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Modified clay system for controlling harmful algae blooms in culture water body

A technology for cultivating water bodies and clay, applied in water/sewage treatment, water treatment parameter control, water/sludge/sewage treatment, etc., can solve problems such as low flocculation efficiency, excessive sludge volume, and reduced water transparency. Improve the effectiveness of the removal effect

Active Publication Date: 2018-05-04
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the clay method has a good effect in the control of algal blooms, the flocculation efficiency is low and the amount of use is large, which is likely to cause problems such as reduced water transparency and excessive sludge.

Method used

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  • Modified clay system for controlling harmful algae blooms in culture water body
  • Modified clay system for controlling harmful algae blooms in culture water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepare samples for processing:

[0023] The composite modified clay system I for the control of harmful algal blooms in aquaculture water is prepared by mixing and grinding kaolin, polyaluminum chloride and tannic acid, wherein kaolin: polyaluminum chloride: tannin = 5:1:1;

[0024] The composite modified clay system II for the control of harmful algal blooms in aquaculture water is prepared by mixing and grinding kaolin, aluminum sulfate and tannic acid, wherein kaolin: aluminum sulfate: tannin = 5:1:1;

[0025] The compound modified clay system obtained above for the control of harmful algal blooms in aquaculture water is mixed with seawater to form a uniform suspension, and the corresponding concentration is prepared for different algal bloom organisms to be removed and sprayed on the surface of the algal bloom water body. After 3 hours of natural settlement, Can effectively remove algal blooms (see figure 1 ).

[0026] Utilize above-mentioned obtained sample to m...

Embodiment 2

[0028] The composite modified clay system Ⅰ for the control of harmful algal blooms in aquaculture water is prepared from clay, polyaluminum chloride and tannin; their respective mass ratios are clay: polyaluminum chloride: tannin = 20:4:X , X=1, 2, 3, 5, 10.

[0029] Utilize the above-mentioned obtained modified clay to measure its removal effect to Prorocentrum donghaiense: in the liquid of Prorocentrum donghaiense (cell density 2.3×10 5 cells / mL) were added respectively to obtain the above-mentioned modified clay, so that the concentration of clay in the algae liquid was 0.2g / L, after shaking up and standing still for 3 hours, measure its efficiency of removing algal bloom organisms (such as figure 2 shown), the results show that the amount of tannin has a great influence on the algae removal effect of the composite modified clay system, and the removal efficiency gradually increases with the increase of the amount of tannin.

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Abstract

The invention belongs to the technical field of preventing and control of harmful algae blooms, and particularly relates to a modified clay system for controlling harmful algae blooms in a culture water body. The modified clay is prepared from the following components in parts by weight: 10 to 50 parts of inorganic aluminum salt, 1 to 20 parts of tannin and 50 to 90 parts of clay minerals; in theuse process, the composite modified clay is pre-mixed with seawater to form a uniform turbid suspension; then, the turbid suspension is sprayed to the surface of the algae bloom at certain concentration, so as to reach the effect of quickly eliminating the excessive algae bloom organisms in the water body. The composited modified clay has the characteristics that the sources of materials are wide,the operation is simple, convenient and rapid, the efficiency is high, and the like.

Description

technical field [0001] The design of the invention belongs to the technical field of prevention and control of harmful algal blooms, and specifically relates to a modified clay system for controlling harmful algal blooms in aquaculture water. Background technique [0002] Harmful algal blooms (Harmful Algal Blooms, HABs) are a kind of abnormal proliferation phenomenon in which microalgae produce algal toxins or increase biomass, affect the growth of other organisms and the normal food chain structure, and endanger the ecological environment and human health. In recent years, harmful algal blooms have occurred frequently in my country's coastal waters, and the scope and duration of their influence have continued to increase. The marine environment has been seriously damaged, posing serious threats to marine fisheries, aquaculture, tourism, and human health. In order to effectively reduce the harm caused by harmful algal blooms, especially in some aquaculture areas, landscape ...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/54C02F1/56C02F1/50C02F101/20
CPCC02F1/50C02F1/5236C02F1/5245C02F1/5263C02F1/54C02F1/56C02F2101/20C02F2209/10
Inventor 俞志明邱丽霞曹西华宋秀贤袁涌铨吴在兴贺立燕
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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