JPS5924648B2 - flocculant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to flocculants used to flocculate contaminant particles in water.

One of the commonly used flocculants is polyaluminum chloride.
Conventionally, this polyaluminum chloride has been commercially available in liquid form and powder form.

However, the liquid type has disadvantages in that it is inconvenient to carry, has unstable quality, and cannot be stored in more than one container.

On the other hand, although the quality of the powdered powder is stable, it has a deliquescent property and therefore becomes extremely inconvenient to use when exposed to air, making it difficult to store.

Further, like other flocculants, polyaluminum chloride cannot produce an effective flocculating effect even if the amount added to the raw water is too large or too small.

That is, the addition ratio to raw water that can achieve an effective flocculation effect is within a fairly narrow range.

Therefore, if the amount of raw water to be produced is small, very small amounts of polyaluminum chloride must be added in a very precisely metered manner.

However, in the conventional commercially available polyaluminum chloride,
It is extremely difficult to accurately measure extremely small amounts of polyaluminum chloride as described above, not only for liquids that must be measured with a dropper or pipette, but also for powdered products. There was a drawback that the addition ratio was extremely uncertain.

The present invention was made to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a flocculant that is convenient to carry, stable in quality, and very easy to store and measure the amount to be added.

The flocculant according to the present invention that achieves these objects is composed of a powder mixture of at least cellulose and polyaluminum chloride.

Hereinafter, the present invention will be explained based on examples.

1 part of polyaluminum chloride is sufficiently mixed with 1 part of highly pure cellulose powder in a volume ratio.

In this way, the polyaluminum chloride powder immediately deliquesces due to the humidity in the air, adheres closely to the absorbent cellulose powder, and is uniformly dispersed.

The flocculant made of the powder mixture thus obtained has various excellent properties as follows.

(b) It is in powder form, which is convenient to carry.

(b) The quality is stable and can be stored for a long time.

(c) Due to the water absorbency of cellulose, the cellulose as a whole does not exhibit deliquescent properties and maintains dispersibility, so it is easy to dissolve uniformly in water and easy to store.

(d) Since cellulose powder is fibrous, its apparent specific gravity is 0.
．． Since it is small at around 3, the present flocculant made by mixing this also has a considerably large apparent volume relative to its weight.

Therefore, when comparing the amount required to be added to the same amount of raw water in terms of volume, the amount added in the case of the present flocculant is much larger than in the case of the conventional flocculant made only of polyaluminum chloride.

Therefore, even when using this flocculant for a small amount of raw water, the required amount can be easily measured by volumetric measurement (for example, the appropriate amount can be easily measured using a small spoon with a capacity of about 5cc). ).

(e) Cellulose powder itself does not have an aggregation effect, but since it is fibrous, it functions as an aggregation aid and stabilizes the aggregation reaction.

(f) Since cellulose powder is fibrous, after agglomeration,
When performing filtration, it can be separated and removed using a relatively coarse filter, so it also functions as a filter aid, preventing clogging due to flocs and promoting filtration.

Because of these various excellent properties, the present flocculant exhibits particularly great effects in the following cases.

In other words, in the past, when trying to make murky water from rivers and ponds clear for drinking during disasters or during outdoor activities such as camping, the filter media would become clogged. I didn't get good results.

However, in the case of this flocculant, if you add, for example, about a spoonful of 0.005 cc to the turbid water 11 and stir it,
Aggregation reaction can be caused reliably.

After flocculation, if the mixture is allowed to stand still for a while, precipitation will be completed and clear supernatant water can be easily collected.

Clear water can also be easily collected by passing turbid water to which the present flocculant has been added through a filter such as coarse cloth after flocculation.

By sterilizing this clear water by boiling or other sterilization methods, drinking water can be obtained very easily from turbid water.

In the present invention, the mixing ratio of cellulose and polyaluminum chloride is not limited to the above-mentioned ratio, and an appropriate mixing ratio can be selected depending on the application and the like.

Moreover, if short fibers are used as the cellulose,
Since there is a risk of the cellulose slipping through the filter, it is preferable to use long fibers that can be easily separated and removed by the filter.

Further, in the flocculant according to the present invention, it is also possible to further mix substances other than cellulose and polyaluminum chloride.

As described above, the flocculant according to the present invention is made of a powder mixture of at least cellulose and polyaluminum chloride, so it is convenient to carry, stable in quality, and easy to store and measure the amount added. It is easy to use and provides excellent effects such as excellent flocculation effect and filtration assisting effect.

Claims (1)

[Claims] 1. A flocculant consisting of a powder mixture of at least cellulose and polyaluminum chloride.