WO2022045948A1 - A purification device for a three-chamber well - Google Patents

A purification device for a three-chamber well Download PDF

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Publication number
WO2022045948A1
WO2022045948A1 PCT/SE2021/050820 SE2021050820W WO2022045948A1 WO 2022045948 A1 WO2022045948 A1 WO 2022045948A1 SE 2021050820 W SE2021050820 W SE 2021050820W WO 2022045948 A1 WO2022045948 A1 WO 2022045948A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
purification device
air
perforated layer
flow control
Prior art date
Application number
PCT/SE2021/050820
Other languages
French (fr)
Inventor
Anders NIKLASSON
Original Assignee
Maxgrepp Handrims Ab
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 Maxgrepp Handrims Ab filed Critical Maxgrepp Handrims Ab
Priority to EP21862194.4A priority Critical patent/EP4200258A1/en
Publication of WO2022045948A1 publication Critical patent/WO2022045948A1/en

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Classifications

    • 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
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1242—Small compact installations for use in homes, apartment blocks, hotels or the like
    • C02F3/1247—Small compact installations for use in homes, apartment blocks, hotels or the like comprising circular tanks with elements, e.g. decanters, aeration basins, in the form of segments, crowns or sectors
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
    • 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
    • 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
    • C02F3/06—Aerobic processes using submerged filters
    • 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
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • C02F1/505—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment by oligodynamic treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • 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
    • C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
    • 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
    • C02F2103/005—Black water originating from toilets
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • 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

