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Method for improving running effect of artificial wetland in winter

A technology for artificial wetlands and plants, applied in the field of environmental engineering, can solve the problems of increasing the construction, management and maintenance costs of artificial wetlands, difficult to reflect the economical efficiency of sewage treatment of artificial wetlands, etc., to achieve a good leisure and entertainment place, enrich the landscape, and improve the ability to clean up pollution. Effect

Inactive Publication Date: 2012-03-21
FUDAN UNIV
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Problems solved by technology

The construction of thermal insulation shells and thermal insulation greenhouses will significantly increase the construction, management and maintenance costs of constructed wetlands, and it is difficult to reflect the economics of sewage treatment in constructed wetlands

Method used

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Embodiment Construction

[0026] The present invention is described in detail below by embodiment:

[0027] A method for improving the operating effect of constructed wetlands in winter, which uses biogas combustion to heat the sewage flowing through the roots of constructed wetland plants, thereby improving the decontamination ability of microorganisms around the roots, thereby solving the problem of poor treatment effects of constructed wetlands in winter.

[0028] The following are the specific steps:

[0029] Water hyacinth is planted in the constructed wetland, and half of it is harvested when winter comes. After the water hyacinth is crushed, it is mixed with the inoculation sludge according to 1:1 TS at 35°C to produce biogas by anaerobic fermentation. The fermentation system adopts the common 100m 3 Fermentation tank, a batch of biogas produced after 80 days is 1900m 3 , the calorific value of biogas is 25MJ / m 3 Calculated, 47500 MJ of energy is produced. In winter, anaerobic fermentation ...

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Abstract

The invention belongs to the technical field of environmental engineering and in particular discloses a method for improving the running effect of an artificial wetland in winter. The method comprises the following steps of: planting water plants which are easy to harvest in the artificial wetland; harvesting a part of plants of the artificial wetland in winter which are used for anaerobic fermentation to produce biogas; and then heating the sewage nearby the plant roots of the artificial wetland by using the heat energy produced by biogas burning to improve the activity of microbial population around the roots and maintain sewage-purifying capability of the wetland at low temperature in winter. The biogas residues produced by fermentation are composted and are used as organic fertilizersto breed wetland landscape plants. The method does not have wastes discharge and secondary pollution in the whole process and has the advantages of less construction investment, good treatment effect, low running cost and simple and easy management.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a method for improving the operating effect of constructed wetlands in winter. Background technique [0002] Constructed wetlands are people's imitation and enhancement of natural wetlands, which purify sewage by using the filtering effect of wetland fillers and a series of physical, chemical and biological reactions between wetland plants themselves and microorganisms in plant roots. Constructed wetlands can be used to treat various pollutants such as domestic sewage, industrial wastewater, and agricultural wastewater. They have the advantages of low construction and operation costs, good treatment effects, simple operation, and convenient maintenance. [0003] Wetland vegetation is one of the cores of constructed wetlands, and its growth status will directly or indirectly affect the purification effect of constructed wetlands on sewage. Temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/34C12P5/02C05F5/00
CPCY02A40/20Y02E50/30Y02P20/133Y02W10/10Y02W30/40
Inventor 郑正颜诚李博聂耳王东
Owner FUDAN UNIV
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