Short-cut denitrification method to promote the removal of total nitrogen in wastewater

A technology of short-range denitrification and short-range nitrification, which is applied in the field of wastewater treatment and can solve problems such as failure to meet discharge standards
CN108946944BActive Publication Date: 2021-09-14BIOGAS SCI RES INST MIN OF AGRI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
BIOGAS SCI RES INST MIN OF AGRI
Publication Date
2021-09-14

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Abstract

The invention discloses a method for short-range denitrification to promote the removal of total nitrogen in wastewater. High-ammonia nitrogen wastewater passes through a pretreatment unit to remove organic matter to produce biogas, and then enters a short-range nitrification-anammox denitrification unit to remove ammonia nitrogen and most of the total nitrogen. The effluent enters the sulfur reduction short-range denitrification unit, and feeds biogas to convert nitrate nitrogen into nitrite nitrogen. Part of the effluent from the sulfur reduction short-range denitrification unit flows back to the short-range nitrification-anammox denitrification unit to continue the anammox reaction The total nitrogen is further removed, and the remaining effluent enters the post-treatment unit for advanced treatment. The effluent of the post-treatment unit meets the discharge standard and is discharged. The advantages of the present invention are: high removal rate of total nitrogen in anaerobic digestion effluent, simultaneous denitrification of wastewater and biogas desulfurization, complete autotrophic denitrification, biogas desulfurization without oxygen addition, and operating costs of the entire wastewater denitrification and biogas desulfurization system Low.
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Description

technical field

[0001] The invention relates to a short-range denitrification method using hydrogen sulfide in biogas as an electron donor to promote the removal of total nitrogen in wastewater, which belongs to the field of wastewater treatment and is suitable for livestock and poultry breeding wastewater, high-nitrogen and high-concentration industrial organic wastewater, landfill leachate, Denitrification and biogas desulfurization of biogas slurry produced by anaerobic digestion of excess sludge in urban sewage plants. Background technique

[0002] Livestock and poultry breeding wastewater, high-nitrogen and high-concentration industrial organic wastewater, landfill leachate, and residual sludge from urban sewage plants generally use anaerobic digestion to remove organic matter and produce biogas. Denitrification treatment is required before. For high-nitrogen and low-carbon wastewater, traditional biological denitrification mainly adopts nitrification-denitrification m...

Claims

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