EP2384310A1 - Apparatus for the treating of waste waters - Google Patents

Apparatus for the treating of waste waters

Info

Publication number
EP2384310A1
EP2384310A1 EP10706762A EP10706762A EP2384310A1 EP 2384310 A1 EP2384310 A1 EP 2384310A1 EP 10706762 A EP10706762 A EP 10706762A EP 10706762 A EP10706762 A EP 10706762A EP 2384310 A1 EP2384310 A1 EP 2384310A1
Authority
EP
European Patent Office
Prior art keywords
section
cross
ejector
circuit
conduit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10706762A
Other languages
German (de)
French (fr)
Inventor
Adriano Troia
Daniele Angelo Madonna Ripa
Renato Spagnolo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Istituto Nazionale di Ricerca Metrologica (I N RI M)
Original Assignee
Istituto Nazionale di Ricerca Metrologica (I N RI M)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Istituto Nazionale di Ricerca Metrologica (I N RI M) filed Critical Istituto Nazionale di Ricerca Metrologica (I N RI M)
Publication of EP2384310A1 publication Critical patent/EP2384310A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4335—Mixers with a converging-diverging cross-section

Definitions

  • the present invention relates to the treatment of waste-waters from industrial facilities, and particularly to an apparatus for treating such wastewaters.
  • the object of the present invention is an apparatus for treating polluted waters comprising a tank adapted to contain waters to be treated, said tank being connected by means of an appropriate conduit to a pump provided with control and driving means, flow restriction means being provided downstream of said pump, the flow being transferred to said tank by means of a conduit, the circuit being provided with discharging means.
  • more than one flow restriction means can be provided to be arranged in the circuit of the apparatus of the invention, which more than one flow restriction means are arranged in parallel or in series to improve the operational efficiency of the same circuit.
  • the flow restriction means comprise a substantially tubular conduit having a variable inner free cross-section, and particularly provided with free cross-sections which are substantially identical to each other at both the ends thereof, while the portion comprised between the two ends is a reduced cross-section portion whose free cross-section is substantially from 1/3 to 1/10 the free cross-section at both the ends.
  • said free cross- section of said reduced cross-section portion is from about 1/4 to 1/8 the free cross-section at both the ends.
  • said reduced cross-section portion can be arranged near said flow inlet end of said conduit with respect to the flow of liquid to be treated.
  • the inner side walls of said conduit can be substantially continuously tapered from said ends towards said reduced cross-section portion. Particularly, the inclination of the inner side walls will have a slope change which is increased along the length running from the flow inlet end to said reduced cross-section portion.
  • said reduced cross- section portion can be formed by discretely changing, i.e. step-wise with steps constant or variable in height, the cross-section of the inner side walls of said conduit.
  • circuit of the apparatus of the invention can be provided with means to collect samples in order to monitor the processes being carried out, and with means to inject liquid and/or gaseous fluids into the same circuit in order to introduce agents which can enhance the degradation processes of the pollutants contained in the liquid being treated.
  • Figure 1 is a schematic diagram showing the apparatus according to the present invention.
  • Figure 2 is a cross-section view of an embodiment of the flow restriction means of the apparatus of the invention.
  • Figure 3 is a cross-section view of a variant embodiment of the flow restriction means of the apparatus of the invention.
  • FIGS 4 and 5 are diagrams showing the oscillation rate of the bubbles generated within the apparatus at two different operational speeds of the pump.
  • Figure 6 is a diagram showing the depletion of a pollutant versus the treatment time in the apparatus according to the invention.
  • FIG. 1 there is schematically shown the apparatus according to the present invention
  • reference numeral 1 denotes a tank into which the liquid intended to be treated by the apparatus of the invention is charged.
  • the liquid is introduced through a conduit 101 provided with monitoring means 111 ;
  • a conduit 2 of the circuit of the apparatus is connected to the conduit 111 , then a heat exchanger 201 is arranged within the tank 201.
  • the tank is connected to the conduit 2 of the circuit which is connected to a pump 3 controlled by an inverter 103 to allow for the adjustment thereof;
  • a discharge conduit 102 and a conduit 202 for collecting samples and feeding fluids are provided between the pump 3 and the tank 1.
  • a flow restriction means 4 in this case an appropriately shaped ejector, is inserted in the circuit downstream of the pump 3. As shown in the figure, more than one flow restriction means can be inserted in the circuit by providing a further branch 302 and a flow-monitoring means 312 for said branch.
  • An accelerometer 402 is arranged immediately downstream of the ejector 4 in order to monitor the oscillation rate of the bubbles being formed. Thereafter, the conduit 2 extends through the heat exchanger 502 and then into the conduit 101 to introduce the liquid into the tank 1.
  • FIG 2 there is shown an ejector of the type as used with the apparatus schematically shown in Figure 1.
  • the ejector 4 has an inlet port 104 substantially circular in cross-section, and an outlet port 204 having a similar cross-section.
  • the internal side wall of the ejector 4 Near the inlet port 104, the internal side wall of the ejector 4 has a tapered inlet portion 304 with an inclination of about 40° with respect to the central axis of said ejector 4 up to a reduced cross-section portion 404 having a cross-section which is about 1/4 the cross-section of the inlet port 104 of the ejector.
  • a tapered outlet portion 504 is formed following the reduced cross-section portion 404 and towards the outlet port 204, said tapered outlet portion 504 having an inclination of about 10° with respect to the axis of the ejector 4 and opposed to the inclination of the inlet portion 304.
  • the ejector 5 has an inlet port 105 and an outlet port 205 having substantially the same cross-section, and a reduced cross-section portion 305 substantially arranged at the middle of the ejector and having a cross- section which is about 1/8 the cross-section of the inlet and outlet ports. Between the inlet port 105 and the reduced cross-section portion there are formed a series of steps 405 having substantially the same height, as occurs similarly towards the outlet port 205 with steps 505.
  • the apparatus according to the present invention has been implemented in a prototype corresponding to the scheme of Figure 1 , comprising a centrifugal pump 3 with a polypropylene impeller driven by an AC motor controlled by the inverter 103 so as to change the revolution speed of the pump at a steady power level.
  • the maximum flow- rate of the pump used on the prototype is 300 litres per minute, but it can be easily adapted to meet the various needs of the end user.
  • the conduits of the circuit are made of PVC and iron internally coated with teflon of 1" ⁇ A (about 3.8 cm) in diameter:
  • the fluid flows through an ejector appropriately sized in relation to the cross-section of the inlet port, the tapering angles and the cross-section of the outlet port, depending on the kind of treatment to be carried out by the apparatus.
  • the diameter of the inlet portion is 34 mm and it is reduced to 8 mm at the central portion with an inclination of 40 degrees; the outlet portion is tapered with an angle of 10 degrees, so as the cavitation bubbles produced in the central portion collapse about 20 mm from the same central portion.
  • the efficiency in the production of cavitation and the amount of collapse suffered by the gaseous bubbles depend on the negative pressure generated within the central portion of the Venturi tube. This amount of negative pressure depends on structural details of the tube, particularly on the ratio between the cross-section of the inlet portion and the cross-section of the central portion according to the following mathematical relationship:
  • Pneg pressure at the central portion of the Venturi tube
  • P 0 ambient pressure value
  • p fluid density
  • u fluid speed
  • D 0Uf diameter of the central portion.
  • the turbulent flow generated at the outlet of the ejector travels a length of 140 cm and it is re-introduced into the circuit through a polypropylene tank so as to remove the turbulence generated within the conduits and achieve a bubble-free turbulent flow at the inlet of the ejector.
  • the oscillation rate of the bubbles generated by the Venturi tube can be estimated by using an accelerometer positioned downstream of the reduced cross-section portion. Measurements have been made at different revolution speeds of the motor based on an FFT (Fast Fourier Transform) operation.
  • FFT Fast Fourier Transform
  • Figure 4 there is shown the FFT graph at 1 ,800 rpm. The so- obtained rates correspond to 12.5 kHz and 100 kHz. By increasing the speed to 2,870 rpm, components ranging from 30 to 130 kHz in frequency are added randomly (Fig. 5).
  • the temperature of the fluid After 30 minutes the temperature of the fluid reaches 60 0 C and, after one hour, it is stabilized at 80°C even extending the functioning time.
  • the temperature of the solution does not exceed 33°C even after more than one hour of treatment.
  • the amount of solution needed to work at nominal capacity is about 7 litres.
  • the ejector 5 as shown in Figure 3 was successfully tested in the methylene blue degradation. Based on the FFT analysis of the signal from an accelerometer positioned downstream of the reduced cross-section portion, it was possible to estimate the oscillation rate of the bubbles with various low- frequency components, while the stepped shape partially removes the turbulence at the inlet of the reduced cross-section portion.
  • Application Example 1 Based on the FFT analysis of the signal from an accelerometer positioned downstream of the reduced cross-section portion, it was possible to estimate the oscillation rate of the bubbles with various low- frequency components, while the stepped shape partially removes the turbulence at the inlet of the reduced cross-section portion.
  • the measurement of the COD was carried out by using the kit Hach- Lange with a DR5000 spectrophotometer and an HTS 200 thermostat. In early experiments it was observed an increase in COD after treatment because the waste solutions contained a solid suspension which was not analyzed during the initial measurement of the COD, but which was dissolved and solubilized due to cavitation, resulting in an increase in COD during the final measurement.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Water Treatments (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Apparatus for treating polluted waters, comprising a circuit including a tank (1) adapted to contain waters to be treated, said circuit being provided with a feeding conduit (101) provided with control means (111), said tank (1) being connected by means of an appropriate conduit (2) to a pump (3) provided with control and driving means (103), flow restriction means (4) being provided downstream of said pump (3), the flow being transferred to said tank (1) by means of a conduit (2), said circuit being provided with discharging means (102).

Description

TEXT OF THE DESCRIPTION Apparatus for the treating of waste waters
The present invention relates to the treatment of waste-waters from industrial facilities, and particularly to an apparatus for treating such wastewaters.
A serious problem affecting most systems of treatment of wastewaters from industrial processes, and particularly the treatment of organic waste-waters, is that it is difficult to completely oxidize the substances contained therein by using substances which are not pollutants themselves and otherwise not able to generate pollutants. Furthermore, it is also extremely troublesome to obtain treatment processes having reduced power consumptions, which would be highly preferable.
However, recent additional restrictions relating to environmental protection on one hand and occupational safety on the other hand have increased the demand for waste-water treatment systems which can achieve high operational yields on one side, i.e. having a high neutralization ability of the existing pollutants, and which can function under high security conditions for both the facilities and the operators on the other side.
For a long time by now, a number of studies have been developed to determine the potential of systems which function by exploiting the interface of bubbles generated by different methods. Particularly during the research which led to the present invention, among the bubble generating methods, it has been contemplated the method of using a flow restriction able to generate a turbulence within the fluid. Surprisingly, the energies developed by this type of apparatus can achieve remarkable results in treating wastewaters.
Therefore, the object of the present invention is an apparatus for treating polluted waters comprising a tank adapted to contain waters to be treated, said tank being connected by means of an appropriate conduit to a pump provided with control and driving means, flow restriction means being provided downstream of said pump, the flow being transferred to said tank by means of a conduit, the circuit being provided with discharging means.
In a variant embodiment, more than one flow restriction means can be provided to be arranged in the circuit of the apparatus of the invention, which more than one flow restriction means are arranged in parallel or in series to improve the operational efficiency of the same circuit.
The flow restriction means comprise a substantially tubular conduit having a variable inner free cross-section, and particularly provided with free cross-sections which are substantially identical to each other at both the ends thereof, while the portion comprised between the two ends is a reduced cross-section portion whose free cross-section is substantially from 1/3 to 1/10 the free cross-section at both the ends. Preferably, said free cross- section of said reduced cross-section portion is from about 1/4 to 1/8 the free cross-section at both the ends.
Furthermore, said reduced cross-section portion can be arranged near said flow inlet end of said conduit with respect to the flow of liquid to be treated. The inner side walls of said conduit can be substantially continuously tapered from said ends towards said reduced cross-section portion. Particularly, the inclination of the inner side walls will have a slope change which is increased along the length running from the flow inlet end to said reduced cross-section portion. In another embodiment, said reduced cross- section portion can be formed by discretely changing, i.e. step-wise with steps constant or variable in height, the cross-section of the inner side walls of said conduit.
Furthermore, the circuit of the apparatus of the invention can be provided with means to collect samples in order to monitor the processes being carried out, and with means to inject liquid and/or gaseous fluids into the same circuit in order to introduce agents which can enhance the degradation processes of the pollutants contained in the liquid being treated. Other advantages and features of the apparatus according to the present invention will be apparent from the following description of an embodiment thereof, which is provided by way of illustration, and not by way of limitation, with reference to the accompanying drawings, wherein:
Figure 1 is a schematic diagram showing the apparatus according to the present invention;
Figure 2 is a cross-section view of an embodiment of the flow restriction means of the apparatus of the invention;
Figure 3 is a cross-section view of a variant embodiment of the flow restriction means of the apparatus of the invention;
Figures 4 and 5 are diagrams showing the oscillation rate of the bubbles generated within the apparatus at two different operational speeds of the pump; and
Figure 6 is a diagram showing the depletion of a pollutant versus the treatment time in the apparatus according to the invention.
In Figure 1 there is schematically shown the apparatus according to the present invention; reference numeral 1 denotes a tank into which the liquid intended to be treated by the apparatus of the invention is charged. The liquid is introduced through a conduit 101 provided with monitoring means 111 ; a conduit 2 of the circuit of the apparatus is connected to the conduit 111 , then a heat exchanger 201 is arranged within the tank 201. The tank is connected to the conduit 2 of the circuit which is connected to a pump 3 controlled by an inverter 103 to allow for the adjustment thereof; a discharge conduit 102 and a conduit 202 for collecting samples and feeding fluids are provided between the pump 3 and the tank 1.
A flow restriction means 4, in this case an appropriately shaped ejector, is inserted in the circuit downstream of the pump 3. As shown in the figure, more than one flow restriction means can be inserted in the circuit by providing a further branch 302 and a flow-monitoring means 312 for said branch. An accelerometer 402 is arranged immediately downstream of the ejector 4 in order to monitor the oscillation rate of the bubbles being formed. Thereafter, the conduit 2 extends through the heat exchanger 502 and then into the conduit 101 to introduce the liquid into the tank 1.
In Figure 2 there is shown an ejector of the type as used with the apparatus schematically shown in Figure 1. The ejector 4 has an inlet port 104 substantially circular in cross-section, and an outlet port 204 having a similar cross-section. Near the inlet port 104, the internal side wall of the ejector 4 has a tapered inlet portion 304 with an inclination of about 40° with respect to the central axis of said ejector 4 up to a reduced cross-section portion 404 having a cross-section which is about 1/4 the cross-section of the inlet port 104 of the ejector. A tapered outlet portion 504 is formed following the reduced cross-section portion 404 and towards the outlet port 204, said tapered outlet portion 504 having an inclination of about 10° with respect to the axis of the ejector 4 and opposed to the inclination of the inlet portion 304.
In Figure 3 there is shown a variant embodiment of the liquid flow restriction means of the apparatus according to the present invention; in this case, the ejector 5 has an inlet port 105 and an outlet port 205 having substantially the same cross-section, and a reduced cross-section portion 305 substantially arranged at the middle of the ejector and having a cross- section which is about 1/8 the cross-section of the inlet and outlet ports. Between the inlet port 105 and the reduced cross-section portion there are formed a series of steps 405 having substantially the same height, as occurs similarly towards the outlet port 205 with steps 505.
The operation of the apparatus according to the present invention will become apparent from the following. The apparatus according to the present invention has been implemented in a prototype corresponding to the scheme of Figure 1 , comprising a centrifugal pump 3 with a polypropylene impeller driven by an AC motor controlled by the inverter 103 so as to change the revolution speed of the pump at a steady power level. The maximum flow- rate of the pump used on the prototype is 300 litres per minute, but it can be easily adapted to meet the various needs of the end user. The conduits of the circuit are made of PVC and iron internally coated with teflon of 1" ΛA (about 3.8 cm) in diameter: The fluid flows through an ejector appropriately sized in relation to the cross-section of the inlet port, the tapering angles and the cross-section of the outlet port, depending on the kind of treatment to be carried out by the apparatus.
In the case of the prototype described herein, the diameter of the inlet portion is 34 mm and it is reduced to 8 mm at the central portion with an inclination of 40 degrees; the outlet portion is tapered with an angle of 10 degrees, so as the cavitation bubbles produced in the central portion collapse about 20 mm from the same central portion.
The efficiency in the production of cavitation and the amount of collapse suffered by the gaseous bubbles depend on the negative pressure generated within the central portion of the Venturi tube. This amount of negative pressure depends on structural details of the tube, particularly on the ratio between the cross-section of the inlet portion and the cross-section of the central portion according to the following mathematical relationship:
wherein:
Pneg= pressure at the central portion of the Venturi tube;
P0 = ambient pressure value; p = fluid density; u = fluid speed;
Din = diameter of the inlet portion;
D0Uf = diameter of the central portion. The turbulent flow generated at the outlet of the ejector travels a length of 140 cm and it is re-introduced into the circuit through a polypropylene tank so as to remove the turbulence generated within the conduits and achieve a bubble-free turbulent flow at the inlet of the ejector.
The oscillation rate of the bubbles generated by the Venturi tube can be estimated by using an accelerometer positioned downstream of the reduced cross-section portion. Measurements have been made at different revolution speeds of the motor based on an FFT (Fast Fourier Transform) operation. In Figure 4 there is shown the FFT graph at 1 ,800 rpm. The so- obtained rates correspond to 12.5 kHz and 100 kHz. By increasing the speed to 2,870 rpm, components ranging from 30 to 130 kHz in frequency are added randomly (Fig. 5).
After 30 minutes the temperature of the fluid reaches 600C and, after one hour, it is stabilized at 80°C even extending the functioning time.
Although an increase in temperature could be useful to enhance some processes, it was necessary to thermostat the system in order to discriminate the effects of temperature from those of cavitation. Therefore, two heat exchangers consisting of an iron tube wrapped by a copper coil into which water flows were added to the circuit, which tube is internally coated with teflon to prevent potential contaminations of the solutions under investigation.
In this way, the temperature of the solution does not exceed 33°C even after more than one hour of treatment. The amount of solution needed to work at nominal capacity is about 7 litres.
In the bottom part of the circuit there is an acid-resistant PVC ball- valve to allow the solution to be discharged. After the valve, at the beginning of the liquid sucking section, a Swagelok®-type connector was inserted to introduce different gases into the solution or to obtain samples from the solutions under treatment.
The ejector 5 as shown in Figure 3 was successfully tested in the methylene blue degradation. Based on the FFT analysis of the signal from an accelerometer positioned downstream of the reduced cross-section portion, it was possible to estimate the oscillation rate of the bubbles with various low- frequency components, while the stepped shape partially removes the turbulence at the inlet of the reduced cross-section portion. Application Example
Early experiments were performed using a solution of 2.70 mM phenol in the presence of H2O2 (1.5 g/l). A volume of 7.5 litres of this solution was treated by the hydrodynamic cavitation prototype for 2 hours. The results as illustrated in Figure 7 show that, after 2 hrs, the phenol was only present in traces. Thereafter, solutions of industrial wastes from food industries were treated. The COD (Chemical Oxygen Demand) of these solutions was 8,000 mg/l. The small amount of sample required a dilution of 1 to 7 in order to treat a solution of 8 litres. All degradation experiments of these solutions were performed using this dilution procedure.
The measurement of the COD was carried out by using the kit Hach- Lange with a DR5000 spectrophotometer and an HTS 200 thermostat. In early experiments it was observed an increase in COD after treatment because the waste solutions contained a solid suspension which was not analyzed during the initial measurement of the COD, but which was dissolved and solubilized due to cavitation, resulting in an increase in COD during the final measurement.
This indicates that the method can also be used to treat heterogeneous (solid-liquid) solutions, but it also implies a preliminary step in order to avoid excessive changes in the fluid-dynamics of the solution and a delayed treatment time. Therefore, in subsequent experiments, it was sought to limit the presence of the solid in order to verify the efficiency of the prototype with the solution. In these treatments it was observed a decrease in COD of 60% in the presence of H2O2 (2 g/l).

Claims

1. Apparatus for treating polluted waters, comprising a circuit including a tank adapted to contain waters to be treated, said circuit being provided with a feeding conduit provided with monitoring means, said tank being connected by means of an appropriate conduit to a pump provided with control and driving means, flow restriction means being provided downstream of said pump, the flow being transferred to said tank by means of a conduit, said circuit being provided with discharging means.
2. Apparatus according to claim 1 , wherein more than one flow restriction means are provided to be arranged in the circuit of the apparatus of the invention, said more than one flow restriction means being arranged in parallel or in series.
3. Apparatus according to any one of the preceding claims 1 or 2, wherein said flow restriction means comprise a substantially tubular ejector having a variable inner free cross-section.
4. Apparatus according to claim 3, wherein the inlet end port and the outlet end port of said ejector have substantially the same free cross-section, while the portion comprised between the two ends is a reduced cross-section portion whose free cross-section is substantially from 1/3 to 1/10 the free cross-section at both the ends.
5. Apparatus according to claim 4, wherein said free cross-section of said reduced cross-section portion is from about 1/4 to 1/8 the free cross-section at both the ends.
6. Apparatus according to claim 4 or 5, wherein said reduced cross- section portion is arranged near said flow inlet end of said ejector.
7. Apparatus according to any one of the preceding claims 4 to 6, wherein the inner side walls of said ejector are substantially continuously tapered from said ends towards said reduced cross-section portion.
8. Apparatus according to claim 7, wherein the inclination of the inner side walls has a slope change which is increased along the length comprised between the inlet end and said reduced cross-section portion.
9. Apparatus according to any one of the preceding claims 4 to 6, wherein said reduced cross-section portion is formed by discretely changing the cross-section of the inner side walls of said ejector.
10. Apparatus according to any one of the preceding claims 1 to 9, characterized in that it further comprises means to collect samples and means to inject liquid and/or gaseous fluids.
EP10706762A 2009-01-09 2010-01-08 Apparatus for the treating of waste waters Withdrawn EP2384310A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITGE2009A000001A IT1392647B1 (en) 2009-01-09 2009-01-09 APPARATUS FOR THE TREATMENT OF POLLUTED WASTE WATERS.
PCT/IT2010/000003 WO2010079523A1 (en) 2009-01-09 2010-01-08 Apparatus for the treating of waste waters

Publications (1)

Publication Number Publication Date
EP2384310A1 true EP2384310A1 (en) 2011-11-09

Family

ID=40908473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10706762A Withdrawn EP2384310A1 (en) 2009-01-09 2010-01-08 Apparatus for the treating of waste waters

Country Status (3)

Country Link
EP (1) EP2384310A1 (en)
IT (1) IT1392647B1 (en)
WO (1) WO2010079523A1 (en)

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Publication number Priority date Publication date Assignee Title
EP3659977B1 (en) * 2018-11-27 2021-12-15 Steinhardt GmbH Device for the treatment of liquids by means of hydromechanical cavitation and vacuum

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US5326468A (en) * 1992-03-02 1994-07-05 Cox Dale W Water remediation and purification method and apparatus
US6502979B1 (en) * 2000-11-20 2003-01-07 Five Star Technologies, Inc. Device and method for creating hydrodynamic cavitation in fluids
JP2004057936A (en) * 2002-07-29 2004-02-26 Babcock Hitachi Kk Water cleaning apparatus and nozzle for cavitation reactor used therein
DE10258898A1 (en) * 2002-12-17 2004-07-01 Institut für Energetik und Umwelt gGmbH Inactivation of microorganisms using cavitation generator, introduces high level of destructive ultrasonic energy into fluid containing them
DE102004045915A1 (en) * 2004-09-20 2006-03-30 Schmid, Andreas, Dr.-Ing. M.Sc. Disinfection of water (e.g. to produce drinking water) involves use of a pipe with a constriction which is used to generate cavitation
JP4840563B2 (en) * 2005-03-29 2011-12-21 株式会社安川電機 Sewage treatment equipment
JP2007203229A (en) * 2006-02-03 2007-08-16 Mitsuishi Seisakusho:Kk System of decomposing organic compound

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Title
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Also Published As

Publication number Publication date
ITGE20090001A1 (en) 2010-07-10
WO2010079523A1 (en) 2010-07-15
IT1392647B1 (en) 2012-03-16

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