Biological denitrification and phosphorus removal device and method based on DEAMOX reinforced A2/O+BAF biological process

A technology for biological denitrification, denitrification and phosphorus removal, applied in chemical instruments and methods, water pollutants, multi-stage water/sewage treatment, etc. The effect of source dosage, aeration saving and sludge production reduction

Active Publication Date: 2016-01-06
BEIJING UNIV OF TECH
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Problems solved by technology

If the sludge age is too high, it is not conducive to the removal of phosphorus; if the sludge age is too low, nitrifying bacteria cannot survive and the amount of sludge is too large, which will also affect the subsequent sludge treatment

Method used

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  • Biological denitrification and phosphorus removal device and method based on DEAMOX reinforced A2/O+BAF biological process

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Embodiment approach

[0024] 1) Inoculate activated sludge from traditional sewage treatment plants with MLSS>8000mg / L, MLVSS / MLSS>0.65, SV2 In the / O reaction device (3), make the sludge concentration 3500mg / L, and after 20 days of stable operation, inoculate the hollow ring of polypropylene that has hung the anaerobic ammonium oxidation biofilm, the filling ratio is 15%, and the specific surface area is 500m 2 / m 3 , with a density of 0.98g / cm 3 ; Polyurethane foam is added to the biological aerated filter BAF (21), the filling ratio is 40%, the porosity is 92%, and the density is 0.25g / cm 3 .

[0025] 2) The domestic sewage enters A from the water tank (1) through the water inlet pump (2) 2 The anaerobic zone (4) of the / O reaction unit (3) also enters simultaneously the return sludge from the bottom of the secondary settling tank (10) through the sludge return pump (14) to control the anaerobic zone (4) Hydraulic retention time HRT 厌氧 For 2h, the anaerobic phosphorus release reaction is car...

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Abstract

The invention discloses a biological denitrification and phosphorus removal device and method based on the DEAMOX reinforced A2 / O+BAF biological process and belongs to the field of activated sludge process waste water treatment. The device is formed by mainly connecting a water tank (1), an A2 / O reaction device (3), a secondary sedimentation tank (11) and a biological aerated filter BAF (21) in sequence. According to the method, the average hydraulic retention time (HRT) of an anoxic area is controlled under the low C / N ratio condition so that short-cut denitrification can be achieved between 3 h and 6 h, reaction substrate nitrite nitrogen is provided for anaerobic ammonia oxidizing bacteria, growing carriers are provided for the naerobic ammonia oxidizing bacteria by feeding biological filler (8) in the anoxic area, the function of the anoxic area (5) in the A2 / O+BAF process is changed, and denitrification and phosphorus removal of municipal waste water are achieved by reinforcing short-cut denitrification and Anammox (anaerobic ammonium oxidation reaction) on the basis of original denitrification. The biological denitrification and phosphorus removal device and method are applicable to low-carbon-nitrogen-ratio municipal waste water treatment, the quality of effluent water is stable, and the energy conservation and consumption reduction advantages are obvious.

Description

technical field [0001] The invention relates to a device and method for deep nitrogen and phosphorus removal, which belong to the technical field of sewage treatment by activated sludge method, and are applicable to the technical field of sewage treatment such as upgrading of new sewage plants and old sewage plants, treatment of municipal sewage and industrial waste water, etc. . Background technique [0002] At present, most municipal sewage is treated by the traditional activated sludge method. The C / N ratio of urban sewage in my country is relatively low, and the easily degradable carbon sources that can be used for anaerobic phosphorus release and denitrification denitrification are even lower. Big challenge, deep biological denitrification is the difficulty of sewage treatment. First, in the nitrification process, autotrophic nitrifying bacteria oxidize ammonia nitrogen in sewage to nitrate or nitrite, and then denitrification is a biological process in which heterotrop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
Inventor 彭永臻李健伟赵伟华马斌王淑莹
Owner BEIJING UNIV OF TECH
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