CA1074928A - Water treatment system - Google Patents
Water treatment systemInfo
- Publication number
- CA1074928A CA1074928A CA250,434A CA250434A CA1074928A CA 1074928 A CA1074928 A CA 1074928A CA 250434 A CA250434 A CA 250434A CA 1074928 A CA1074928 A CA 1074928A
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- Canada
- Prior art keywords
- water
- tank means
- settling tank
- settling
- treatment plant
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Abstract
IMPROVED WATER TREATMENT SYSTEM
ABSTRACT OF THE DISCLOSURE
A package water treatment plant for producing drinkable water from impure water including coagulation chambers arranged co receive impure water and mix same with coagulant materials to produce floc, a primary settling tank for receiving water from the coagulation chambers, a secondary settling tank for receiving water from the primary settling tank having a plurality of inclined chevron cross-sectional settling tubes, a tertiary settling tank for receiving water from the secondary settling tank having particulate filter material for catching particles and a storage tank for receiving water from the tertiary settling tank including a connection to permit a bacteria killing supply to be dispersed within the storage tank. Additionally, V-shaped bottom surfaces arranged on the primary and secondary settling tanks provide a greater surface for settling of floc.
ABSTRACT OF THE DISCLOSURE
A package water treatment plant for producing drinkable water from impure water including coagulation chambers arranged co receive impure water and mix same with coagulant materials to produce floc, a primary settling tank for receiving water from the coagulation chambers, a secondary settling tank for receiving water from the primary settling tank having a plurality of inclined chevron cross-sectional settling tubes, a tertiary settling tank for receiving water from the secondary settling tank having particulate filter material for catching particles and a storage tank for receiving water from the tertiary settling tank including a connection to permit a bacteria killing supply to be dispersed within the storage tank. Additionally, V-shaped bottom surfaces arranged on the primary and secondary settling tanks provide a greater surface for settling of floc.
Description
~0749z19 BACKGROUND OF r~E INVENTION
A Field of the Invention The present invention relates to water treatment, and more particularly to an improved package water treatment plant used to produce drinkable water from impure water.
A package water treatment plant is appropriate for use in small community water systems, resort areas or construction and lumber camps located in remote areas. A package water treatment plant which is easily maintained and operated by unskilled individuals is preferable over larger more complex systems requiring continuous maintenance and supervision. In particular, there is a definite need for package-type water treatment plants which can accommodate flows from about 300 to 6000 gallons per hour and can operate on a continuous daily basis. The size of a package water treatment plant is important, and it is desirable to provide a plant which may be readily moved from one area to another depending upon needs.
While prior art water treatment plants have been proposed, the present invention contemplates an improved package water treatment plant for producing drinkable water from impure water in which the plant is constructed of generally rectangular configuration and includes a plurality of coagulation chambers for receiving impure water and mixing same with coagulant chemi-cals in order to generate floc to be transported to a primary settling tank. The primary settling tank is the first step of a two-step sedimentation process. Sludge forms on a bottom V-shaped surface of the primary settling tank and the water is transported upwardly over a boundary wall to a secondary settling tank. The secondary settling tank incorporates a plurality of inclined settling tubes coextensively arranged, each having a generally chevron-shaped cross section to expedite the settling of floc downwardly to a V-shaped bottom surface in the secondary settling ~07~928 tank. After passing upwardly through the inclined settling tubes, the water is then transported to a tertiary settling tank which incorporates a sand and gravel filter. After passing downwardly through the filter, the clarified water is discharged through an underdrain assembly into a storage tank where a bacteria killing supply may be added thereto for a predetermined time interval. The water is then available for drinking purposes.
B Descri tion of the Prior Art P
A package water treatment plant is disclosed in Cana-dian Patent 692,543. The water treatment plant includes a cylindrical shell disposed within a semicircular settling tank.
The cylindrical shell incorporates a plurality of coagulation chambers arranged in continuous communication for eventual discharge of influent impure water into the settling tank. The settling tank discharges water therefrom into a filter which uses sand as the filtering media. After passing through the sand filter, the water is then transported to a storage tank.
