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WO1993023339A1 - Procede et appareil concernant le traitement des eaux usees - Google Patents

Procede et appareil concernant le traitement des eaux usees Download PDF

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Publication number
WO1993023339A1
WO1993023339A1 PCT/CA1993/000199 CA9300199W WO9323339A1 WO 1993023339 A1 WO1993023339 A1 WO 1993023339A1 CA 9300199 W CA9300199 W CA 9300199W WO 9323339 A1 WO9323339 A1 WO 9323339A1
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WO
WIPO (PCT)
Prior art keywords
wastewater
water
containment volume
air
volume
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CA1993/000199
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English (en)
Inventor
Michaye L. Mcmaster
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO1993023339A1 publication Critical patent/WO1993023339A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2866—Particular arrangements for anaerobic reactors
    • C02F3/288—Particular arrangements for anaerobic reactors comprising septic tanks combined with a filter
    • 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
    • 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
    • C02F3/04—Aerobic processes using trickle filters
    • 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
    • C02F3/10—Packings; Fillings; Grids
    • 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

  • This invention relates to aerobic and ensuing treatments of domestic sewage and wastewater, and certain types of industrial wastewaters, and to the renovation of polluted water in general.
  • a tile bed requires 80-400 m 3 of unsaturated soil, and a sand filter requires about 25-35 m 3 of sand and gravel. Significantly higher loading rates are required for the biofilter to be transportable.
  • the physical characteristics of natural filter media such as soil and sand are highly variable. The large volumes and natural variations preclude pre- anufacturing the biofilters to consistent specifications so that performance can be guaranteed at any site. Aerobic package plants that are manufactured off-site are generally highly mechanical units with high capital cost and high maintenance requirements.
  • An at-grade peat system uses natural peat as the filter medium and removes nutrients such as nitrogen and phosphorus. It requires a very specific peat and the loading rate for septic tank effluent is only 4-5 cm/day, thereby precluding central manufacture and transport of the ⁇ 50-m 3 volume. The peat also requires special handling to avoid over-compaction. The system cannot be buried and it removes a significant area of the property (-200-300 m 2 ) from use.
  • Synthetic filter media have been used for treating relatively clear water.
  • U.S. patent no. 4,427,548 granted in 1984, a slab of polyurethane foam is used as a physical and biological filter to remove solids and ammonium from aquarium water.
  • the slab filter must be removed and cleaned frequently and does not constitute an alternative biofilter for treating potent wastewater with high solids and biochemical oxygen demand. Under high loading rates of potent wastewater, solid foam soon plugs up and becomes anaerobic, similar to a solid particle biofilter.
  • the invention includes a high-efficiency biofiltration module which provides thorough wastewater treatment in a relatively small contained volume, because of the distinctive physical properties of a special absorbent filter medium. It also includes preferably at least one water-saturated module which further renovates wastewater while isolated from the natural environment. Each module generally has a specific treatment function, including aeration, nitrate or phosphorus removal , organic solvent removal, etc. Modules of similar function (e.g., two or more aerobic modules and/or two or more saturated modules) may be combined for larger capacity.
  • Wastewater such as septic tank effluent, or any water which contains biodegradable matter, is introduced into a free-draining aerobic module which contains the special absorbent biofilter medium.
  • the aerobic filter medium is a material with superior water retention and air-permeability properties, such as polyurethane foam particles or a foam slab with aeration conduits formed through it.
  • the particles have open cellular interiors so that the wastewater is transferred through the interiors of the particles or through the foam slab, while the large voids between the particles or the aeration conduits remain open, precluding plugging by biomat development and allowing for simultaneous wastewater loading and air ventilation.
  • solid particle media must be loaded intermittently, then allowed to drain free to be ventilated.
  • the combination of water retention and ventilation allows for greatly increased loading rates (consistently 10 times or more higher) over that of solid particle media such as sand or a solid slab of foam without aeration conduits.
  • the wastewater percolates slowly downwardly through the unsaturated filter medium in the aerobic module, during which time it is renovated by microbial activity.
  • Natural air convection through vents in the container wall ordinarily provides adequate treatment of organic matter, solids, and pathogens. However, to achieve full nitrification and ammonia removal at low temperatures, the air flow through the medium should be increased by means of larger voids between particles or by artificial forced air means. If the wastewater contains adequate dissolved oxygen for the treatment process, simple vents through the container provide adequate aeration by natural convection.
