WO1998025858A1 - Closed-loop wastewater treatment system - Google Patents
Closed-loop wastewater treatment system Download PDFInfo
- Publication number
- WO1998025858A1 WO1998025858A1 PCT/US1997/023230 US9723230W WO9825858A1 WO 1998025858 A1 WO1998025858 A1 WO 1998025858A1 US 9723230 W US9723230 W US 9723230W WO 9825858 A1 WO9825858 A1 WO 9825858A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wastewater
- treatment
- remove
- therefrom
- water
- Prior art date
Links
- 238000004065 wastewater treatment Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000002351 wastewater Substances 0.000 claims abstract description 29
- 239000007787 solid Substances 0.000 claims abstract description 22
- 238000006065 biodegradation reaction Methods 0.000 claims abstract description 7
- 150000002484 inorganic compounds Chemical class 0.000 claims abstract description 4
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 4
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 3
- 238000009300 dissolved air flotation Methods 0.000 claims description 17
- 244000005700 microbiome Species 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 238000001223 reverse osmosis Methods 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000011368 organic material Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 150000002739 metals Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 16
- 235000012206 bottled water Nutrition 0.000 abstract description 2
- 239000003651 drinking water Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 description 7
- 241000276438 Gadus morhua Species 0.000 description 5
- 235000019516 cod Nutrition 0.000 description 5
- 150000002894 organic compounds Chemical class 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000011780 sodium chloride Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- 239000002028 Biomass Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000001580 bacterial Effects 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 239000005446 dissolved organic matter Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L Iron(II) sulfate Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 235000015450 Tilia cordata Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000004059 degradation Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001737 promoting Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009988 textile finishing 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
- C02F9/00—Multistage treatment of water, waste water, or sewage
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F2103/06—Contaminated groundwater or leachate
-
- 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
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
A closed-loop wastewater treatment system subjects untreated wastewater to a series of treatment processes until a desired water quality is achieved. During primary treatment, total suspended solids, heavy metals and inorganic compounds are removed. Biodegradable components are thereafter removed by subjecting the wastewater to a secondary treatment. Non-biodegradable components are removed from the wastewater during tertiary treatment thereof. The closed-loop treatment system produces a high quality water comparable to, or in many cases better than, commercially available potable water.
Description
CLOSED-LOOP WASTEWATER TREATMENT SYSTEM
BACKGROUND OF THE INVENTION
1. Field Of The Invention
This invention relates to wastewater treatment systems; and more particularly to a system for removing BOD5 and TSS from discharge wastewater such as raw or untreated industrial process water, contaminated storm water or contaminated groundwater.
2. Description Of The Prior Art
Increased consumption of water for industrial applications has caused the water quality to deteriorate in many locations. Water shortages have emerged and the cost of water management has risen. The increased water usage has created pressure on municipal authorities to upgrade or expand their plants to meet current demand. Plant expansions have, in turn, increased costs of buying water, as well as costs associated with the discharge of wastewater and payment of surcharges.
SUMMARY OF THE INVENTION
The present invention provides a closed-loop wastewater treatment system that virtually eliminates the need for purchase of water from municipalities as well as the necessity for discharge of water to the municipalities. Regulations heretofore applicable to facilities which discharge wastewater are avoided and BOD5, TSS and other surcharges are eliminated. Water of high quality is consistently produced and the cost of water is reduced.
Generally stated, the system provides for wastewater such as raw or untreated industrial process water, contaminated storm water or contaminated groundwater to be passed through a series of treatment processes until a desired quality is achieved. The wastewater treatment process comprises the steps of primary treatment, secondary or biological treatment and tertiary treatment, which are described hereinafter in connection with their application in the treatment system.
