Double-tank artificial rapid infiltration system and method used for high-efficiency denitrification of sewage with low C/N ratio

Abstract

The invention discloses a double-tank artificial rapid infiltration system and method used for high-efficiency denitrification of sewage with a low C/N ratio. The system comprises a water inlet box, an artificial rapid infiltration tank 1, an artificial rapid infiltration tank 2 and a water outlet box; a magnetic field is arranged in the artificial rapid infiltration tank 1, the artificial rapid infiltration tank 1 is inserted into the artificial rapid infiltration tank 2, and the bottom of the artificial rapid infiltration tank 1 communicates with the artificial rapid infiltration tank 2; andthe sewage passes through the water inlet box, and passes through a water distribution zone, a gravel zone 1, a filter material zone 1, a gravel zone 2, a water collection zone, a gravel zone 3, a filter material zone 2 and a gravel zone 4 in sequence, and treated water enters the water outlet box. According to the method provided by the invention, the magnetic field is added in the artificial rapid infiltration tank 1, and through repeated fluctuation of water inflow and fall drying time and coordinated regulation and control of the magnetic field, integrated partial short-cut nitrificationand anaerobic ammonia oxidation denitrification are realized; and the system and method provided by the invention have the advantages of short starting time, high denitrification efficiency, no production of excess sludge, low operating costs, simple convenient and flexible operation, a small floor space and no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a double-tank artificial rapid infiltration system and method for high-efficiency denitrification of sewage with a low C / N ratio. Background technique [0002] The artificial rapid infiltration system is a new type of sewage ecological treatment technology developed based on the traditional soil infiltration system. It has obvious advantages in the treatment of domestic sewage in small and medium-sized towns, rural domestic sewage, polluted river water and sewage treatment in remote areas. application prospects. However, the denitrification of the traditional artificial quick osmosis system is mainly accomplished through the nitrification and denitrification of microorganisms. Since the artificial quick osmosis system adopts the plug-flow water inflow method, although the lower part of the pool has good anoxic / anaerobic conditions, the With the step-by-step ...

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Problems solved by technology

However, the regulation of temperature, pH, etc. will undoubtedly increase the operational complexity and operating cost, which is contrary to the characteristics of the artificial rapid osmosis system, which should have the characteristics of easy operation and cost saving, and the addition of various exogenous additives will cause secondary pollution possibility of

At the same time, when the influent water quality fluctuates and the environmental conditions change, the stability of the above method will be affected to varying degrees

[0011] In addition, to make the effluent quality of some short-cut nitrification meet the requirements of anammox as much as possible, it usually takes a long start-up and regulation time; while the growth rate of anammox bacteria is slow, the doubling time is long, and the cell productivity is low, resulting in anaerobic The start-up time of ammonia oxidation is very long, and because this type of bacteria is very sensitive to environmental conditions, the operation stability is poor, which limits the popularization and application of this technology

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