Technique for cultivating bulrush and removing total nitrogen in artificial marsh of landfill leachate

A technology of landfill leachate and artificial wetland, which is applied in the field of environmental protection and can solve problems such as hindering the normal growth of plants

Inactive Publication Date: 2010-07-21
上海环境工程技术有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This may be due to the high content of COD, heavy metals, toxic and harmful substances in landfill leachate, which hinders the normal growth of plants.

Method used

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  • Technique for cultivating bulrush and removing total nitrogen in artificial marsh of landfill leachate
  • Technique for cultivating bulrush and removing total nitrogen in artificial marsh of landfill leachate
  • Technique for cultivating bulrush and removing total nitrogen in artificial marsh of landfill leachate

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Embodiment Construction

[0032] The technology of cultivating reeds to remove total nitrogen in landfill leachate artificial wetlands, choose reeds as wetland cultivation plants, and the planting density of reeds is 1000cm 2 Replenish the treated landfill leachate every day within a plant. The COD concentration of the landfill leachate is controlled below 1000mg / L, and the total nitrogen concentration is within 1000mg / L. The reeds are harvested by the end of August.

[0033] The landfill leachate in the present invention needs to be treated by processes such as mineralization bed, domestication ditch, oxidation flocculation, etc., and the COD is controlled below 1000 mg / L before it enters the artificial wetland or biological filter for planting plants.

[0034] 1 Materials and methods

[0035] 1.1 Overview of the test area

[0036] Laogang Waste Landfill is located on the edge of Nanhui East Beach, covering an area of ​​361 hectares, with a daily processing capacity of about 8,000 tons of domestic wa...

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Abstract

The invention relates to a technique for cultivating bulrush and removing total nitrogen in an artificial marsh of landfill leachate, which takes the bulrush as a marsh cultivated plant. The planting density of the bulrush is within 1000cm2 / plant, the treated landfill leachate is replenished every day, the COD concentration of the landfill leachate is controlled below 1000mg / L, the concentration of the total nitrogen is within 1000mg / L, and the bulrush is harvested at the end of August. The invention has the advantages that the absorbing capacity of the bulrush to the total nitrogen of the landfill leachate is closely related to the growth cycle, the planting density and the like, and an excellent denitrogenation effect is obtained by controlling the planting density and the clipping time; experiments prove that the highest nitrogen accumulation quantity of the parts of the stems and the leaves of the bulrush reaches 19.82g / m2 at the end of August, which shows that 3872.63g of total nitrogen can be removed from the marsh by the timely harvesting of the bulrush; and the nitrogen removal function of the artificial marsh of the landfill leachate can be best exerted by harvesting the bulrush at the end of August.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a technology for removing total nitrogen by cultivating reeds in artificial wetlands of landfill leachate. Background technique [0002] Landfill leachate has the characteristics of unstable water quality and quantity, various pollutants, high concentration of organic matter, and high concentration of ammonia nitrogen. [0003] The main treatment methods of landfill leachate include recharge method, land treatment method, physical and chemical treatment method and biological treatment method. [0004] Land treatment methods include slow seepage system (SR), rapid seepage system (RI), surface flow (oF), wetland system (WL), underground infiltration land treatment system (UG) and artificial rapid filtration treatment system (ARI), etc. . [0005] Physical and chemical treatment methods mainly include coagulation precipitation method, oxidation method, adsorption ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/32
CPCY02W10/10
Inventor 顾玉祥樊菲陈浩泉恽晓雪罗文涛
Owner 上海环境工程技术有限公司
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