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Method for biologically treating sewage through cation exchange, adsorption and filtering by using rice hull carbon

A cation exchange and biological treatment technology, which is applied in the field of constructed wetland water treatment, can solve the problems that the cation exchange capacity of wetland soil is not particularly obvious, and achieve the effects of significant diversity of microbial communities, improvement of fertilizer retention capacity, and growth promotion

Inactive Publication Date: 2013-01-02
南京置格环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, except for intercepting a small part of dissolved nitrogen and phosphorus for plant uptake and utilization, these fillers do not have a particularly obvious effect on improving the cation exchange capacity of wetland soil.

Method used

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  • Method for biologically treating sewage through cation exchange, adsorption and filtering by using rice hull carbon
  • Method for biologically treating sewage through cation exchange, adsorption and filtering by using rice hull carbon

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Embodiment

[0013] On one side of a field ditch with a width of 5m and a length of 500m, dig a piece of earth with a length, width and height of 1.5m*1.5m*1.5m every five meters (such as figure 2 shown). After backfilling the earthwork, spread rice husk charcoal with a particle size of about 2.5mm and the original soil every 5cm in the earthwork, and plant a bald cedar (such as figure 1 ). Utilizing the water level drop of the natural water body, the water flows through the interlayer of artificial carbon soil to make the water body fully contact with the carbon material, so that filtration, adsorption, and ion exchange reactions occur, forming a sewage treatment system to absorb and remove pollutants such as nitrogen and phosphorus. At the same time, the soil improved by rice husk charcoal, due to the enhanced cation exchange capacity, improves the surrounding soil environment, enhances soil fertility, and better promotes the growth of crops.

[0014] Rice husk charcoal is used to imp...

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Abstract

The invention relates to a method for biologically treating sewage through cation exchange, adsorption and filtering by using rice hull carbon. The method is characterized by comprising the following steps of: digging earthwork with the volume of 1.5m*1.5m*1.5m in a ditch and pond water front zone; laying the rice hull carbon and the original soil on a backfill soil layer at high intervals of 5cm; and planting taxodium distichum in the earthwork after the backfill soil layer is laid. Water flow flows through an artificial carbon-soil interlayer by using the water height of a natural water body, so that the water body is fully contacted with a carbon material; cation in the water body is exchanged with a functional group on the surface of the carbon material and is fixed on the surface of the carbon material; and the cation which is exchanged and trapped on the carbon material is absorbed by a root system of the taxodium distichum and then is discharged out of a water body system. Compared with the conventional artificial wetland treating technology, the method has the advantages that: nitrogen-phosphorous removal efficiency is obviously improved; simultaneously, the cation is frequently exchanged in the soil improved by the rice hull carbon; microbial communities have diversity; fertilizer fixing capacity and plant growing capacity are enhanced; and plants such as the taxodiumdistichum and the like are better promoted to grow.

Description

technical field [0001] The invention relates to a method for biologically treating sewage by utilizing rice husk charcoal for cation exchange, adsorption and filtration, and belongs to the technical field of artificial wetland water treatment. Background technique [0002] Constructed wetland is a cost-effective sewage treatment system, which uses the physical, chemical and biological triple synergies of substrate-aquatic plants-microbes in the ecosystem to purify sewage. When the sewage flows through the wetland bed, the suspended particulate matter is firstly removed from the sewage through the interception, adsorption, and co-sedimentation of plant roots and wetland fillers. The organic part is gradually degraded by the plant rhizosphere microorganisms and the biofilm formed on the filler over time. The inorganic fraction is retained as part of the wetland bed and herbaceous plants. At present, the fillers that are often used in constructed wetlands include gravel, zeol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 刘新张齐生
Owner 南京置格环保科技有限公司
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