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In-situ treatment method for farmland recession

An in-situ treatment and farmland technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., achieves the effects of high mechanical strength, strong environmental adaptability, and simple methods

Active Publication Date: 2020-01-14
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the face of ever-changing hydrological and water quality conditions, conventional technologies cannot solve practical problems, and to a certain extent, the extraction and research of common technologies for water environmental protection and restoration are insufficient

Method used

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  • In-situ treatment method for farmland recession

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of embodiment 1 composite flora multilayer immobilization material (1-9)

[0042] figure 2 Shown, a kind of optional complex flora multi-layer immobilization material (1-9), its preparation comprises the following steps:

[0043] Step 1: a. Select the ordinary anaerobic granular sludge (1-1) and the aerobic activated sludge (1-2), mix them uniformly according to the mass ratio of 2:1, and fill them into the upflow anaerobic sludge In the sludge bed reactor (1), transport the culture substrate at the bottom of the reactor, add trace element substances, control the temperature in the upflow anaerobic sludge bed reactor (1) to 30-35°C, and add NaHCO 3 , NaHCO 3 As a carbon source, adjust the pH value between 7.5 and 8.5 at the same time, the hydraulic retention time is 10h, and run stably for 220 days to obtain the anammox granular sludge (1-3); the NH in the culture medium 4 + -N concentration is 50mg / L, NH 4 + -N and NO 2 - -N concentration is pr...

Embodiment 2

[0048] Embodiment 2 In-situ treatment of farmland dewatering

[0049] figure 1 As shown, an optional in-situ treatment method for farmland receding water includes the following steps.

[0050] Step 1: Dosing in situ

[0051] Apply the multi-layer immobilized material (1-9) of the composite flora to the shoreline of farmland receding water, according to 0.5kg / m 2 The proportion is evenly filled at the position of 0.5-2m below the water surface, so that the receding water of the farmland naturally seeps through the sunny shore zone, and the flow rate of the receding water of the farmland passing through the flow section is maintained at 0.2-2m / s, and every 3-6 months According to 0.5kg / m 2 Proportionally replenish the multi-layer immobilized material (1-9) of the complex flora once.

[0052] Step 2: Water Quality Monitoring

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Abstract

The invention discloses an in-situ treatment method for farmland recession, belongs to the field of ecology and environment protection and in particular relates to a method for removing nitrogen, phosphorus and organic matters from farmland recession by using a multilayer immobilized material of periphyton adhesion composite flora. The method comprises the following steps: performing culture and domestication on ordinary anaerobic granular activated sludge and aerobiotic activated sludge so as to obtain anaerobic ammonia oxidation granular sludge and aerobiotic nitration granular sludge, performing separation screening and activity retention drying so as to obtain the kernel of the multilayer immobilized material of composite flora, and performing pelletizing by using a sphere molding mold, so as to obtain the multilayer immobilized material of the composite flora. The multilayer immobilized material of the composite flora is applied to a recession bank of a farmland, periphyton adhesion growth on the recession bank is achieved, natural seepage of farmland recession passes through the recession bank with sufficient sunshine, and a periphyton intensified denitrification system for farmland recession pollution prevention and control can be constructed. By virtue of the characteristics that an immobilization microorganism technique is high in biological concentration and good in environmental adaptability, successful application of the immobilization microorganism technique in rural water environment control can be achieved.

Description

technical field [0001] The invention belongs to the field of ecology and environmental protection, and relates to an in-situ treatment method for farmland receding water, in particular to a method for removing nitrogen, phosphorus and organic matter in farmland receding water by using a multi-layer immobilized material of surrounding bio-adhesive compound bacterial flora. Background technique [0002] my country is a large agricultural country with a vast rural area and a large population of farmers. China is also a big country in the world in the use of pesticides, chemical fertilizers and agricultural film. The amount of pesticides used per unit area is three times the world's average level. After a large amount of nitrogen fertilizers, phosphorus fertilizers, antibiotics and pesticides enter the surface water body, it will cause "water body eutrophication" or "water body eutrophication" "Algae disaster" outbreak, release of algal toxins and other serious consequences. ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/30C02F101/10C02F101/16C02F101/30C02F101/22
CPCC02F3/34C02F3/30C02F2101/105C02F2101/16C02F2101/30C02F2101/22
Inventor 陈宏涂智周璐韦燕霄余关龙韩智明刘志华王泓黄金权宿忆萌
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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