BRIEF DESCRIPTION OF THE DRAWING
The invention will be more fully understood and further advantages will become apparent when reference is had to the following detailed description and the accompanying drawing, in which
Fig 1 is a process flow diagram of a closed loop wastewater treatment system utilizing primary treatment, secondary or biological treatment and tertiary treatment steps
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to drawing Fig 1, primary treatment is carried out in Rotoshear 10 A screening system is designed to separate coarse (greater than 0 02 inch particle size) solids from the process This process is used to overcome plugging problems and minimize maintenance related work
Once large particulate matter is removed, the water is transferred to an equalization system 12 The equalization system 12 is designed to overcome the operational problems caused by variations in influent flow rate, concentration and pH
Wastewater from equalization system 12 is transferred to primary settling or floating tank P-DAF 14 for clarification or dissolved air flotation treatment During this treatment step, total suspended solids (TSS), heavy metals and other inorganic compounds found in many types of wastewater are removed Polymers are added to aid solids settling or floating, and facilitate solids removal
Once inorganic components of the wastewater are removed, the fluids are subjected to a secondary or biological treatment An immobilized cell bioreactor (ICB) 16 removes dissolved organic matter found in the wastewater The ICB is a fixed-film biological system designed for high efficiency in the removal of the dissolved organic matter In addition, ICB provides significant advantages in operation BOD5 and priority pollutants are removed ICB generates less biological solids than other biological processes, ultimately reducing sludge disposal costs The ICB system is physically compact, and can be custom designed to fit in small footprints ICB is an easier system to use, more reliable in operation and less expensive to maintain than other biological treatment systems
During residence in the ICB system, the microorganisms, in the presence of air, metabolize biodegradable compounds (BOD) into carbon dioxide (CO2), water, new
microorganisms and energy Nutrients such as phosphate and ammonia are added to augment biological activity and growth
Fluids from the ICB are transferred to secondary claπfier or dissolved air flotation chamber 18 Biological solids produced by conversion of BOD5 using microorganisms in the ICB system are removed from the wastewater stream by DAF/claπfier 18 Bio-solids removal minimizes odor and algae growth in tanks and piping systems in contact with the wastewater The DAF/claπfier 18 utilizes rapid mixing, flocculation, chemical control and application Polymers are added to aid solids settling and removal
Fluids from DAF/claπfier 18 are transferred to vessel 20 for tertiary treatment Duπng tertiary treatment no biodegradable components of wastewater are removed The system design entails either a single process or a series of processes to achieve final design requirements In most cases, activated carbon is used to remove color and hard to remove organic material from the wastewater The system design includes a reverse osmosis (RO
22) system to remove chloride and/or total dissolved solids (TDS) The application of the closed-loop treatment system is especially suited to produce a high quality water comparable to, or in many cases better than, commercially available potable water
The following examples are presented to provide a more complete understanding of the invention The specific techniques, conditions, materials, proportions and reported data set forth to illustrate the principles and practice of the invention are exemplary and should not be construed as limiting the scope of the invention
Example 1
A closed-loop water recycling pilot system was installed at a textile finishing plant that utilized the "stone washing" process of blue jeans and other clothing This process is illustrated in Fig 2 Water from the laundry washers 1 flows to a catch basin 2 from which it is pumped to a shaker screen 3 where gross solids such as strings and fiber are removed The partially clarified water flows to a Equalization tank 4 Water from the equalization tank flows into a combined lamella claπfier/ primary Dissolved Air Flotation (DAF) system 5 that removes the suspended solids and fine fibers The clarified watei then flows into an
Immobilized Cell Bioreactor or ICB 6 where soluble organic compounds are removed by biological degradation The effluent from the ICB flows into a secondary DAF system 7 that
removes the suspended biological solids The water from the secondary DAF flows into a clean water holding tank 8 that acts as a water reservoir for the laundry washers 1
Three factors which prevent the reuse of washing water for further washes are 1) suspended solids (measured as mg/L of TSS) which act to stain the washed jeans, 2) soluble organic compounds (measured as mg/L of BOD and COD) which interferes with the bleaching process and 3) hardness (measured in mg L) which leads to streaking of the washed and bleached jeans The effect of the treatment process train on these parameters is shown in table 1
