WO2004065310A1 - 電気分解式汚水処理装置 - Google Patents
電気分解式汚水処理装置 Download PDFInfo
- Publication number
- WO2004065310A1 WO2004065310A1 PCT/JP2003/000573 JP0300573W WO2004065310A1 WO 2004065310 A1 WO2004065310 A1 WO 2004065310A1 JP 0300573 W JP0300573 W JP 0300573W WO 2004065310 A1 WO2004065310 A1 WO 2004065310A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sewage
- electrodes
- voltage
- pollutants
- wastewater
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
- C02F2103/325—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from processes relating to the production of wine products
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4616—Power supply
Definitions
- the present invention relates to an electrolysis type sewage treatment apparatus for separating pollutants from sewage by applying a voltage between electrodes.
- Japanese Patent Application Laid-Open No. 11-222658 describes a method of purifying wastewater such as suspended emulsion water and industrial wastewater by electric treatment.
- this electric treatment method for example, as shown in FIG. 14, electrodes 52.5 3 are installed facing each other in an electrode tank 51 of a sewage treatment apparatus 50, and the space between the electrodes 52, 53 is formed.
- a voltage is applied to the passing sewage 54 to remove the electrostatic attraction between the water molecules and the pollutants 55 including oil, organic matter, metal compounds, etc. in the sewage 54, and the sewage 54 It separates pollutants 5 5.
- the particles of the pollutant 55 are positively or negatively charged due to factors such as ionization and hydration, and are particles of the same charge. They do not repel each other to form large particles, making it difficult to separate pollutants from wastewater.
- the charged pollutant 55 particles receive an electric field and have different charges. Move to electrode 52 or electrode 53.
- the particles of the pollutant 55 transferred to the electrode 52 or the electrode 53 lose charge and become neutral particles and aggregate with each other.
- the agglomerated particles float on the surface of the electrode tank 51 as scum (floating residue) or settle at the bottom as sludge to separate the pollutant 55 from the wastewater 54.
- the treatment capacity of the sewage treatment apparatus 50 greatly varies depending on quantitative factors such as the type, concentration, and temperature of the sewage 54 to be treated, and the magnitude of applied current and voltage. For this reason, in the sewage treatment apparatus 50, the treatment capacity of the sewage 54 became unstable, and the pollutants 55 could not be sufficiently separated from the sewage 54, and there was a possibility that efficient sewage treatment could not be realized. Further, when the wastewater 54 has a high concentration of pollutants 55 in a paper mill or the like and contains sugar and alcohol in a sugar mill or the like, it has become more difficult to stably treat the wastewater 54.
- Patent Document 2 derives the optimum values of the applied voltage, current density and resistance value by carefully considering the separation trend of sewage, but the results of the inventor's new sewage treatment experiment In addition, we found excellent optimal conditions for voltage, current density and resistance under the optimal conditions for sewage treatment.
- the present invention has been made in view of the above circumstances, and its purpose is to examine applied voltage, current density, and resistance values to be applied between the electrodes, and to specifically apply these applied voltage, current density, and resistance values.
- Electrolytic sewage treatment equipment that can realize stable sewage treatment by setting to To provide a location. Disclosure of the invention
- the electrical conductivity of sewage fluctuates mainly due to the presence of electrolytes dissolved in the sewage. If there is little electrolyte in the sewage and the resistance between the electrodes is large, the current flowing between the electrodes decreases, and pollutants The neutralization rate of the particles decreases. In this case, the amount of sludge generated by flocculation of pollutants decreases, and the pollutant removal rate decreases.
- the resistance value between the electrodes is controlled to reduce the neutralization rate of the particle charges of the pollutants, and that they are once aggregated by neutralization. It has been found that it is sufficient to find a resistance value range in which the polluted substance does not recharge due to the extra charge.
- the resistance between the electrodes is set within a range in which the neutralization rate of the particle charges of the pollutant is not reduced and the pollutant once aggregated by the neutralization is not charged again by the extra charge. Adjust the value for stable sewage treatment. Specifically, the applied voltage between the electrodes a current density between 4 0 V ⁇ 6 0 V and electrode 0. 0 0 0 1 mA / mm 2 ⁇ 0. 0 0 0 5 m A / mm 2 met Te, the resistance value between the electrodes is set to be 8 0 ⁇ / mm 2 ⁇ 6 0 0 M ⁇ / mm 2. As a result, pollutants can be efficiently removed from sewage, which is difficult to treat in the past. Wastewater containing high concentrations of pollutants and wastewater containing sugar and alcohol can be treated efficiently and stably.
- sewage is caused to flow at a predetermined flow rate so as to pass between the electrodes, and the time required for the sewage to pass through a voltage application region where a voltage is applied between the electrodes is 60 seconds to 150 seconds. It is set to be seconds. If a voltage is applied while the sewage is stagnant between the electrodes, the temperature of the sewage rises, and the resistance between the electrodes fluctuates, making it difficult to continue stable sewage treatment. In this case, by flowing the sewage between the electrodes at a predetermined flow rate, the temperature rise of the sewage can be suppressed, and the resistance value between the electrodes can be prevented from fluctuating.
- the voltage application time to the sewage is too short, the neutralization rate of the particle charges of the pollutant decreases, and the Material removal rate is reduced. Conversely, if the voltage application time is too long, the contaminated substances once aggregated by neutralization will be recharged by the extra charge and will be redispersed in the wastewater. Considering these phenomena, the voltage application time to
- Fig. 1 is a vertical sectional view of an electrolytic sewage treatment apparatus (first embodiment).
- Figure 2 is a top view of the electrolyzed wastewater treatment system.
- Figure 3 is a graph showing the relationship between the applied voltage and the removal rate of pollutants in wastewater.
- Figure 4 shows the current density applied between the electrodes and the removal rate of pollutants in wastewater.
- 6 is a graph showing the relationship of.
- FIG. 5 is a graph showing the relationship between the voltage application time and the pollutant removal rate in wastewater.
- FIG. 6 is a top view of the electrolytic sewage treatment apparatus (second embodiment).
- FIG. 7 is a longitudinal sectional view taken along the line BB of FIG.
- FIG. 8 is a schematic diagram of a conventional electrolytic sewage treatment apparatus. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 Embodiments of an electrolytic sewage treatment apparatus embodying the present invention will be described with reference to FIGS. 1 to 7.
- FIG. 1 Embodiments of an electrolytic sewage treatment apparatus embodying the present invention will be described with reference to FIGS. 1 to 7.
- FIG. 1 Embodiments of an electrolytic sewage treatment apparatus embodying the present invention will be described with reference to FIGS. 1 to 7.
- FIG. 1 Embodiments of an electrolytic sewage treatment apparatus embodying the present invention will be described with reference to FIGS. 1 to 7.
- the electrolysis type sewage treatment apparatus 1 in the first embodiment contains sewage 2 flowing as shown by arrows in FIGS. 1 and 2, and treats the sewage 2 by applying a certain voltage to the electrodes 3a, 3a. 3 b.
- the septic tank 4 of the electrolytic sewage treatment apparatus 1 is formed in a vertically long box shape from, for example, plastic material, and two partition plates 5 (5a, 5b) are provided at predetermined intervals. It is juxtaposed.
- the inside of the purification tank 4 is divided into three chambers of a storage tank 6, an electrolysis tank 7 and a separation tank 8 by juxtaposing the partition plates 5.
- the lower end of the partition plate 5a between the storage tank 6 and the electrolysis tank 7 has a short length so that sewage can flow from the storage tank 6 to the electrolysis tank 7.
- the upper end of the partition plate 5b between the electrolysis tank 7 and the separation tank 8 is short, and the sewage 1 can flow from the electrolysis tank 7 to the separation tank 8.
- the upper end of the storage tank 6 is connected to a water pipe 9 for guiding the wastewater 1 to the storage tank 6, and the lower end of the separation tank 8 is connected to a drainage pipe 10 for discharging the treated wastewater 2 to the outside.
- a pump (not shown) is connected to the water pipe 9 so that the flow rate of the sewage 2 passing through the septic tank 4 can be adjusted.
- a discharge pipe 12 for discharging settled or settled sludge 17 is connected to the bottom of the electrolysis tank 7 and the separation tank 8.
- a mounting plate 13 for the electrodes 3a and 3 is arranged so as to be parallel to the partition plates 5a and 5b.
- a plurality of mounting plates 13 can be arranged, and can be moved in the direction of separation / contact with the partition plates 5a and 5b.
- the number of electrodes 3a and 3b and the distance between the electrodes 3a and 3b The distance can be adjusted.
- the electrodes 3a and 3b are made of aluminum plate, and are mounted on both sides of the mounting plate 13 and on opposing sides of the partition plates 5a and 5b.
- a pair of opposed electrodes 3a and 3b are connected to a positive terminal and a negative terminal (neither is shown) of a DC power supply to form an anode and a cathode.
- the sewage 2 flows into the septic tank 4 of the electrolytic sewage treatment apparatus 1 from the water pipe 9.
- the sewage 2 flows into the electrolysis tank 7 from the storage tank 6 through a gap G1 formed at the lower end of the partition plate 5a.
- the sewage 2 flowing into the electrolysis tank 7 flows from the lower part to the upper part between the electrodes 3a and 3b, and flows into the separation tank 8 through the gap G2 formed at the upper end of the partition plate 5b.
- the sewage 2 flowing into the separation tank 8 flows from the upper part to the lower part of the separation tank 8 and is discharged to the outside from the drain pipe 10.
- a DC voltage of 40 V to 60 V is applied to the electrodes 3 a and 3 b, and the distance between the electrodes 3 a and 3 b is adjusted by moving the mounting plate 13.
- the current density flowing between the electrodes 3a and 3b is set to be 0.001 mA / mm 2 to 0 ⁇ 0.05 mA / mm 2 .
- the inflow of sewage 2 is adjusted by the pump of the water pipe 9, and the voltage application area 14 from the sewage inflow end D 1 to the sewage outflow end D of the electrodes 3 a and 3 b is adjusted to the sewage 2.
- the time required for the voltage to pass (voltage application time) is set to be 60 seconds to 150 seconds.
- the charged particles of the pollutants 15 in the sewage 2 move to the electrodes 3a and 3b under the influence of the electric field.
- the charged particles that have moved to the electrodes 3a and 3b lose their charge, become electrically neutral particles, and aggregate with each other.
- the pollutants 15 in the sewage are separated from the sewage Z, and the separated pollutants 15 become floating sludge 16 and float on the surface of the separation tank 8 as scum or settle sludge 17 And settle to the bottom.
- the suspended sludge 16 is recovered by scooping with a skimmer, and the settled sludge 17 is recovered via a discharge pipe 11.
- the clarified water obtained by treating the sewage 2 by changing the voltage and the current density by the electrolytic sewage treatment apparatus 1 is collected from the separation tank 8, and the clarified water is used for biological oxygenation.
- B 0 D chemical oxygen demand
- COD chemical 0 ygen D emand, hereinafter referred to as COD
- SS suspended solids
- Tota 1 total nitrogen
- T-N Nitrogen
- T-I Totalphosphorus
- Figure 3 shows the relationship between the applied voltage and the removal rate of pollutants 15 in sewage 2.
- the calculation formula of (removal rate) (measured value of treated water) / (measured value of wastewater before treatment) is used.
- the sewage 2 in the septic tank 4 As a result of visually observing the sewage 2 in the septic tank 4, at a low voltage, the sewage was not able to properly separate the pollutants 15 and was in a turbid state. At a voltage of 40 V to 60 V, the sewage 2 can remove pollutants 15 properly and becomes almost clear. The pollutants 15 separated from the sewage 2 floated on the surface of the separation tank 8 or settled to the bottom. At voltages higher than 80 V, the once-agglomerated pollutants 15 do not grow into agglomerated particles and begin to disperse again in the sewage 2.
- sewage 2 has been substantially purified in a substantially clear water, 0.0 0 0 in 1 m lower current density than a / mm 2, sewage 1 is to turbidity, 0. 0 0 0 5 mA / mm 2 pollutants 1 5 at higher current density begins to re-dispersed in wastewater 2 There is a tendency.
- FIG. 5 shows the relationship between the time during which the sewage 2 passes through the voltage application area 14 (voltage application time) and the removal rate of the pollutant 15. Until the voltage application time exceeds 60 seconds, the removal rate sharply increases, and then, after a slight increase, reaches 90% to 97% in the elapsed time of 90 seconds. An approximately constant removal rate is maintained until 120 seconds elapse, but the removal rate starts to gradually decrease when the voltage application time exceeds 120 seconds, and rapidly decreases after 150 seconds. I do.
- the voltage applied to the electrodes 3a and 3b is 40 V to 60 V, and the current density between the electrodes 3a and 3b is 0.001 mA / mm 2 to 0.0.
- the removal rate indicates 80% to 9 7%
- purification is effective to line the wastewater t I was At this time, it was found that when the voltage application time was set to 60 seconds to 150 seconds, the voltage, current density, and voltage application time worked synergistically to dramatically improve the separation of pollutants 15. . Accordingly, the wastewater 2 containing concentrated wastewater, alcohol, sugar and the like, which is difficult to treat by the conventional method, is also used for the electrolyzed wastewater treatment apparatus 1 of the present invention. By applying the method, appropriate purification can be performed, and multifunctional wastewater treatment can be realized.
- the pollutants 15 can be appropriately separated and the wastewater 2 can be effectively purified.
- it is possible to appropriately purify concentrated wastewater, sewage 2 containing alcohol, sugar, etc. which is difficult to treat with conventional methods, and to realize multifunctional sewage treatment.