The water treatment plant disclosed in this patent does not employ tube settlers nor utilize V-shaped bottoms in the sedimen-: 20 tation regions.
In U.S. Patent 3,768,648, there is disclosed an im-proved settler assembly which utilizes a plurality of inclined passages of chevron cross-sectional configuration. The chevron configuration provides a higher critical flow rate than passages having square, circular, hexagonal and the like cross-sectional configurations. While the tube settlers of this patent are described as being used for separating suspended material from a fluid stream, use is not indicated in a package-type water treatment plant.
SUMMARY OF THE INVENTION
The package water treatment plant of the present invention provides a unit for producing drinkable water from iO7~92~3 impure water. Specifically, the present invention incorporates a plurality of coagulation chambers in communication with a pr mary settling tank which in turn is in communication with a secondary settling tank. The secondary settling tank incorpor-ates a plurality of inclined coextensively arranged chevron cross-sectional settling tubes which greatly increase the rate of sedimentation of the impure water for subsequent delivery to a third settling tank. The third settling tank incorporates a typical sand filter for removing or catching particles before the water is channeled into a storage tank. The storage tank is arranged to permit a bacteria killing source to be discharged into the stored water.
A primary object of the present invention is to provide hydraulic turbulence, designed into the fluid transport system, such as to impart to the water the agitation necessary for complete mixing, rapid growth of floc and rapid settling of a floc blanket. The major proportion of floculated material is removed initiall~v in the sedimentation stage and the residue deposited on generously sized settling surfaces where it is ~0 removed during backwash. After filtration through a sand filter, the water may be chlorinated and held for a sufficient time before becoming available for consumption.
An object of the present invention is to provide a package water treatment plant in which both the primary and secondary settling tanks have generally V-shaped bottoms in order to provide for better sludge removal. A V-shaped bottom will give better sludge removal from a manifold in the bottom of the tank.
Another object of the present invention is to incorpor-ate chevron cross-sectional tube settlers in a secondary settling tank in order to increase the rate of sedimentation in the tank.
A further object of the present invention is to provide ~07~2~3 a package water or sewage treatment plant which utilizes generally rectangular compartments in the coagulation chambers, settling tanks, etc. A generally rectangular configuration increases detention time for a plant of a given length and width.
Still another object of the present invention is to provide a package water treatment plant which is designed to accommodate the ready attachment thereto of a horizontally arranged catwalk or the like for maintenance or observation purposes.
Additional objects of the present invention reside in the specific construction of the exemplary apparatus hereinafter particularly described in the specification and shown in the several drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Novel features of the improved water treatment plant in accordance with the present invention will be more readily under-stood from a consideration of the following description taken together with the accompanying drawing, in which a preferred adaptation is illustrated with the various parts thereof identi-fied by suitable reference characters in each of the views, andin which:
FIG. 1 is a perspective view of the water treatment plant illustrating the use of a catwalk attached thereto;
FIG. 2 is a side view of the water treatment plant shown schematically; and FIG. 3 is a cross-sectional view of the tube settlers shown in FIGS. 1 and 3.
, .
107~l9Z~
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS. 1 and 2, a package water treatment plant of the present invention is generally designated at 10.
Components of the package water treatment plant 10 will be described preceding a particular description of an actual treat-ment process using the principles of the present invention.
Package water treatment plant 10 is generally rectangu-lar and consists of side walls 12, 14 and front and rear walls 16, 18. The walls are joined in a manner such as to define a generally rectangular box. A mixing chamber 20 is arranged to cooperate with coagulation chambers 22, 22_, 22b and 22c.
Refillable or portable chemical tanks 24, 24_ and 24b are arran-ged to supply chemical coagulants to mixing chamber 20 via appropriately arranged transporting hoses 17, 17a and 17b which are connected from chemical tanks 24, 24a and 24b through pumps 25, 25a and 25b to manifold 26. A primary settling tank 28 is disposed between a primary settler wier or launder 30 and wall 23 of the coagulation chambers. A plurality of inclined chevron cross-sectional settling tubes are generally indicated at 32 and are disposed in an upper portion of secondary settling tank 33.