Table 1 Removal of soluble organic compounds (COD/BOD), suspended solids (TSS) and hardness (mg/L) during treatment of wash water in a closed -loop water recycling system
BOD (mg/L) 400 400 <50 <30
TSS (mg/L) 1,000 <30 50 <5
Hardness 100-300 100-300 100-150 50-100
(mg L)
The wash water present in the catch basin contained a relatively high amount of soluble organic compounds (measured as COD and BOD) derived form soaps and detergents added to the wash and from starch which impregnates the jeans and other clothing It also contained stπngs and large pieces of fabric as well as dispersed fine fibers from the mechanical effects of washing The hardness of the water was about 300 mg/L The shaker screen acted to remove the larger pieces of fabπc but had little or no effect on soluble orgamcs and hardness nor even the fine, dispersed fiber (TSS) The fine TSS mateπal was reduced in the primary DAF from a level of about 1,000 mg/L to <30 mg/L There was little removal of either COD, BOD or Hardness in this step
The ICB process was effective at removing soluble organic compounds but was also, effective at removing hardness Hardness is normally removed by ion exchange or RO membranes The effectiveness of the ICB system to remove hardness is an unexpected result of this process design for water recycling and enables the water to be recycled much more efficiently and cost effectively The final DAF system reduced residual biological solids and produced a water of high quality that could be reused in the washing process
The closed loop recycle system reduced COD in the washwater by >87%, BOD by >92%, TSS by >99% and hardness by 66% The unique combination of primary DAF, ICB biotreatment and secondary DAF treatment enabled washwater to be recycled without the use of expensive ion exchange or reverse osmosis membrane treatment
Example 2
The process of Example 1 was carried out and the build upon of salt was measured by mg/L of total dissolved solids (TDS) The results of this measurement are shown in Fig 3 After 9 recycles of the same batch of water the TDS had increased from only 1,500 mg/L to 4,500 mg/L The closed-loop water recycle system enabled the plant to use recycled water for washing textiles greater than 90% of the time without the use of a desalting membrane step The results shown in Fig 3 show that another limiting factor for the recycle of water for washing of textiles, namely, the build up of salt in the recycled water, was substantially eliminated by the ICB system Conventional biological treatment systems promote the active growth of bacteria to maintain a high level of bacterial activity This requires the addition of nitrogen and phosphate salts Furthermore, additional salts such as lime or ferrous sulfate are added as a flocculation and settling aid for removing excess biomass in the secondary clarification step The ICB system is a unique fixed film bioreactor technology that maintains biomass by entrapment rather than promoting bacterial growth This enables lower doses of nutrients to be used and the small amount of biomass produced can be removed in the secondary DAF by using organic polymers without the use of salt based settling agents As a result, the water can be recycled many times without the use of a membrane step for salt removal
Example 3
A full scale closed loop water recycle system was installed at a commercial textile washing plant. This system is illustrated in Fig.4. The system consisted of a below ground catch tank, a rotoshear screen, an equalization and feed tank, a primary DAF system, an ICB vessel, a secondary DAF system, a catch tank and a clean water storage tank. This system recycled water from the plant's laundry washers at a rate of 100,000 gpd. This system was designed to treat washwater with a BOD of 700 mg/L, a TSS of 200 mg/L and a pH of 4-7 S.U. and produce a clean water for reuse containing a BOD of <30 mg/L, a TSS of <30 mg/L and a pH of 6-8 S.U. The closed loop water recycle system enabled the plant to use recycled water for >90% of the textile washings.
Having thus described the invention in rather full detail, it will be understood that such detail need not be strictly adhered to but that various changes and modifications may suggest themselves to one skilled in the art, all falling within the scope of the present invention as defined by the subjoined claims.
Claims
What is claimed is:
A system for treatment of wastewater, comprising the steps of
(a) subjecting such wastewater to a primary treatment to remove total suspended solids, heavy metals and inorganic compounds therefrom,
(b) subjecting said wastewater to a secondary treatment to remove biodegradable components therefrom, and
(c) subjecting said wastewater to a tertiary treatment to remove non- biodegradable components therefrom
2 A system for treatment of wastewater, as recited by claim 1, wherein said primary treatment step further comprises the steps of (i) screening said wastewater to separate coarse solids therefrom, (ii) equalizing said wastewater to overcome operational problems caused by influent flow rate, concentrations and pH variations, and
