JPS6274485A - Decoloring apparatus - Google Patents

Abstract

PURPOSE:To efficiently and inexpensively decolor waste water by a simple apparatus, by guiding H2O2 and a FeSO4 solution to an ultrasonic treatment tank while contacting and mixing both of them to apply ultrasonic treatment to the resulting mixture and further guiding said mixture to a mixing tank by a recirculation apparatus to subject the same to recirculation treatment. CONSTITUTION:Inflow water 1 such as excretion is introduced into a reaction tank 3 from an inflow tank A to be stored therein up to a definite level and subsequently sucked up from a mixing tank B by a water sucking pipe 17a to be made to flow to an emitting pipe 17b, a contact apparatus 6 and an ultrasonic treatment tank C and recirculated to the mixing tank B through the gap 25 provided to the lower part of a barrier wall 4. At this time, the recirculation pump 5 in the contact tank 6 is operated to suck a FeSO4 solution and a H2O2 solution from storage tanks 7, 8 to forcibly and violently contact and mix the same with inflow water. Further, the water is treated with the ultrasonic wave generated from an ultrasonic wave generator 10 in the ultrasonic treatment tank C to be efficiently decolored and the treated water is returned to the mixing tank C to be again subjected to recirculation treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Industrial Application The present invention relates to a decolorizing device in a facility for treating wastewater such as human waste.

B6 Invention (Existing) The present invention divides the inside of the reaction tank into a mixing phase 1'1 and an ultrasonic treatment tank by a shielding wall, and inflow wastewater circulates through the mixing phase and the ultrasonic treatment tank via a circulation device. A case-shaped contact device with an opening at the bottom is provided in the upper part of the ultrasonic treatment tank, and the contact device is connected to a circulation pipe provided in the circulation device and H
z 02 solution and Fe50. By introducing each solution injection pipe and installing an ultrasonic treatment device in the ultrasonic treatment tank, H202F″eso, the ultrasonic treatment of addition, and the above
The agitation of the h Ch , F e SO4 solution and the stock solution to be treated is combined, and therefore wastewater can be decolorized very efficiently using a simple device.

C9 conventional technology and problems When human waste is processed biologically, organic components (BOD, COD) are removed.

ToC, etc.) can be removed at a high rate, but color can hardly be removed. Rather, it tends to become darker due to biooxidation. Although they do meet environmental standards, they often become a visual pollution problem. It is generally said that this is due to stercopyrin, which is contained in bile and is produced from bile pigments such as the green pigment bilivenzin and the orange pigment bilirubin. In other words, in recent years, there has been a growing need for tertiary treatment equipment or advanced treatment equipment to remove this pigment as ancillary equipment for biological treatment (secondary treatment).

Conventionally, unit processes such as c'Ijl precipitation method, ■ ozone treatment method, and ■ adsorption treatment method or combination processes have been considered as methods for removing chromaticity, but there is still no rational decolorization method. The reality is that it doesn't exist.

The purpose of the present invention is to compare and study the removal methods (1), (2), and (2) above based on the results of basic experiments, and to provide an apparatus that can be expected to have a good decolorizing effect.

Measures to solve D9 problem ■, (2) based on basic experiments conducted by the present inventor.

Table 1 shows a comparison of the chromaticity removal performance of each processing method.

Margins below In all of the above basic experiments, the same stock solution was used for each RUN, and the chromaticity was 945. In Table 1, RUN4 and RUN6
It is clear that ultrasonic treatment is more effective in removing chromaticity than stirring. The standard price (Is
28% of Oz: 450 yen 1500 P, F! SO4
.

7H* O: 45010rL1500! i', Powdered activated carbon: 14501:q/kp, ) The amount (yen) that can remove 250 ffl per unit removal chromaticity using CD chemicals is RUN5: 0°14. RUN6':01
21°RUN7: It was 0°54. As a result of taking the above conditions into consideration, the present invention proposes an apparatus that can implement the RUN6 processing method more efficiently.

That is, in the present invention, the interior of the reaction tank into which wastewater flows is divided into a mixing tank and an ultrasonic treatment tank by a blocking wall, and the inflow water is provided to circulate through the mixing tank and the ultrasonic treatment water through a circulation device. A case-like contact device with an opening at the bottom is provided at the top of the ultrasonic treatment tank, and the circulation vibrator of the forward circulation device and the injection pipes for the H2O2 solution and Fe5O4fB solution are introduced into the contact device, and the ultrasonic treatment is carried out. This is a decolorizing device characterized by having an ultrasonic treatment device installed in the tank.

E. Function The wastewater flowing into the reaction tank first enters the mixing tank, and on the way to the ultrasonic treatment tank by the circulation device, the circulating water and )h 02 , Fe SO 4 solution are mixed inside the contact device, and the ultrasonic The water is forcibly stirred by ultrasonic waves in the sonication tank, and the circulating water enters the mixing tank from the sonication tank, and decolorization is performed during this circulation process.

F. Embodiments The present invention will be explained below based on embodiments shown in FIG. 1 and 2 UXJ. FIG. 1 is a schematic diagram of a decolorizing apparatus, and 3 is a reaction tank. Inside the reaction tank 3, three tanks A, B, and C are formed by two large and small shielding walls φ and tS. The container is an inlet tank (this part can be omitted if necessary), (B is a mixing tank, and C is an ultrasonic treatment tank). This reaction tank 3 is configured to enter inflow water up to a certain level, process it batchwise, and discharge it as treated water.-1 That is, S is a circulation pump, 17! -! A water suction pipe 7a of the circulation pipe hangs down to the bottom of the mixing tank 13.A discharge vibrator 1'tb led out from the circulation pump 5 is led to a contact device Bb provided at the top of the ultrasonic treatment tank C.