A sand filter 35 is arranged in compartment 34 directly preceding a backwash storage and chlorinated water reservoir 36. A sewage treatment plant will have the general configuration as shown in the drawings while a water treatment plant will have a reservoir 36 as represented by the dot-dash lines 36a. A service outlet is indicated at 16_.
A chlorine tank 38 is operatively connected to a pump 40 in order to pump chlorine into reservoir 36. Additional structural features of the present invention reside in the use of ~07 ~9 Z ~
a backwash pump 42 which is connected via pipes 44 and 46 to storage reservoir 36 and filter chamber 34, respectively.
Automatic valves 45 and 45_ and a filter valve 43 are arranged for a typical backwash operation. A backwash drain is indicated at 50 and a desludge auto valve is indicated at 52.
An additional feature of the present invention resides in the attachment of a catwalk 54 which is secured to the unit at one side thereof and incorporates a stairwell 56 for access thereto. Catwalk 54 may employ a typical user supporting struc-ture comprising a grate 54a.
OPERATION OF THE PACKAGE UNIT
With reference directed particularly to FIG. 2 of thedrawings J the operation of the package unit 10 of the present invention will be more particularly described. The unit 10 is designed to produce drinkable water from impure water and treat sewage by removing sediment, color J bacteria and turbidity.
InitiallyJ raw water is introduced into mixing chamber 20 through an appropriate influent water pipe 21 or the like. Chemical coagulants are introduced through manifold 26 into mixing chamber 20 and the coagulants and water are chemically mixed due to the turbulent action of the water and chemicals. The mixture passes downwardly through mixing chamber 20 and into a upflow pipe 19 for eventual dispersion into coagulation chamber 22. Subsequently, the mixture passes into chambers 22aJ 22b and 22c in a similar manner following generally the directions indicated by arrows A.
It has been found that an appropriate residence time in each chamber should be approximately 5 minutes. Pipes 19J l9a, l9b and l9c are sized to regulate the intensity of the turbulence which instigates and provides the mixing. The coagulant chemi-cals form a floc which aids in the removal of colloidal and suspended matter along with color, and phosphates and bacteria in .
the sewage treatment units. Additionally, the chemical coagulants ~,o7~9Z8 also lower the pH of the water and a neutralizing agent may be added as required in order to bring the mixture to a proper pH
for effective floc formation.
The next step involves the mixture being channeled from coagulation chamber 22c through an opening 27 into primary settling tank 28. Primary settling tank 28 is essentially an up-flow clarifier which incorporates a generally V-shaped bottom having sides 28a and 28b. The inclined settling surfaces allow desludging from a single area while giving increased surface for the light floculated solids to settle on. Thus, it may be appreciated that the residence time necessary to separate effi-ciently the floc from the water is substantially decreased.
Closely spaced side walls found in tube settlers are eliminated in the primary settling tank 28. Desludging of primary settling tank 28 occurs on a periodic basis by opening a valve at port 52 attached to a perforated manifold on the bottom of this chamber.
After the water has risen in primary settling tank 28 in the direction of arrows B, the water flows over a launder 30 or wier into a secondary settling tank 33. Secondary settling tank 33 also incorporates a generally V-shaped bottom having sides 33a and 33b. The water flows upwardly in the direction of arrows C
through a plurality of tube settlers 32 which are inclined and arranged coextensively and further incorporate a chevron cross-sectional configuration. As shown in FIG. 3, tube settlers 43 are joined to form a plurality of connected passages, each indi-vidual passage 32 having side walls 32b and chevron cross-sectional walls 32c. The water then passes upwardly over another wier 34a, and is dumped downwardly into a third settling tank or filter 34 having a sand filter 34b.
