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Biological denitrification and phosphorus removal device and method based on DEAMOX reinforced A <2> /O+ biological contact oxidation process

A technology of biological contact and biological denitrification, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as long generation cycle, autotrophic denitrification of urban sewage, etc. Reach the effects of reducing sludge production, saving carbon source dosage, and saving aeration

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

However, due to the relatively long generation cycle of anammox bacteria, anammox is mainly used for high ammonia nitrogen wastewater treatment, and with the application of actual anammox projects and the research on anammox granular sludge is increasing, Make it possible for urban sewage autotrophic denitrification

Method used

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  • Biological denitrification and phosphorus removal device and method based on DEAMOX reinforced A &lt;2&gt; /O+ biological contact oxidation 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 4000mg / L, and after 18 days of stable operation, inoculate the biofiller (9) that has hanged the anaerobic ammonia oxidation biofilm in the anoxic zone (5), the filling ratio 30%; in the biological contact oxidation zone (7), add biological filler (9), the filling ratio is 40%; the specific surface area of ​​biological filler (9) is 500m 2 / m 3 , with a density of 0.98g / 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 device (3) also enters the return sludge that is drawn back through the sludge return pump (14) from the bottom of the secondary settling tank (11) simultaneously, and in the anaerobic zone (4) Anaerobic phosphorus release reaction is carried out inside, and the anaerobic hydraulic ret...

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Abstract

The invention discloses a biological denitrification and phosphorus removal device and method based on the DEAMOX reinforced A <2> / O+ biological contact oxidation 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 A <2> / O reaction device (3), a secondary sedimentation tank (11) and a biological contact oxidation reaction device (12) 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, reaction substrate nitrite nitrogen is provided for anaerobic ammonia oxidizing bacteria, growing carriers are provided for the anaerobic ammonia oxidizing bacteria by feeding biological filler (9) in the anoxic area (5), the function of the anoxic area (5) in the A <2> / O+ biological contact oxidation process is changed, and deep 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 city 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] Excessive discharge of nutrients such as nitrogen and phosphorus is an important cause of eutrophication in closed water bodies, lakes and slow-flowing waters. Therefore, the discharge standards for nitrogen and phosphorus are increasingly tightened. my country's urban sewage has a relatively low C / N ratio, and the easily degradable carbon sources that can be used for anaerobic phosphorus release and denitrification denitrification are even lower, posing a great challenge to sewage treatment. At present, many sewage treatment plants in my country cannot stably meet the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 彭永臻李健伟马斌赵伟华王淑莹
Owner BEIJING UNIV OF TECH
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