JPS62234511A - Flocculating agent for precipitation - Google Patents

Abstract

PURPOSE:To obtain a flocculating agent which removes the org. materials dissolved in water and has a sterilization effect as well from the salt obtd. by treating vermiculite, etc., with an aq. hydrochloric acid soln. CONSTITUTION:This flocculating agent consists essetially of many kinds of the metalallic salts and nonmetallic salts obtd. by dissolving the vermiculite generated from weathering of mica ore or the soil generated from the further weathering of the vermiculite into the aq. hydrochloric acid soln. This flocculating agent is capable of easily decreasing the BOD value in the water to a specified value or below by insolubilizing and flocculating the org. materials dissolved in the water. Said agent has a sterilization function as well.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention is a method for precipitating (insolubilizing) organic substances dissolved in water.
This invention relates to an additive that causes flocculation (hereinafter referred to as a precipitation flocculant).

"Prior Art and its Problems" Treatment of organic substances such as proteins, amino acids, hydrocarbons, and fatty acids dissolved in wastewater is mostly carried out by an activated sludge method. However, since this method requires microorganisms to decompose organic matter, in order to keep the microorganisms alive and active, the PI3 temperature and organic matter concentration of the wastewater must be maintained within a certain range, and aeration must be performed. However, even with such complicated operations, there was always the risk that microorganisms would die and wastewater treatment would stop. Moreover, this method has some drawbacks, such as requiring a large area and large equipment, but until now there has been no effective alternative method, so it is currently being adopted out of necessity. It is.

In addition, if organic matter dissolved in water can be precipitated and coagulated, rainwater, river water, etc. can be immediately purified and made into drinking water, making it ideal for camping and other outdoor activities. This is convenient because you don't have to bring along a water bottle, which has a limited amount.

The present invention has been made with attention to these points, and provides a precipitation flocculant that can insolubilize and remove organic matter dissolved in water and also has a bactericidal action. ``Means for Solving Problems'' In order to achieve the above object, the present inventors have conducted extensive research and found that vermiculite in which mica-based minerals have weathered or soil in which this vermiculite has further weathered is treated with an aqueous solution of hydrochloric acid. An acidic additive containing various metal salts and non-metal salts as main components, which are obtained by dissolving organic substances, becomes an extremely effective precipitation flocculant that insolubilizes and aggregates organic substances, and also has a bactericidal effect. They discovered this and arrived at the present invention.

As the mica-based mineral used in the present invention, it is preferable to use black mica in view of its precipitation and flocculation action. That is, it is particularly preferable to use black mica vermiculite as a raw material and soil in which this vermiculite has been further weathered. .

To produce the acidic additive used in the present invention.

For example, vermiculite with weathered black mica has 25
z Hydrochloric acid aqueous solution, vermiculite: Hydrochloric acid aqueous solution, 4
: Add at a weight ratio of 3 to 5 and leave for several hours at room temperature or under heating with occasional stirring. In this way, Si, AI, Mg, Fe, K in the raw materials
, elements such as Ha and oxides are eluted into the hydrochloric acid aqueous solution,
Hydrochlorides, oxides, double salts, and complex salts of the above metals and nonmetals are produced. Furthermore, in addition to the above, Li, Z, which are contained in the raw materials as elements or oxides, although in W& amounts.
Hydrochlorides of r, V, Xi, Go, P, Ba, S, etc. are also produced, but no harmful heavy metals are present. The aqueous solution thus obtained is used as the acidic additive of the present invention as it is or after being concentrated or diluted.

The water to be treated that is the object of the present invention is not particularly limited, but 1
Examples include kitchen wastewater, food processing industry wastewater, livestock wastewater, paper manufacturing wastewater, and the like. In addition, since the precipitation and flocculant of the present invention also has a bactericidal effect, fresh water from ponds, swamps, lakes, etc. and rainwater can be used to purify and sterilize drinking water. It can be suitably used as a bath water purifying agent or as a bath water purifying agent that purifies bath water by 19 m.

