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Anaerobic digestion and DAMO coupled biological filter column and method for treating carbon-nitrogen sewage

An anaerobic digestion and biological filtration technology, which is applied in anaerobic digestion treatment, sustainable biological treatment, chemical instruments and methods, etc., can solve the problems of high cost, easy to be affected by environmental conditions, difficult enrichment and cultivation, etc., to achieve Reduce emissions and achieve low-consumption nitrogen and carbon removal effects

Active Publication Date: 2022-07-08
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]However, both methanogens and DAMO microorganisms are anaerobic microorganisms, which are difficult to enrich and cultivate due to their slow growth rate, and are easily affected by environmental conditions
At present, the enrichment culture of DAMO microorganisms mostly focuses on the use of membrane bioreactors filled with methane gas as electron donors, which have strict management and technical requirements and high costs.

Method used

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  • Anaerobic digestion and DAMO coupled biological filter column and method for treating carbon-nitrogen sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] In this example, an integrated biological filter column reactor with an effective volume of 2.4L was used, and a water outlet was set at 50% of the column height of the reactor, and then 300mL of flocculent sludge with a certain methane-producing capacity was inoculated into the reactor, and the MLVSS was 7g / L. Pump into SCOD=200mg / L, NH 4 + -N=30mg N / L synthetic wastewater A. The water temperature is 30 ℃, anaerobic and stable for 72 hours without entering water or water, so that the flocculation sludge and the filler in the lower section of the reactor are fully contacted to form a film.

[0074] Wastewater A includes SCOD, ammonia nitrogen, macroelements and trace elements. SCOD is added with 0.1709g / L anhydrous sodium acetate and 0.0623g / L glucose, and ammonia nitrogen is added with 0.1146g N / L ammonium chloride.

[0075] The major elements contain raw materials in the following mass ratios: CaCl 2 ·2H 2 O 0.06g / L, MgSO 4 ·4H 2 O 0.1g / L, K 2 HPO 4 ·3H 2 O...

Embodiment 2

[0093] In this example, an integrated biological filter column reactor with an effective volume of 2.4L was used, and a water outlet was set at 35% of the column height of the reactor, and then 350mL of flocculent sludge with a certain methane-producing capacity was inoculated into the reactor, and the MLVSS was 9g / L. Pump into SCOD=250mg / L, NH 4 + -N=20mg N / L synthetic wastewater A. The water temperature is 35°C, anaerobic and stable for 72 hours without water and water, so that the flocculent sludge and the lower filler of the reactor are fully contacted and filmed.

[0094] Wastewater A includes SCOD, ammonia nitrogen, macroelements and trace elements. SCOD is added with 0.2186g / L anhydrous sodium acetate and 0.0789g / L glucose, and ammonia nitrogen is added with 0.1228g N / L ammonium sulfate.

[0095] The major elements contain raw materials in the following mass ratios: CaCl 2 ·2H 2 O 0.06g / L, MgSO 4 ·4H 2 O 0.3g / L, K 2 HPO 4 ·3H 2 O 0.010g / L, KHCO 3 0.12g / L. ...

Embodiment 3

[0113] In this example, an integrated biological filter column reactor with an effective volume of 2.4L was used, and a water outlet was set at 45% of the column height of the reactor, and then 300mL of flocculent sludge with a certain methane-producing capacity was inoculated into the reactor, and the MLVSS was 7g / L. Pump into SCOD=150mg / L, NH 4 + -N=40mg N / L synthetic wastewater A. The water temperature is 28°C, anaerobic and stable for 96h without entering water or under water, so that the flocculent sludge and the filler in the lower section of the reactor are fully contacted to form a film.

[0114] Wastewater A includes SCOD, ammonia nitrogen, macroelements and trace elements. SCOD is added with 0.1282g / L anhydrous sodium acetate and 0.0467g / L glucose, and ammonia nitrogen is added with 0.1554g N / L ammonium chloride.

[0115] The major elements contain raw materials in the following mass ratios: CaCl 2 ·2H 2 O 0.07g / L, MgSO 4 ·4H 2 O 0.1g / L, K 2 HPO 4 ·3H 2 O ...

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Abstract

The invention discloses a coupling anaerobic digestion and DAMO biological filter column and a method for treating carbon-nitrogen sewage, and the method comprises the steps of anaerobic digestion methane production bottom end starting, DAMO upper end starting, coupling with anaerobic digestion methane production and organic load and nitrogen load increasing stages, by adopting a step-by-step starting method, firstly, anaerobic methanogens are enriched at the lower part of a reactor; dAMO microorganisms are enriched on the upper middle portion of the reactor, methane and nitrite nitrogen / nitrate nitrogen are generated and subjected to a DAMO reaction on the upper middle portion of the reactor, the nitrite nitrogen / nitrate nitrogen is converted into nitrogen, and anaerobic removal of carbon and nitrogen in the sewage with medium and low carbon and nitrogen can be achieved while efficient autotrophic nitrogen and carbon removal of the sewage are completed. According to the method, greenhouse gas emission in the sewage treatment process is reduced, the problem that nitrate in total nitrogen in effluent is too high is solved, and low-consumption nitrogen and carbon removal of medium-and-low-concentration carbon-nitrogen sewage is realized.

Description

technical field [0001] The present invention is in the technical field of sewage biological treatment, in particular to a method for treating carbon and nitrogen sewage by coupling anaerobic digestion and a DAMO biological filter column reactor. Background technique [0002] At present, most of the urban sewage treatment plants in my country adopt the sewage denitrification process with nitrification and denitrification as the core. With the development of society and economy, the urban sewage treatment volume has gradually increased, and the sewage discharge standards have become more stringent, which makes the existing sewage treatment plants, in order to reduce the TN concentration in the effluent, must improve the denitrification and denitrification capacity or find other methods that can achieve biological denitrification. way. The traditional nitrification-denitrification process requires a large amount of aeration to maintain an aerobic environment in the nitrificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34
CPCC02F3/2853C02F3/34C02F3/2806C02F2305/06Y02W10/10Y02E50/30
Inventor 王怡张钰董士荣王玥凝
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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