  • the aerobically treated water collects at the bottom of the aerobic module and passes to the next treatment module in series, usually a saturated module with a reactive medium for removal of nitrate, phosphorus, or other constituents. Alternatively the aerobically treated water may be discharged directly to the environment in some cases.
  • Denitrification and further biological filter treatment can be provided by one or more saturated modules containing a suitable filter medium.
  • non- reactive media such as synthetic foam particles provide a protected attachment means for microbes to biodegrade nitrate or chemicals.
  • Reactive or absorbing media such as coal, limestone, cellulose, or iron oxides provide a variety of treatments for removal of undesirable constituents.
  • the invention works effectively in drainage and soil conditions which are otherwise inappropriate for conventional, engineered, or peat tile beds.
  • the modules can be placed above or below ground and can be designed to operate with or without electricity.
  • the invention provides a high rate, single-pass aerobic biofilter for potent wastewater treatment which has low maintenance demands, and which can be pre- manufactured off-site and transported to the site for consistent performance.
  • the invention replaces and improves upon tile beds and sand filters, and has fewer maintenance requirements than mechanized aeration systems.
  • Fig. 1 is a schematic cross-section of the modular treatment invention which replaces the conventional tile bed with an aerobic biofilter, and removes additional constituents in subsequent treatment modules
  • Fig. 2 shows the invention in a vertical configuration for above-ground installation. Ventilation pipes enhance the aerobic treatment, especially to provide thorough nitrification at low temperatures
  • Fig. 3 is a perspective drawing of an unsaturated aerobic module with a low profile designed specifically for burial. Wastewater and ventilation air flow paths through the treatment medium are indicated;
  • Fig. 4 is a perspective drawing of a water- saturated module for burial or surface installation. Water flow paths are circuitous through the module to maximize contact with the treatment medium;
  • Fig. 5 is a schematic cross-section showing a prior art medium such as sand; and Fig. 6 is a schematic cross-section showing an example of the medium in the present invention.
  • the aerobic module 100 (shown schematically in Figs. 1 and 2 and in detail in Fig. 3) is the key element in the treatment process and preferably includes a container 100, a distribution header 110, a treatment medium 115, and a ventilation means 175.
  • the structure of the container 100 includes a wastewater inlet 105, a treated water outlet 125, and an optional inspection or access port 150. It may be buried, as illustrated in Fig. 1, if the water table is sufficiently low, or installed on the surface.
  • the distribution header 110 is embedded proximate the top of the treatment medium 115 and is connected to the wastewater inlet 105.
  • the distribution header 110 is supported by any suitable means.
  • the air ventilation means 175 preferably includes an air collection header 155 embedded proximate the bottom of the medium 115, an air inlet 150, an air outlet 170, and an air ventilation fan 165.
  • the air collection header 155 is supported by any suitable means.
  • the air ventilation means 175 includes the air inlet 150 or air outlet 170.
  • ventilation air may be introduced through the distribution header 110 along with the wastewater by means of a pump using compressed air as a driving means.
  • the treatment medium 115 substantially fills the module 100.
  • Wastewater 130 is introduced to the aerobic module 100 through the inlet 105, into the distribution header 110.
  • the water percolates slowly downwardly through the absorbent medium 115 where treatment is effected, and is discharged through the outlet 125 to another treatment module, such as a water-saturated module 200 as shown in Figs. 1 and 4, or to the environmen .
  • Ventilation air 145 is preferably brought in through the inlet 150 and is drawn through the permeable medium 115 to the collection header 155, and is discharged through the outlet 170.
  • air may be introduced by a fan or with the wastewater by means of an air-driven pump.
  • the container used for the aerobic module 100 is enclosed and made of any suitable material which is preferably impermeable, non-reactive, durable, and structurally sound, such as plastic or concrete.
  • the container may be of any reasonable shape, and the size of the container is typically approximately
  • the water and air inlets and outlets 105, 125, 150, 170 are through-wall fittings of durable materials such as plastic, are appropriately sized, and are connected by any suitable means.
  • the inlet 105 is preferably located proximate the top of the module and the outlet 125 is located proximate the bottom, ensuring free drainage of the wastewater through the module 100.
  • the inlet 105 may be proximate the bottom for convenience or to prevent freezing, although the distribution header will of course still be proximate the top.
