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Sulfur autotrophic denitrification granule sludge as well as preparation method and application thereof

A nitrifying particle and sulfur autotrophic technology, applied in anaerobic digestion treatment and other directions, can solve the problems of accumulation of intermediate products and difficult to solve, and achieve the effects of rapid growth, small equipment footprint, and low investment and operation costs.

Active Publication Date: 2014-10-01
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] However, like other autotrophic microorganisms, microbial activity and its biomass are important factors restricting its treatment efficiency
On the one hand, the biological toxicity of sulfide itself will inhibit the activity of reductase in the denitrification process, leading to the accumulation of intermediate products; on the other hand, the growth promotion effect of sulfide on sulfur filamentous bacteria will easily cause sludge bulking Difficult Problems in Wastewater Biological Treatment Process

Method used

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  • Sulfur autotrophic denitrification granule sludge as well as preparation method and application thereof
  • Sulfur autotrophic denitrification granule sludge as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1, the cultivation of a kind of sulfur autotrophic denitrification granular sludge

[0022] The upflow anoxic sludge reactor was initially inoculated with fresh flocculent sludge from the secondary sedimentation tank of domestic sewage treatment plant and autotrophic denitrification sludge that was statically cultured for 2 months. At the beginning of the experiment, the concentration of nitrate in the influent water was maintained at 70 mg / L (calculated as N), and the functional strains of sulfur autotrophic denitrification were quickly screened out with a higher concentration of sulfide (140 mg / L, measured as S). At the same time, a certain amount of trace element nutrient solution is added to the influent (separately, not mixed with the influent), but no organic carbon source is added, which is beneficial to the growth of autotrophic bacteria.

[0023] During the cultivation period, the rising flow rate of the reactor was gradually increased from 0.4 m / h t...

Embodiment 2

[0024] Example 2 The upflow anoxic sludge reactor wastewater treatment system shown in the attached figure is used to inoculate the flocculent sludge in the secondary sedimentation tank of domestic sewage plant to cultivate sulfur autotrophic denitrification granular sludge and treat artificial simulated wastewater.

[0025] The inner diameter of the upflow anoxic sludge reactor is 18.9 cm, the total height is 117.0 cm, the effective reaction height is 106.9 cm, the effective reaction volume of the reactor is 30 L, and the reaction temperature is controlled at 25-30 ℃ by the water circulation pipeline of the constant temperature shaker . Two three-phase separators are installed on the upper part of the reactor to separate gas, liquid and solid. In addition, a return line is set up, and the gas generated by the reaction is collected after passing through the alkaline absorption liquid.

[0026] Artificial waste water is used as influent, which mainly includes Na 2 S·9H 2 O, 2...

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Abstract

The invention discloses a preparation method of high-effect sulfur autotrophic denitrification granule sludge. Self-constructed upward flow granule sludge reactor is utilized, and the high-effect sulfur autotrophic denitrification granule sludge can be repeatedly prepared under a specific formula and a hydraulic condition. The sulfur autotrophic denitrification granule sludge is utilized under an anoxic condition, nitrate can be efficiently reduced into nitrogen, meanwhile, sulfide is oxidized into sulfate, and the effluent does not contain denitrification intermediate products such as nitrite and nitrous oxide or residue sludge, so that secondary pollution does not exist. A novel excellent and efficient method is provided for treatment of nitrogenous wastewater. No residual sludge is generated in the treatment technology, secondary pollution is avoided, the floor area of the structures is reduced, the investment and operation cost is reduced, the process target of treatment of wastes with processes of wastes against one another is achieved, and biologically synchronous nitrogen and sulfur removal process is further developed and enriched.

Description

technical field [0001] The invention relates to the field of wastewater treatment, more specifically, to a sulfur autotrophic denitrification granular sludge and its preparation method and application. Background technique [0002] The development of modern tanning, medicine, food processing and other industries is accompanied by the production of a large amount of sulfur-containing and nitrogen-containing wastewater. Under the background of increasingly scarce water resources and serious pollution, there is an increasing demand for efficient treatment of sulfur- and nitrogen-containing wastewater. more intense. [0003] Sulfur-containing wastewater has certain biological toxicity and corrosiveness, and has high requirements for the tolerance of microorganisms and the quality of equipment, and it is easy to emit unpleasant H 2 S gas is highly harmful to the environment and human body. When the water body is polluted by nutrients such as nitrogen and phosphorus, it is easy ...

Claims

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Application Information

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IPC IPC(8): C02F3/28
Inventor 吕慧陈光浩
Owner SUN YAT SEN UNIV
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