Method for treating home wastewater through artificial wetland combined vertical current with surface current

Abstract

The present invention discloses a combined artificial wet land domestic sewage treatment method. Said combined artificial wet land is formed from front vertical-flow artificial unit land and rear surface-flow artificial wet land which are series-connected together. Firstly, the domestic sewage can be fed into precipitation tank to remove sand and large-granule suspended solids, then fed into vertical-flow artificial wet land to implement filtration treatment, in the vertical-flow artificial wet land the artificial mixed matrix can be filled and the ornamental plants can be planted, then the sewage can be fed into the surface-flow artificial wet land to make purification treatment, in the surface-flow wet land the water plants, flower plant and vegetables can be planted or the fishes can be bred.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating domestic sewage in a composite constructed wetland. Background technique [0002] The domestic sewage constructed wetland treatment methods mainly include vertical flow constructed wetland, horizontal flow, surface flow and composite constructed wetland combining vertical flow and horizontal flow. [0003] The height of the vertical flow artificial wetland bed is more than 100cm, and finer substrates such as sand are usually used as the infiltration medium. The sewage is treated in the process of vertical infiltration from the surface downward, and most of the plants used are reeds and windmill grasses. , canna and vetiver etc. [0004] The height of the horizontal flow constructed wetland bed is about 60-80cm, and a relatively coarse substrate such as gravel is used as the treatment medium. The sewage flows horizontally under the surface of the co...

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Problems solved by technology

[0009] (2) The vertical flow constructed wetland has a strong treatment capacity and nitrification ability for oxygen-consuming organic matter in wastewater. 5 The removal effect of COD and COD is better, but the removal effect of SS is worse than that of horizontal flow constructed wetland; although it has a strong nitrification treatment ability for wastewater, its denitrification ability is also worse than that of horizontal flow constructed wetland, so it cannot Independently complete the two treatment processes of nitrification and denitrification of wastewater to achieve the purpose of wastewater denitrification treatment

[0010] (3) Both the vertical flow constructed wetland system and the surface flow constructed wetland system are not very good at removing phosphorus from domestic sewage, especially the surface flow constructed wetland is poor, and the current vertical flow constructed wetland is widely used in sand, gravel and other substrates The adsorption saturation life of phosphorus is only a few years

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