Anaerobic-aerobic deep coupled method for treating high-concentration organic wastewater

An organic wastewater, high-concentration technology, applied in aerobic and anaerobic process treatment, water treatment parameter control, chemical instruments and methods, etc. Shock load capacity, low degree of suppression, and the effect of increasing biogas production

CN110790379AInactive Publication Date: 2020-02-14恩格拜(武汉)生态科技有限公司
0 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-02-14
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

An anaerobic-aerobic deep coupled method for treating high-concentration organic wastewater comprises the following steps: crushing and screening organic waste, and feeding the slurry from filtrationinto an anaerobic reaction unit for anaerobic fermentation to obtain biogas and biogas slurry; subjecting the biogas slurry after the anaerobic reaction to a synchronous nitrification and denitrification process in an aerobic reaction unit for nitrogen removal; and returning part of effluent from the aerobic reaction unit to the anaerobic reaction unit to be fully diluted and mixed with the raw slurry of organic waste for anaerobic reaction, while discharging the other part of the effluent into next treatment process or discharging the rest effluent on standard. According to the invention, theeffluent from the anaerobic reaction is discharged into the aerobic unit, and the DO value of the water in the aerobic unit is controlled to complete nitrogen removal; then, the effluent from the aerobic reaction is returned to the anaerobic unit again at a controlled reflux ratio for circular reaction; and therefore, the biogas production rate of anaerobic reaction can be increased, while the water quality of the effluent from the aerobic reaction can be higher.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for anaerobic-aerobic deep coupling treatment of organic wastewater with high suspended matter, belonging to the technical field of sewage treatment. Background technique

[0002] Anaerobic reactors are generally preferred for wastewater treatment and resource utilization, but because the reactants often contain a large amount of nitrogen-containing substances, during the anaerobic fermentation process, a large amount of protein will be transformed and decomposed, and a large amount of free ammonia nitrogen will be released, resulting in the accumulation of ammonia nitrogen , the ammonia nitrogen concentration often reaches above 2000mg / L. According to research, an important nutritional factor affecting the growth of methanogens is ammonia nitrogen. When the concentration of ammonia nitrogen is 50-200 mg / L, it is conducive to the anaerobic reaction; but when the concentration of ammonia nitrogen reaches 2000 mg / L or mo...

Examples

Embodiment Construction

[0033] The present invention utilizes the coupling of the anaerobic reaction unit and the aerobic reaction unit, the effluent after the anaerobic reaction enters the aerobic reaction unit, and by controlling the dissolved oxygen concentration in the aerobic reaction unit to be lower than 0.3mg / L, the nitrification and denitrification reaction Simultaneously, the nitrate nitrogen in the water is converted into nitrogen to complete the denitrification, and then the aerobic effluent enters the anaerobic reaction unit again, and is mixed with the raw sewage water to control the reflux ratio (the reflux ratio is the ratio of the reflux water volume to the treated water volume) , the return pipeline is equipped with an electric regulating valve, and the valve is connected to the Internet control system. According to the signal feedback, the valve can be automatically opened / closed or the flow rate of the valve can be increased / decreased, so that the concentration of ammonia nitrogen i...