CA2204422A1 - Method of treating the liquid fraction of pig manure by an aerobic biofilter and sequestration of the solid fraction by zeolite - Google Patents
Method of treating the liquid fraction of pig manure by an aerobic biofilter and sequestration of the solid fraction by zeoliteInfo
- Publication number
- CA2204422A1 CA2204422A1 CA002204422A CA2204422A CA2204422A1 CA 2204422 A1 CA2204422 A1 CA 2204422A1 CA 002204422 A CA002204422 A CA 002204422A CA 2204422 A CA2204422 A CA 2204422A CA 2204422 A1 CA2204422 A1 CA 2204422A1
- Authority
- CA
- Canada
- Prior art keywords
- fraction
- pig manure
- manure
- zeolite
- aerobic biofilter
- 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.)
- Abandoned
Links
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
- C02F3/04—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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
This disclosure relates to a process and apparatus for biological treatment of the liquid fraction of the separated pig manure by an upflow aerobic biofilter and coating the solid fraction by powder zeolite. The aerobic biofilter comprises a reactor filled with porous tubular media made with an open net type material. The media prevent clogging bysuspended material in the manure hut allows accumulation of biomass within the reactor and high oxygen transfer.
Description
D AND BACKGROUNI) Ol~ THE INVI~N I'ION
T his invention relates to a r~rocess and arlr~aratus for hiological treatment of waste liquid and more particularly to a process and ar~r)aratus for hiological Lreatment of the liquid fraction of the se~arated l~ig manure hy an ur~flow aerohic biofilter and coating of the solid fraction hy l~owder zeolite. The r~rocess and a~r~aratus according to the 20 invention may also he used for treating waste industrial water.
The most widely used way today to manage T~ig manure is through storage in lagoons or concrete reservoirs and landsl~reading in the sT)ring and the fall. For farms with sufficient cultivated land around this way of managing the manure is ar)l~ropriate as 25 long as the soil is not too r~ermeable allowing llollutants to I-ercolate and contaminate the subsurface waters.
In areas of concentration of l~ig farm u~ually an exces~ of manure versus availahle land for sr~reading exisl and this method cannot he a~ lied. In surT)lus areas different 3 o aerohic or anaerohic systems for l~iological treatment of the l~ig manure has heen insta!led in the l~ast hut several of these installati(ins are not functioning l~ror~erly. Ihe main r~rohlems associated with t~he aerohic r~roce~se~ ~uch as aerated lagoon~
CA 02204422 1997-0~-02 activated sludge or sequential batch reactors lie in the inefficiency of the existing aeration systems and in the fact that solid and liquid pig manllre is treated together biologically. The anaerobic systems require insulation of the reactors and heating in order to allow adequate completion of the biochemical reactions. In addition, any of 5 these systems require very skilled manpower to operate, which is rarely the case in a remote agricultural areas, resulting often in failures of the conventional hiological treatment processes.
Land spreading of the solid pig manure, containing high concentrations of ammonia 10 results in leaching of ammonia and other contaminants when it rains. In order to allow landspreading of solid pig manure, some ways of fixation of the nitrogenous compounds are required.
The use of the liquid fraction of the manure for pig farm floor cleaning is acceptable, as 15 long as extended biological degradation of the organic and inorganic pollutant~s had occurred. The aerobic upflow biofilter is considered as the most ap~ priate way to achieve this degradation.
OBJECTS AND SUMMARY OF THE INVENTlON
An object of the present invention is to propose a process and an apl)al~lus for treating pig manure which are very efflcacious and which do not require skilled manpower to operate.
25 Another object of the present invention is to propose a process of treating the solid fraction of the pig manure with zeolite in order to release the ammonia from the manure.
In accordance with these objects, the approach of the present invention is to first separate the liquid from the solid fraction of the pig manure and then treat them 30 separately by dirrerent technologies.
The liquid fraction is treated in an aerobic biofilter. In the aerobic biofilter system liquid pig manure fraction and air are passed upflow through a reactor filled with a porous CA 02204422 1997-0~-02 tubular plastic media. This media is circular, with diameter of preferably 7.5 cm and lengths according to the dimensions of the hioreactor. This media is of open net type on the surface, preventing any possible clogging by suspended material in the manure, but allowing accumulation of biomass within the hioreactor and high oxygen transfer.
The organic substances as measured by the biological oxygen demand in five days, or BOD5 in the liquid fraction of the pig manure are decomposed by a diverse microbial population, that accumulates on the surfaces and in the pores of the media. ln comparison to the conventional technologies which allow BOD loading from 0.3 to l 10 kg/m3 media/day the upflow aerobic biofilter according to the present invention is capable of treating organic loading from 2 to 6 kg BOD5/m3 media/day. These higher organic loading translate into very compact equipment that can be installed by the pig farm, allowing complete elimination of the manure storage lagoon. The aeration requirement~s for the aerobic biofilter are only a fraction of those for conventional 15 process, since process air is injected only for the degradation of the organic material in the manure and not for mixing of the microorganism biomass.
The injected air bubbles, while traveling upflow through the bed packed with the media according to the invention brake into very fine small bubbles in the upper sections of 20 the filter. These small bubbles allow the aerobic biofilter to provide very high oxygen transfer efficiencies solving thus one of the main problems of the conventional processes, such as activated sludge.
Since an aerobic biofilter does not need a clarifier to separate the treated liquid from
T his invention relates to a r~rocess and arlr~aratus for hiological treatment of waste liquid and more particularly to a process and ar~r)aratus for hiological Lreatment of the liquid fraction of the se~arated l~ig manure hy an ur~flow aerohic biofilter and coating of the solid fraction hy l~owder zeolite. The r~rocess and a~r~aratus according to the 20 invention may also he used for treating waste industrial water.
The most widely used way today to manage T~ig manure is through storage in lagoons or concrete reservoirs and landsl~reading in the sT)ring and the fall. For farms with sufficient cultivated land around this way of managing the manure is ar)l~ropriate as 25 long as the soil is not too r~ermeable allowing llollutants to I-ercolate and contaminate the subsurface waters.
In areas of concentration of l~ig farm u~ually an exces~ of manure versus availahle land for sr~reading exisl and this method cannot he a~ lied. In surT)lus areas different 3 o aerohic or anaerohic systems for l~iological treatment of the l~ig manure has heen insta!led in the l~ast hut several of these installati(ins are not functioning l~ror~erly. Ihe main r~rohlems associated with t~he aerohic r~roce~se~ ~uch as aerated lagoon~
CA 02204422 1997-0~-02 activated sludge or sequential batch reactors lie in the inefficiency of the existing aeration systems and in the fact that solid and liquid pig manllre is treated together biologically. The anaerobic systems require insulation of the reactors and heating in order to allow adequate completion of the biochemical reactions. In addition, any of 5 these systems require very skilled manpower to operate, which is rarely the case in a remote agricultural areas, resulting often in failures of the conventional hiological treatment processes.
Land spreading of the solid pig manure, containing high concentrations of ammonia 10 results in leaching of ammonia and other contaminants when it rains. In order to allow landspreading of solid pig manure, some ways of fixation of the nitrogenous compounds are required.
The use of the liquid fraction of the manure for pig farm floor cleaning is acceptable, as 15 long as extended biological degradation of the organic and inorganic pollutant~s had occurred. The aerobic upflow biofilter is considered as the most ap~ priate way to achieve this degradation.
OBJECTS AND SUMMARY OF THE INVENTlON
An object of the present invention is to propose a process and an apl)al~lus for treating pig manure which are very efflcacious and which do not require skilled manpower to operate.
25 Another object of the present invention is to propose a process of treating the solid fraction of the pig manure with zeolite in order to release the ammonia from the manure.
In accordance with these objects, the approach of the present invention is to first separate the liquid from the solid fraction of the pig manure and then treat them 30 separately by dirrerent technologies.
The liquid fraction is treated in an aerobic biofilter. In the aerobic biofilter system liquid pig manure fraction and air are passed upflow through a reactor filled with a porous CA 02204422 1997-0~-02 tubular plastic media. This media is circular, with diameter of preferably 7.5 cm and lengths according to the dimensions of the hioreactor. This media is of open net type on the surface, preventing any possible clogging by suspended material in the manure, but allowing accumulation of biomass within the hioreactor and high oxygen transfer.
The organic substances as measured by the biological oxygen demand in five days, or BOD5 in the liquid fraction of the pig manure are decomposed by a diverse microbial population, that accumulates on the surfaces and in the pores of the media. ln comparison to the conventional technologies which allow BOD loading from 0.3 to l 10 kg/m3 media/day the upflow aerobic biofilter according to the present invention is capable of treating organic loading from 2 to 6 kg BOD5/m3 media/day. These higher organic loading translate into very compact equipment that can be installed by the pig farm, allowing complete elimination of the manure storage lagoon. The aeration requirement~s for the aerobic biofilter are only a fraction of those for conventional 15 process, since process air is injected only for the degradation of the organic material in the manure and not for mixing of the microorganism biomass.
The injected air bubbles, while traveling upflow through the bed packed with the media according to the invention brake into very fine small bubbles in the upper sections of 20 the filter. These small bubbles allow the aerobic biofilter to provide very high oxygen transfer efficiencies solving thus one of the main problems of the conventional processes, such as activated sludge.
