Short distance denitrifying dephosphatation double-sludge technique taking granular sludge as medium and device thereof

Abstract

The invention belongs to the field of sewage treatment and provides a short distance denitrifying dephosphatation double-sludge technique taking granular sludge as medium and a device thereof. The device sequentially comprises a raw water pipe, a water inlet tank and a water inlet valve, and is characterized by further sequentially comprising an anaerobic / anoxic SBR reactor and an intermediate water tank which are connected with each other by a pipeline as well as a short distance nitration SBR reactor and a back flow water tank that are also connected with each other by the pipeline; wherein the intermediate water tank is connected with the short distance nitration SBR reactor, and the back flow water tank is connected with the anaerobic / anoxic SBR reactor; the anaerobic / anoxic SBR reactor and the short distance nitration SBR reactor are internally provided with stirring devices, and a drain pipe is arranged on the anaerobic / anoxic SBR reactor; the short distance nitration SBR reactor is internally provided with an aerating apparatus; the granular sludge which is processed by acclimatization and has the function of denitrifying dephosphatation is put into the anaerobic / anoxic SBR reactor, and the granular sludge which is processed by acclimatization and has the function of short distance nitration is put into the short distance nitration SBR reactor. The invention solves the problems of unstable effect of nitrogen and phosphorus removal of sewage, high content of effluent suspended matter and lower pass rate, so as to be used for low C / N waste water treatment.

Description

technical field [0001] The technical field of the claimed technical solution is: the technical field of nitrogen and phosphorus eutrophication sewage treatment, which relates to an efficient nitrogen and phosphorus sewage treatment method to solve the problem of unstable denitrification and phosphorus removal effects of sewage and high content of suspended solids in effluent As well as the problem of low compliance rate, it is suitable for low C / N wastewater treatment. Background technique [0002] The eutrophication of water bodies caused by nitrogen and phosphorus pollution has always been one of the main problems faced by countries all over the world, and it is also the difficulty and focus of water treatment. In the traditional nitrogen and phosphorus removal mechanism, nitrogen and phosphorus removal must be completed independently by obligate denitrifying bacteria and obligate phosphorus accumulating bacteria, and it needs to involve multiple biochemical processes such...

AI Technical Summary

Problems solved by technology

However, because the reaction carrier of this process is flocculent sludge, the mud-water separation effect in the intermediate sedimentation tank is not ideal, and the sludge after anaerobic phosphorus release has to flow back to the anoxic zone to participate in the phosphorus absorption reaction, and it is inevitable that part of the ammonia nitrogen in the sewage will be absorbed together. Converge to the anoxic zone, and this part of ammonia nitrogen has the disadvantage of high concentration of ammonia nitrogen in the effluent because it cannot be nitrified

In order to remove the remaining ammonia nitrogen, it is necessary to add a post-aeration tank, so this process has the problems of complex process flow, high infrastructure and operation costs

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