KR960002266B1 - Treatment method for waste water of emulsion type - Google Patents

Abstract

The treatment of water-soluble oil waste water, such as paraffin wax emulsion, silicon oil emulsion or edible oil emulsion, comprises (A) adjusting the pH of the oily waste water at 4 by adding HCl or NaOH ; (B) adding inorganic polymer compound of formula PHC(Al2(OH)2-Cl6-n)m in the ratio of 1-5% with respect to waste water, where n=1-5 and m<=10 ; (C) adjusting the pH at 7 by adding NaOH ; (D) maintaining the concentration of waste water at 0.05-0.1% ; and (E) adding a polymer compound to produced nuclei to make the big flocs with high density.

Description

Treatment of Emulsion Wastewater

The present invention relates to a method for treating emulsion zone wastewater, wherein the water-soluble oil wastewater including paraffin wax emulsion zone, silicone oil emulsion zone, other mineral oil and edible oil emulsion zone is reacted and precipitated under normal temperature and pressure to obtain a clear treatment liquid. will be.

The treatment method of water-soluble oil wastewater is acidified, and then inorganic minerals are added to release the oil and treated by flotation.In this case, the remaining wastewater is separated from the sludge after the filtration and separation treatment only after biological treatment. In addition, defects such as deterioration incineration and evaporative enrichment have high installation and processing costs, as well as defects such as pollutants such as dust and unburned gas during incineration, causing air pollution.

Therefore, the present invention is not in order to solve such a conventional defect, the present invention is injected into a drug complexed with an acidic electrolyte solution and a polymer compound to make a nucleus (FLCL) of the FLOC and then add a polymer compound to form a huge FLOS The water-soluble oil precipitated by flocculation is separated by filtration and the filtrate is discharged. If the COD is high, an appropriate amount of hydrogen peroxide is added or simply treated with a COD remover (adsorbent).

At this time, the water-soluble oil sludge is characterized by incineration after drying.

Hereinafter, a preferred embodiment of the present invention will be described in detail.

1) Manufacture of Herbs

(1) For the acidic electrolyte solution, CHCL ₂ , ALCL ₃ , AL ₂ (SO ₄ ) ₃ , FESO ₄ , FECL ₃ , MGCL ₂ , MGSO _4, and the like, including chlorides of the metal compounds of the alkali metals, are used.

(2) Preparation of a high molecular compound (hereinafter referred to as A drug) blended in an acidic electrolyte.

The polymer compound blended with the acidic electrolyte includes polyamide, polyacrylic acid, polymethacrylate, and the like. The acidic electrolyte solution and the polymer compound are post-polymerized at a ratio of 1: 0.0001-1: 0.01.

(3) Preparation of a high molecular compound (hereinafter referred to as B drug) that forms FLOC.

The high molecular compound which forms huge FLOC is an anionic high molecular compound of polyamide type | system | group, The molecular weight uses the thing of 1,000-5,000.

2) Basic Theory

(1) Flocculant neutralizes the charge of the particles and binds them together to form a solid Floc.Flocculant is a molecule with multiple polarizers in polymer material with multiple suckers on a long stem like an octopus. It has a structure.

(2) flocculant Appication

The coagulant must be added in an appropriate amount, and the coagulant itself occupies all the adsorption active sites on the surface of the colloidal particles. Therefore, the coagulant cannot act as a bridge with other particles. By enclosing and stabilizing particles, aggregation is dispersed.

(3) Dissolution process

The water quality of the dilution water spreads the molecular structure long in the form of agglomeration of the practicality to show its molecular weight length.

At this time, the performance of the polymer flocculant depends on how long the molecular structure spreads and exhibits its molecular weight.

(4) Weeting

Water should be evenly wetted on the surface of the powder to prevent clumping of fish eyes.

(5) Stirring

It rotates slowly with a large area of agitator rather than in the form of sharp wings to mix evenly without damaging the molecules.

(6) Aging

Aging is a process that spreads the length of a molecule of molecular coagulant 100%, which is related to time and stirring rate.

(7) Theory

The particle size of the suspension is very small (10 ^-7 ~ 10 ^-5 ㎝) and the specific gravity is greater than 1, but the apparent specific gravity is similar to water, so that the particles that do not settle and do not float on the surface of the water are surrounded by a layer of water molecules. When the (+) or (-) of the same charge when the charge to each other will cause a backlash and can not chip.

The particles are electrodynamically equilibrium by Zeta potential, the electrical repulsion, and Vander Waals' gravity, the electrical attraction.

Thus, colloids are electrically charged and tend to be in equilibrium at all times by the gravitational pull of each other.

At this time, the potential generated at the interface of the water-bonding layer is called Zeta potential. Usually, the Zeta potential is about -20 ~ 50m, and it is suspended by neutralizing the charge by adding (+) charged colloid and ion (A drug) to this dispersion system. When the Zeta potential of the particles reaches ± 10m, the repulsive force between the particles becomes smaller than the attraction force, causing coag ulalation.

At this time, (B drug) is added to the Nuclear produced by coagulation to make a larger floc, thereby increasing the specific gravity of the walking, and thus speeding up the settling speed.

EXAMPLE

1) A certain amount of the sample is adjusted to 4 by HCL or NaOH.

2) PHC (AL ₂ (OH) ₂ -Cl ₆ -n) m, with N = 1-5. Inorganic high molecular compound below M = 10

a) Neutralization of charges occurs between the polymer ions containing aluminum ions and the turbidity in the aqueous solution, and rapidly flocculates the turbidity of aluminum hydroxide produced by their hydrolysis to form large floc and settles extremely rapidly. do.

b) The concentration here depends on the wastewater phase, but is usually less than 1-5% of the wastewater to form a fine floc nucleus.

3) Adjust pH to 7 with NaOH.

4) polymer

The produced Nuclear is large and the specific gravity is large, and the concentration is usually about 0.05-0.1%, but there is a slight difference depending on the amount of suspended particles and the properties of the wastewater.

As described above, the present invention can easily and quickly treat a general water-soluble oil wastewater.

The treatment is simple and inexpensive, and the turbidity and COD removal rate is useful for water soluble waste and general waste water.

There is a slight difference in the use concentration of the drug according to the general wastewater phase, it provides an effect that can be treated without causing air pollution.

Claims (1)

In treating water-soluble oil wastewater such as paraffin wax emulsion, silicone oil emulsion and cooking oil emulsion, the process of adjusting pH to 4 by adding HCl or NaoH to the water-soluble oil wastewater, and PHC (AL ₂ (OH) _2- -Cl _6-n ) m, the process of adding inorganic polymer compound of N = 1-5, M = 10 or less 1-5% of the waste water, the process of adjusting the input pH to 7 with NaoH, and the concentration is 0.05 Emulsion wastewater treatment method characterized in that the floc large and large specific gravity treatment by adding a high-molecular compound to the produced Nuclear about -0.1%.