After the water passes downwardly through sand filter 34b in the direction of arrows D and an underdrain assembly 35 (conveniently T-shaped), the water is discharged into the back-~o7~9Z8 wash storage and chlorinated water reservoir 36. Chlorine may be added to the water in reservoir 36 by means of chlorine pump 40.
Chlorine is applied to kill bacteria, most types of viruses and to prevent the growth of slimes and algae. Reservoir 36 is sized to maintain sufficient volume for backwash of filter 34b on demand.
The desludging process takes place as follows. Desludg-ing of chambers 33 and 34 occurs simultaneously. Backwash pump 42 pumps water from chamber 36 upwardly through sand filter 34b thereby transporting solids over the top of weir 34a into chamber 33. This flow also removes sludge from the tube settlers 32, the flow continuing to the bottom of chamber 33 whereupon it enters a perforated manifold (not shown) for exit through port 50. Sludge from the region around the perforated manifold is also removed.
While the invention has been particularly shown and described with reference to the foregoing preferred embodiment, it will be understood by those skilled in the art that other changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined in the 2Q appended claims. For instance, the present invention could readily be used as a sewage or industrial treatment plant as well as a plant for producing drinkable water.
A Field of the Invention The present invention relates to water treatment, and more particularly to an improved package water treatment plant used to produce drinkable water from impure water.
A package water treatment plant is appropriate for use in small community water systems, resort areas or construction and lumber camps located in remote areas. A package water treatment plant which is easily maintained and operated by unskilled individuals is preferable over larger more complex systems requiring continuous maintenance and supervision. In particular, there is a definite need for package-type water treatment plants which can accommodate flows from about 300 to 6000 gallons per hour and can operate on a continuous daily basis. The size of a package water treatment plant is important, and it is desirable to provide a plant which may be readily moved from one area to another depending upon needs.
While prior art water treatment plants have been proposed, the present invention contemplates an improved package water treatment plant for producing drinkable water from impure water in which the plant is constructed of generally rectangular configuration and includes a plurality of coagulation chambers for receiving impure water and mixing same with coagulant chemi-cals in order to generate floc to be transported to a primary settling tank. The primary settling tank is the first step of a two-step sedimentation process. Sludge forms on a bottom V-shaped surface of the primary settling tank and the water is transported upwardly over a boundary wall to a secondary settling tank. The secondary settling tank incorporates a plurality of inclined settling tubes coextensively arranged, each having a generally chevron-shaped cross section to expedite the settling of floc downwardly to a V-shaped bottom surface in the secondary settling ~07~928 tank. After passing upwardly through the inclined settling tubes, the water is then transported to a tertiary settling tank which incorporates a sand and gravel filter. After passing downwardly through the filter, the clarified water is discharged through an underdrain assembly into a storage tank where a bacteria killing supply may be added thereto for a predetermined time interval. The water is then available for drinking purposes.
B Descri tion of the Prior Art P
A package water treatment plant is disclosed in Cana-dian Patent 692,543. The water treatment plant includes a cylindrical shell disposed within a semicircular settling tank.
The cylindrical shell incorporates a plurality of coagulation chambers arranged in continuous communication for eventual discharge of influent impure water into the settling tank. The settling tank discharges water therefrom into a filter which uses sand as the filtering media. After passing through the sand filter, the water is then transported to a storage tank.
The water treatment plant disclosed in this patent does not employ tube settlers nor utilize V-shaped bottoms in the sedimen-: 20 tation regions.
In U.S. Patent 3,768,648, there is disclosed an im-proved settler assembly which utilizes a plurality of inclined passages of chevron cross-sectional configuration. The chevron configuration provides a higher critical flow rate than passages having square, circular, hexagonal and the like cross-sectional configurations. While the tube settlers of this patent are described as being used for separating suspended material from a fluid stream, use is not indicated in a package-type water treatment plant.
