Dedicated filler for constructed wetland and preparation method for filler
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A technology of constructed wetland and clay, which is applied in chemical instruments and methods, other chemical processes, biological water/sewage treatment, etc., can solve the problems of industrial solid waste such as red mud being difficult to handle, and is convenient for engineering construction and later operation and maintenance. , low cost, easy to replace
Inactive Publication Date: 2013-01-16
CHINA UNIV OF MINING & TECH +1
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In addition, some industrial solid wastes such as red mud are also very difficult to deal with
Method used
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Embodiment 1
[0015] Embodiment 1: The components of the filler and the weight percent examples of each component are: dry sludge 13%, clay 80%, grass reed or reed 7%; described grass reed or reed is cut into sections, each the length of a paragraph 2.5cm ; Described clay is the mixed soil of dry weight ratio 10% red mud, 90% common clay;
[0016] The production method of the filler: use the usual mixing method to mix dry sludge, clay and reeds or reeds, stir and mix evenly, introduce the mixed mud into the mold, and make it into a rectangular parallelepiped or cylindrical shape, with a rectangular parallelepiped in the center Or it is a cylindrical shape with holes, and the holes are perpendicular to the large surface; then it is fired in a kiln at high temperature.
[0017] The sludge hollow brick of the present invention is made by mixing residual sludge of sewage plants in different proportions with clay, grass reed or cut reed according to requirements, and then undergoing raw materi...
Embodiment 2
[0020] Embodiment 2: dry sludge 10%, clay 85%, reed or reed 5%; described reed or reed is cut into sections, the length of each section 5cm ; Described clay is the mixed soil of dry weight ratio 10% fly ash and 90% common clay.
[0021] The clay is either a mixture of red mud and clay; the clay is a mixture of fly ash and clay; the mixture is used in the same manner as the clay, and is mixed in the same proportion as the clay; Red mud and fly ash raw materials are readily available.
[0022] Others are the same as in Example 1.
Embodiment 3
[0023] Embodiment 3: dry sludge 20%, clay 70%, reed or reed 10%; described reed or reed is cut into sections, the length of each section 1cm ; The clay is a mixture of dry weight ratio of 20% red mud and 80% common clay.
[0024] Others are the same as in Example 1.
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Abstract
The invention relates to a dedicated filler for a constructed wetland and a preparation method for the filler and belongs to sewage reclamation and reuse treatment method in environmental engineering. The dedicated filler for the constructed wetland adopts a cuboid structure and is prepared by mixing different proportions of residual sludge in a sewage plant with clay, dioscorea villosa or reed sections respectively as required and then treating, forming and sintering the raw materials. The die size and the open hole size and direction of the filter are determined according to the purposes of the filter; the holes are cuboidal or cylindrical; and the holes are vertical to the big surface. The invention has the advantages that a sludge hollow brick has the characteristics of high strength, low cost, long life and good effect of adsorbing pollutants; the engineering construction and the operating maintenance at the later stage of the filler for the constructed wetland are facilitated; the service life of the filler for the constructed wetland is prolonged; and the effect of removing phosphorus from the sewage is enhanced. The residual sludge of the sewage plant is subjected to resource utilization and serves as the raw materials, so the problem of treatment on the residual sludge of the sewage plant is solved and the influence of the residual sludge on the environment is reduced.
Description
technical field [0001] The invention relates to a treatment method for sewage regeneration and reuse in environmental protection projects, in particular to a special filler for artificial wetlands and a preparation method thereof. Background technique [0002] The constructed wetland sewage treatment system is a sewage treatment technology developed in recent years. Compared with the traditional sewage biochemical treatment process, it has the characteristics of good purification effect, low energy consumption, strong impact load resistance, and remarkable ecological and environmental benefits. So more and more people's attention. In Europe and North America, thousands of natural and human-made wetlands are used to treat a wide variety of wastewater, including municipal sewage, industrial wastewater, agricultural runoff, urban stormwater, landfill leachate, paper wastewater and mine acid drainage etc. [0003] As a complete ecosystem, constructed wetlands are mainly com...
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Application Information
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