  • the access port 150 should allow for inspection and maintenance and can double as the air inlet for ventilation air 145.
  • the distribution header 110 is a means to distribute the wastewater evenly and directly into the upper portions of the medium 115.
  • the header 110 can be made of perforated tubes of durable plastic such as PVC, appropriately sized, connected by any suitable means and supported by any suitable means. If dosing is by pump or siphon surge, the header 110 can be a series of spray nozzles, preferably discharging onto splash plates (not shown).
  • the distribution header 110 is shaped and perforations therein are sized and positioned so that the wastewater is evenly distributed onto the medium 115.
  • the spray nozzles and splash plates in header 110 are arranged to spray evenly onto the medium 115.
  • the air ventilation means 175 preferably includes a ventilation air inlet 150 (previously described), an air collection header 155, a fan 165, and an air outlet 170 (previously described) .
  • the air collection header 155 is preferably made of perforated plastic tubes of appropriate size, connected by any suitable means, and supported by any suitable means. Appropriate perforations are positioned uniformly along the tubes, such as every 10-20 cm, for example. Durable screen preferably covers the perforated tubes to prevent clogging by the medium 115 which preferably surrounds the header 155.
  • the air collection header 155 is shaped so that the ventilation air is distributed as evenly as possible through the medium 115. For example, in field trials of the configuration shown in Fig. 2, a long, narrow rectangular loop of perforated tube was found to be effective in ventilating a long narrow tank.
  • a fan 165 is located proximate the air outlet 170 to facilitate ventilation of the module 100.
  • the fan 165 can be electric or wind- driven.
  • the air ventilation means 175 includes the air inlet 150 or air outlet 170. In another embodiment, the air ventilation means 175 includes an air-driven pump and the air outlet 170. Function - air flow through media and ventilation system The ventilation air is brought into the module 100 to sustain aerobic biotic activity within the medium 115 and to aerate the water. Flow can be directed upwardly or downwardly through the medium 115, but odour in the vented air 148 is minimized if the air flow follows the path of the wastewater. Odour removal can also be effected by passing the discharged air 148 through a de-odourizing media such as natural peat or activated charcoal (not shown) .
  • a de-odourizing media such as natural peat or activated charcoal (not shown) .
  • the treatment medium 115 is a means for conveying the wastewater slowly downwardly through the aerobic module 100 and promoting aeration. Water treatment within a module.of reasonable size is possible only with the use of medium 115 which has superior water retention and air permeability properties.
  • Preferred materials for the medium 115 include particles of open cellular synthetic foam such as flexible polyurethane foam, modified synthetic foam, sponge, or other similar materials. These absorbent particles transmit water through their interiors by way of the open cells, and also have high water-retention capacity. The particles remain water-saturated, but air ventilation occurs simultaneously through the open voids between the particles. For example, excellent aerobic treatment was attained in laboratory and field experiments with particles of polyurethane foam of mixed sizes ranging generally between about 0.5 and 5 cm. A narrow size distribution of larger particles provides larger and more open void spaces between the particles for ease of aeration, whereas a distribution of small and large particles provides smaller void spaces and more restricted air flow.
  • the medium 115 does not necessarily require a particulate form, but could rather be a solid slab of plastic foam, for example, with aeration conduits formed substantially through it to allow diffusion of oxygen from the conduits to the water contained in the foam interior. This format would ease the fabrication of the aerobic module 100.
  • the size and separation of the aeration conduits would depend on the loading rate and wastewater potency but could be 2 cm in diameter, and distributed through the slab every 10 to 20 cm, for example.
  • the conduits would preferably be oriented approximately vertically with optional horizontal interconnections.
  • the medium material preferably should be durable enough to retain these superior properties over the expected life span of the system (e.g., 20-30 years).
  • the unsaturated aerobic module 100 reproduces the processes of a conventional tile bed in a small, aerobic container 100 (e.g., 3-5 m 3 for a typical domicile).
  • the medium 115 sustains diverse populations of beneficial biota by providing protection from desiccation, extreme temperatures, and washouts by increased flow of wastewater.
  • the medium 115 allows entry of ventilation air through the large air-filled void spaces 116 between the water- filled foam particles 117 (or through the aeration conduits in the case of solid foam blocks) , provides nutrient-rich wastewater to sustain the biotic populations, and retains it long enough to be thoroughly treated in the biofilter.
  • the large arrows illustrate air flow through the voids