SUMMARY OF THE INVENTION
The package water treatment plant of the present invention provides a unit for producing drinkable water from iO7~92~3 impure water. Specifically, the present invention incorporates a plurality of coagulation chambers in communication with a pr mary settling tank which in turn is in communication with a secondary settling tank. The secondary settling tank incorpor-ates a plurality of inclined coextensively arranged chevron cross-sectional settling tubes which greatly increase the rate of sedimentation of the impure water for subsequent delivery to a third settling tank. The third settling tank incorporates a typical sand filter for removing or catching particles before the water is channeled into a storage tank. The storage tank is arranged to permit a bacteria killing source to be discharged into the stored water.
A primary object of the present invention is to provide hydraulic turbulence, designed into the fluid transport system, such as to impart to the water the agitation necessary for complete mixing, rapid growth of floc and rapid settling of a floc blanket. The major proportion of floculated material is removed initiall~v in the sedimentation stage and the residue deposited on generously sized settling surfaces where it is ~0 removed during backwash. After filtration through a sand filter, the water may be chlorinated and held for a sufficient time before becoming available for consumption.
An object of the present invention is to provide a package water treatment plant in which both the primary and secondary settling tanks have generally V-shaped bottoms in order to provide for better sludge removal. A V-shaped bottom will give better sludge removal from a manifold in the bottom of the tank.
Another object of the present invention is to incorpor-ate chevron cross-sectional tube settlers in a secondary settling tank in order to increase the rate of sedimentation in the tank.
A further object of the present invention is to provide ~07~2~3 a package water or sewage treatment plant which utilizes generally rectangular compartments in the coagulation chambers, settling tanks, etc. A generally rectangular configuration increases detention time for a plant of a given length and width.
Still another object of the present invention is to provide a package water treatment plant which is designed to accommodate the ready attachment thereto of a horizontally arranged catwalk or the like for maintenance or observation purposes.
Additional objects of the present invention reside in the specific construction of the exemplary apparatus hereinafter particularly described in the specification and shown in the several drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Novel features of the improved water treatment plant in accordance with the present invention will be more readily under-stood from a consideration of the following description taken together with the accompanying drawing, in which a preferred adaptation is illustrated with the various parts thereof identi-fied by suitable reference characters in each of the views, andin which:
FIG. 1 is a perspective view of the water treatment plant illustrating the use of a catwalk attached thereto;
FIG. 2 is a side view of the water treatment plant shown schematically; and FIG. 3 is a cross-sectional view of the tube settlers shown in FIGS. 1 and 3.
, .
107~l9Z~
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS. 1 and 2, a package water treatment plant of the present invention is generally designated at 10.
Components of the package water treatment plant 10 will be described preceding a particular description of an actual treat-ment process using the principles of the present invention.
Package water treatment plant 10 is generally rectangu-lar and consists of side walls 12, 14 and front and rear walls 16, 18. The walls are joined in a manner such as to define a generally rectangular box. A mixing chamber 20 is arranged to cooperate with coagulation chambers 22, 22_, 22b and 22c.
Refillable or portable chemical tanks 24, 24_ and 24b are arran-ged to supply chemical coagulants to mixing chamber 20 via appropriately arranged transporting hoses 17, 17a and 17b which are connected from chemical tanks 24, 24a and 24b through pumps 25, 25a and 25b to manifold 26. A primary settling tank 28 is disposed between a primary settler wier or launder 30 and wall 23 of the coagulation chambers. A plurality of inclined chevron cross-sectional settling tubes are generally indicated at 32 and are disposed in an upper portion of secondary settling tank 33.
A sand filter 35 is arranged in compartment 34 directly preceding a backwash storage and chlorinated water reservoir 36. A sewage treatment plant will have the general configuration as shown in the drawings while a water treatment plant will have a reservoir 36 as represented by the dot-dash lines 36a. A service outlet is indicated at 16_.
A chlorine tank 38 is operatively connected to a pump 40 in order to pump chlorine into reservoir 36. Additional structural features of the present invention reside in the use of ~07 ~9 Z ~
a backwash pump 42 which is connected via pipes 44 and 46 to storage reservoir 36 and filter chamber 34, respectively.
