JP2001058185A - Sewage purification equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an apparatus capable of effectively utilizing metal shavings and achieving purification of contaminated waste liquid at low cost. In a sewage purifying apparatus using both electrolysis and bleaching action with ozone, an electrolysis tank 1 that fills a waste liquid 8 to be treated and a waste liquid that is filled in the electrolysis tank 1 are separated to cut metal. At least one pair of electrodes 9 and 10 which are formed by compressing and shaping the debris into a non-woven shape and which are liquid-permeable; a DC power supply 22 for applying a DC voltage to the electrode 10 serving as an anode and the electrode 9 serving as a cathode; A waste liquid supply means 3 for injecting a waste liquid to the outside surface of the electrode, and a waste liquid outlet 7 for discharging the waste liquid flowing toward the outside surface of the other electrode.
And an ozone supply means 11 provided downstream of the waste liquid supply means for supplying ozone to the waste liquid to be treated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for purifying polluted water, and more particularly to an apparatus for purifying water polluted by waste dye.

[0002]

2. Description of the Related Art It is extremely difficult to decolorize a dye waste solution discharged from a dye factory or a dye manufacturer. The degree appears very significant. Although there is no legal regulation because the amount of dye contained in the waste liquid is small, there are many complaints and requests for improvement from local residents, which has troubled dyeing factories and dye manufacturers.

On the other hand, a machining factory that has developed in the center of a large city has been relocated to a region where a dyeing factory was conventionally located due to improvements in traffic environment, location conditions, and the like. Many cutting machine tools are installed in a machining factory, and a large amount of metal chips such as aluminum and iron are discharged from these cutting machine tools. If it is a rare metal such as titanium, even if it is cutting waste, it can be immediately and expensively purchased by a collection company,
Aluminum and iron scraps are extremely inexpensive and are not always available for immediate purchase. In addition, since cutting chips are generally discharged in a spiral shape, the apparent volume of the chips is large, and a large storage space is required.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned inconveniences, and has as its object to make effective use of metal cutting chips and to purify contaminated waste liquid at low cost. To provide a simple device.

[0005]

In order to achieve the object of the present invention as described above, the invention according to the first aspect of the present invention provides a wastewater purifying apparatus using both electrolysis and bleaching by ozone in a wastewater purifying apparatus. And at least one set of electrodes which are formed by compressing metal shavings into a non-woven shape and forming a liquid-permeable material, A DC power supply for applying a DC voltage to the electrode serving as a cathode and the electrode serving as a cathode; a waste liquid supply means for injecting a waste liquid to be treated into the outer surface of one electrode; and an outflow toward the outer surface of the other electrode Waste liquid discharge means for discharging the waste liquid to be treated, ozone supply means provided downstream of the waste liquid supply means to supply ozone to the waste liquid to be treated,
Is provided. In the invention according to claim 2 of the present application, in addition to the invention according to claim 1, there is provided a sewage purification apparatus characterized by having a sedimentation tank provided downstream of the waste liquid discharging means. In the invention according to claim 3 of the present application, in addition to the invention according to claim 1, there is provided a sewage purification apparatus, wherein the metal cuttings are aluminum cuttings. In the invention according to claim 4 of the present application, in addition to the invention according to claim 1, there is provided a sewage purification apparatus, wherein the metal cuttings are iron cuttings. In the invention according to claim 5 of the present application, in addition to the invention according to claim 1, the electrode includes a metal support frame having a plurality of liquid-passing ports, and metal cutting chips are compressed in a non-woven form. The electrode body that is liquid-permeable and molded into a shape
There is provided a sewage purification apparatus characterized by being electrically attached. In the invention according to claim 6 of the present application, in addition to the invention according to claim 1, sewage purification characterized by providing acid injection means for holding the waste liquid to be treated filled in the electrolysis tank at PH3 to PH4. An apparatus is provided. In the invention according to claim 7 of the present application, in addition to the invention according to claim 1, the ozone supply means is provided further downstream of a settling tank provided downstream of the electrolysis tank. Provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a conceptual block diagram of a sewage purification apparatus according to the present invention. The sewage purification apparatus of the present invention has an electrolysis tank 1 formed of concrete, synthetic resin, or the like. A settling tank 2 is provided adjacent to the electrolysis tank 1. A waste liquid reservoir 3 for supplying the dye waste liquid to be treated to the electrolysis tank 1 is disposed above the electrolysis tank 1, and a constant amount of the dye waste liquid to be treated is always supplied from the waste liquid reservoir 3 to the electrolysis tank 1. . The waste liquid overflowing the electrolysis tank 1 is sent to the settling tank 2 via the connecting pipe 4.