An ozone generator lφ is connected to the contact device B via an injection pipe /l, and a connecting vibrator 19. hb O! respectively through Ko O! Solution storage tank 7 and FeSO
4 is connected to the storage tank. 9 is a valve. Furthermore, an ultrasonic generator 10 is disposed at the bottom of the ultrasonic treatment tank C. /1 is a valve for opening and closing the ultrasonic treatment 11 (located at the bottom of the I tank C), and a valve for opening and closing the sludge drain port 16 provided at the bottom of the reaction tank 3.

Next, the detailed structure of the contact device B is shown in FIG. This is an application of the principle of this contact device M6 water flow pump (aspirator). That is, Aa is the circulation pipe 17 mentioned above whose upper side is swollen like a shoulder, the ozone injection vibrator/r, and the H20x injection pipe/q, Fe.
Each tip of the SO4 injection pipe 20 is introduced in substantially the same direction. A funnel-shaped stirring blade is installed inside the cylindrical lower part of the contactor main body 6a.3. 3 is provided in two stages, upper and lower.

Next, the operation will be explained. First, in FIG. 1, the inflow water l from the inflow tank A is kept at a constant level within the leakage reaction WJJ up to a constant level ψ. Next, mixing tank B
Sewage is sucked up from inside by the suction pipe/7a, and discharged by the circulation pump j into the contact device 6 through the discharge pipe/7b, thereby transferring the mixed liquid from the mixing tank B and the ultrasonic treatment tank C to the lower part of the shielding wall φ. While circulating through the pump 2j, at the same time, the mixed liquid is forcibly and violently brought into contact with the F e S 04 , Hz Ot bath solution from the stored liquid 7゜l by the contacting device 6, and further, the ultrasonic generator i1 The processing efficiency is further increased by the ultrasonic waves generated. Said O1
The operation of the i.p. pump 5 and the ultrasonic generator 10 may be appropriately set based on the inflow chromaticity and processing performance.

After carrying out the above treatment for a certain period of time and causing a contact reaction, the apparatus is stopped and the mixed liquid is allowed to stand.
(floating residue) is formed. After this has been completely settled, the supernatant water is discharged from the treated water outlet by opening the valve.
The sludge is opened and drained from the mud drain ports 16 respectively.

Next, the operation of the contact device 6 will be explained with reference to FIG.
When it is discharged from 7a and flows inside the main body 6a, it flows inside the main body 26.
is in a reduced pressure state. Therefore, H2O2 or [F″e
sO4esO4 solution type tq, each reservoir through twenty?
, ff are sucked into the inner roller of the main body. Each solution injected into the rollers in the main body and the circulating water/a are forcibly brought into contact inside the main body 26, but with stirring 3. ko3
It collides with the water and mixes even more violently. In this process, the chromaticity of the circulating water is considerably removed, but the above-mentioned ultrasonic treatment tank C
Since the circulating water discharged from the contact device 6 is subjected to ultrasonic treatment, the decolorizing effect is further enhanced.

Then, the contact water in the ultrasonic tank C returns to the mixing tank B through the gap 5 between the lower end of the shield and the bottom of the reaction tank 3, and is circulated again. In addition, H20x, Fe50
*Since each solution is vacuum-suctioned into the contactor body = 6, it is stored in the storage tank 7. It is not necessary that the contact point be on the top of the contact device M6.

The degree of injection can also be controlled by the valve 9.

Note that since ozone is effective for decolorization, by introducing ozone generated from the ozone generator lφ into the contacting device 6 through the injection pipe tr, the decolorization effect can be further enhanced and the processing time can be shortened. be.

G0 Effects of the Invention According to the present invention, since it is an apparatus that mixes H2O2 and FeSO4 solutions in contact, treats the solution with ultrasonic waves, and further circulates the solution using a circulation device, it is possible to achieve a simple apparatus by combining the above-mentioned processing means. , you can obtain an efficient and inexpensive wastewater decolorization device! ! Mu

[Brief explanation of drawings]

FIG. 1 is a sectional explanatory view of a decolorizing device according to the present invention, and FIG. 2 is a ribbed view of a contact device. A... Inflow tank, B... Mixing tank, C... Ultrasonic treatment tank, l... Inflow water, U... Treated water, 3... Reaction tank, φ... Shielding wall , 5... Circulation pump, 6... Contact device, 7... H2O2 solution storage tank,... Fe S
04 Solution storage tank, IO... Ultrasonic generator.

Claims (1)

[Claims] The interior of the reaction tank is divided into a mixing tank and an ultrasonic treatment tank by a shielding wall, and a circulation device is provided so that the inflow wastewater is circulated between the mixing tank and the ultrasonic treatment tank, and the upper part of the ultrasonic treatment tank is A case-like contact device with an opening at the bottom is provided, and the circulation pipe provided in the forward circulation device and the injection pipes for the H_2O_2 solution and FeSO_4 solution are introduced into the contact device, and the ultrasonic treatment is carried out in the ultrasonic treatment tank. A decolorizing device characterized by being provided with a device.