Automatic valves 45 and 45_ and a filter valve 43 are arranged for a typical backwash operation. A backwash drain is indicated at 50 and a desludge auto valve is indicated at 52.
An additional feature of the present invention resides in the attachment of a catwalk 54 which is secured to the unit at one side thereof and incorporates a stairwell 56 for access thereto. Catwalk 54 may employ a typical user supporting struc-ture comprising a grate 54a.
OPERATION OF THE PACKAGE UNIT
With reference directed particularly to FIG. 2 of thedrawings J the operation of the package unit 10 of the present invention will be more particularly described. The unit 10 is designed to produce drinkable water from impure water and treat sewage by removing sediment, color J bacteria and turbidity.
InitiallyJ raw water is introduced into mixing chamber 20 through an appropriate influent water pipe 21 or the like. Chemical coagulants are introduced through manifold 26 into mixing chamber 20 and the coagulants and water are chemically mixed due to the turbulent action of the water and chemicals. The mixture passes downwardly through mixing chamber 20 and into a upflow pipe 19 for eventual dispersion into coagulation chamber 22. Subsequently, the mixture passes into chambers 22aJ 22b and 22c in a similar manner following generally the directions indicated by arrows A.
It has been found that an appropriate residence time in each chamber should be approximately 5 minutes. Pipes 19J l9a, l9b and l9c are sized to regulate the intensity of the turbulence which instigates and provides the mixing. The coagulant chemi-cals form a floc which aids in the removal of colloidal and suspended matter along with color, and phosphates and bacteria in .
the sewage treatment units. Additionally, the chemical coagulants ~,o7~9Z8 also lower the pH of the water and a neutralizing agent may be added as required in order to bring the mixture to a proper pH
for effective floc formation.
The next step involves the mixture being channeled from coagulation chamber 22c through an opening 27 into primary settling tank 28. Primary settling tank 28 is essentially an up-flow clarifier which incorporates a generally V-shaped bottom having sides 28a and 28b. The inclined settling surfaces allow desludging from a single area while giving increased surface for the light floculated solids to settle on. Thus, it may be appreciated that the residence time necessary to separate effi-ciently the floc from the water is substantially decreased.
Closely spaced side walls found in tube settlers are eliminated in the primary settling tank 28. Desludging of primary settling tank 28 occurs on a periodic basis by opening a valve at port 52 attached to a perforated manifold on the bottom of this chamber.
After the water has risen in primary settling tank 28 in the direction of arrows B, the water flows over a launder 30 or wier into a secondary settling tank 33. Secondary settling tank 33 also incorporates a generally V-shaped bottom having sides 33a and 33b. The water flows upwardly in the direction of arrows C
through a plurality of tube settlers 32 which are inclined and arranged coextensively and further incorporate a chevron cross-sectional configuration. As shown in FIG. 3, tube settlers 43 are joined to form a plurality of connected passages, each indi-vidual passage 32 having side walls 32b and chevron cross-sectional walls 32c. The water then passes upwardly over another wier 34a, and is dumped downwardly into a third settling tank or filter 34 having a sand filter 34b.
After the water passes downwardly through sand filter 34b in the direction of arrows D and an underdrain assembly 35 (conveniently T-shaped), the water is discharged into the back-~o7~9Z8 wash storage and chlorinated water reservoir 36. Chlorine may be added to the water in reservoir 36 by means of chlorine pump 40.
Chlorine is applied to kill bacteria, most types of viruses and to prevent the growth of slimes and algae. Reservoir 36 is sized to maintain sufficient volume for backwash of filter 34b on demand.
The desludging process takes place as follows. Desludg-ing of chambers 33 and 34 occurs simultaneously. Backwash pump 42 pumps water from chamber 36 upwardly through sand filter 34b thereby transporting solids over the top of weir 34a into chamber 33. This flow also removes sludge from the tube settlers 32, the flow continuing to the bottom of chamber 33 whereupon it enters a perforated manifold (not shown) for exit through port 50. Sludge from the region around the perforated manifold is also removed.
