KR20030074062A - Method of a sewage, waste water disposal - Google Patents

Abstract

PURPOSE: Provided is a polyurethane support in which silicate compound is immobilized for adsorbing or coagulating contaminants in wastewater. CONSTITUTION: The floc collector comprises a polyurethane support(1) having a plurality of cells(2), wherein silicate compound being capable of adsorbing and coagulating contaminants in wastewater is immobilized to the cells(2) of the polyurethane support(1), and wherein the polyurethane support(1) is prepared by mixing silicate compound with polyol which is a raw material of polyurethane, mixing the polyol and silicate compound mixture with isocyanates and foaming the mixture compound.

Description

Polyurethane support for chemical treatment of sewage and wastewater containing silicates {METHOD OF A SEWAGE, WASTE WATER DISPOSAL}

The present invention relates to a polyurethane support for chemical treatment of wastewater and wastewater, and more particularly, in adding a silicate compound that adsorbs or aggregates pollutants contained in wastewater, the additives and contaminants may react. The present invention relates to a polyurethane support which can be easily separated from treated sewage and wastewater by imparting a reaction system therein and containing sediment of treated contaminants therein.

Currently, wastewater treatment methods are largely classified into biological methods, physical methods, and chemical methods. Among them, biological methods are widely used due to their high utilization, while their efficiency is low, and the physical methods are very low. It is difficult, and the chemical method is very excellent in utilization and efficiency, but excessive costs due to the installation and operation of a reaction tank for the reaction system for the chemical treatment, a settling tank for removing the precipitate of contaminants removed from the reaction tank, and a precipitation removal device Investment is needed.

In particular, due to the stricter regulations on the discharge of wastewater that is thrown out throughout the industry, the level of the allowable concentration of the pollutant has become very low, which requires secondary advanced treatment of the wastewater treated primarily. Problems arise because there is no efficient wastewater treatment.

The present invention uses a polyurethane as a support to solve the above problems, by fixing a silicate additive for adsorbing or agglomerated contaminants in the polyurethane support to remove the contaminants from the inside of the support, It is an object of the present invention to provide a method for treating wastewater and wastewater, which can be efficiently applied even when the concentration of contaminants is low and the amount of wastewater is not only replaced by the reaction system of the large-scale equipment required by the chemical treatment method. will be.

In order to achieve the above object, the present invention includes a silicate additive for removing contaminants in a polyol (Polyol), which is a raw material of polyurethane, mixing the silicate additive with a polyol, and adding an isocyanate compound after the step. And mixing to form a polyurethane support.

1 is a view showing a polyurethane support for chemical treatment of wastewater, according to the present invention.

FIG. 2 is an enlarged view of a cell structure constituting the polyurethane support shown in FIG. 1. FIG.

FIG. 3 is an enlarged view of a state in which contaminants to be removed are adsorbed to a cell structure constituting the polyurethane support shown in FIG.

Figure 4 is a graph showing the removal efficiency of various contaminants in accordance with the present invention.

<Description of the symbols for the main parts of the drawings>

1: Polyurethane support according to the present invention.

2: Cell structure comprised in a polyurethane support body.

3: The crosslinked body (strut) which comprises a cell structure.

4: silicate additive for chemical treatment of sewage and wastewater adhered to cell structure crosslinked body

5: Empty space of cell structure configured to allow wastewater to pass

6: Contaminants adsorbed by reacting with silicate additives for chemical treatment of sewage and wastewater

Hereinafter, described in detail by the accompanying drawings as follows.

FIG. 1 is a view illustrating a polyurethane support 1 for chemical treatment of wastewater and wastewater according to the present invention. As shown in FIG. 2, contaminants are formed on the crosslinked body 3 forming the cell structure 2. The silicate additive 4 for removal is fixed or adsorbed. Meanwhile, in order that the additive is fixed or adsorbed to the support as described above, the support is formed by mixing the polyol, which is a raw material of the polyurethane support, in advance.

Then, by adding an isocyanate compound to the mixture, a polyurethane support is formed to form an easy cell structure for wastewater treatment.

Meanwhile, as the wastewater passes through the empty space 5 of the cell structure, as shown in FIG. 3, the contaminants 6 contained in the wastewater react with the silicate additives fixed or adsorbed on the support. It can be aggregated or decomposed.

Hereinafter, the present invention will be described in detail based on the preferred embodiment of the present invention. Since the present invention relates to a support which is easy for chemical treatment of wastewater and wastewater, the formation of the polyurethane support is independent of the addition amount of the additive and the addition amount of the raw material. Since the addition amount is not limited to the following examples.

{Example 1}

52.2 g of the silicate compound was added to 110 g of the polyol, mixed, and then mixed with 55 g of the isocyanate compound and foamed to prepare a polyurethane support.

On the other hand, when the contaminants were passed through the support prepared by the above method, the removal efficiency of the contaminants was excellent, in particular, the removal rate of 90% or more for total phosphorus, total nitrogen, heavy metals, SS, and turbidity.

As described above, the present invention uses a polyurethane as a support for the chemical treatment method of wastewater and wastewater, thereby providing a reaction system in which a chemical reaction can easily occur, as well as treating contaminants generated by the reaction. The residues are contained inside to prevent secondary contamination to the treated wastewater, as well as to facilitate their removal.

On the other hand, by the above effect, it is not only possible to replace the reaction tank, the precipitation tank, and the precipitation treatment apparatus required for the conventional chemical treatment method, but also to pass the polyurethane support including the additive even when the concentration of the pollutant is low, the pollutant Since it can be removed, there is an advantage of high efficiency.

Claims (3)

In the polyurethane support for chemical treatment of wastewater, The silicate compound adsorbing or agglomerating contaminants in the wastewater as an additive is mixed with a polyol which is a raw material of polyurethane, and mixed with the isocyanate compound and foamed, and the silicate additive is fixed to the cell structure. , Polyurethane support for wastewater treatment. The polyurethane support for wastewater treatment according to claim 1, comprising at least one kind of the silicate additive. The polyurethane support for wastewater treatment according to claim 1 or 2, wherein the prepared support has a cell size of 1 µm to 4 cm.