  • the small arrows illustrate wastewater flow through the particles.
  • ventilation air cannot flow, since the space between particles is filled with the wastewater.
  • the saturated module shown in Fig. 4, includes a container 200, and a treatment medium 215 and preferably, vertical flow baffles 210.
  • the structure of the container 200 includes a water inlet 205 and a water outlet 225.
  • the flow baffles 210 are preferably fastened to the interior walls.
  • the treatment medium 215 substantially fills the module.
  • the module 200 can be placed either adjacent to or under the aerobic module 100 as desired or as space limitations demand.
  • the saturated module 200 receives aerobically treated water through the water inlet 205 and guides it through the treatment medium 215 around the flow baffles 210, and discharges it through the outlet 225.
  • the circuitous flow path maximizes exposure of the water to the medium 215.
  • the saturated module 200 promotes anaerobic biological activity to remove additional undesirable constituents discharged from the aerobic module 100.
  • the saturated module 200 is convenient for abiotic removal of phosphate and other contaminants, although an anaerobic environment is not a requirement.
  • the saturated module 200 is a self-contained, water-saturated module containing media conducive to the growth and maintenance of beneficial anaerobic bacteria and biota. Water is passed to it at a rate sufficient to allow the media to retain the effluent to further treat the water before displacement by additional aerobic effluent.
  • the container used for the saturated module 200 is made of any suitable material which is preferably impermeable, non-reactive, durable, and structurally sound, such as plastic or concrete.
  • the container may be of any reasonable shape, and the size of the container should be adequate for a residence time of about 1 day.
  • the containers require an access port (not shown) with a removable cover for filling and inspection.
  • the water inlet and outlets 205, 225 are through-wall ittings of durable materials such as plastic, are appropriately sized, and are connected by any suitable means.
  • the inlet and outlets 205, 225 are proximate the top of the container to maintain saturated conditions.
  • the inlet 205 brings aerobically treated water into the saturated module 200.
  • Durable screen preferably covers the inside of the inlet and outlet 205, 225 to keep the medium 215 inside module 200.
  • the treatment medium 215 includes any natural or artificial material which promotes biotic and abiotic treatment under water-saturated conditions, and which is sustainable over the expected life of the system (e.g. , 20-30 years) .
  • Removal of phosphorus from wastewater is an abiotic chemical reaction process which occurs when dissolved phosphorus reacts with calcium carbonate to create a calcium phosphate mineral. Crushed limestone can therefore be used as a treatment medium 215 to remove phosphorus. Phosphorus is also adsorbed onto iron oxy- hydroxides in acidic conditions, and therefore certain crushed iron ores, pellets, or similar material can be used as treatment media. Organic solvents can be absorbed onto media such as coal particles which may be mixed with other media in the saturated modules. Foam particles may be mixed in with the reactive media to promote microbial populations.
  • the aerobic module 100 can be used to renovate polluted water for domestic consumption.
  • Inorganic matter such as clay and mud is first removed by any suitable conventional filtration means.
  • Laboratory experiments show that at 20°C, coliform bacteria are reduced by 5-6 orders of magnitude in ⁇ 1 m thickness of polyurethane foam medium 115.
  • the medium 115 acts as a physical filter as well as a biological filter, and is able to retain and remove larger harmful biota, such as Giardia cysts. Tropical climates are ideal for this invention and are the areas where water-borne diseases are most prevalent.
  • the invention provides a means for single-pass aerobic treatment of potent wastewater at high loading rates in a small, contained and transportable volume, by way of a special absorbent filter medium and ventilation means.
  • the aerobically treated water can be collected and further treated in water-saturated modules to remove undesirable constituents such as nitrate and phosphorus.
  • the invention is independent of the natural environment and does not require high maintenance mechanical devices.
  • Anaerobic septic tank effluent is an obvious wastewater source for the invention, but any water containing undesirable biodegradable matter can be treated, such as polluted surface water.
  • the apparatus can be placed above or below ground and is equally effective in all drainage and soil or rock conditions, even conditions which are inappropriate for conventional or engineered tile beds.
  • wastewater treatment system may:
  • (7) be customized to treat a particular type or volume of wastewater by adding a particular treatment module or by linking modules together; (8) be connected directly to a conventional septic tank for easy retrofitting and not require special plumbing in the house or building;
  • the invention provides for aerobic and ensuing treatments of domestic sewage and wastewater, and certain types of industrial wastewaters, and to the renovation of polluted water in general.

