Aerobic-anaerobic-aerobic three-phase high-efficiency oxygenation wetland system

Abstract

The invention discloses an aerobic-anaerobic-aerobic three-phase high-efficiency oxygen-supplying wetland system. The aerobic-anaerobic-aerobic three-phase high-efficiency oxygen-supplying wetland system is capable of solving problems in constructed wetland that reoxygenation effect is poor, and energy consumption is high. According to the aerobic-anaerobic-aerobic three-phase high-efficiency oxygen-supplying wetland system, a siphon drain pipe is adopted for periodic siphon draining so as to maintain the periodic gas-liquid-solid three-phase mixed states of an upper aerobic zone, realize highefficiency oxygen supply, and increase the gas mass transfer efficiency of the constructed wetland system. The aerobic-anaerobic-aerobic three-phase high-efficiency oxygen-supplying wetland system comprises a wetland bed; the lateral part of the wetland bed is provided with a water outlet which is connected with the siphon drain pipe, so that the part of the wetland bed above the water outlet isconverted to be an upper aerobic zone, and the part of the wetland bed below the water outlet is converted to be a lower anaerobic zone; the top of the siphon drain pipe is lower than the top of the wetland bed, so that periodic siphon draining is realized under differential pressure, and the periodic gas-liquid-solid three-phase mixed states of the upper aerobic zone is maintained.

Description

Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an aerobic-anaerobic-aerobic three-phase high-efficiency oxygen supplement wetland system. Background technique [0002] my country is a country with very scarce fresh water resources. The per capita water resources are only about 30% of the world average. Water shortage has become an important factor restricting social and economic development. Efficient sewage treatment and water reuse are necessary in today's society. A difficult problem to overcome. In the context of rapid economic development, various industrial sectors of the national economy have developed rapidly, and these developments are undoubtedly accompanied by a large amount of sewage discharge and other problems. In recent years, my country’s sewage discharge has remained high and has a trend of increasing year by year. The subsequent water environment problems need to be solved urgently. With the development...

AI Technical Summary

Problems solved by technology

However, related studies have shown that after the tidal water inflow operation, the wetland matrix is ​​completely submerged, and the oxygen supplemented in the depletion and reoxygenation stage can be exhausted in a short period of time, simply expanding the tidal flow artificial wetland. Can cause obvious problems such as loss of local reoxygenation capacity

Although this reoxygenation method reduces operating costs compared with artificial aeration, it is obviously inferior to artificial aeration in terms of pollutant removal effect

It can be seen that the current technology cannot meet the continuous and efficient reoxygenation demand in the large-scale economic application of wetlands.

[0004] To sum up, in the prior art, there is still a lack of effective solutions to the problems of poor reoxygenation effect, high energy consumption, low COD and nitrogen and phosphorus removal rates, short-flow phenomenon and organic fouling in constructed wetlands.

Images