Definitions

  • the present invention relates to a purification device to be used in a well.
  • the three-chamber well is a construction solution used to separate sedimenting material from closet water and bath, dish and wash water from households that lack coupling to municipal drainage (individual drainage facilities).
  • the three-chamber well does not purify the effluent of pollutants that are discharged in the water, possible residues of detergent etc. come with the water. From the three- chamber well the water normally flows further on to a stone casket or an infiltration facility for so-called drainage infiltration. Other types of purification include compact filters, ground beds or mini-purification works.
  • a purification device for use in a well comprises, when in use, a horizontally encompassing casing, forming a tube.
  • This tube has at one end a connection for air supply, wherein at least one air stone is arranged inside the tube in connection with the air supply.
  • a portion with copper is arranged above the air stones and further flow control elements are arranged above the copper portion.
  • a perforated layer is arranged above the flow control elements, and the space above the perforated layer is adapted to hold lime.
  • the water to be purified is oxygenated by for example an air pump that presses air through a tube or a hose to one or more air stones at the bottom of the device.
  • the copper portion further contributes to killing the bacteria.
  • the air is directed via the flow control elements further towards a perforated layer above which lime/well lime constitute a phosphorus trap by binding phosphorus.
  • the coli bacteria are killed by means of oxygen and copper. Through the oxygenation of the drainage, the biological oxygen consumption is reduced in the outgoing effluent.
  • the oxygenation of the sludge separator in a three-chamber well means that there is no sludge, everything is dissolved.
  • the tube preferably has a circular cross section to simplify the manufacturing of the purification device.
  • the flow control element comprises at least one plane portion that extends along the tube through the centre of the tube and out to the tube casing. As indicated by the term, the flow control element help control the flow, so that the oxygen is distributed more evenly in the lime.
  • a space is formed between the portion with copper and the perforated layer that is arranged above the flow control elements. At least a part of this space is provided with the flow control elements.
  • the flow control elements extend along at least 25% of the length of the tube, preferably along at least 35% of the length of the tube. In this manner, a space is formed between the portion with copper and the perforated layer that is arranged above the flow control elements.
  • the flow resistance through the tube in this embodiment is lower at the lower end of the tube than at the upper end, in order to allow the air to be supplied via the air stone to create a flow through the purification device, which increases the purification efficiency.
  • secondary purification components are arranged in the space formed between the portion with copper and the perforated layer that is arranged above the flow control elements.
  • These secondary purification components are for example LIV lamps arranged to irradiate and thereby purify a liquid flowing through the space.
  • the air stones are arranged entirely inside the tube in connection with the air supply. In other words, a part of the air stone does not project out on the bottom side of the tube, which would reduce the flow through the air stone created through the tube by the air supply.
  • the perforated layer is preferably the bottom of a perforated container for lime arranged at the top of the purification device.
  • the space adapted to hold lime does not extend lower than to the middle of the tube.
  • the perforated container has an opening in the upper side. Through this lime is filled in when required.
  • the device further comprises an air tube with an end coupled to the connection, wherein the air tube is arranged to extend along the tube and further up above the tube for connection to an air pump.
  • the tube or the hose may for the sake of simplicity be arranged on the outside of the tube.
  • the purification device preferably comprises a second perforated layer arranged under said perforated layer.
  • the portion with copper according to the present invention is preferably a perforated layer.
  • This perforated layer is thus the first element that distributes the air/oxygen that is pumped into the device.
  • Fig. 1a is a side view of a purification device in cross section according to the present invention
  • Fig. 1b is a side view of a purification device in cross section according to an embodiment of the present invention
  • Fig. 2 is a side view of a purification device in cross section arranged in a three- chamber well
  • Fig. 3 is a top view of the purification device in the three-chamber well from Fig. 2.
  • a purification device 1 for use in a well 2, comprising, in use, a horizontally encompassing elongated casing, forming a tube 3.
  • the tube 3 has at one end 4 a connection 5 for air supply, wherein air stones 6 are arranged inside the tube 3 in connection with the air supply.
  • a portion 7 with copper, preferably a perforated copper disc, is arranged above the air stones 6. Oxygenation together with the copper portion 7 eliminates or substantially reduces the content of coli bacteria.
  • Flow control elements 8 or ’’wings” are arranged above the copper portion 7 to distribute the flow towards the perforated layer 9, which is arranged above the flow control element 8.
  • lime 13 is added to act as phosphorous trap.
  • Lime 13 is suitably added via a funnel-like device 20 in the upper part of the purification device 1 .
  • a perforated layer 17 is arranged between said perforated layer 9 and the flow control element 8 to improve the distribution of the air/oxygen to a wider extent.
  • Fig. 2 also shows lines/chains 18 schematically, in which the purification device 1 is suspended.
  • these lines/chains may be attached to a well lid 19.
  • the purification device 1 is thus lifted up, at least sufficiently for the funnel-like device 20 to come above the water surface 16.
  • the tube 3 has a circular cross section. In terms of manufacturing, this is advantageous, but it is of course possible to configure the tube with for instance a square cross section or any other shape.
  • the flow control element 8 comprises two crossed plane portions that extend along the tube 3 through the centre of the tube and out to the tube casing.
  • Two crossed plates with cuts of half the length are simple to manufacture and stabilize each other without further mounting being required.
  • the perforated layer 9 is the bottom of a perforated container for lime 13 arranged at the top of the purification device 1 .
  • the perforated layer 9 has an opening 10 in the top side, see Fig. 2.
  • Figs 2 and 3 schematically show that the device further comprises an air tube 11 with an end coupled to the connection 5, wherein the air tube 11 is arranged along the tube 3 and further up above the tube 3 for connection to an air pump 12.
  • Figs 2 and 3 show how the purification device 1 according to the present invention is arranged in a three-chamber well 2 with incoming drainage 14 and outgoing pure water 15 (and the liquid level 16).
  • the present invention has a purification device 1 , which in principle does not require any maintenance except filling of lime 13 and electricity to operate the air pump 12.
  • Fig. 1b shows an embodiment, in which secondary purification components 21 are arranged in the space formed between the portion 7 with copper and the perforated layer 9 that is arranged above the flow control elements 8.
  • these secondary purification components 21 are LIV lamps arranged to irradiate and thereby purify a liquid flowing through the space.
  • the secondary purification components 21 are attached to the flow control elements 8.
  • the air tube 11 can be a flexible hose instead of a tube in a less flexible material.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Inorganic Chemistry (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Physical Water Treatments (AREA)

Abstract

A purification device (1) for use in a well (2), comprising, in use, a horizontally encompassing elongated casing, forming a tube (3), which tube (3) at one end (4) has a connection (5) for air supply, wherein at least one air stone (6) is arranged inside the tube (3) in connection with the air supply. A portion (7) with copper is arranged above the air stone (6), wherein flow control elements (8) are arranged above the copper portion (7). A perforated layer (9) is arranged above the flow control elements (8), wherein the space above the perforated layer (9) is adapted to hold lime 13).

