Preparation method of modified clay and application method of modified clay in directional recovery of microalgae

An application method and clay technology are applied in the application of directional recovery of microalgae and the preparation of modified clay to achieve the effect of improving removal efficiency

Pending Publication Date: 2020-08-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after this kind of mixture settles to the bottom of the water body, algae will still remineralize and release nutrients, which cannot solve the problem of water eutrophication from the source.

Method used

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  • Preparation method of modified clay and application method of modified clay in directional recovery of microalgae
  • Preparation method of modified clay and application method of modified clay in directional recovery of microalgae
  • Preparation method of modified clay and application method of modified clay in directional recovery of microalgae

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Effect test

Embodiment 1

[0026] To prepare the modified clay, the modifier used is polyaluminum chloride (PAC). Put kaolin and PAC with a mass ratio of 5:1 into the reactor, add a certain amount of deionized water, fully stir, mix evenly, and prepare a modified clay suspension. After aging for 24 hours at room temperature, centrifuge, Dry and sieve to obtain modified clay for future use.

[0027] A eutrophic water body (the algal species is Prorocentrum donghaiense), with a length of 2 meters, a width of 3 meters and a depth of 1 meter. The concentration of algae cells is about 3×10 8 cell / L. Such as figure 1 As shown, the modified clay is evenly sprayed into the water area, about 1.0g / L, the modified clay forms flocculation in the water body, and adsorbs algae cells, and forms flocculation in the water. Then if figure 2 As shown, the nano-iron powder (0.1g / L) is evenly sprinkled into the water body according to the proportion, and is flocculated and combined with the water body. Such as imag...

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Abstract

The invention discloses a preparation method of modified clay and an application method of the modified clay in directional recovery of microalgae, and relates to the field of biology. The method comprises the following steps: putting a modifier and clay into a reactor, adding a certain amount of deionized water, fully stirring, and uniformly mixing to prepare a modified clay turbid liquid; afteraging for a period of time at a certain temperature, centrifuging, drying and sieving to obtain the modified clay. The application method includes spraying the modified clay into a eutrophic water body to form floccules in the water body, and adsorbing algae cells; then scattering iron powder particles into the water body to form an iron-containing clay-algae cell floccule composite with the floccules already formed in the water body; and finally, putting an electromagnetic recovery device into the water body, electrifying to enable the device to have magnetism, attracting the iron-containingclay-algae cell floccule composite to the outer wall of the device, taking out the floccule composite from the water body, and collecting the floccule composite. Algae adsorbed by the clay is recycledashore, nutrient salt is prevented from being released again after algae cells settle, and meanwhile the removal efficiency is improved after clay modification.

Description

technical field [0001] The invention relates to the field of biology, in particular to a preparation method of modified clay and an application method for directional recovery of microalgae. Background technique [0002] Clay is a sticky soil with few sand particles, and it is not easy for water to pass through it, so it has good plasticity. Clay minerals have plasticity after being wetted with water, can be deformed under small pressure and can maintain their original shape for a long time, and have a large specific surface area, and the particles are negatively charged, so they have good physical adsorption and surface chemical activity. The ability to exchange, so it has good adsorption and sedimentation in water. [0003] Nowadays, the problem of water environmental pollution is gradually aggravating. Water bodies often experience large-density harmful microalgae blooms and cause the death of a large number of fish. These are all related to eutrophication of water bodie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40C02F1/52
CPCC01B33/40C02F1/5236
Inventor 李纪高咏卉暴雅琳于源
Owner SHANGHAI JIAO TONG UNIV
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