KR960009379B1 - Compound for use of dyeing wastewater treatment - Google Patents

Abstract

The compound for waste water treatment is composed of 40-50 wt% one or more minerals selected from natrolite, laumonite, stilbite, chabazite, mesolite or thomsonite, 30-40wt% montmorillonite, 3-8wt% calcium hydroxide, 3.5-8wt% aluminum sulphate, 1.5-3.5wt% ferric sulfate and 3-15wt% catalyst agent. The compound shows not only good deodorization effect, but also can lower COD, BOD, SS and color remarkably.

Description

Dyeing Wastewater Treatment Composition

The present invention relates to a composition for treating wastewater. More specifically, it is a composition containing fluorite, montmorillonite, Calcium hydroxide, aluminum sulphate ferric sulfate, and a catalyst agent. It is about.

Wastewater from the dyeing plant is accompanied by severe odors with organic substances such as sodium carboxymethyl cellulose (C ₆ H ₉ OCH ₂ COONa), methyl cellulose (C ₆ H ₉ OCH ₃ ), dyeing, pigments, and surfactants. Since the chromaticity is large, the inflow of light and oxygen is blocked, which is a serious problem such as promoting eutrophication of water in the wastewater sublayer. Moreover, despite the large number of companies in the dyeing-related industries in Korea, and the amount of wastewater generated in these factories has reached a considerable amount, it is illegal to secure the wastewater treatment facilities and intentionally incapacitate the wastewater treatment facilities. The outflow of wastewater increases year by year, which greatly pollutes the environment.

The present inventors completed the present invention by discovering that the composition containing fluorite, montmorillonite, hydrated lime, aluminum sulfate, iron sulfate, and a catalyst exhibits a turbid effect in the treatment of dyeing wastewater. Was done.

Accordingly, it is an object of the present invention to provide a composition for treating wastewater, which contains the aforementioned components. An advantage of the composition of the present invention is that the dyeing wastewater can be easily treated in a low cost and simple method. Hereinafter, the present invention will be described in detail.

According to the present invention, there is provided a composition for treating dyeing wastewater containing the following components.

* 40-50% by weight of fluoride minerals

* Montmorillonite 30-40 wt%

[Components: SiO ₂ , Al ₂ O ₃ , Na ₂ O, etc.]

* Calcium hydroxide 3 ~ 8% by weight

[Ca (OH) ₂ ]

* Aluminum sulphate 3.5 ~ 8 wt%

[Al ₂ (SO ₄ ) ₃ · 7H ₂ O]

* 1.5 ~ 3.5% by weight of ferric sulfate

[Fe ₂ (SO ₄ ) ₃ ]

* Catalyst (catalyst) 3.0 ~ 15.0% by weight

[MgO]

Preferred composition ratios of the above components of the composition of the present invention are as follows.

45% by weight of fluoride minerals

Montmorillonite 35% by weight

[Components: SiO ₂ , Al ₂ O ₃ , Na ₂ O, etc.]

* 5% by weight of Calcium hydroxide

[Ca (OH) ₂ ]

* 5% by weight of aluminum sulphate

[Al ₂ (SO ₄ ) ₃ · 7H ₂ O]

* 2.5% by weight of ferric sulfate

[Fe ₂ (SO ₄ ) ₃ ]

* 7.5 wt% of Catalyst agent

[MgO]

The main fluoride minerals of the present invention include Natrolite [Na ₂ Al ₂ SiO ₁₀ .2H ₂ O], Laumontite [CaAl ₂ Si ₄ O ₁₂ .4H ₂ O], steel bite. _{(Stilbite) [Ca (Al 2} Si 7 O 18) · 7H 2 O], carbazole ZUID _{(Chabazite) [CaAl 2 Si 4} O 12 · 6H 2 O], methoxy solrayiteu _{(Mesolite) [Na 2 Ca 2} Al 6 Si ₉ O ₃₀ .8H ₂ O], Tomsonite [NaCa ₂ Al ₅ Si ₅ O ₂₀ .6H ₂ O], and the like. The composition of the present invention may be used with any of the fluorinated minerals listed above. It is good to use one or more types together. The fluorite minerals are inexhaustibly contained in the sub-central region of the basalt, basalt, etc., mainly composed of a fibrous or columnar radial aggregate, and is composed of basic hydrous silicates. Unstable minerals are zeolite-based minerals mainly composed of SiO ₂ -Al ₂ O _{3. In} general, even when moisture contained in the crystal lattice of a molecule evaporates, the crystal structure is maintained at high temperature so that the crystal structure is not broken. By forming micropores of ~ 10Å, it acts as a filter, and acts as a molecular sieve to select and adsorb or filter 3 ~ 10 3 of organic or inorganic substances in the wastewater. It can be treated by adsorption, filtration, flocculation and precipitation.

