JPH1190112A - Flocculation and sedimentation agent for sewage clarification - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a flocculation settling agent for sewage clarification capable of effectively accelerating solid-liquid separation without requiring large-scale treatment facilities and large operation cost by flocculating and sedimentating muddy water of a river or waste water from a plant in a short time. SOLUTION: A sedimentation agent consisting essentially of SiO2 , CaO, Al2 O3 and Fe2 O3 is mixed with a trace element to obtain the objective flocculation and sedimentation agent for sewage clarification. This flocculation and sedimentation agent consists preferably of 40% SiO2 , 25% CaO, 20% Al2 O3 , 5% Fe2 O3 and 10% trace element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a coagulating sedimentation agent for purifying sewage, which coagulates and sediments muddy water of rivers and wastewater from factories to promote solid-liquid separation.

[0002]

2. Description of the Related Art In recent years, global environmental problems due to water pollution have become a global problem. Various research and developments have been made to purify muddy water of rivers and lakes, and wastewater from plating and dyeing factories. I have.

[0003] At present, no decisive treatment means for purifying a large amount of muddy water in rivers and lakes has been developed, and only water cans and driftwood floating on the surface of water are collected and treated using boats. I have.

In the case of treating wastewater in a plating plant or a dyeing plant, large-scale equipment is introduced, and the wastewater is purified in multiple stages by means of electrolysis or chemical treatment. .

[0005]

However, even if the cans and driftwood floating on the water surface of rivers and lakes are collected and treated, the water pollution is not completely eliminated, and the external environment and resources are improved. It only contributes to recycling.

Further, the method of purifying industrial wastewater by electrolysis requires a large-scale treatment facility and enormous operating costs. Further, in the case of performing a purification treatment using a chemical, a problem arises in disposal of the residue of the chemical after the treatment.

SUMMARY OF THE INVENTION In view of the above, the present invention effectively eliminates large-scale treatment facilities and enormous operating costs by coagulating sedimentation of river muddy water and wastewater from factories in a short period of time. It is an object of the present invention to provide a coagulating sedimentation agent for purifying sewage, which is capable of accelerating wastewater.

[0008]

According to the present invention, in order to achieve the above object, silicon oxide (SiO ₂ ), calcium oxide (CaO), aluminum oxide (AL ₂ O ₃ )
It is an aggregating sedimentation agent for sewage purification obtained by mixing trace elements with a sedimentation agent containing iron oxide (Fe ₂ O ₃ ) as a main component.

[0009] The precipitant is silicon oxide (SiO 2).
₂ ) 40%, calcium oxide (CaO) 25%, aluminum oxide (AL ₂ O ₃ ) 20%, iron oxide (Fe)
₂ O ₃ ) is 5% and trace elements are 10%.

[0010] With the above structure, the sedimentation agent is administered to muddy water or wastewater and stirred gently, so that sludge and dyes are coagulated and settled in a short time, and solid-liquid separation can be promoted. Further, since the sedimentation agent of the above-mentioned composition contains a natural material as a main component, it is possible to return the treated sediment to the soil.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventor of the present invention completed the present invention by blending the following materials as a result of extensive studies by the present inventor on the coagulating sedimentation agent for sewage purification of the present invention.

The precipitant 1 comprises silicon oxide (SiO ₂ ),
Calcium oxide (CaO) and aluminum oxide (AL
₂ O ₃ ) and a sedimentation agent containing iron oxide (Fe ₂ O ₃ ) as a main component and a trace element.

Further, as a result of a number of experiments, the following sedimentation ratio was found for the sedimentation agent 1 during intensive studies.

[0013] Silicon oxide (SiO ₂ ) 40%, calcium oxide (CaO) 25%, aluminum oxide (AL ₂ O)
₃ ) 20%, iron oxide (Fe ₂ O ₃ ) 5%, trace element 10
% Is preferable.

Next, an experimental method and an effect of the coagulating sedimentation agent for sewage purification of the present invention will be described with reference to FIGS. 1 (a), 1 (b) and 1 (c). In addition, as the wastewater used in the experiment, repeated experiments using various wastewater such as muddy water of general rivers and lakes and wastewater discarded from textile dyeing factories,
Solid-liquid separation was successfully completed in a short time.

As shown in FIG. 1 (a), sewage 2 is put in a container 3, and a sedimentation agent 1 of the present invention is administered and lightly stirred.

After a few seconds, the impurities 4 in the sewage 2 are combined with the sedimentation agent 1 and solid-liquid separation is started to cause coagulation and sedimentation. (B)

After 10 to 15 seconds, the impurities 4 in the sewage 2 precipitate as sediment 5 at the bottom of the vessel 3 and are completely separated from the purified water 6 at the top by solid-liquid separation.

The time required for solid-liquid separation slightly changes depending on the concentration of the impurity 4 in the wastewater 2 and the dose of the settling agent 1.

[0019]

As described above, the coagulating sedimentation agent for sewage purification of the present invention has the following effects by adopting the above-mentioned constitution.

Since impurities such as sludge and dyes are coagulated and settled in a short time, solid-liquid separation can be effectively promoted.
It does not require a large capital investment and can purify various sewage such as muddy water of general rivers and lakes, and wastewater discarded from textile dyeing factories.

Further, since the sedimentation agent contains a natural element as a main component, it is possible to return the treated sediment to the soil, which can contribute to the improvement of the global environment.

[Brief description of the drawings]

1 (a), 1 (b) and 1 (c) show an experimental method and an effect of the flocculating and settling agent for sewage purification of the present invention.

[Explanation of Signs] 1 ... sedimentation agent 2 ... sewage 3 ... container 4 ... impurities 5 ... sediment 6 ... purified water

Claims (2)

[Claims] Claims: 1. A silicon oxide (SiO ₂ ), a calcium oxide (CaO), and an aluminum oxide (AL ₂ O ₃ )
And a precipitant containing iron oxide (Fe ₂ O ₃ ) as a main component,
Coagulating sedimentation agent for sewage purification obtained by mixing trace elements. 2. The method according to claim 1, wherein the precipitant is silicon oxide (Si).
O ₂ ) 40%, calcium oxide (CaO) 25%, aluminum oxide (AL ₂ O ₃ ) 20%, iron oxide (Fe ₂ O)
₃ ) The coagulating sedimentation agent for sewage purification according to claim 1, wherein a mixing ratio of 5% and trace elements is 10%.