removed by oxidation, and its electron acceptor can be oxygen, such as the aerobic ammonium oxidation process in nitrification; it can be nitrite, such as nitrite-type anaerobic ammonia oxidation. The latest research has found that some microorganisms can use ferric iron as an electron acceptor to oxidize ammonia nitrogen under anaerobic conditions, which is called anaerobic iron ammonia oxidation. Compared with the t...
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