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Reagent for preventing or reducing scum generation

A technology of scum and powder, which is applied in the field of reagents used to prevent or reduce the generation of scum, which can solve the problems such as difficulty in suppressing scum, and achieve the effect of active activity and promotion of decomposition

Active Publication Date: 2012-06-06
环境保全株式会社 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, according to the research of the present inventors, it is found that it is difficult to suppress the generation of scum even if a conventional sediment improving agent containing granular materials of bitter soil system is added to fresh water areas such as rivers.

Method used

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  • Reagent for preventing or reducing scum generation
  • Reagent for preventing or reducing scum generation
  • Reagent for preventing or reducing scum generation

Examples

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Embodiment 1

[0028] According to a conventional method, milk of lime was poured into seawater to prepare a magnesium hydroxide slurry, and the obtained slurry was washed, filtered, and dried to obtain magnesium hydroxide powder having a purity of 95.0% by mass or more in terms of magnesium oxide. The obtained magnesium hydroxide powder was press-molded to a granular product with a particle diameter of 5 to 10 mm, and then fired at a temperature of 1800° C. using a rotary kiln to obtain a granular fired product (slag) of magnesium oxide. The obtained magnesia slag was classified by a sieve with a mesh size of 0.75 mm, and a dead-burned magnesia powder having properties shown in Table 1 below was obtained under the sieve. The average particle size in the following table 1 is to use the sieves with meshes of 1.00mm, 0.50mm, 0.30mm, 0.15mm, 0.075mm, and 0.045mm, and use the sieving method to measure the particle size distribution, and make the cumulative distribution curve of the part on the si...

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PUM

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Abstract

The invention relates to reagent for preventing or reducing scum generation and provides a method for preventing or reducing scum generation in water containing corruptive wastes, which comprises the step of adding dead-burned magnesia powder into the water.

Description

technical field [0001] The present invention relates to agents for preventing or reducing the formation of scum in water containing putrefactive wastes. The invention also relates to a method for preventing or reducing scum formation in water containing putrefactive waste. Background technique [0002] In fresh waters such as rivers, creeks (small streams), lakes, ponds (ponds) and sewers where corrupted wastes corrupted by bacteria in the water flow into them, corrupted wastes accumulate at the bottom, and most of them form extremely soft sludge. When the spoilage waste in these sludges is spoiled by anaerobic bacteria such as sulfate-reducing bacteria and methanogens, gases such as hydrogen sulfide and methane gas are produced from the sludge, and these gases are formed together with part of the sludge. The scum (floated sludge) floats on the surface of the water and causes bad smell to the surrounding area. [0003] As a bottom mud improving agent (bottom quality improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 明石一三
Owner 环境保全株式会社
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