Composite vertical current artificial wetland oxygenation system

Abstract

The invention discloses a compound vertical flow artificial wetland oxygen increasing system. The system consists of an air compressor, a compound vertical flow artificial wetland, a downlink flow pool and an uplink flow pool; the downlink flow pool which is communicated with the bottom and the uplink flow pool form a compound vertical flow artificial wetland, the bottom of which is provided with at least three emptying tubes which are connected in parallel; the walls of the emptying tubes are provided with through holes; the emptying tubes at the bottom of the downlink flow pool are internally and respectively provided with perforated aeration tubes which are connected in parallel; and one end of the perforated aeration tube is closed, and the other end thereof is connected with an airway which is connected with the air compressor of the ground surface. The invention has simple structure and is provided with emptying tubes at the bottom of the compound vertical flow artificial wetland, conducts intermittent aeration in the emptying tubes at the bottom of the downlink flow tool on the optimized oxygen increasing condition, creates an environment condition of aerobic and anaerobic alternate change which is required by the nitrification and denitrification reactions, and greatly enhances the denitrification effect.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage treatment, and more specifically relates to a simple and efficient aeration system for a composite vertical flow constructed wetland, which is suitable for domestic sewage, polluted surface water, non-point source sewage, and high-concentration ammonia-nitrogen wastewater. Suitable for sewage treatment in cold regions. technical background [0002] Constructed wetland is a new sewage treatment process developed in the 1970s. It has the characteristics of high efficiency, low cost, and simple operation and management. It has been widely used in the treatment of domestic sewage, rural non-point source pollution, landfill leachate and lakes. Pollution Prevention. [0003] The main way to remove nitrogen in constructed wetlands is to rely on microbial nitrification and denitrification, while other removal methods such as plant absorption and ammonia nitrogen volatilization ar...

AI Technical Summary

Problems solved by technology

[0005] 1. The ventilation pipe is self-flowing air ventilation, and the air transfer efficiency is not high; and the laying of multi-layer ventilation pipes increases the infrastructure investment of the wetland system

[0006] 2. The method of wind energy oxygenation is greatly restricted by region and climate, resulting in unstable treatment effect of wetland system

[0007] 3. None of the three oxygenation methods have created the optimal aerobic and anaerobic environmental conditions required for nitrification and denitrification reactions, resulting in NO in wetland effluent 3 - -N concentration increases, nitrogen removal rate decreases

[0008] 4. The three aeration methods are to directly bury the open-hole ventilation pipe in the matrix of the wetland system, and fine sand and gravel can easily block the opening of the ventilation pipe

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