Since an aerobic biofilter does not need a clarifier to separate the treated liquid from
2 5 the active biomass, the process is completely automated by simple programmable apl~al alus . The operation of the aerobic biofilter packed with the plastic media as described before does not require skilled personnel.
The solid fraction of the pig manure is accumulated and once a week is mixed with 30 powder zeolite, granulated and either ambient or forced air dried. The use of ammonia affinity for zeolite has the purpose to allow exchange, fixation and slow subsequent release of ammonia, if the material is land spread.
CA 02204422 1997-0~-02 Zeolites have heen used for ion exchanger media, hut not for coating suhstance for materials with high ammonia content. The ammonia substances are fixed by the powder zeolite in the mixing and coating process and the coated pig manure is odourless. The drying of the coated material allows to bag it and export it away from the area of 5 manure surplus as valuable fertilizer.
BKIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a flow diagram of the aerohic biofilter/zeolite coating process according to 10 the invention.
Figures 2, 3 and 4 are schematic partial views in plan and cross sections of a preferred embodiment of an aerobic biofilter according to the invention.
Referring to Figure 1, the pig manure (2) from the porchery is fed into a feed tank (4).
From the feed tank (4), the pig manure is fed in a centrifugal sel~a~lol- (6) or any other separator known in the art. The liquid portion (8) of the pig manure obtained from the 20 separator (6) is then fed into an aerobic biofilter (10) packed with porous tubular plastic media (14) as described hereinbefore. As illustrated, the liquid fraction (8) is fed into the aerobic biofilter (10) from a lower portion thereof such that the liquid fraction and the air are passed upflow through the biofilter (10). The treated liquid (16) is leaving the biofilter from the upper part of the biofilter (10) and it is then fed either in a mud well 25 (18) or in a clear well (20).
The solid fraction of the pig manure (22) obtained from the separator (6) is accumulated in an appropl ;ale place (24) and once a week is mixed with a p owder zeolite, granulated and either ambiant or torced air dried for allowing exchange, fixation and
The solid fraction of the pig manure is accumulated and once a week is mixed with 30 powder zeolite, granulated and either ambient or forced air dried. The use of ammonia affinity for zeolite has the purpose to allow exchange, fixation and slow subsequent release of ammonia, if the material is land spread.
CA 02204422 1997-0~-02 Zeolites have heen used for ion exchanger media, hut not for coating suhstance for materials with high ammonia content. The ammonia substances are fixed by the powder zeolite in the mixing and coating process and the coated pig manure is odourless. The drying of the coated material allows to bag it and export it away from the area of 5 manure surplus as valuable fertilizer.
BKIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a flow diagram of the aerohic biofilter/zeolite coating process according to 10 the invention.
Figures 2, 3 and 4 are schematic partial views in plan and cross sections of a preferred embodiment of an aerobic biofilter according to the invention.
Referring to Figure 1, the pig manure (2) from the porchery is fed into a feed tank (4).
From the feed tank (4), the pig manure is fed in a centrifugal sel~a~lol- (6) or any other separator known in the art. The liquid portion (8) of the pig manure obtained from the 20 separator (6) is then fed into an aerobic biofilter (10) packed with porous tubular plastic media (14) as described hereinbefore. As illustrated, the liquid fraction (8) is fed into the aerobic biofilter (10) from a lower portion thereof such that the liquid fraction and the air are passed upflow through the biofilter (10). The treated liquid (16) is leaving the biofilter from the upper part of the biofilter (10) and it is then fed either in a mud well 25 (18) or in a clear well (20).
The solid fraction of the pig manure (22) obtained from the separator (6) is accumulated in an appropl ;ale place (24) and once a week is mixed with a p owder zeolite, granulated and either ambiant or torced air dried for allowing exchange, fixation and
3 o slow subsequent release of the ammonia from the solid fraction.
Referring to Figures 2 to 4, a preferred embodiment of an aerobic biofilter according to the present invention comprises two bioreactors (12a,12b) in series and both filled CA 02204422 1997-0~-02 with the porous tubular plastic media (14) as described hereinhefore. The liquid fraction of the pig manure is first treated in the first reactor (12a) and then it is further treated in the second bioreactor (t2h). The liquid fraction of the pig manure is fed into the bioreactors by means of conventional pump means (24) and pipe means (26).
Advantageously, an aerobic upflow biofilter packed with the porous tubular plastic media can effectively treat the liquid fraction of pig manure at organic loading of 2 to 6 kg BOD/m3 of media/day to levels allowing either reuse as flush water in the farm of direct discharge in the receiving waters.
