Ecological green ditch matrix materials for prevention and control of agricultural non-point source pollution and ecological green ditch construction method

Abstract

The invention discloses ecological green ditch matrix materials for prevention and control of agricultural non-point source pollution and an ecological green ditch construction method. The ecologicalgreen ditch matrix materials comprise 20-45% of furfural residues, 20-35% of activated sludge immobilized pellets, 15-30% of an adsorption material, 10-25% of a high-permeability material, 1-20% of aslow release oxygen material and 1-20% of a pH buffer material. The ecological green ditch matrix materials are laid on the bottom and both side slopes of a farmland irrigation-drainage ditch, and arecompacted, the degree of compaction is 80-100%, and the laying thickness is 10-35% of the water depth in the farmland irrigation-drainage ditch; and plants are planted on the bottom and side slopes with the laid ecological green ditch matrix materials, and the retention time of farmland drainage water in the ditch remains 48 h or above. Through the ecological green ditch matrix materials, a microbial population is provided for removal of pollutants in the farmland drainage water, a local high-concentration microbial degradation environment can be formed, and degradation of organic matter, nitrogen, phosphorus and other matter by microorganisms is facilitated.

Description

technical field

[0001] The invention belongs to the technical field of non-point source pollution control, and in particular relates to an ecological green ditch matrix material for preventing and controlling agricultural non-point source pollution and a construction method of the ecological green ditch. Background technique

[0002] With the continuous strengthening of environmental law enforcement and supervision and the improvement of public awareness of environmental protection, my country's point source pollution is gradually being fully controlled, and non-point source pollution, especially agricultural non-point source pollution, has become the main source of surface water pollution. my country's arable land area accounts for 7% of the world's total arable land area, but my country's nitrogen fertilizer application accounts for more than 30% of the world's application amount, and the average nitrogen utilization rate is about 45%, which is far lower than the 60% utiliz...

Examples

Embodiment 1

[0035] The ecological green ditch matrix material includes 32% by mass of furfural slag, 35% of activated sludge immobilized pellets, 15% of adsorbent material, 10% of high permeability material, and 7% of slow-release oxygen material and 1% pH buffer material. Add activated sludge immobilized pellets, adsorption materials, high-permeability materials, slow-release oxygen materials, and pH buffer materials in turn into furfural slag. During the doping process, stir continuously and mix evenly to form an ecological green ditch matrix material. .

[0036]In this example 1, the activated sludge was taken from the aerobic tank of Tianjin Jizhuangzi Sewage Treatment Plant, and the sludge-sludge-water mixture was first settled naturally, and then the settled sludge was centrifuged at 3500 rpm for 30 minutes , to obtain concentrated activated sludge. The concentrated activated sludge was uniformly mixed with chitosan and biochar at a ratio of 5:4:1 (w / w). The biochar was prepared f...

Embodiment 2

[0040] The ecological green ditch matrix material includes 40% furfural slag, 20% activated sludge immobilized pellets, 20% adsorption material, 10% high permeability material, and 5% slow-release oxygen material in mass percentage and 5% pH buffer material. Add activated sludge immobilized pellets, adsorption materials, high-permeability materials, slow-release oxygen materials, and pH buffer materials in turn into furfural slag. During the doping process, stir continuously and mix evenly to form an ecological green ditch matrix material. .

[0041] In this Example 2, the activated sludge was taken from the aerobic tank of Dasi Wastewater Treatment Plant in Xiqing District, Tianjin, and the sludge-sludge-water mixture was first settled naturally, and then the settled sludge was centrifuged at 4000 rpm After 25 minutes, concentrated activated sludge was obtained. The concentrated activated sludge was uniformly mixed with chitosan and biochar at a ratio of 5:4:1 (w / w), and th...

Embodiment 3

[0045] The ecological green ditch matrix material includes 20% by mass percentage of furfural slag, 28% of activated sludge immobilized pellets, 25% of adsorption material, 25% of high-permeability material, and 1% of slow-release oxygen material and 1% pH buffer material. Add activated sludge immobilized pellets, adsorption materials, high-permeability materials, slow-release oxygen materials, and pH buffer materials in turn into furfural slag. During the doping process, stir continuously and mix evenly to form an ecological green ditch matrix material. .

