AAONAO continuous flow two-sludge denitrification advanced nitrogen removal and dephosphorization device and technology based on online control

Abstract

The invention relates to an AAONAO continuous flow two-sludge denitrification advanced nitrogen removal and dephosphorization device and technology based on online control. The device mainly comprises an anaerobic pond, a first-stage anoxic pond, a first-stage quick aeration tank, a first-stage sedimentation tank, an aeration biological filter, a second-stage anoxic pond, a second-stage quick aeration tank, a second sedimentation tank, a redox potential measuring control system, a dissolved oxygen measuring control system and an aeration subsystem. The device is based on a double-sludge denitrification nitrogen removal and dephosphorization principle and the oneline control technology, anaerobic phosphorus release, secondary sedimentation of sludge, secondary denitrification phosphorus uptake, secondary aerobiotic phosphorus uptake, secondary denitrification nitrogen removal, control of low-oxygen low-ammonia nitrogen nitrification liquor, backflow denitrification of sludge mixed liquid and other nitrogen removal and dephosphorization technologies are optimized and combined, when the carbon-nitrogen ratio of inflow water is 6.5-14, the carbon-phosphorus ratio is larger than 50, under the condition that no extra organic carbon sources are added, advanced nitrogen removal and dephosphorization of domestic wastewater are stably achieved, and the quality of outflow water can meet the requirement of surface water of the fourth grade or above.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a deep denitrification and dephosphorization purification device and process for domestic sewage, which is suitable for new construction projects of sewage plants, and specifically relates to an on-line monitoring and control based denitrification denitrification and dephosphorization purification device and process. Principle, device and process for secondary denitrification denitrification and dephosphorization. Background technique [0002] At present, my country's "Pollutant Discharge Standards for Urban Sewage Treatment Plants" Class A discharge standard stipulates that the concentration of total nitrogen in the effluent of sewage plants is 15mg / L, and the concentration of total phosphorus is 0.6mg / L, which is much higher than my country's " The value of total nitrogen 2mg / L and total phosphorus 0.4mg / L stipulated in the category Ⅴ standard of Surface Water Environment...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem that the existing A2N and Dephanox denitrification and denitrification denitrification and dephosphorization processes cannot achieve deep denitrification and dephosphorization, and the effluent water quality is unstable, and provides an AAONAO continuous flow double sludge denitrification deep denitrification and denitrification based on online control. Phosphorus device and process, the device and process is based on the principle of double sludge denitri

Images