Description

A purification device for a three-chamber well
TECHNICAL FIELD
The present invention relates to a purification device to be used in a well.
TECHNICAL BACKGROUND
Today, there is a variety of ways to purify water. The three-chamber well is a construction solution used to separate sedimenting material from closet water and bath, dish and wash water from households that lack coupling to municipal drainage (individual drainage facilities).
The three-chamber well does not purify the effluent of pollutants that are discharged in the water, possible residues of detergent etc. come with the water. From the three- chamber well the water normally flows further on to a stone casket or an infiltration facility for so-called drainage infiltration. Other types of purification include compact filters, ground beds or mini-purification works.
Purification of phosphorus and nitrogen is inferior in older purification facilities. Therefore, individual drainage accounts for a disproportionately large share of household contribution to the overfertilization of lakes and watercourses. Particularly in stone caskets, the water flows quickly down to the ground water without being purified. Thus, there is a risk that drinking water wells are polluted by effluent.
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide a water purification device that can be used in existing three-chamber wells or other wells for purifying the water.
This object is achieved by a purification device according to the subsequent claims. According to a first aspect of the present invention, a purification device for use in a well comprises, when in use, a horizontally encompassing casing, forming a tube. This tube has at one end a connection for air supply, wherein at least one air stone is arranged inside the tube in connection with the air supply. A portion with copper is arranged above the air stones and further flow control elements are arranged above the copper portion. A perforated layer is arranged above the flow control elements, and the space above the perforated layer is adapted to hold lime.
To improve primarily the purification of nitrogen and coli bacteria, the water to be purified is oxygenated by for example an air pump that presses air through a tube or a hose to one or more air stones at the bottom of the device. The copper portion further contributes to killing the bacteria. The air is directed via the flow control elements further towards a perforated layer above which lime/well lime constitute a phosphorus trap by binding phosphorus.
The coli bacteria are killed by means of oxygen and copper. Through the oxygenation of the drainage, the biological oxygen consumption is reduced in the outgoing effluent. The oxygenation of the sludge separator in a three-chamber well means that there is no sludge, everything is dissolved.
The tube preferably has a circular cross section to simplify the manufacturing of the purification device.
In the following, the relating drawings should be understood on the basis of the intended orientation of use of the product, with the air stones arranged at the bottom and the space adapted to hold lime in the upper part.
According to a second aspect of the present invention, the flow control element comprises at least one plane portion that extends along the tube through the centre of the tube and out to the tube casing. As indicated by the term, the flow control element help control the flow, so that the oxygen is distributed more evenly in the lime.
According to an embodiment, a space is formed between the portion with copper and the perforated layer that is arranged above the flow control elements. At least a part of this space is provided with the flow control elements. According to an embodiment, the flow control elements extend along at least 25% of the length of the tube, preferably along at least 35% of the length of the tube. In this manner, a space is formed between the portion with copper and the perforated layer that is arranged above the flow control elements. The flow resistance through the tube in this embodiment is lower at the lower end of the tube than at the upper end, in order to allow the air to be supplied via the air stone to create a flow through the purification device, which increases the purification efficiency.
According to an embodiment, secondary purification components are arranged in the space formed between the portion with copper and the perforated layer that is arranged above the flow control elements. These secondary purification components are for example LIV lamps arranged to irradiate and thereby purify a liquid flowing through the space.
According to an embodiment, the air stones are arranged entirely inside the tube in connection with the air supply. In other words, a part of the air stone does not project out on the bottom side of the tube, which would reduce the flow through the air stone created through the tube by the air supply.
The perforated layer is preferably the bottom of a perforated container for lime arranged at the top of the purification device.
According to an embodiment, the space adapted to hold lime does not extend lower than to the middle of the tube.
According to a preferred embodiment of the present invention, the perforated container has an opening in the upper side. Through this lime is filled in when required.
According to yet another variant of the present invention, the device further comprises an air tube with an end coupled to the connection, wherein the air tube is arranged to extend along the tube and further up above the tube for connection to an air pump. The tube or the hose may for the sake of simplicity be arranged on the outside of the tube. Through a large oxygenation of between 30,000 and 100,000 litres of air supplied to the drainage per 24 hours, the purification primarily of nitrogen and coli bacteria is improved, and at the same time the biological oxygen consumption in the outgoing effluent is reduced. The large circulation of the drainage results in the purification device being able to capture phosphorus in the phosphorus trap and thus improve the biological purification of phosphorus.
