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A reduction method of nitrogen and phosphorus non-point source pollution in ecological soil system based on composite biochar

A technology for ecological soil and non-point source pollution, applied in the direction of biological water/sewage treatment, water pollutants, biological treatment devices, etc., can solve the problems of single operation and insufficient flexibility of high-purification beds, and achieve the goal of avoiding water source pollution and high utilization The effect of flexibility and compact structure

Active Publication Date: 2020-12-15
ZHEJIANG OCEAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing technologies such as the Chinese invention patent with the authorized announcement number CN 104671593 B disclose an ecological soil purification bed for non-point source pollution in farmland. This invention has a certain purification effect on water bodies, but the nitrogen and phosphorus adsorption layer is composed of zeolite, ceramsite and limestone, and the adsorption effect on nitrogen and phosphorus needs to be improved, and the operation of the high purification bed is single, and the flexibility is not enough

Method used

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  • A reduction method of nitrogen and phosphorus non-point source pollution in ecological soil system based on composite biochar

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Embodiment 1

[0015] like figure 1 As shown, a method for reducing nitrogen and phosphorus non-point source pollution in ecological soil systems based on composite biochar includes the following steps:

[0016] 1) Preparation of composite biochar: 4.7kg of sludge, 2.6kg of meal waste and 2kg of agricultural fiber materials were mixed, pyrolyzed at 510°C for 3.5h in an anoxic environment, and then 10g of methoxyacetyl chloride and 12g of hexadiene were added Acyl chloride, followed by pyrolysis at 590°C for 1.5h, the sludge is the remaining sludge in the secondary sedimentation tank of the municipal sewage plant, the meal waste is the leftovers from daily life, and the agricultural fiber materials include agricultural waste such as wheat straw, rice straw, and rice husk biomass material. Adding biochar to the ecological soil system increases the specific surface area of ​​the soil, improves the root microenvironment of the system plants, and improves the system's absorption performance and ...

Embodiment 2

[0020] like figure 1 As shown, a method for reducing nitrogen and phosphorus non-point source pollution in ecological soil systems based on composite biochar includes the following steps: First, the preparation of composite biochar: mixing sludge, meal waste and agricultural fiber materials, Pyrolysis at 560°C for 4.5 hours, followed by pyrolysis at 620°C for 2 hours, the mass ratio of sludge, food waste and agricultural fiber materials is 5.2 / 3.4 / 2; followed by the construction of an ecological soil system: the ecological soil system has partitions One 1, Partition Two 2 and Partition Three 3, the bottom of each partition is provided with a gravel layer 5, the upper part of the gravel layer 5 is provided with a soil layer 4, and the soil layer 4 is planted with emergent plants 9, and the bottom of the partition one 1 is provided with a water outlet 6. A valve 61 is provided on the water outlet 6, a water outlet 11 is provided on the bottom of the partition 2, and a valve 63 i...

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Abstract

The invention discloses a method for reducing a nitrogen and phosphor non-point source pollution of an ecological soil system based on biomass carbon. A pump is used for sending sewage to be treated to an ecological soil system, the ecological soil system is provided with a subarea one, a subarea two and a subarea three; the bottom of each subarea is provided with a gravel layer, the upper part ofthe gravel layer is provided with a soil layer, and emerged plants are planted on the soil layer; the subarea one, the subarea two and the subarea three are communicated through pipelines below the gravel layer, and the subarea two and the subarea three are communicated through pipelines on the soil layer. The method has the beneficial effects that operation is convenient, usage is flexible, andthe ecological soil system has good absorption property for nitrogen and phosphor with good removing performance; after the method is used for treatment, contents of the nitrogen and phosphor pollutants in the sewage are substantially reduced, and drinking water source pollution and water body eutrophication are avoided.

Description

technical field [0001] The invention relates to the technical field of reducing soil nitrogen and phosphorus non-point source pollution, in particular to a method for reducing nitrogen and phosphorus non-point source pollution of an ecological soil system based on composite biochar. Background technique [0002] In recent years, with the effective control of point source pollution, the pollution contribution rate of non-point source pollution, such as agricultural runoff and initial rainwater runoff, to the water environment has increased year by year, and has become a major issue in my country's drinking water source pollution, eutrophication of lakes and reservoirs, The main factor that the quality of water environment is getting worse day by day. Organic matter, nitrogen, phosphorus and other nutrients are most prominent in non-point source pollution such as agricultural runoff. For this reason, there is an urgent demand for the coordinated removal of multiple non-point s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F3/32C02F3/30C02F101/16C02F101/10
CPCC02F3/30C02F3/32C02F3/34C02F2101/105C02F2101/16C02F2203/006
Inventor 冯丽娟胡广辉陈孔清孟凡辰阳广凤穆军
Owner ZHEJIANG OCEAN UNIV