Method for efficiently purifying heavy metal polluted wastewater by combining wetland plant

A technology of wetland plants and heavy metals, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the limitations of artificial wetland treatment technology application, lack of research on wetland plant species selection and configuration, etc. problem, to achieve the effect of strong absorption and purification ability and improvement of purification effect

Active Publication Date: 2011-02-16
溧阳常大技术转移中心有限公司
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Problems solved by technology

At present, in the field of constructed wetland treatment of heavy metal polluted wastewater, there is still a lack of research on the selection and configuration of wetland plant species, which severely limits the application of constructed wetland treatment technology in purifying heavy metal polluted wastewater.

Method used

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  • Method for efficiently purifying heavy metal polluted wastewater by combining wetland plant
  • Method for efficiently purifying heavy metal polluted wastewater by combining wetland plant
  • Method for efficiently purifying heavy metal polluted wastewater by combining wetland plant

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Embodiment Construction

[0013] 1. Construction of artificial wetland pool

[0014] Use natural low-lying land (ponds, rivers) or use cement concrete to build artificial wetland pools. The area of ​​artificial wetland pools is determined according to the amount of sewage treatment, and the daily sewage discharge (m 3 ): Wetland pool area (m 2 ) at a ratio of 1:5, filled with non-polluted soil with a thickness of 40-50cm; after 10 days of soaking in the wetland pool (keep the water level 10cm higher than the soil), plant seedlings of wetland plants.

[0015] 2. Wetland plant collection, planting and management

[0016] The seedlings of 6 kinds of wetland plants were collected in the suburbs, and the specific species, family and scientific names are shown in Table 1. Then according to the interspecific spacing of the planting amount of the following ratio, six kinds of plants are planted into the artificial wetland pool, the average plant spacing of the plants is 20cm, and the spacing distance between...

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Abstract

The invention belongs to wetland purification technology for wastewater and relates to a method for efficiently purifying heavy metal polluted wastewater by combining wetland plants. Six wetland plants are cultured in an artificial wetland, namely Echinochiloa crus-galli, Alternanthera philoxeroides, Zizania latifolia, Monochoria vaginalis, Iachne globosa and Polygonum hydropiper according to a culture ratio of 1:2:1:3:2:3. The purification rate for six main heavy metal pollution elements (Cd, Pb, Zn, Cu, Cr and Ni) in the wastewater is over 92 percent.

Description

technical field [0001] The invention belongs to the wetland purification technology of sewage, in particular to a method for efficiently purifying heavy metal polluted wastewater by combining wetland plants. Background technique [0002] The types of pollutants in urban sewage are complex, not only a variety of organic pollutants, inorganic pollutants such as nitrogen and phosphorus, but also a variety of toxic heavy metal pollution elements, especially wastewater from metallurgy, printing and dyeing, and chemical industries. [0003] Traditional urban sewage treatment technologies include physical, chemical and biological degradation, etc. These methods have better effects on organic pollutants in wastewater, but if wastewater contains high concentrations of heavy metal pollutants, heavy metals cannot be effectively removed. Moreover, heavy metals can also inhibit the normal degradation function of organisms. [0004] Heavy metals are mostly metal elements that are highly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 刘建国朱忠泉孙向武
Owner 溧阳常大技术转移中心有限公司
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