The waste liquid to be treated supplied from the connecting pipe 4 is sent from the connecting pipe 7 to the ozone reaction tank 5 while sedimenting the separated precipitate 6. The sediment accumulated on the bottom of the sedimentation tank 2 is discharged to the outside from the sediment discharge port 23.
The scum floating on the upper portion may be collected in the sedimentation tank 2 or may be collected after being discharged from the sedimentation tank 2. Reference numeral 8 denotes a dye waste liquid to be treated filled in the electrolysis tank 1. The dye waste liquid 8 to be treated slowly flows from the supply side (upstream side) toward the connecting pipe 4 (downstream side) while passing through the permeable electrodes 9 and 10. These electrodes 9 and 10 completely separate the upstream side and the downstream side in the electrolysis tank 1. Therefore, the dye waste liquid 8 to be processed always passes from the upstream side to the downstream side of the electrode. An ozone generator 11 is provided in the ozone reaction tank 5 and discharges the ozone generated by the ozone generator 11 into the waste liquid to be treated.

As shown in FIG. 2, each of the electrode plates 9 and 10 has two electrode bodies 13 and 14 formed by compressing aluminum shavings into a plate shape, and a support frame 15 for supporting them. The electrode bodies 13 and 14 are formed by compressing aluminum cuttings and molding the aluminum cuttings into a non-woven shape to a thickness of about 2 cm, and are extremely air-permeable and liquid-permeable.

The support frame 15 is made of an aluminum plate. A terminal portion 16 is formed at the upper end. The flat plate portion 17 has a liquid passage port 18 and holding protrusions cut and raised from both sides of the flat plate portion. 19 are formed. The two electrode bodies 13 and 14 which are compressed and formed into a non-woven shape are applied to both surfaces of the support frame 15 and are compressed from both surfaces. As a result, the holding projections 19 of the support frame 15 pierce the electrode bodies 13 and 14, and their tips are slightly bent as shown in FIG.
And are electrically connected to each other. When the electrode bodies 13 and 14 are compression-molded into a flat plate shape, holes for inserting the holding projections 19 are previously formed in the electrode body 1.
Alternatively, the holding projections 19 may be easily inserted through the holding projections 3 and 14.

A plurality of the electrode plates configured as described above are arranged in the electrolysis tank 1 at regular intervals, and the terminal portions 16 of these electrode plates are connected in parallel by alternate conductors 20 and 21 every other. Electrode 9 is connected in parallel by conductor 20 and connected to the minus terminal of DC power supply 22, and electrode 10 is connected in parallel by conductor 21 and connected to the plus terminal.

Next, the operation of the thus configured sewage purifying apparatus according to the present invention will be described. The dye waste liquid to be treated, which is discharged from a wastewater discharge source such as a factory, is supplied from the waste liquid reservoir 3 to the electrolysis tank 1 by a fixed amount. Therefore, the dye waste liquid to be treated slowly flows from the left side to the right side of the electrolysis tank 1 in FIG. At this time, compressed air is sent from the air supply device 24 to the waterfall tube 25. Since the waterfall tube 25 is provided with countless small holes, air is released as small bubbles into the dye waste liquid to be treated, and a so-called waterfall is performed.
Oxygen in the air is supplied into the dye waste liquid to be treated by this waterfall action, and this oxygen dissolves in the dye waste liquid to be treated and assists the oxidation thereof.

