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Advanced treatment process of urban domestic sewage

A technology for urban domestic sewage and advanced treatment, applied in the direction of aerobic and anaerobic process treatment, can solve problems such as difficulty in realizing nitrosation, and achieve the effect of ensuring process continuity and saving power costs

Active Publication Date: 2013-07-03
BEIJING UNIV OF TECH
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Problems solved by technology

Since the nitrification process needs to oxidize ammonia nitrogen to nitrite nitrogen on the one hand to enrich ammonia oxidizing bacteria, on the other hand it needs to inhibit the further oxidation of nitrite nitrogen to nitrate nitrogen and inhibit nitrite oxidizing bacteria. The traits are very close, and the realization of this nitrosation has caused difficulties

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  • Advanced treatment process of urban domestic sewage
  • Advanced treatment process of urban domestic sewage
  • Advanced treatment process of urban domestic sewage

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Embodiment Construction

[0029] The test water was effluent from a septic tank in a community in Beijing. The water temperature was 19-21°C. After A / O removal of phosphorus and organic matter, the average total phosphorus in the effluent was 0.48mg / L, the average COD was 52.38mg / L, and the ammonia nitrogen was 47.2- 54.5mg / L, the effluent of nitrite nitrogen and nitrate nitrogen is less than 0.45mg / L.

[0030] The nitrosation process reactor is SBR, with an inner diameter of 15cm and a height of 50cm plexiglass column, with an effective volume of 120L, mechanical agitation is set, and a diaphragm aeration disc is installed at the bottom of the reactor; the effective volume of the anammox biological filter 150L, ​​0.25m in diameter, 1.0m in height, filled with volcanic rock fillers with different particle size distribution, the volume ratio from bottom to top is 0.8:1:1.2, and the particle sizes are 10-12, 8-10, 6-8mm, The reactor filling ratio was 45%.

[0031] After A / O phosphorus removal and organi...

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Abstract

The invention relates to an advanced treatment process of urban domestic sewage, and belongs to the technical field of water environment recovery. The treatment process comprises the following steps: taking effluent after the urban domestic sewage is subjected to dephosphorizing and removing organic matter through A / O as raw water, firstly using an SBR (Sequencing Batch Reactor) for carrying out whole course nitrosation, then mixing nitrosation technology water inflow which is the effluent after dephosphorizing and removing organic matter through A / O with nitrosation technology effluent according to certain proportion to fit the up-flow anaerobic ammonia oxidation biological filter, and processing the autotrophic nitrogen removal to enable the obtained effluent after the urban domestic sewage is subjected to the advanced treatment to satisfy national primary standard A. Therefore, the advanced treatment process has the advantages that contradictions such as carbon source insufficiency and great dissolved oxygen requirement difference, encountered when the dephosphorization technology and denitrification technology are disposed in the same reactor, can be effectively solved; and the efficient low carbon disposition and regeneration of the sewage can be realized.

Description

technical field [0001] The invention belongs to the technical field of water environment restoration, and in particular relates to an advanced treatment process of urban domestic sewage. Background technique [0002] In June 2012, the Ministry of Environmental Protection issued the 2011 Bulletin on the State of the Environment in China. The report pointed out that among the main pollution indicators of the top ten water systems in the country, ammonia nitrogen, biochemical oxygen demand and total phosphorus rank in the forefront, especially in the densely populated Yellow River and Yangtze River basins, where ammonia nitrogen pollution occupies the first and second respectively. 2nd place; among the 26 nationally controlled key lakes (reservoirs) monitored, the proportions of lakes (reservoirs) in mesotrophic state, light eutrophic state and moderate eutrophic state are 46.2%, 46.1% and 7.7%, respectively, most There are eutrophication problems caused by nitrogen and phosph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 李冬李德祥吴迪梁瑜海王斌高伟楠张翠丹杨胤何永平门绚曾辉平张杰
Owner BEIJING UNIV OF TECH
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