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

On décrit un système de traitement des eaux destiné à des eaux usées très chargées telles que des effluents de fosses septiques. Ce système inclut une filtration aérobie à un seul passage dans un dispositif transportable de faible volume (100), grâce à un milieu filtrant spécial qui absorbe l'eau mais se révèle perméable à l'air (115), tel que des particules de mousse de polyuréthane (117), et il comporte un traitement complémentaire facultatif à saturation en eau visant à éliminer d'autres éléments indésirables avant que les eaux ne soient rejetées dans l'environnement. Ce biofiltre aérobie à taux de charge élevé implique peu d'exigences de maintenance, est indépendant des caractéristiques de sol et de drainage et on peut le fabriquer en fonction de résultats prévisibles.
PCT/CA1993/000199 1992-05-13 1993-05-13 Procede et appareil concernant le traitement des eaux usees Ceased WO1993023339A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88254992A 1992-05-13 1992-05-13
US07/882,549 1992-05-13

Publications (1)

Publication Number Publication Date
WO1993023339A1 true WO1993023339A1 (fr) 1993-11-25

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PCT/CA1993/000199 Ceased WO1993023339A1 (fr) 1992-05-13 1993-05-13 Procede et appareil concernant le traitement des eaux usees

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AU (1) AU4055693A (fr)
CA (1) CA2096175C (fr)
WO (1) WO1993023339A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996031437A1 (fr) * 1995-04-07 1996-10-10 Dowmus Pty. Ltd. Systeme de traitement des effluents
KR100212527B1 (ko) * 1997-04-30 1999-10-01 최상진 수처리 매체 및 반응용기에 의한 오폐수 처리장치
FR2800727A1 (fr) * 1999-11-05 2001-05-11 Simop Dispositif d'epuration d'effluents liquides en particulier d'eaux usees domestiques et/ou collectives
CN114195327A (zh) * 2021-12-02 2022-03-18 何京恩 生活污水净化排放系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792355A (en) * 1995-09-15 1998-08-11 Desjardins; Gaetan Process for treating waste water
GB0625791D0 (en) 2006-12-22 2007-02-07 Jowett Craig E Lateral flow filter,water & wastewater treatment system
CN113024012A (zh) * 2020-12-24 2021-06-25 江苏力鼎环保装备有限公司 分散式户用型污水处理设备及其污水处理方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR397023A (fr) * 1908-12-02 1909-04-27 Jean Baudet Fosse septique
FR436764A (fr) * 1911-10-21 1912-04-04 Monney Et Cie Soc Fosse septique avec épurateur
US3543937A (en) * 1968-08-02 1970-12-01 Joseph M Choun Filter media
US4201663A (en) * 1978-09-07 1980-05-06 Dornbush James N Method and apparatus for the enhanced treatment of food processing waste waters using aerobic microorganisms
WO1980002556A1 (fr) * 1979-05-21 1980-11-27 C2F Investment Co Systeme de traitement sur place des eaux residuaires
EP0104525A2 (fr) * 1982-09-25 1984-04-04 Linde Aktiengesellschaft Installation et procédé pour la purification biologique d'eau usée
FR2644773A2 (fr) * 1987-01-27 1990-09-28 Burgeap Procede et dispositif pour l'epuration d'eaux polluees

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR397023A (fr) * 1908-12-02 1909-04-27 Jean Baudet Fosse septique
FR436764A (fr) * 1911-10-21 1912-04-04 Monney Et Cie Soc Fosse septique avec épurateur
US3543937A (en) * 1968-08-02 1970-12-01 Joseph M Choun Filter media
US4201663A (en) * 1978-09-07 1980-05-06 Dornbush James N Method and apparatus for the enhanced treatment of food processing waste waters using aerobic microorganisms
WO1980002556A1 (fr) * 1979-05-21 1980-11-27 C2F Investment Co Systeme de traitement sur place des eaux residuaires
EP0104525A2 (fr) * 1982-09-25 1984-04-04 Linde Aktiengesellschaft Installation et procédé pour la purification biologique d'eau usée
FR2644773A2 (fr) * 1987-01-27 1990-09-28 Burgeap Procede et dispositif pour l'epuration d'eaux polluees

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996031437A1 (fr) * 1995-04-07 1996-10-10 Dowmus Pty. Ltd. Systeme de traitement des effluents
US5919366A (en) * 1995-04-07 1999-07-06 Dowmus Pty. Ltd. Effluent treatment system
KR100212527B1 (ko) * 1997-04-30 1999-10-01 최상진 수처리 매체 및 반응용기에 의한 오폐수 처리장치
FR2800727A1 (fr) * 1999-11-05 2001-05-11 Simop Dispositif d'epuration d'effluents liquides en particulier d'eaux usees domestiques et/ou collectives
CN114195327A (zh) * 2021-12-02 2022-03-18 何京恩 生活污水净化排放系统

Also Published As

Publication number Publication date
AU4055693A (en) 1993-12-13
CA2096175C (fr) 1999-05-11
CA2096175A1 (fr) 1993-11-14

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