Device and method for synchronously treating sewage and sludge by combining step-feed partial nitrification and anaerobic ammonia oxidation

Abstract

The invention discloses a device and method for synchronously treating sewage and sludge by combining step-feed partial nitrification and anaerobic ammonia oxidation and belongs to the field of biological treatment of high-ammonia-nitrogen wastewater sludge. High ammonia nitrogen loaded landfill leachate is firstly pumped into an aerobic reactor to complete a partial nitrification process; exogenous excess sludge and the effluent of a partial nitrification reactor are pumped into an anoxic reactor together, so that the coupling process of excess sludge fermentation and denitrification is realized; finally, effluent of a fermentation coupling denitrification reactor is pumped into an integrated autotrophic nitrogen removal reactor in stages, the integrated reactor comprises an aeration main operation unit and an anoxic stirring main operation unit; ammonia nitrogen is oxidized into nitrite nitrogen in an aeration stage; the generated nitrite nitrogen and secondary inflow ammonia nitrogen are removed through an anaerobic ammonia oxidation process. The device and method of the invention are stable and reliable in operation and easy to regulate and control; advanced treatment of the late landfill leachate is completed under the condition that no external carbon source is added, and meanwhile the purpose of fermentation reduction of the external excess sludge is achieved.

Description

technical field [0001] The invention relates to a device and method for synchronously treating sewage and sludge by a staged short-range nitrification-anammox process of water inflow, and belongs to the field of biological treatment of high ammonia nitrogen wastewater sludge. The landfill leachate with high ammonia nitrogen load is first pumped into the aerobic reactor to complete the short-cut nitrification process; the exogenous excess sludge and the effluent from the short-range nitrification reactor are pumped into the anoxic reactor together to realize the coupling process of excess sludge fermentation and denitrification; finally The effluent from the fermentation coupled denitrification reactor is pumped into the integrated autotrophic denitrification reactor in sections. The integrated reactor includes two main operating units: aeration and anoxic stirring. Ammonia nitrogen is oxidized to nitrite nitrogen during the aeration stage , the generated nitrite nitrogen and s...

AI Technical Summary

Problems solved by technology

Landfill leachate is a kind of organic wastewater with high ammonia nitrogen concentration, complex composition and extremely poor biochemical properties. If it is not properly disposed of, it will pose a huge threat to the natural environment and human health.

At present, most of the landfill leachate treatment process still adopts the traditional nitrification-denitrification biological denitrification process, but due to the high requirements of the influent carbon source in the traditional process, it is difficult to effectively treat landfill leachate with low C / N ratio

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