In order to distribute the air oxygen even better, the purification device according to the present invention, preferably comprises a second perforated layer arranged under said perforated layer.
Moreover, the portion with copper according to the present invention, is preferably a perforated layer. This perforated layer is thus the first element that distributes the air/oxygen that is pumped into the device.
Further characteristics and advantages of the present invention appear from the following claims and associated description. The skilled person will realize that different parts of the present invention can be combined in other ways in addition to the description to form embodiments that differ from those described in the following without deviating from the scope of protection as defined by the claims.
BRIEF DESCRIPTION OF FIGURES
The above-mentioned and further details as well as advantages of the present invention will be more easily understood in the continued description of examples of embodiments of the present invention with reference to the figures, in which:
Fig. 1a is a side view of a purification device in cross section according to the present invention,
Fig. 1b is a side view of a purification device in cross section according to an embodiment of the present invention
Fig. 2 is a side view of a purification device in cross section arranged in a three- chamber well, and Fig. 3 is a top view of the purification device in the three-chamber well from Fig. 2.
DESCRIPTION OF EXEMPLARY EMBODIMENTS ACCORDING TO THE INVENTION
In the following, the invention will be described in more detail with reference to the associated figures, in which exemplary embodiments are shown. However, the invention can be configured in many different ways and should not be seen as limited to the examples shown. The same reference numeral refers to the same or similar parts of the invention throughout the description.
With reference to the embodiment in Fig. 1a and Fig. 2, a purification device 1 is shown for use in a well 2, comprising, in use, a horizontally encompassing elongated casing, forming a tube 3. The tube 3 has at one end 4 a connection 5 for air supply, wherein air stones 6 are arranged inside the tube 3 in connection with the air supply. A portion 7 with copper, preferably a perforated copper disc, is arranged above the air stones 6. Oxygenation together with the copper portion 7 eliminates or substantially reduces the content of coli bacteria.
Flow control elements 8 or ’’wings” are arranged above the copper portion 7 to distribute the flow towards the perforated layer 9, which is arranged above the flow control element 8. In the space above the perforated layer 9, lime 13 is added to act as phosphorous trap. Lime 13 is suitably added via a funnel-like device 20 in the upper part of the purification device 1 .
Furthermore, a perforated layer 17 is arranged between said perforated layer 9 and the flow control element 8 to improve the distribution of the air/oxygen to a wider extent.
Fig. 2 also shows lines/chains 18 schematically, in which the purification device 1 is suspended. For example, as shown in Fig. 2, these lines/chains may be attached to a well lid 19. When filling in lime 13, the purification device 1 is thus lifted up, at least sufficiently for the funnel-like device 20 to come above the water surface 16. As appears from Fig. 3, the tube 3 has a circular cross section. In terms of manufacturing, this is advantageous, but it is of course possible to configure the tube with for instance a square cross section or any other shape.
The flow control element 8 comprises two crossed plane portions that extend along the tube 3 through the centre of the tube and out to the tube casing. Here there are also a variety of different possibilities of controlling the flow with different solutions for the flow control element 8. Two crossed plates with cuts of half the length are simple to manufacture and stabilize each other without further mounting being required.
In the shown embodiment, the perforated layer 9 is the bottom of a perforated container for lime 13 arranged at the top of the purification device 1 . In order to be able to fill lime/well lime in the container 9, it has an opening 10 in the top side, see Fig. 2.
Figs 2 and 3 schematically show that the device further comprises an air tube 11 with an end coupled to the connection 5, wherein the air tube 11 is arranged along the tube 3 and further up above the tube 3 for connection to an air pump 12.
Furthermore, Figs 2 and 3 show how the purification device 1 according to the present invention is arranged in a three-chamber well 2 with incoming drainage 14 and outgoing pure water 15 (and the liquid level 16).
The present invention has a purification device 1 , which in principle does not require any maintenance except filling of lime 13 and electricity to operate the air pump 12.
Fig. 1b shows an embodiment, in which secondary purification components 21 are arranged in the space formed between the portion 7 with copper and the perforated layer 9 that is arranged above the flow control elements 8. In the illustrated embodiment, these secondary purification components 21 are LIV lamps arranged to irradiate and thereby purify a liquid flowing through the space. The secondary purification components 21 are attached to the flow control elements 8.
The present invention is not limited to the embodiments described above and shown in the figures. The skilled person will realize that many variants and modifications can be made within the scope of protection defined by the following claims. For example, the air tube 11 can be a flexible hose instead of a tube in a less flexible material.