[0046] In this Example 3, the activated sludge was taken from the aerobic tank of Tianjin Xianyang Road Sewage Treatment Plant, and the sludge-sludge-water mixture was first settled naturally, and then the settled sludge was centrifuged at 3500 rpm for 30 minutes , to obtain concentrated activated sludge. The concentrated activated sludge was uniformly mixed with chitosan and biochar at a ratio of 5:4:1 (w / w). The biocha...

technical field

[0001] The invention belongs to the technical field of non-point source pollution control, and in particular relates to an ecological green ditch matrix material for preventing and controlling agricultural non-point source pollution and a construction method of the ecological green ditch. Background technique

[0002] With the continuous strengthening of environmental law enforcement and supervision and the improvement of public awareness of environmental protection, my country's point source pollution is gradually being fully controlled, and non-point source pollution, especially agricultural non-point source pollution, has become the main source of surface water pollution. my country's arable land area accounts for 7% of the world's total arable land area, but my country's nitrogen fertilizer application accounts for more than 30% of the world's application amount, and the average nitrogen utilization rate is about 45%, which is far lower than the 60% utiliz...

Examples

Embodiment 1

[0035] The ecological green ditch matrix material includes 32% by mass of furfural slag, 35% of activated sludge immobilized pellets, 15% of adsorbent material, 10% of high permeability material, and 7% of slow-release oxygen material and 1% pH buffer material. Add activated sludge immobilized pellets, adsorption materials, high-permeability materials, slow-release oxygen materials, and pH buffer materials in turn into furfural slag. During the doping process, stir continuously and mix evenly to form an ecological green ditch matrix material. .

[0036]In this example 1, the activated sludge was taken from the aerobic tank of Tianjin Jizhuangzi Sewage Treatment Plant, and the sludge-sludge-water mixture was first settled naturally, and then the settled sludge was centrifuged at 3500 rpm for 30 minutes , to obtain concentrated activated sludge. The concentrated activated sludge was uniformly mixed with chitosan and biochar at a ratio of 5:4:1 (w / w). The biochar was prepared f...

Embodiment 2

[0040] The ecological green ditch matrix material includes 40% furfural slag, 20% activated sludge immobilized pellets, 20% adsorption material, 10% high permeability material, and 5% slow-release oxygen material in mass percentage and 5% pH buffer material. Add activated sludge immobilized pellets, adsorption materials, high-permeability materials, slow-release oxygen materials, and pH buffer materials in turn into furfural slag. During the doping process, stir continuously and mix evenly to form an ecological green ditch matrix material. .

[0041] In this Example 2, the activated sludge was taken from the aerobic tank of Dasi Wastewater Treatment Plant in Xiqing District, Tianjin, and the sludge-sludge-water mixture was first settled naturally, and then the settled sludge was centrifuged at 4000 rpm After 25 minutes, concentrated activated sludge was obtained. The concentrated activated sludge was uniformly mixed with chitosan and biochar at a ratio of 5:4:1 (w / w), and th...

Embodiment 3

[0045] The ecological green ditch matrix material includes 20% by mass percentage of furfural slag, 28% of activated sludge immobilized pellets, 25% of adsorption material, 25% of high-permeability material, and 1% of slow-release oxygen material and 1% pH buffer material. Add activated sludge immobilized pellets, adsorption materials, high-permeability materials, slow-release oxygen materials, and pH buffer materials in turn into furfural slag. During the doping process, stir continuously and mix evenly to form an ecological green ditch matrix material. .

[0046] In this Example 3, the activated sludge was taken from the aerobic tank of Tianjin Xianyang Road Sewage Treatment Plant, and the sludge-sludge-water mixture was first settled naturally, and then the settled sludge was centrifuged at 3500 rpm for 30 minutes , to obtain concentrated activated sludge. The concentrated activated sludge was uniformly mixed with chitosan and biochar at a ratio of 5:4:1 (w / w). The biocha...

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