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A kind of starting method of anaerobic ammonium oxidation process

An anammox and process technology, applied in anaerobic digestion treatment, chemical instruments and methods, biological treatment adjustment methods, etc., can solve the problem of slow growth of anammox bacteria and long start-up time of anaerobic nitrogen oxidation process, etc. question

Active Publication Date: 2022-03-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, anammox bacteria grow slowly, with a generation cycle of about 11 days. They are sensitive to light and oxygen, and have strict requirements on the living environment, resulting in a long start-up time for the anaerobic nitrogen oxidation process, and a longer time for the formation of granular sludge

Method used

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  • A kind of starting method of anaerobic ammonium oxidation process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] step one:

[0055] Take the sludge from the bottom of the settling tank in a domestic sewage treatment plant and let it stand for concentration, discard the supernatant, and use the pre-configured inorganic salt solution (NaCl: 1000-1500mg / L, KH 2 PO 4 : 10mg / L, CaCl 2 : 50mg / L, MgSO 4 : 300mg / L) eluted 4 times, after each elutriation, let it stand for 1.5 hours and discard the supernatant, the purpose is to remove inorganic impurities and organic pollutants adsorbed on the sludge surface as much as possible. The sludge after elutriation and concentration is loaded into the EGSB reactor, and the amount of sludge accounts for about 1 / 2 of the effective volume of the reactor.

[0056] Step two:

[0057] Preparation of trace element nutrient solutions Ⅰ and Ⅱ:

[0058] Trace element nutrient solution Ⅰ: EDTA 5000mg / L, FeSO 4 5000mg / L;

[0059] Trace element nutrient solution Ⅱ: EDTA 5000mg / L, MnCl 2 4H 2 O 990mg / L, ZnSO 4 ·7H 2 O 430mg / L, CoCl 2 ·6H 2 O 240mg...

Embodiment 2

[0069] step one:

[0070] Take the sludge from the bottom of the settling tank in a domestic sewage treatment plant and let it stand for concentration, discard the supernatant, and use the pre-configured inorganic salt solution (NaCl: 1000-1500mg / L, KH 2 PO 4 : 10mg / L, CaCl 2 : 50mg / L, MgSO 4 : 300mg / L) eluted 4 times, after each elutriation, let it stand for 1.5 hours and discard the supernatant, the purpose is to remove inorganic impurities and organic pollutants adsorbed on the sludge surface as much as possible. The sludge after elutriation and concentration is loaded into the EGSB reactor, and the amount of sludge accounts for about 1 / 2 of the effective volume of the reactor.

[0071] Step two:

[0072] Preparation of trace element nutrient solutions Ⅰ and Ⅱ:

[0073] Trace element nutrient solution Ⅰ: EDTA 5000mg / L, FeSO 4 5000mg / L;

[0074] Trace element nutrient solution Ⅱ: EDTA 5000mg / L, MnCl 2 4H 2 O 990mg / L, ZnSO 4 ·7H 2 O 430mg / L, CoCl 2 ·6H 2 O 240mg...

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Abstract

The invention discloses a method for starting an anammox process, which controls the concentrations of ammonia nitrogen and nitrite nitrogen in influent water and different hydraulic mixing conditions in stages to enrich and cultivate anammox bacteria in stages Optimization has significantly improved the start-up speed of the enrichment culture of anammox bacteria and the anammox granular sludge bed process, which can show obvious anammox effect within 3 months and form operation within 4 months Stable anammox granular sludge bed greatly saves process start-up time.

Description

technical field [0001] The invention belongs to the technical field of ammonia nitrogen treatment, and relates to a method for starting an anaerobic ammonium oxidation process. Background technique [0002] Nitrogen pollution is one of the important factors causing water pollution and also an important reason for water eutrophication. The traditional biochemical treatment of ammonia nitrogen is generally realized through the combined process of nitrification and denitrification. The nitrification stage requires aeration to realize the nitrification of ammonia nitrogen, which consumes a lot of power. The denitrification process must have sufficient carbon sources, urban sewage and certain Some special sewage often lacks carbon sources and needs additional carbon sources, which increases operating costs and may cause secondary pollution. During the anammox process, anammox bacteria convert CO 2 as carbon source, with NO 2 - is the electron acceptor, NH 4 + As an electron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/16
CPCC02F3/006C02F3/2833C02F3/34C02F2101/16C02F2101/166
Inventor 曹宗仑孙杰赵璞张英雄
Owner CHINA PETROLEUM & CHEM CORP
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