While the invention has been particularly shown and described with reference to the foregoing preferred embodiment, it will be understood by those skilled in the art that other changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined in the 2Q appended claims. For instance, the present invention could readily be used as a sewage or industrial treatment plant as well as a plant for producing drinkable water.
Claims (6)
1. A package water treatment plant for producing drinkable water from water having impurities suspended therein comprising:
a plurality of coagulation chambers for receiving said water and mixing same with coagulant chemicals to generate floc in said water;
primary settling tank means operatively arranged in communication with said coagulation chambers for receiving said water therefrom;
secondary settling tank means operatively arranged in communication with said primary settling tank means for receiving said water therefrom, said secondary tank means including a plurality of coextensively arranged inclined chevron cross-sectional settling tubes arranged to permit said water to pass therethrough;
tertiary settling tank means operatively arranged in communication with said secondary tank means for receiving said water therefrom including particulate filter material for catch-ing particles suspended in said water; and storage tank means operatively arranged to receive said water from said tertiary tank means and connected to a bacteria killing supply source, said storage tank means including a dispen-sing means for delivering drinkable water.
a plurality of coagulation chambers for receiving said water and mixing same with coagulant chemicals to generate floc in said water;
primary settling tank means operatively arranged in communication with said coagulation chambers for receiving said water therefrom;
secondary settling tank means operatively arranged in communication with said primary settling tank means for receiving said water therefrom, said secondary tank means including a plurality of coextensively arranged inclined chevron cross-sectional settling tubes arranged to permit said water to pass therethrough;
tertiary settling tank means operatively arranged in communication with said secondary tank means for receiving said water therefrom including particulate filter material for catch-ing particles suspended in said water; and storage tank means operatively arranged to receive said water from said tertiary tank means and connected to a bacteria killing supply source, said storage tank means including a dispen-sing means for delivering drinkable water.
2. A package water treatment plant as described in claim 1, wherein at least one of said settling tanks includes a generally V-shaped bottom.
3. A package water treatment plant as described in claim 2 having a generally rectangular outer periphery for increas-ing detention time.
9.
9.
4. In a package water treatment plant for producing drinkable water from impure water including a plurality of coagu-lation chambers for mixing introduced impure water with chemical coagulants, a primary settling tank means operatively arranged in communication with said coagulation chambers, a secondary settling tank means operatively arranged in communication with said primary settling tank means, a tertiary settling tank means operatively arranged in communication with said secondary tank means and a storage tank means operatively arranged to receive a flow of said water from said tertiary tank means, the improvement comprising:
chevron cross-sectional settling tubes coextensively arranged inclined within said secondary settling tank means for accommodat-ing settling of particulate matter from said water introduced into and expelled from said secondary settling tank means.
chevron cross-sectional settling tubes coextensively arranged inclined within said secondary settling tank means for accommodat-ing settling of particulate matter from said water introduced into and expelled from said secondary settling tank means.
5. An improved package water treatment plant as described in claim 4, wherein at least one of said settling tank means includes a generally V-shaped bottom.
6. An improved package water treatment plant as described in claim 5 having a generally rectangular outer peri-phery for increasing detention time.
10.
10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA250,434A CA1074928A (en) | 1976-04-15 | 1976-04-15 | Water treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA250,434A CA1074928A (en) | 1976-04-15 | 1976-04-15 | Water treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1074928A true CA1074928A (en) | 1980-04-01 |
Family
ID=4105726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA250,434A Expired CA1074928A (en) | 1976-04-15 | 1976-04-15 | Water treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1074928A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4626357A (en) * | 1985-01-10 | 1986-12-02 | American Pollution Controls, Inc. | Waste water control method and means |
-
1976
- 1976-04-15 CA CA250,434A patent/CA1074928A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4626357A (en) * | 1985-01-10 | 1986-12-02 | American Pollution Controls, Inc. | Waste water control method and means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |