Micro-power biological ecological purification sewage treatment system

Abstract

The invention discloses a micro-power biological ecological purification sewage treatment system. The system comprises a vertical flow grit chamber, a transverse interception anaerobic digestion device and a high-load ammonia nitrogen synchronous adsorption and desorption ecological percolation bed which are communicated in sequence, a basalt substrate layer, an improved zeolite substrate layer and a ceramsite substrate layer are sequentially arranged in the high-load ammonia nitrogen synchronous adsorption and desorption ecological percolation bed from bottom to top, aquatic plants are planted on the upper portion of the ceramsite substrate layer, and sewage sequentially passes through the basalt substrate layer, the improved zeolite substrate layer and the ceramsite substrate layer and then is discharged from a water outlet of the high-load ammonia nitrogen synchronous adsorption and desorption ecological percolation bed. According to the invention, four synergistic effects of physical, chemical, biological and ecological treatment methods are integrated, and on the premise of realizing no medicament consumption, no aerobic section aeration and low energy consumption and power consumption, the removal rate of COD (Chemical Oxygen Demand) in sewage reaches 90%, the removal rate of SS (Suspended Solid) reaches 90%, the removal rate of phosphorus and nitrogen reaches 90% or above, and the effluent index stably reaches the first-grade B standard.

Description

technical field [0001] The invention relates to the technical field of sewage biological ecological treatment, in particular to a sewage treatment system for microdynamic biological ecological purification. Background technique [0002] The main water quality indicators in water environment governance are chemical oxygen demand (COD), biochemical oxygen demand (BOD), ammonia nitrogen (NH3-N), total nitrogen (TN), and total phosphorus (TP). In the process of sewage treatment, the total phosphorus (TP) usually adopts the chemical method, and the chemical is added to the sewage treatment process, so that the total phosphorus (TP) gathers into suspended solids, adsorbed on the activated sludge, and the total phosphorus is removed by sludge discharge; Ammonia nitrogen (NH3-N) and total nitrogen (TN) are removed through nitrification and denitrification. [0003] At present, A / O plus artificial wetlands are used to treat sewage, but it is only suitable for sewage treatment in cen...

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Problems solved by technology

[0003] At present, A / O plus artificial wetlands are used to treat sewage, but it is only suitable for sewage treatment in central areas of towns and towns, with high population density and large pollution discharge, and the operating cost is high, and the amount of sludge required by the chemical treatment method has increased dramatically ; Phosphorus and nitrogen removal effects are unstable and prone to fluctuations; at the same time, the sewage flow path in the wetland denitrification treatment is not comprehensive enough, and the applicability is insufficient; there are problems such as that the treated sewage cannot be effectively discharged uniformly, and the functionality is insufficient.

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