JPH0775644B2 - Waste liquid treatment method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating waste liquid such as antifreeze liquid containing water.

[0002]

2. Description of the Related Art Waste fluids such as engine oil and antifreeze are increasing year by year.
Kioiru is estimated to be 30,000. One of the techniques conventionally adopted as these treatment methods is incineration, but handling is troublesome because the waste liquid is a liquid. Therefore, it is conceivable to solidify these waste liquids prior to treating the waste liquids.

As a technique for solidifying a waste liquid containing water as a main component, it has been known to use a water-absorbing resin.
This resin is an acrylic polymer.

[0004]

However, even if such a water-absorbent resin is mixed in a waste liquid containing fats and oils and other impurities, the water-absorbing speed and the water-absorbing ability are lowered and a good solidified state cannot be obtained.

For these reasons, development of a treatment technique capable of obtaining a good solidified state even for a waste liquid containing fats and oils or impurities in water or a waste liquid containing no water is desired.

The present invention has been made in view of the above circumstances, and is a treatment technique capable of obtaining a favorable solidified state even for a waste liquid containing fats and oils or impurities in water or a waste liquid containing no water. It is intended to provide.

[0007]

To solve this problem, the waste liquid treatment method of the present invention is applied to a treatment liquid containing water.
0.1 / 100 to 40/100 of the volume of the liquid to be treated is mixed with the ionic adsorbent, and then the volume of the liquid to be treated is mixed.
The water-absorbing acrylic polymer of 0.5 / 100 to 300/100 is mixed and stirred to be solidified .

[0008]

[Operation] An ion adsorbent is mixed in the liquid to be treated. Next, the water-absorbent acrylic polymer is mixed and stirred.

The mixture of water, the target liquid, the water-absorbent acrylic polymer and the ionic adsorbent gradually becomes viscous and solidifies with stirring.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings showing an embodiment. FIG. 1 schematically shows the process steps. That is, as shown in FIG. 1, first, the target liquid 1 to be treated is put into the container 2 (FIG. 1 (a)). The liquids to be treated include surfactants, antifreeze liquids, brake liquids and engine oils.

The liquid to be treated is mixed with the ion adsorbent 3 and stirred (FIG. 1 (c)). As the ion adsorbent, it is possible to use a material capable of adsorbing ions in water, for example, diatomaceous earth, zeolite, activated carbon, silica gel, calcium carbonate, etc. When water 4 is mixed in the liquid, the total amount of the mixture of the target liquid and water 4) is 0.1 / 100 to 40 /
100, preferably 1/100 to 10/100.

To the target liquid 1 containing no water 4, the water 4 is mixed and stirred prior to the mixing of the ion adsorbent 3 (FIG. 1 (b)). The mixing amount is 1/10 to 3 times, and preferably about 1/3 to the same amount of the liquid to be treated in terms of volume ratio.

Next, the water-absorbent acrylic polymer 5 such as acrylic acid ester is mixed and stirred (FIG. 1 (d)). Examples of commercially available products of such a water-absorbent acrylic polymer include "AQUA KEEP" manufactured by Iron Chemical Industry Co., Ltd., "AQUALIC CA (trademark) manufactured by Nippon Shokubai Chemical Industry Co., Ltd." and the like. is there. The mixing amount is 0.5 / 100 to 3 times the volume of the target liquid, preferably about 1/20 to the same amount by volume.

The above operation is performed at room temperature. The mixture of water, the target liquid, the water-absorbent acrylic polymer, and the ion adsorbent gradually increases in viscosity with stirring and solidifies (see FIG. 1).
(E)).

(Experimental example) (1) Sample Antifreeze (stock solution) JIS K 2234 applicable product Ethylene glycol 90 to 95% water 2 to 4% Rust preventive (salts) 2 to 8% AquaKeep 10SH (high water absorption) Acrylic polymer) Made by Steel Chemical Co., Ltd. Made by Diatomaceous earth Made by Kukida Pharmaceutical Co., Ltd. Water ... Tap water

(2) Operation 50 ml of an antifreeze solution of each concentration is added to a 100 ml beaker.
gr measure. Add the required amount of diatomaceous earth while stirring the beaker. Then, add the required amount of AquaKeep 10SH and
Stir for minutes.

(3) Results The results are shown in Tables 1 and 2 below.

[0018]

[Table 1]

[0019]

[Table 2]

Description of A, B and C in the table A ... Checking of separation state of liquid State after 10 seconds when the mixture is placed on a qualitative filter paper Evaluation point 1 ... Penetration and spread of liquid are observed. 2 ... Although the liquid penetrates, no spread is seen. 3 ... There is no liquid penetration. B ... Check of fluidity State when the beaker containing the mixture is laid down. Evaluation point 1 ... The mixture moves 2 cm or more in 10 seconds. 2 ... Mixture moves within 2 cm in 10 seconds. 3 ... There is no movement of the mixture. C ... Checking hardness 30 when a weight of 20 gr is gently placed on the surface of the mixture
State after 2 seconds Evaluation point 1 ... The weight penetrates into the mixture. 2. Part of the weight penetrates into the mixture. 3 ... No intrusion of the weight into the mixture is observed.

(4) Evaluation The evaluation score of 3 is easy to handle after solidification of the antifreeze liquid-containing cooling water, and is the purpose of this time. Aqua-Keep 10SH alone, Aqua-Keep 1
Even if 0SH was added in an amount of 1 to 9%, the intended solidification could hardly be achieved. AquaKeep 10SH by mixing diatomaceous earth
Was added in an amount of 1% or more, it became possible to solidify the cooling water containing the antifreeze liquid. If the diatomaceous earth was 3% or more, the desired solidification was possible.

[0022]

According to the waste liquid treatment method of the present invention, a good solidified state can be obtained even for waste liquids containing fats and oils or impurities in water or waste liquids not containing water, and handling in the case of disposing of waste liquids. Will be easier.

[Brief description of drawings]

FIG. 1 is a process explanatory view showing a waste liquid treatment process of the present invention.

[Explanation of symbols]

 1 Target Liquid 2 Container 3 Ion Adsorbent 4 Water 5 Water Absorbing Acrylic Polymer

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location C09K 3/32 C10M 177/00 9159-4H

Claims (2)

[Claims] 1. A treatment target liquid containing water is treated in a volume ratio.
0.1 / 100 to 40/100 of the target liquid is mixed, and then 0.5 / 1 of the target liquid is treated in volume ratio.
A method for treating waste liquid , which comprises mixing and agitating a water-absorbing acrylic polymer of 0 to 300/100 to be solidified . 2. The method for treating waste liquid according to claim 1, wherein the liquid to be treated is an antifreeze liquid.