Claims

8 CLAIMS
1 . A purification device (1 ) for use in a well (2), comprising, in use, a horizontally encompassing elongated casing, forming a tube (3), which tube (3) at one end (4) has a connection (5) for air supply, wherein at least one air stone (6) is arranged inside the tube (3) in connection with the air supply, wherein a portion (7) with copper is arranged above the air stones (6), wherein flow control elements (8) are arranged above the copper portion (7), wherein a perforated layer (9) is arranged above the flow control elements (8), wherein the space above the perforated layer (9) is adapted to hold lime (13).
2. A purification device (1 ) according to claim 1 , wherein the tube (3) has a circular cross section.
3. A purification device (1 ) according to any one of the preceding claims, wherein the flow control element (8) comprises at least one plane portion that extends along the tube (3) through the centre of the tube and out to the tube casing.
4. A purification device (1 ) according to any one of the preceding claims, wherein the perforated layer (9) is the bottom of a perforated container for lime (13) arranged at the top of the purification device (1 ).
5. A purification device (1 ) according to claim 4, wherein the perforated container (9) has an opening (10) in the upper side.
6. A purification device (1 ) according to any one of the preceding claims, wherein the device further comprises an air tube (11 ) with an end coupled to the connection (5), wherein the air tube (11 ) is arranged to extend along the tube (3) and further up above the tube (3) for connection to an air pump (12).
7. A purification device (1 ) according to any one of the preceding claims, further comprising a second perforated layer (17) arranged below said perforated layer (9).
8. A purification device (1 ) according to any one of the preceding claims, wherein the portion (7) with copper is a perforated layer.
PCT/SE2021/050820 2020-08-24 2021-08-24 A purification device for a three-chamber well WO2022045948A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21862194.4A EP4200258A1 (en) 2020-08-24 2021-08-24 A purification device for a three-chamber well

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE2050976-6 2020-08-24
SE2050976A SE544179C2 (en) 2020-08-24 2020-08-24 Purification device for three-chamber well

Publications (1)

Publication Number Publication Date
WO2022045948A1 true WO2022045948A1 (en) 2022-03-03

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SE (1) SE544179C2 (en)
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT107U1 (en) * 1990-05-08 1995-02-27 Envicon Klaertech Verwalt SMALL WASTEWATER PLANT
SE1150131A1 (en) * 2011-02-17 2012-08-18 Maxgrepp Teknik Ab Method and apparatus for biological purification of sewage in a sludge separator

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Publication number Priority date Publication date Assignee Title
DE4425123A1 (en) * 1994-07-15 1994-12-15 Manfred Reinhardt Small sewage treatment plant package unit
BE1014104A6 (en) * 2001-07-06 2003-04-01 Water treatment tank.
FI119730B (en) * 2007-06-27 2009-02-27 Konva Ct Oy Ab Process for removing nitrogen and other undesirable components from waste water and apparatus for use in the process
WO2010140968A1 (en) * 2009-06-05 2010-12-09 Kenrex Envirotech Use of a composition for conditioning wastewater, and system, material and method for recycling wastewater components
CN110741899B (en) * 2019-10-22 2021-04-13 云南省农业科学院农业环境资源研究所 Slope farmland construction method for capturing cyclic utilization of nitrogen and phosphorus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT107U1 (en) * 1990-05-08 1995-02-27 Envicon Klaertech Verwalt SMALL WASTEWATER PLANT
SE1150131A1 (en) * 2011-02-17 2012-08-18 Maxgrepp Teknik Ab Method and apparatus for biological purification of sewage in a sludge separator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KLARA SINNERSTAD: "Karl-Erik vill statuera exempel med ny reningsteknik", 19 August 2019 (2019-08-19), pages 1 - 4, XP055909171, Retrieved from the Internet <URL:https://www.entreprenadaktuellt.se/artikel/48076/karl-erik-vill-statuera-exempel--med-ny-reningsteknik.html> *

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EP4200258A1 (en) 2023-06-28
SE2050976A1 (en) 2022-02-22
SE544179C2 (en) 2022-02-22

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