WO1995024963A1 - Method of treatment of water polluted predominantly by an oily component using bentonite - Google Patents
Method of treatment of water polluted predominantly by an oily component using bentoniteInfo
- Publication number
- WO1995024963A1 WO1995024963A1 PCT/CZ1995/000002 CZ9500002W WO9524963A1 WO 1995024963 A1 WO1995024963 A1 WO 1995024963A1 CZ 9500002 W CZ9500002 W CZ 9500002W WO 9524963 A1 WO9524963 A1 WO 9524963A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bentonite
- treatment
- water
- predominantly
- mixture
- Prior art date
Links
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000000440 bentonite Substances 0.000 title claims abstract description 25
- 229910000278 bentonite Inorganic materials 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 15
- 238000003801 milling Methods 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000007900 aqueous suspension Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 10
- 239000000725 suspension Substances 0.000 abstract description 5
- 230000001133 acceleration Effects 0.000 abstract description 2
- 235000012216 bentonite Nutrition 0.000 description 22
- 239000000126 substance Substances 0.000 description 12
- 239000002253 acid Substances 0.000 description 5
- 238000001994 activation Methods 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 244000144992 flock Species 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical group O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
Definitions
- the invention solves a method of bentonite activation by means of a mechanical and physical treatment of this substance
- Up-grading of bentonite by means of mineral acids are also known, e.g. using hydrochloric and/ or sulphuric acid. These acids are mixed with bentonite at elevated temperatures under vigorous stirring. By this procedure, the metallic part of the basic material is extracted and the rest material increases its volume simultaneously, as well as micropores increase their size.
- the subsequent extraction e.g. by hydrochloric acid is performed but the absorption ability of the activated bentonite may be reduced.
- the continuous counter-current activation of bentonite is a more modern method being performed up to the boiling point in two up to four steps.
- the fine-grain suspension of bentonite enters the first step, and salts of extracted-out metals and rest acid are outgoing into the last step, the solution of an acid goes in, and the suspension of extracted bentonite goes out. In the further processing, this is washed-through, dried, milled, and classified.
- the disadvantage of hitherto given activation methods is a high consumption of chemicals, salting of wastewater, high energy demand, and supplementary costs for treatment of water outgoing from activation process and from washing-through of activated bentonite.
- the water after treatment contained 0.032 mg/ 1 NEC.
- the method according to the invention can be also applied in analogical processes where fine milling and mixing is important, e.g. for loose powder materials in liquids in order to prepare suspensions or emulsions from liquids and different substances, not only from bentonites.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Analytical Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Firstly, the natural bentonite is mixed e.g. with polluted water, and then a stream of this mixture is made, being put advantageously into the milling/mixing pump. In this pump the mixture is pressurized in the range 0.1 - 1000 MPa and milled and stirred under local alternative acceleration and retardation in the range 5 - 500 m/s. The originated suspension can be further activated by an organic flocculant.
Description
Method of treatment of water polluted predominantly by an oily component using bentonite
The invention solves a method of bentonite activation by means of a mechanical and physical treatment of this substance
Until now, sorption properties of bentonite and other clays from the montmorillonite group can be enhanced by their chemical treatment. The reason for such treatment is cracking of tiny bentonite grains aiming at enhancing their volume. For example, the mechanical and chemical treatment of bentonite water suspension in the ferrous (Fe2+), ferric (Fe3+), or aluminium
(Al3+) cycle is well known, in amount dependent on water pollution. Other known bentonite beneficiation in the water suspension is based on the wet milling of the clay with activation chemicals such as with chlorides, sulphates, nitrates, hydroxides, and phosphates depending on the amount of bentonite used.
Up-grading of bentonite by means of mineral acids are also known, e.g. using hydrochloric and/ or sulphuric acid. These acids are mixed with bentonite at elevated temperatures under vigorous stirring. By this procedure, the metallic part of the basic material is extracted and the rest material increases its volume simultaneously, as well as micropores increase their size.
After that, extracted-out metallic salts and the excessing acid are separated and the resulting product is washed through, dried, and milled.
Sometimes the subsequent extraction, e.g. by hydrochloric acid is performed but the absorption ability of the activated bentonite may be reduced.
The continuous counter-current activation of bentonite is a more modern method being performed up to the boiling point in two up to four steps. The fine-grain suspension of bentonite enters the first step, and salts of extracted-out metals and rest acid are outgoing into the last step, the solution of an acid goes in, and the suspension of extracted bentonite goes out. In the further processing, this is washed-through, dried, milled, and classified.
The disadvantage of hitherto given activation methods is a high consumption of chemicals, salting of wastewater, high energy demand, and supplementary costs for treatment of water outgoing from activation process and from washing-through of activated bentonite.
The absences given above are minimalized by the method of treatment of water polluted predominantly by an oily component using bentonite at the temperature of the environment. The subject of this method is mixing the loose natural bentonite with polluted water followed by sucking and pressurizing this mixture at 0.1 - 1000 MPa, and after that is is alternatively accelerated and retarded in the speed range of 5 - 500 m/s under milling and intensive mixing.
Before mixing the component, it is possible to add organic flocculant into the suspension. The method according to the invention has been proved in a plant treating industrial wastewaters. Its advantage is no necessity to utilize chemical admixtures, markable increasing of sorption properties of activated bentonite, and lowering the impact of waste chemicals on the environment.
EXAMPLE
Example No.1
For 1 cubic meter of wastewater originating from car washing station, having its temperature 5°C, and containing 0.52 mg/ 1 of non-polar extractable compounds (NEC), 2 kilograms of milled natural non-activated bentonite (Obrnice deposit, Czech Republic) were added through the hopper of the milling/mixing
pump. The mixture was sucked by the milling/ mixing pump and pressurized on 0.3 MPa. Then it was milled and at the same time stirred at the local alternating acceleration and retardation in the range 5-500 m/s. By this procedure, bentonite became activated and oily substances got adsorbed on its grains. Then, lg of the cation-active polymeric flocculant on 1kg of bentonite was added. The flocks had been created followed by their rapid
sedimentation. The water after treatment was subjected to chemical analysis and it was proved that the content of oily substances (NEC) dropped down to 0.257 mg/ 1.
Example No .2
For 1 cubic meter of the same wastewater, 5 kg of the same bentonite as in the example 1 was dosed through the
hopper of the mixing/milling pump. By the same procedure, the water after treatment contained 0.032 mg/ 1 NEC.
Example No.3
To 1 cubic meter of the polluted wastewater from the carwash station, containing 0.52 mg/ 1 NEC, the used motoroil was added resulting i n the increasing NEC value amounting 4 000 mg/ 1. Through the hopper of the milling/mixing pump, 4.44 kg of the natural milled bentonite (Obrnice deposit, Czech Republic) was added. The mixture was sucked by the milling/mixing pump and pressurized on 0.5 MPa. By the previous procedures given in examples No.1 and 2, respectively bentonite became activated, oils became emulsified, and different oily substances were sorbed onto bentonite grains. After adding 2g cation-active polymeric flocculant (based on 1kg of bentonite), flocks originated followed by their rapid sedimentation. The water after treatment contained 0.24mg/1 NEC.
The method according to the invention can be also applied in analogical processes where fine milling and mixing is important, e.g. for loose powder materials in liquids in order to prepare suspensions or emulsions from liquids and different substances, not only from bentonites.
Claims
Method of treatment of water polluted predominantly by an oily component using bentonite in the form of water suspension which is processed at the temperature of the environment, c h a r a ct e r i z e d t h e r e i n, that natural bentonite is mixed with water, followed by making a stream from this mixture which is pressurized on 0.1 - 1000 MPa, and then the stream is alternatively accelerated and retarded in the range of speeds 5 - 500 m/s, under milling and vigorous stirring the mixture.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP95911188A EP0701476A1 (en) | 1994-03-16 | 1995-03-14 | Method of treatment of water polluted predominantly by an oily component using bentonite |
| SK1506-95A SK150695A3 (en) | 1994-03-16 | 1995-03-14 | Method of treatment of water polluted predominantly by an oily component using bentonite |
| PL95311560A PL311560A1 (en) | 1994-03-16 | 1995-03-14 | Method of purifying oil-contaminated water by means of bentonite |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZPV597-94 | 1994-03-16 | ||
| CZ94597A CZ59794A3 (en) | 1994-03-16 | 1994-03-16 | Method of treating water contaminated predominantly with oil component by the action of bentonite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1995024963A1 true WO1995024963A1 (en) | 1995-09-21 |
Family
ID=5461957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CZ1995/000002 WO1995024963A1 (en) | 1994-03-16 | 1995-03-14 | Method of treatment of water polluted predominantly by an oily component using bentonite |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0701476A1 (en) |
| CZ (1) | CZ59794A3 (en) |
| PL (1) | PL311560A1 (en) |
| SK (1) | SK150695A3 (en) |
| WO (1) | WO1995024963A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999058218A1 (en) * | 1998-05-14 | 1999-11-18 | Amcol International Corporation | Method and apparatus for removing oil from water |
| US6235201B1 (en) | 1998-05-14 | 2001-05-22 | Amcol International Corporation | Method and apparatus for removing oil from water including monitoring of adsorbent saturation |
| US6358422B1 (en) | 1998-05-14 | 2002-03-19 | Amcol International Corporation | Method and apparatus for removing oil from water including monitoring of absorbent saturation |
| US6409924B1 (en) * | 1998-05-14 | 2002-06-25 | Amcol International Corporation | Method for removing oil from water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU59593A1 (en) * | 1968-10-12 | 1970-01-09 | ||
| EP0000674A1 (en) * | 1977-07-21 | 1979-02-07 | TECHNIME S.A. Société anonyme dite: | Method for breaking up emulsions and means for carrying out this method. |
| DE3324425A1 (en) * | 1983-07-07 | 1985-01-17 | Ralf F. Piepho Abwassertechnik Gmbh, 3015 Wennigsen | METHOD FOR SEPARATING HYDROCARBONS FROM WATER, IN PARTICULAR GROUND WATER |
-
1994
- 1994-03-16 CZ CZ94597A patent/CZ59794A3/en unknown
-
1995
- 1995-03-14 SK SK1506-95A patent/SK150695A3/en unknown
- 1995-03-14 EP EP95911188A patent/EP0701476A1/en not_active Ceased
- 1995-03-14 WO PCT/CZ1995/000002 patent/WO1995024963A1/en not_active Application Discontinuation
- 1995-03-14 PL PL95311560A patent/PL311560A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU59593A1 (en) * | 1968-10-12 | 1970-01-09 | ||
| EP0000674A1 (en) * | 1977-07-21 | 1979-02-07 | TECHNIME S.A. Société anonyme dite: | Method for breaking up emulsions and means for carrying out this method. |
| DE3324425A1 (en) * | 1983-07-07 | 1985-01-17 | Ralf F. Piepho Abwassertechnik Gmbh, 3015 Wennigsen | METHOD FOR SEPARATING HYDROCARBONS FROM WATER, IN PARTICULAR GROUND WATER |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999058218A1 (en) * | 1998-05-14 | 1999-11-18 | Amcol International Corporation | Method and apparatus for removing oil from water |
| GB2352986A (en) * | 1998-05-14 | 2001-02-14 | Amcol International Corp | Method and apparatus for removing oil from water |
| US6235201B1 (en) | 1998-05-14 | 2001-05-22 | Amcol International Corporation | Method and apparatus for removing oil from water including monitoring of adsorbent saturation |
| GB2352986B (en) * | 1998-05-14 | 2002-02-27 | Amcol International Corp | Method and apparatus for removing oil from water |
| US6358422B1 (en) | 1998-05-14 | 2002-03-19 | Amcol International Corporation | Method and apparatus for removing oil from water including monitoring of absorbent saturation |
| US6398951B1 (en) * | 1998-05-14 | 2002-06-04 | Amcol International Corporation | Method and apparatus for removing oil from water including monitoring of adsorbent saturation |
| US6398966B1 (en) | 1998-05-14 | 2002-06-04 | Amcol International Corporation | Method for removing oil from water including monitoring of adsorbent saturation |
| US6409924B1 (en) * | 1998-05-14 | 2002-06-25 | Amcol International Corporation | Method for removing oil from water |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0701476A1 (en) | 1996-03-20 |
| CZ280037B6 (en) | 1995-10-18 |
| CZ59794A3 (en) | 1995-10-18 |
| SK150695A3 (en) | 1996-03-06 |
| PL311560A1 (en) | 1996-02-19 |
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