The amount of acidic additive added to the treated water is the amount of the treated water!
4g! 4. It varies depending on the concentration, heat saving of pretreatment, etc.
Generally, 0.01 to 10 g, particularly 0.1 to Ig, of solid matter after concentration and drying is used per 100 cc of water to be treated.

When an acidic additive is added to the water to be treated and, if desired, neutralized with an alkali, carbon dioxide gas, which is thought to be due to the decomposition of organic matter, is generated, and flocs float to the surface of the liquid. The flocs settle out over time and the liquid becomes clear. The floc may be filtered through a leakage material such as calcined vermiculite, zeolite, activated carbon, or the like.

"Examples" Next, the present invention will be further explained with reference to Examples, but the present invention is not limited to these Examples.

Example 1: Production example of precipitation flocculant 5i0235.7EiL At20318.70%,
Fe20318.30%, 100.42%, Mg07.
82%, Ca01.40%, Ha2el-02%,
When a 25% hydrochloric acid aqueous solution is added to Japanese vermiculite, which has weathered black mica containing 1% K2O3 and El, and is left for several days while stirring, the A1. M.

, Fe, K, Ha, Rb, and other elements and oxides are eluted into the aqueous hydrochloric acid solution to become hydrochlorides and oxides of the metals and nonmetals mentioned above. These are thought to be produced as simple hydrochlorides and oxides, as well as double salts and complex salts. Furthermore, in addition to the above, Li, Zr, V, former, and Go are contained in the raw materials as elements or oxides, although in trace amounts.

Hydrochlorides of P, Ti, Ba, etc. are also produced.

The acidic liquid containing the hydrochloride salts obtained as described above is dried together with the sand-like material that is the residue of the raw material to obtain a solid flocculant. The solid flocculant contains a total of about 25% of various metal salts.

and 25% of 100Kg for 100Kg of the above raw materials.
Add an aqueous hydrochloric acid solution to generate an acidic solution containing salts and residual liquid.

Next, after evaporating a part of this water to 120 kg,
After adding 80 kg of water to make an aqueous solution of 200 kg, which is twice the amount of the raw material, the remaining liquid is filtered to obtain a liquid flocculant.

Instead of allowing the reaction to stand at room temperature, it was heated to 100° C. for 1 hour and carried out as in the above example with similar results.

Examples 2 to 3: Example of use of precipitated flocculant After the treated water listed in Table 1 is coarsely filtered to remove solids, the flocculant listed in Example 1 is added in the proportions listed in Table 1. did. The precipitated aggregates were removed through nocumiculite, and the filtrate was subjected to various measurements, and the results shown in Table 1 were obtained.

Examples 4-8 Rough! ! The liquid flocculant described in Example 1 was added to the water to be treated described in Table 1, which had been subjected to a Obtained.

Table 1 Example 7 0.1 volume z of the liquid precipitation flocculant described in Example 1 was added to river water containing E. coli and organic matter, neutralized with CaO, filtered through a layer of activated carbon, ! The liquid was sampled and tested. The results are shown in the table below.

Table 2 "Effects of the Invention" As stated above, according to the precipitated flocculant of the present invention, the BOD value and CaO value in wastewater can be easily reduced to below the specified values, so that the problem of wastewater treatment can be solved by reducing woody wastewater treatment.・In addition, the precipitated flocculant of the present invention has antibacterial properties and does not contain substances harmful to the human body, so it can be used as a drinking water purification agent or as a bath water purifier. As a purifying agent for hot water, it is characterized by tremendous effects not seen in conventional drugs of this type.

Claims (2)

[Claims] (1) It is characterized by being made of an acidic additive containing various metal salts and non-metal salts as main components obtained by dissolving vermiculite in which mica-based minerals have weathered, or soil in which this vermiculite has further weathered, in an aqueous hydrochloric acid solution. A precipitating flocculant. (2) Claim 1 in which the mica-based mineral is black mica
Precipitation flocculant as described in section.