- the mounting plate 13 for mounting the electrodes 3a and 3b between the two partition plates 5a and 5b in the electrolytic tank 7 is divided into partition plates 5a. , 5b are arranged substantially perpendicular to the plate surface.
- a plurality of mounting plates 13 can be arranged in the same manner as in the first embodiment, and can be moved in parallel to the plate surfaces of the partition plates 5a and 5b in the direction of separation and contact. The number and the distance between the electrodes 3a, 3b can be adjusted.
- the mounting plate 13 is arranged at a substantially right angle with the partition plates 5a and 5b, and the electrodes 3a and 3b are at a substantially right angle with the partition plates 5a and 5b. Since the electrodes are arranged, the electrodes 3a and 3b are positioned so as to be substantially orthogonal to the peripheral region FF, and the influence from the peripheral regions F1 and F2 can be minimized. Thereby, it is possible to suppress the variation in the amount of current generated between the electrodes 3a and 3b due to the turbulence, and to continue the stable sewage treatment.
- the material of the electrodes 3a and 3b is made of an aluminum plate, but the material of the electrodes 3a and 3b may be any conductive material used for electrophoresis, for example.
- it may be made of metal such as copper-stainless steel, graphite (graphite), or carbon.
- the septic tank 4 is made of plastic, but the material of the septic tank 4 may be a metal as long as it has a structure capable of ensuring insulation from the electrodes 3a and 3b.
- the electrolytic sewage treatment apparatus of the present invention When the electrolytic sewage treatment apparatus of the present invention is used, the voltage applied between the electrodes 3a and 3b disposed in the electrolytic tank 7 and the voltage between the electrodes 3a and 3b By setting the current density and the voltage application time for sewage 1 passing between the electrodes 3a and 3b, etc., the pollutants 15 can be efficiently removed from the sewage 2, which is conventionally difficult to treat. Wastewater 1 containing high concentrations of pollutants 15 and wastewater 1 containing sugars and alcohols can be efficiently and stably treated. And so on.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/000573 WO2004065310A1 (ja) | 2003-01-22 | 2003-01-22 | 電気分解式汚水処理装置 |
AU2003303758A AU2003303758A1 (en) | 2003-01-22 | 2003-01-22 | Electrolysis sewage disposal equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/000573 WO2004065310A1 (ja) | 2003-01-22 | 2003-01-22 | 電気分解式汚水処理装置 |
Publications (1)
Publication Number | Publication Date |
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WO2004065310A1 true WO2004065310A1 (ja) | 2004-08-05 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/000573 WO2004065310A1 (ja) | 2003-01-22 | 2003-01-22 | 電気分解式汚水処理装置 |
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AU (1) | AU2003303758A1 (ja) |
WO (1) | WO2004065310A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3797871A1 (en) * | 2019-09-25 | 2021-03-31 | Korea Testing Laboratory | Water treatment apparatus using lamella structure |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1986000297A1 (en) * | 1984-06-27 | 1986-01-16 | Union Carbide Corporation | Enhanced conversion of syngas to liquid motor fuels |
JPH10244264A (ja) * | 1997-03-06 | 1998-09-14 | Masakazu Kuroda | リン酸イオン含有液よりのリン分離方法 |
JP2001232121A (ja) * | 2000-02-21 | 2001-08-28 | Yashima Denki Kk | 電気分解式汚水処理装置 |
JP2002282861A (ja) * | 2001-03-28 | 2002-10-02 | Hitachi Zosen Corp | 濁水処理方法 |
-
2003
- 2003-01-22 WO PCT/JP2003/000573 patent/WO2004065310A1/ja active Application Filing
- 2003-01-22 AU AU2003303758A patent/AU2003303758A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1986000297A1 (en) * | 1984-06-27 | 1986-01-16 | Union Carbide Corporation | Enhanced conversion of syngas to liquid motor fuels |
JPH10244264A (ja) * | 1997-03-06 | 1998-09-14 | Masakazu Kuroda | リン酸イオン含有液よりのリン分離方法 |
JP2001232121A (ja) * | 2000-02-21 | 2001-08-28 | Yashima Denki Kk | 電気分解式汚水処理装置 |
JP2002282861A (ja) * | 2001-03-28 | 2002-10-02 | Hitachi Zosen Corp | 濁水処理方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3797871A1 (en) * | 2019-09-25 | 2021-03-31 | Korea Testing Laboratory | Water treatment apparatus using lamella structure |
US11254591B2 (en) | 2019-09-25 | 2022-02-22 | Korea Testing Laboratory | Water treatment apparatus using lamella structure |
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Publication number | Publication date |
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AU2003303758A1 (en) | 2004-08-13 |
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