Montmorillonite, another component of the composition of the present invention, is a SiO ₂ -Al ₂ O ₃ component mineral containing about 59% SiO ₂ , about 14% Al ₂ O ₃ , and about 3.5% Na ₂ O. It is widely distributed among other minerals, and complementary when combined with non-fluoride minerals through adsorption and ion exchange by porosity, which is characteristic of SiO ₂ -Al ₂ O ₃ component minerals.

In addition, montmorillonite does not dissolve in water, but absorbs moisture in an aqueous solution and swells to about 8 to 12 times the particle size, thereby complementing the adsorption of contaminants.

Calcined lime [Ca (OH) ₂ ], which is another component of the composition of the present invention, reacts with CO or CO ₂ gas and the like in the solution to form CaCO ₃ , thereby deodorizing and reducing the color.

In addition, slaked lime neutralizes wastewater that adversely affects agricultural land and other industrial facilities.

Another component of the composition of the present invention, alumina sulfate, is a component added to perform a role as a flocculant, and a catalyst is a component added to promote the adsorption, precipitation and flocculation of contaminants. It complements organically to maximize the effect of wastewater treatment.

Ferric sulfate, which is another component of the present invention, has a property that can be used as a pigment and a magnetic material, thereby reducing the chromaticity of the wastewater by removing dyes of the dyeing wastewater through a reduction adsorption process.

The composition of the present invention composed of the above components has the effect of significantly lowering COD, BOD, SS and chromaticity as well as deodorizing function.

Hereinafter, the present invention has been described in more detail with reference to Preparation Examples and Examples, but the scope of the present invention is not limited only to the Examples.

Production Example

(Production Example of Composition of the Invention)

Select bulseok group mineral components contained in the gabbro and basalt and then SiO ₂ 74% by using the specific gravity beneficiation method (specific gravity: 2 to 2.4), using a water spray device ground to a suitable _{size, Al 2 O 3 16%,} Fe ₂ O ₃ 1.4 to disconnect%, CaO 0.12%, MgO 4.4 %, K 2 O extracts a component of about 1.8% and Na ₂ O 1.2% and then dried to prepare a powder pulverized to a size of 100 ~ 200mesh. In the same way, the montmorillonite component is extracted and separated, and then dried in a well-ventilated air-drying method to be pulverized to a size of 100 ~ 200mesh to produce a powder. The fluorine-free mineral powder and montmorillonite powder obtained as described above were mixed with commercially available slaked lime, alumina sulfate, ferric sulfate and MgO in the following ratios to prepare a composition of the present invention.

45% by weight of fluoride minerals

* Montmorillonite 35% by weight

* 5% by weight of slaked lime

* 5% by weight of alumina sulfate

* 2.5% by weight of ferric sulfate

* MgO 7.5% by weight

Example

(Example of wastewater treatment using the composition of the present invention)

About 500 ml of untreated dyed wastewater discharged from Daejeon C spinning company (dyeing and printing factory) is taken as a sample, stirred for about 5 minutes with a magnetic stirrer, and the pH is adjusted to 7 by adding acid and alkali. 1 g of the composition of the present invention prepared in Preparation Example was added thereto and stirred for about 20 minutes. After approximately 20 minutes, the supernatant and precipitate are separated and the supernatant is taken and tested for the following items. The WAK-COD type colorimetric method of the Japan Institute of Physical and Chemical Research was used, and pH was measured using Whole Range Test Paper (pH 0.0-14.0) (manufactured by Dongyang Yeoji Co., Ltd.). The results of conducting the test 30 times for wastewater are shown in the table below.

[table]

As seen from the above results, it can be seen that the composition of the present invention exhibits an excellent treatment effect on the dyeing wastewater.

Claims (2)

A composition for treatment of dye wastewater, characterized by containing the following components: * Natrolite [Na ₂ Al ₂ SiO ₁₀ .2H ₂ O], Laumontite [CaAl | ₂ Si ₄ O ₁₂ .4H ₂ O], stillbite (Ca (Al ₂ Si ₇ O ₁₈ ) .7H ₂ O], chabazite [CaAl | ₂ Si ₄ O ₁₂ .6H ₂ O], Mesolite [Na ₂ Ca ₂ Al ₆ Si ₉ O | One or more minerals selected from fluorite minerals consisting of _{30 8} H ₂ O] and Tomsonite [NaCa ₂ Al ₅ Si ₅ O ₂₀ 6 H ₂ O]: 40-50% by weight * Montmorillonite: 30-40 wt% [Components: SiO ₂ , Al ₂ O ₃ , Na ₂ O, etc.] * Calcium hydroxide: 3 ~ 8 wt% * Aluminum sulphate: 3.5 ~ 8 wt% * Ferric sulfate: 1.5 ~ 3.5 wt% * Catalyst: 3.0 ~ 15.0 wt% The composition for treating dye wastewater according to claim 1, comprising 45% by weight of unfluorinated mineral, 35% by weight of montmorillonite, 5% by weight of hydrated lime, 5% by weight of aluminate, 2.5% by weight of sulfuric acid and 7.5% by weight of catalyst. .