A six-box integrated double-sludge denitrification phosphorus removal system and process

Abstract

The invention discloses a six-box integrated sewage treatment technology with an enhanced denitrifying phosphorus removal function. Rectangular reaction tanks spaced into six units are connected in series through a communication valve or communication pipe to form a closed loop, the functions of organic matter degradation, nitrogen and phosphorus removal and precipitation are integrated, and the land occupation of a project is effectively saved. Through alternate water output of the tanks and the switch among the states of anoxic stirring, aeration and precipitation, the functions of each stage of the A2N two-sludge technology are realized, the contradiction and competition of nitrifying bacteria, denitrifying bacteria and phosphorus-accumulating bacteria on the needs for organic load, sludge age and carbon source are solved, the energy consumption is low, the needs for carbon source are few, and the residual sludge quantity is small; and in the system operation process, the sludge-crossing backflow can be automatically realized through the reversing flow of water and without adding sludge-crossing backflow equipment, thereby saving the investment and operation cost. A PLC (programmable logic controller) controls the start / stop of the stirring equipment, aeration equipment and valve according to the regulated control technology, and full-flow automatic operation is realized.

Description

technical field [0001] The invention relates to sewage treatment technology in the field of environmental protection, in particular to a six-box integrated double-sludge denitrification phosphorus removal system and a process. Background technique [0002] As the situation of my country's water resources is becoming more and more serious, the prevention and control of water environmental pollution has received more and more attention from the government and all walks of life. Among them, the eutrophication of water body caused by the excessive discharge of nitrogen and phosphorus is one of the most concerned environmental problems at present. At present, the traditional urban sewage biological phosphorus and nitrogen removal process (such as A 2 / O process) is a relatively simple and mature process, but there are still some problems, such as the contradiction and competition between nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria in terms of ...

AI Technical Summary

Problems solved by technology

However, the most obvious defect of the traditional double-sludge denitrification phosphorus removal process is that the process flow is lengthy, and there are many structures and return systems, which increase the cost of infrastructure and operation in practical application, which limits its large-scale application.

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