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Anaerobic ammonium oxidation granular sludge cultivation method and cultivation device

An anaerobic ammonia oxidation and granular sludge technology, applied in anaerobic digestion treatment and other directions, can solve the problems of high operating cost and energy consumption, low biomass enrichment capacity, large amount of sludge production, etc. The effect of reduced sludge loss and good settling performance

Pending Publication Date: 2018-01-09
SUZHOU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the proliferation rate of this bacterium is extremely slow, and the doubling time is about 11 days, which greatly restricts the application of this highly efficient autotrophic denitrification function bacterium
[0003] Moreover, due to strict anaerobic requirements for anaerobic ammonium oxidation bacteria, most of the current anammox reactors have complex structures, high cost, high operating costs and energy consumption, large sludge production, and low biomass enrichment capacity. defect
Although the particle or fixed state can maintain a high biomass per unit volume to improve the shock load resistance of the reactor, there are also problems of mass transfer difficulty and the difficulty of exporting the nitrogen produced.

Method used

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  • Anaerobic ammonium oxidation granular sludge cultivation method and cultivation device

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Effect test

Embodiment 1

[0035] A method for cultivating anaerobic ammonium oxidation granular sludge, comprising the following steps:

[0036] Step 1: Fill the activated sludge into the reactor 2 equipped with the three-phase separator 7, form an activated sludge area at the bottom of the reactor 2, adjust the temperature through the constant temperature device 11, and control the temperature in the reactor 2 between 30°C ;

[0037] Step 2: Put wastewater with an oxygen concentration of 0.1mg / L and a pH value of 7.2 into the reactor 2 through a peristaltic pump at an ascending flow rate of 1m / h for reaction, and add an appropriate amount of trace element substances to maintain microbial growth in the wastewater and inorganic carbon source, the concentration of ammonia nitrogen in the waste water is 500mg / L, the ratio of the amount of ammonia nitrogen to nitrous nitrogen is 0.8:1, and the water retention time of reactor 2 is 10h;

[0038] Step 3: Keep the influent concentration of ammonia nitrogen an...

Embodiment 2

[0046] A method for cultivating anaerobic ammonium oxidation granular sludge, comprising the following steps:

[0047] Step 1: Fill the activated sludge into the reactor 2 equipped with the three-phase separator 7, form an activated sludge area at the bottom of the reactor 2, adjust the temperature through the constant temperature device 11, and control the temperature in the reactor 2 at 30-35°C between;

[0048] Step 2: Put wastewater with an oxygen concentration of 1 mg / L and a pH value of 7.6 into the reactor 2 through a peristaltic pump at an ascending flow rate of 3 m / h for reaction, and add an appropriate amount of trace element substances and Inorganic carbon source, the concentration of ammonia nitrogen in the waste water is 1000mg / L, the ratio of the amount of ammonia nitrogen to nitrite nitrogen is 0.9:1, and the water retention time of reactor 2 is 12h;

[0049] Step 3: Keep the influent concentration of ammonia nitrogen and nitrite nitrogen in reactor 2 stable, t...

Embodiment 3

[0057] A method for cultivating anaerobic ammonium oxidation granular sludge, comprising the following steps:

[0058] Step 1: Fill the activated sludge into the reactor 2 equipped with the three-phase separator 7, form an activated sludge area at the bottom of the reactor 2, adjust the temperature through the constant temperature device 11, and control the temperature in the reactor 2 at 30-35°C between;

[0059] Step 2: Put wastewater with an oxygen concentration of 0.2mg / L and a pH value of 7.3 into the reactor 2 through a peristaltic pump at an ascending flow rate of 2m / h for reaction, and add an appropriate amount of trace element substances to maintain microbial growth in the wastewater and inorganic carbon source, the concentration of ammonia nitrogen in the waste water is 700mg / L, the ratio of the amount of ammonia nitrogen to nitrous nitrogen is 1:1, and the water retention time of reactor 2 is 10.5h;

[0060] Step 3: Keep the influent concentration of ammonia nitrog...

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Abstract

The invention relates to the technical field of biotreatment of wastewater, in particular to an anaerobic ammonium oxidation granular sludge cultivation method and a cultivation device. The method andthe device have the beneficial effects that (1) granular sludge formed by the method is high in sedimentation performance, water impact resisting capability and stability and low in disintegration rate, the formed particle sizes are larger, meanwhile, the phenomenon of sludge loss is obviously reduced, the concentration of the sludge in a reactor is increased, and the denitrification performanceis enhanced; (2) a negative graphite plate and a positive graphite plate are energized to form an electric field, and under the condition that an internal electric field exists, the characters of charging characteristic, granule diameter and the like of the activated sludge are changed, the proliferation rate is increased, the treatment efficiency is improved, the shortcomings of long generation time, slow domestication and breeding, high loss rate of microorganisms and the like of anaerobic ammonium oxidation bacteria are overcome, and the treatment efficiency is improved; (3) the device is simple in structure, relatively high in volumetric efficiency, convenient to operate and control and low in construction cost, the cultivation method is simple and easy, and an obvious effect is achieved.

Description

technical field [0001] The invention relates to the technical field of wastewater biological treatment, in particular to an anaerobic ammonium oxidation granular sludge cultivation method and a cultivation device. Background technique [0002] Anammox bacteria is a kind of highly efficient autotrophic bacteria that is ubiquitous in nature and can directly convert nitrite and ammonia nitrogen into nitrogen gas. In the field of sewage treatment, this type of bacteria continuously converts ammonia nitrogen in water into nitrogen through catabolism, which can save 50% of the aeration amount and 100% of denitrification organic carbon source compared with the traditional nitrification and denitrification biological denitrification process , is an energy-saving and efficient sustainable biological denitrification functional bacterium, which has broad application prospects for solving the current ubiquitous problem of difficult biological denitrification of sewage with low carbon-to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 吴鹏陈亚印雯沈耀良徐乐中
Owner SUZHOU UNIV OF SCI & TECH
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