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Bio-floating bed for in-situ reduction of water body heavy metal pollution

A biological floating bed and heavy metal technology, applied in the field of biological floating bed, can solve the problems of inability to purify water in time, heavy metal pollution, long ecological restoration system cycle, lack of universality, etc. The effect of improving the removal efficiency

Inactive Publication Date: 2015-02-18
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biological treatment is effective, cheap, and easy to implement, but it lacks the universality of wide application, and it takes a long time to build a stable ecological restoration system, and it cannot purify heavy metal pollution in water in a timely manner.

Method used

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  • Bio-floating bed for in-situ reduction of water body heavy metal pollution

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Effect test

Embodiment 1

[0035] Using the biological floating bed of the present invention, the activated sludge obtained from the urban sewage treatment plant and the oxygen-releasing filler are mixed in a mass ratio of 5:1, and then chlorella is added thereto to form the biological floating bed filler, wherein the oxygen-releasing filler is calcium peroxide and phosphoric acid A mixture of calcium bone cement with a weight ratio of 1:3. The filler can achieve a stable microaerobic environment for one year without replacement, and at the same time, a permanent magnet is set on the shell of the biological floating bed to maintain a high concentration of magnetotactic bacteria. Solanum nigrum, a hyperaccumulator plant capable of enriching cadmium, was selected and planted in a biological floating bed filler with a plant density of 20 plants / square meter to form a biological floating bed of hyperaccumulator plant-high magnetotactic bacteria concentration association. The biological floating bed is place...

Embodiment 2

[0037] Using the biological floating bed of the present invention, the activated sludge obtained from the urban sewage treatment plant and the oxygen-releasing filler are mixed in a mass ratio of 5:1, and then chlorella is added thereto to form the biological floating bed filler, wherein the oxygen-releasing filler is calcium peroxide and phosphoric acid A mixture of calcium bone cement with a weight ratio of 1:3, the filler can achieve a stable microaerobic environment for one year without replacement, and a permanent magnet is set on the shell of the biological floating bed to maintain a high concentration of magnetotactic bacteria. Select centipede grass, a super-accumulator plant that can enrich arsenic, plant it in the biological floating bed filler, and the plant density is 20 plants / square meter to form a biological floating bed of hyper-accumulative plant-high magnetotactic bacteria concentration combination. The biological floating bed is placed in the water body pollu...

Embodiment 3

[0039] Using the biological floating bed of the present invention, the activated sludge obtained from the urban sewage treatment plant and the oxygen-releasing filler are mixed in a mass ratio of 5:1, and then chlorella is added therein to form the biological floating bed filler, wherein the oxygen-releasing filler is sodium percarbonate and clay With a weight ratio of 1:4, the filler can achieve a stable microaerobic environment for nearly half a year without replacement, and at the same time, a permanent magnet is set on the shell of the biological floating bed to maintain a high concentration of magnetotactic bacteria. Select Sedum sedum, a super-accumulator plant that can enrich lead, and plant it in a biological floating bed filler with a plant density of 20 plants / square meter to form a biological floating bed that combines hyper-accumulator plants with high concentrations of magnetotactic bacteria. The biological floating bed is placed in the water body polluted by lead....

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Abstract

The invention discloses a bio-floating bed for in-situ reduction of water body heavy metal pollution. The bio-floating bed comprises a housing (2), a filler bed (3) accommodated in the housing (2), hyper-accumulator plants (1) which grow on the filler bed (3) and magnetotactic bacteria accumulated in the filler bed (3). The invention also discloses a method for in-situ reduction of water body heavy metal pollution by virtue of the bio-floating bed. The method comprises the following steps: a, arranging the bio-floating bed in the water body polluted by heavy metal; b, accumulating the heavy metal by virtue of chlorella, magnetotactic bacteria and the hyper-accumulator plants; c, regularly harvesting the hyper-accumulator plants to remove the accumulated heavy metal. By the bio-floating bed and the method disclosed by the invention, the heavy metal in the water body can be cheaply, efficiently and harmlessly removed.

Description

technical field [0001] The invention relates to a biological floating bed, in particular to a super-enriched plant-microbe-oxygen-releasing filler combination biological floating bed for in-situ reduction of heavy metal pollution in water. Background technique [0002] Heavy metal pollution in water has always been one of the main water environmental problems that need to be solved urgently. The characteristics of heavy metals in water, such as retention, accumulation and mobility, increase the difficulty of water heavy metal purification. At the same time, since heavy metals are non-degradable and can be enriched in animals and plants in water bodies, and then endanger human health through food chains and other channels, how to efficiently control heavy metal pollution in water has become an urgent water treatment issue. [0003] The technologies currently used to purify heavy metal pollution in water mainly include physical treatment methods, chemical treatment methods and...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34C02F3/12C02F1/62
CPCC02F3/32C02F3/325C02F3/34C02F2101/20Y02W10/10
Inventor 刘永毛国柱梁中耀董菲菲王艺淋
Owner PEKING UNIV
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