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Method for restoring eutrophic water body

A technology for eutrophication and water restoration, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. Long-term problems, to avoid the risk of secondary pollution, improve the oxidation-reduction potential, and achieve the effect of resource recycling

Active Publication Date: 2020-02-21
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for repairing eutrophic water bodies include: external aid blocking, internal source control, water quality purification, ecological restoration, etc., but most of the methods have limited restoration effects on eutrophic water bodies. Not only the treatment time is long, but the restoration methods It is complicated, requires special mechanical dosing, consumes a lot of financial and material resources, and cannot completely solve the problem of eutrophication water pollution. After treatment, the water body is easy to rebound, and eutrophication phenomenon reappears

Method used

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  • Method for restoring eutrophic water body
  • Method for restoring eutrophic water body
  • Method for restoring eutrophic water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Drug composition:

[0032] A eutrophication water restoration agent, which is composed of the following components by mass: 10% water, 20% calcium peroxide, 20% biomass charcoal powder, 20% composite bacterial agent, 5% calcium hydroxide, 5% calcium oxide % and ordinary Portland cement 20% (the ordinary Portland cement is made up of tricalcium silicate: dicalcium silicate: tricalcium aluminate: tetracalcium aluminoferrite, and its mass ratio is 10:5:3: 2).

[0033] Wherein said biochar powder is prepared by the following method:

[0034] The reed straw is crushed by a pulverizer, passed through a 20-80 mesh sieve to obtain biochar powder, soaked in 2%-4% NaOH solution, the solid-to-liquid ratio is 1:10-1:20, and the soaking time is 10-24 hours after soaking Rinse with deionized water until neutral, dry naturally to constant weight to get powdery biochar powder.

[0035] Wherein said composite bacterial agent is prepared by the following method:

[0036] Collect 40 mL ...

Embodiment 2

[0043] Embodiment 2 (actual engineering test)

[0044] Baiyangdian eutrophication water body in-situ restoration test case:

[0045] Background: Due to the rapid development of industry and agriculture and the rapid increase of population in the Baiyangdian Lake Basin, the waters of Baiyangdian Lake are polluted and the eutrophication is serious.

[0046] Step 1 (investigate and determine the eutrophication water body): Select a square water area with a length and width of 50m at the shore of the Baiyangdian Lake water area to measure the water samples. The obtained data are shown in Table 1 below. It can be seen that the Total phosphorus, total nitrogen, oxidation-reduction potential (ORP) and dissolved oxygen of the overlying water body do not meet the standards of normal water body, so the water area surrounded by the square is eutrophic water body.

[0047] Table 1 Water quality data table of a point in Baiyangdian Lake:

[0048] Total Nitrogen (mg / L) Total...

Embodiment 3

[0062] Hydrostatic leaching test:

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Abstract

The invention discloses a method for repairing an eutrophic water body. The method comprises the following steps: 1, preparing an eutrophic water body repairing agent from water, an oxygen release agent, biomass charcoal powder, a composite microbial agent, an alkaline agent and a binder; and 2, applying the eutrophic water body repairing agent to the eutrophic water body. The method for repairingthe eutrophic water body has the advantages of high removal rate, low cost, environmental friendliness and the like, and the eutrophic water body can be efficiently and durably repaired.

Description

technical field [0001] The invention belongs to the field of water environment restoration, and in particular relates to a restoration method for eutrophic water bodies. Background technique [0002] With the rapid development of industry and agriculture, a large amount of industrial wastewater containing nitrogen and phosphorus, domestic sewage, and even untreated sewage are directly discharged into rivers, causing eutrophication in some rivers. The eutrophication of water body is caused by the excess of nutrients (such as nitrogen, phosphorus, etc.) in the water body, which leads to the excessive proliferation of algae, the reduction of dissolved oxygen content in the water body, the massive death of aquatic organisms, and the deterioration of water quality. The eutrophication of water not only leads to the destruction of the river ecosystem, but also affects people's production and life. Therefore, the restoration of eutrophic water has become an urgent water environment ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/30
CPCC02F3/302C02F3/34
Inventor 王颖莫华涛郭鹏飞
Owner BEIJING NORMAL UNIVERSITY
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