The dye liquor to be treated moves downstream while passing through the electrodes 9 and 10, but undergoes electrolysis while located between the electrodes 9 and 10. The aluminum constituting the electrode elutes Al3 + ions into the dye waste liquid to be treated by this electrolysis, and reacts with OH- ions generated by the electrolysis of water to produce aluminum hydroxide in the dye waste liquid to be treated, which is negatively charged. Then, the pollutants in the dye liquor to be treated are taken in to form small particles. Some of these small particles float by the hydrogen gas generated from the cathode electrode adhering thereto, and float in the form of bubbles to float on the surface of the dye waste liquid to be treated, but some of them float in the dye waste liquid to be treated. In addition, acid is injected into the electrolysis tank 1 from the pH adjusting device 26, and the pH value of the dye waste liquid 8 to be treated filled in the tank is maintained at 3 to 4 to maintain a stable electrolysis operation. . As an advantage of maintaining the pH of the electrolysis tank 1 at pH 3 to 4, the degree of polluting substances to be decomposed is increased, and sedimentation in the settling tank 2 is facilitated.

The treated dye waste liquid 8 treated in the electrolysis tank 1 is sent to the precipitation tank 2 through the connecting pipe 4. The sedimentation tank 2
The dye waste liquid 8 to be treated is supplied with an acid in the electrolysis tank 1 and exhibits strong acidity. In the precipitation tank 2, P
An H adjusting device 27 is provided, and a predetermined amount of an alkaline solution is injected into the dye waste liquid 8 to be fed therein, and the pH value thereof is adjusted to 7. The contaminants floating in the dye waste liquid 8 to be treated are collected as a precipitate in the sedimentation tank 2 and discharged from the sediment discharge port 23 to the outside of the sedimentation tank.

The dye waste liquid 8 from which the precipitate has been removed in the sedimentation tank 2 is sent to the ozone reaction tank 5 through the connecting pipe 7. In the ozone reaction tank 5, a bubble-like ozone gas is sent from the ozone generator 11 into the dye waste liquid 8 to be treated, and the liquid 8 is decolorized. By such an action, the dye waste liquid to be treated in the ozone reaction tank 5 is completely decolorized, and becomes colorless, transparent and clear. At the same time, the dye waste liquid to be treated is completely deodorized by the supply of ozone. Then, the liquid overflowing from the ozone reaction tank 5 is drained from a drain port 28.

In the above embodiment, aluminum cuttings are used as the metal constituting the electrode. However, iron cuttings can be used instead of aluminum.

Although the present invention has been described with reference to the above embodiment, various modifications and applications are possible within the scope of the present invention, and these modifications and applications are excluded from the scope of the present invention. is not.

[0017]

As described in detail above, the present invention provides
The waste liquid to be treated filled in the septic tank is separated by at least one set of electrodes, and these electrodes are formed by compressing metal shavings into a non-woven shape to form a liquid-permeable material. If the liquid to be treated is injected, the liquid to be treated passes through one set of electrodes naturally by gravity without using any agitating device or transfer device, and is disposed in the outer surface direction of the other electrode. It flows out to a waste liquid outlet that discharges waste liquid. Moreover, when passing through the at least one set of electrodes, the waste liquid to be treated undergoes electrolysis and is decolorized. Further, since ozone supply means for supplying ozone to the waste liquid to be treated is provided in the vicinity of the waste liquid supply means, ozone is efficiently bleached while moving with the waste liquid to be treated. Further, since aluminum or iron cuttings are used as the metal forming the electrode, there is an advantage that the electrode can be manufactured at extremely low cost.

[Brief description of the drawings]

FIG. 1 is a conceptual block diagram of a sewage purification device according to the present invention.

FIG. 2 is an exploded perspective view of an electrode.

FIG. 3 is a cross-sectional view of an electrode.

