Method for improving ammonia nitrogen removal in constructed wetland by utilizing wetland harvesting plant

A technology of artificial wetlands and wetland plants, applied in the field of water treatment, can solve the problems of low dissolved oxygen level and poor denitrification effect, and achieve the effects of improving DO environment, long use time, and enhancing the occurrence of nitrification reaction

Active Publication Date: 2013-08-14
SOUTHWEST UNIVERSITY
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Problems solved by technology

[0008] Aiming at the poor denitrification effect of traditional artificial wetlands, low dissolved oxygen levels, and the disposal of wetland plants after harvesting, the present invention provides a method for using wetland harvested plants to strengthen artificial wetlands to remove ammonia nitrogen

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  • Method for improving ammonia nitrogen removal in constructed wetland by utilizing wetland harvesting plant
  • Method for improving ammonia nitrogen removal in constructed wetland by utilizing wetland harvesting plant
  • Method for improving ammonia nitrogen removal in constructed wetland by utilizing wetland harvesting plant

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Embodiment Construction

[0026] The type of wetland in the present invention is subsurface flow or surface flow artificial wetland, including pool body 1, water inlet and outlet system, wetland matrix filled in the pool body, and wetland plants 2 planted on the matrix. The wetland plants are perennial herbaceous plants. The wetland plants are carbonized after being harvested in the harvest season to obtain the biochar material of the wetland plants, and then the biochar material is used as a wetland matrix to backfill into the pool body. The wetland matrix is ​​divided into three layers, bottom layer 3, middle layer 4 and surface layer 5 from bottom to top, bottom layer 3 and surface layer 5 are crushed stones, middle layer 4 is the biomass carbon material, and the biomass The carbon material is 33%-50% of the total volume of the wetland matrix.

[0027] The thickness of the bottom layer is 8-9 cm, the thickness of the middle layer is 6-14 cm, the thickness of the surface layer is 4-5 cm, and the grav...

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Abstract

The invention discloses a method for improving ammonia nitrogen removal in a constructed wetland by utilizing a wetland harvesting plant. The constructed wetland comprises a pool body, a water inlet/outlet system, a wetland matrix and a wetland plant; the wetland plant is harvested and then carbonized to obtain a biomass carbon material of such a wetland plant, and then the biomass carbon material is backfilled into the pool body as the wetland matrix; the wetland matrix comprises a bottom layer, an intermediate layer and a surface layer which are placed from bottom to top in sequence; and the intermediate layer is the biomass carbon material. By adopting the method, the effect of removing NH4<+>-H in sewage is improved, no secondary pollution is brought, and the cost on construction and operation of the conventional constructed wetland can be effectively reduced; and the method has the characteristics of being stabile in water treatment effect and capable of buffering the impact to hydraulic power and pollution load. The method not only solves the problem that improper treatment is performed to the harvested wetland plant and causes secondary pollution to the environment, but also effectively improves the removal effect of the wetland to the NH4<+>-H, and realizes the recycle of the wetland plant.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for using wetland harvested plants to strengthen artificial wetlands to remove ammonia nitrogen. [0002] Background technique [0003] Constructed wetland is based on the principle of natural wetland purification of sewage, with natural wetland technology as the main body, combined with the action of substrate, microorganisms and plants, to construct an ecological restoration system with the advantages of low investment, simple management, and low operating costs. After nearly 40 years of development, constructed wetlands, as a potential wastewater denitrification technology, have been widely used at home and abroad. [0004] Traditional constructed wetlands mostly use self-flowing water inflow, and the dissolved oxygen in the wetland mainly comes from the contact between the water surface and the air and the oxygen secretion of plant roots. Due to the weak ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F101/16
CPCY02W10/10
Inventor 黄磊鲁言言高旭杜刚刘明郭劲松
Owner SOUTHWEST UNIVERSITY
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