(iii) clarifying or treating said wastewater by dissolved air flotation to remove said solids, metals and inorganic compounds therefrom
A system for treatment of wastewater, as recited by claim 1, wherein said secondary treatment step further compπses the steps of
(i) contacting the wastewater with microorganisms in the presence of air to metabolize biodegradable compounds into carbon dioxide, water, new microorganisms and energy, and
(ii) treating said wastewater in a secondary clarifier or dissolved air flotation chamber to remove biological solids therefrom
A system for treatment of wastewater, as recited by claim 1 , wherein said tertiary treatment step further comprises the steps of
(i) contacting said wastewater with activated carbon to remove color and hard to remove organic material therefrom, and
(ii) subjecting said wastewater to a reverse osmosis system to remove chloride or total dissolved solids therefrom
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU57044/98A AU5704498A (en) | 1996-12-13 | 1997-12-12 | Closed-loop wastewater treatment system |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3289196P | 1996-12-13 | 1996-12-13 | |
| US60/032,891 | 1996-12-13 | ||
| US91139797A | 1997-08-14 | 1997-08-14 | |
| US08/911,397 | 1997-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998025858A1 true WO1998025858A1 (en) | 1998-06-18 |
Family
ID=26709022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1997/023230 WO1998025858A1 (en) | 1996-12-13 | 1997-12-12 | Closed-loop wastewater treatment system |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU5704498A (en) |
| WO (1) | WO1998025858A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0990622A2 (en) * | 1998-09-30 | 2000-04-05 | Bernd-Ulrich Wilk | Process and device for biological waste water purification |
| WO2001072645A1 (en) * | 2000-03-29 | 2001-10-04 | Steag Encotec Gmbh | Method and device for producing ultrapure water |
| WO2008089529A1 (en) * | 2007-01-22 | 2008-07-31 | Ramenzoni Lamberto Jose | Process and apparatus for reuse of liquid effluents generated in the textile finishing, laundering, dyeing and stamping process |
| CN104058498A (en) * | 2014-07-10 | 2014-09-24 | 上海埃格环保科技有限公司 | Water treatment method |
| CN105198043A (en) * | 2015-10-20 | 2015-12-30 | 江门市腾飞科技有限公司 | Water purification machine adjusting wastewater discharge through TDS (Total Dissolved Solids) detection value |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4073722A (en) * | 1973-09-28 | 1978-02-14 | Standard Oil Company (Indiana) | Process for the purification of waste water |
| US4172781A (en) * | 1977-06-15 | 1979-10-30 | Standard Oil Company (Indiana) | Waste water process for treatment of strong wastes |
| EP0104648A2 (en) * | 1982-09-29 | 1984-04-04 | Phillips Petroleum Company | Waste water treatment |
| US5106496A (en) * | 1988-04-27 | 1992-04-21 | Ciba-Geigy Corporation | Treatment of volatile organic substances at waste water treatment plants |
| WO1993022248A1 (en) * | 1992-05-04 | 1993-11-11 | Michel Goffin | Recycling industrial waste water |
| EP0683138A2 (en) * | 1994-05-18 | 1995-11-22 | Fuji Photo Film Co., Ltd. | Process for making photoprocessing waste solution harmless |
-
1997
- 1997-12-12 AU AU57044/98A patent/AU5704498A/en not_active Abandoned
- 1997-12-12 WO PCT/US1997/023230 patent/WO1998025858A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4073722A (en) * | 1973-09-28 | 1978-02-14 | Standard Oil Company (Indiana) | Process for the purification of waste water |
| US4172781A (en) * | 1977-06-15 | 1979-10-30 | Standard Oil Company (Indiana) | Waste water process for treatment of strong wastes |
| EP0104648A2 (en) * | 1982-09-29 | 1984-04-04 | Phillips Petroleum Company | Waste water treatment |
| US5106496A (en) * | 1988-04-27 | 1992-04-21 | Ciba-Geigy Corporation | Treatment of volatile organic substances at waste water treatment plants |
| WO1993022248A1 (en) * | 1992-05-04 | 1993-11-11 | Michel Goffin | Recycling industrial waste water |
| EP0683138A2 (en) * | 1994-05-18 | 1995-11-22 | Fuji Photo Film Co., Ltd. | Process for making photoprocessing waste solution harmless |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0990622A2 (en) * | 1998-09-30 | 2000-04-05 | Bernd-Ulrich Wilk | Process and device for biological waste water purification |
| EP0990622A3 (en) * | 1998-09-30 | 2000-12-06 | Bernd-Ulrich Wilk | Process and device for biological waste water purification |
| WO2001072645A1 (en) * | 2000-03-29 | 2001-10-04 | Steag Encotec Gmbh | Method and device for producing ultrapure water |
| WO2008089529A1 (en) * | 2007-01-22 | 2008-07-31 | Ramenzoni Lamberto Jose | Process and apparatus for reuse of liquid effluents generated in the textile finishing, laundering, dyeing and stamping process |
| CN104058498A (en) * | 2014-07-10 | 2014-09-24 | 上海埃格环保科技有限公司 | Water treatment method |
| CN104058498B (en) * | 2014-07-10 | 2015-12-30 | 上海埃格环保科技有限公司 | A kind of water treatment method |
| CN105198043A (en) * | 2015-10-20 | 2015-12-30 | 江门市腾飞科技有限公司 | Water purification machine adjusting wastewater discharge through TDS (Total Dissolved Solids) detection value |
Also Published As
| Publication number | Publication date |
|---|---|
| AU5704498A (en) | 1998-07-03 |
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