[Description of Signs] 1 ... Electrolysis tank 2 ... Settling tank 3 ... Waste liquid reservoir 4 ......... Connecting pipe 5 ...... Ozone reaction tank 6 ... ··· Precipitate discharge port 7 ···· Drain port 8 ···· Drainage liquid to be treated 9 ····· Electrode 10 ····· Electrode 11 ·················· ················································································································ ·····················································································································································································・ ・ Float pipe 26 ・ ・ ・ ・ ・ ・ ・ PH adjuster 27 ・ ・ ・ ・ ・ ・ ・ PH adjuster 28 ・ ・ ・ ・ ・ ・ ・ Drain outlet

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 3, 1999 (1999.9.3)

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

Next, the operation of the thus configured sewage purifying apparatus according to the present invention will be described. The dye waste liquid to be treated, which is discharged from a wastewater discharge source such as a factory, is supplied from the waste liquid reservoir 3 to the electrolysis tank 1 by a fixed amount. Therefore, the dye waste liquid to be treated slowly flows from the left side to the right side of the electrolysis tank 1 in FIG. At this time, compressed air is sent from the air supply device 24 to the aeration tube 25. Since the aeration tube 25 is provided with countless small holes, air is released as small bubbles into the dye waste liquid to be treated, and so-called aeration is performed.
Oxygen in the air is supplied to the dye waste liquid to be treated by this aeration action, and this oxygen dissolves in the dye waste liquid to be treated and assists the oxidation thereof.

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Continuation of front page (71) Applicant 598000622 Nasu Corporation Co., Ltd. 2-106-148 Nangoya, Nishinasuno-cho, Nasu-gun, Tochigi Prefecture (71) Applicant 592080408 Sankyo System Co., Ltd. 5-28, Fujimi-cho, Tochigi-shi, Tochigi (72) Inventor Miki Miyagi 16-1, Kinugaoka, Moka-shi, Tochigi Pref., Nikoa Rumi Kogyo Co., Ltd. (72) Inventor Shoji Iso 401, Shinmachi, Minagawa-Jonai-cho, Tochigi-shi, Tochigi Pref. Person Masaki Masuda 780 Shinjuku-cho, Ashikaga-city, Tochigi Prefecture Beni Sannai Co., Ltd. (72) Inventor Chuichi Shinoki 2-5-2-20 Sonobe-cho, Tochigi-shi, Tochigi Nishiki Engineering Co., Ltd. 2-106-148 Machi Nangoya F-term in Nas Corporation (reference) 4D050 AA13 AB03 BB01 BB02 BD06 CA10 CA13 CA16 4D061 DA09 DB11 DB15 DC03 DC06 EA06 EB01 EB04 EB11 EB18 EB27 EB28 EB33 EB39 ED06 FA11 FA14 FA14

Claims (7)

[Claims] In a sewage purification apparatus using both electrolysis and bleaching action with ozone, an electrolysis tank filled with a waste liquid to be treated and a waste liquid filled in the electrolysis tank are separated.
At least one set of electrodes that are formed by compressing metal shavings into a non-woven shape and that are liquid-permeable, a DC power supply that applies a DC voltage to these anode and cathode electrodes, and one of the electrodes A waste liquid supply means for injecting a waste liquid to the outer surface, a waste liquid discharge means for discharging a waste liquid flowing out toward the outer surface of the other electrode, and a waste liquid supply means provided downstream of the waste liquid supply means And an ozone supply unit for supplying ozone to the waste liquid to be treated. 2. The sewage purification apparatus according to claim 1, further comprising a sedimentation tank provided downstream of said waste liquid discharging means. 3. The sewage purification apparatus according to claim 1, wherein said metal cuttings are aluminum cuttings. 4. The sewage purification apparatus according to claim 1, wherein the metal cuttings are iron cuttings. 5. An electrode body comprising: a metal support frame having a plurality of liquid passages; metal cutting chips compressed in a non-woven form; The sewage purification apparatus according to claim 1, wherein the sewage purification apparatus is electrically attached. 6. The waste liquid to be treated filled in the electrolysis tank is P
The sewage purification apparatus according to claim 1, further comprising an acid injection unit that holds H3 to H4. 7. The sewage purification apparatus according to claim 1, wherein the ozone supply means is provided further downstream of a settling tank provided downstream of the electrolysis tank.