The plastic net type tubular media does not clog with suspended material and brakes the air bubbles in3ected at the bottom to very fine buhhles, resulting in very high oxygen transfer efficiencies.
15 Coating of the solid fraction of the pig manure with powdered zeolite blocks the ammonia-nitrogen, resulting in odourless material. This material, when dried, can be spread on land an the ammonia will leach gradually.
Although a plerelled emhodiment of the present invention has heen described herein 20 and illustrated in the accompanying drawings, it is to be understood that the invention is not limited to this precise emhodiment and that various changes and modifications may he effected therein without departing from the scope or spirit of the invention.
Referring to Figures 2 to 4, a preferred embodiment of an aerobic biofilter according to the present invention comprises two bioreactors (12a,12b) in series and both filled CA 02204422 1997-0~-02 with the porous tubular plastic media (14) as described hereinhefore. The liquid fraction of the pig manure is first treated in the first reactor (12a) and then it is further treated in the second bioreactor (t2h). The liquid fraction of the pig manure is fed into the bioreactors by means of conventional pump means (24) and pipe means (26).
Advantageously, an aerobic upflow biofilter packed with the porous tubular plastic media can effectively treat the liquid fraction of pig manure at organic loading of 2 to 6 kg BOD/m3 of media/day to levels allowing either reuse as flush water in the farm of direct discharge in the receiving waters.
The plastic net type tubular media does not clog with suspended material and brakes the air bubbles in3ected at the bottom to very fine buhhles, resulting in very high oxygen transfer efficiencies.
15 Coating of the solid fraction of the pig manure with powdered zeolite blocks the ammonia-nitrogen, resulting in odourless material. This material, when dried, can be spread on land an the ammonia will leach gradually.
Although a plerelled emhodiment of the present invention has heen described herein 20 and illustrated in the accompanying drawings, it is to be understood that the invention is not limited to this precise emhodiment and that various changes and modifications may he effected therein without departing from the scope or spirit of the invention.
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002204422A CA2204422A1 (en) | 1997-05-02 | 1997-05-02 | Method of treating the liquid fraction of pig manure by an aerobic biofilter and sequestration of the solid fraction by zeolite |
US09/214,364 US6387267B1 (en) | 1997-05-02 | 1997-05-04 | Liquid waste treatment bioreactor process and apparatus |
CA 2259381 CA2259381C (en) | 1997-05-02 | 1998-05-04 | Liquid waste treatment bioreactor process and apparatus |
PCT/CA1998/000462 WO1998050311A1 (en) | 1997-05-02 | 1998-05-04 | Liquid waste treatment bioreactor process and apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002204422A CA2204422A1 (en) | 1997-05-02 | 1997-05-02 | Method of treating the liquid fraction of pig manure by an aerobic biofilter and sequestration of the solid fraction by zeolite |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2204422A1 true CA2204422A1 (en) | 1998-11-02 |
Family
ID=4160572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002204422A Abandoned CA2204422A1 (en) | 1997-05-02 | 1997-05-02 | Method of treating the liquid fraction of pig manure by an aerobic biofilter and sequestration of the solid fraction by zeolite |
Country Status (3)
Country | Link |
---|---|
US (1) | US6387267B1 (en) |
CA (1) | CA2204422A1 (en) |
WO (1) | WO1998050311A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19905593A1 (en) * | 1999-02-11 | 2000-08-17 | Schwarting Uhde Gmbh Umwelt Un | Process for the treatment of digestate |
US7001512B1 (en) * | 2001-02-09 | 2006-02-21 | David Ralph Newsome | Closed loop processing system for waste and crops |
AU2003302602A1 (en) * | 2002-11-25 | 2004-06-23 | Sr. Richard G. Sheets | Animal waste effluent treatment |
DK1575880T3 (en) * | 2002-12-19 | 2010-09-20 | Carriere R Poudrette Inc | Method and device for treating raw manure |
US7082893B2 (en) * | 2003-04-03 | 2006-08-01 | University Of Maryland Biotechnology Institute | Aquaculture nitrogen waste removal |
FR2853309B1 (en) * | 2003-04-07 | 2006-07-14 | Otv Sa | METHOD AND FACILITY FOR TREATING ANIMAL DEJECTIONS |
US7306731B1 (en) * | 2003-08-12 | 2007-12-11 | Daritech, Inc. | Manure separation for digester method and apparatus |
US7156985B1 (en) | 2004-07-16 | 2007-01-02 | Shaw Intellectual Property Holdings, Inc. | Bioreactor system having improved temperature control |
US20090065412A1 (en) * | 2007-09-11 | 2009-03-12 | Rahma Mbarki | Apparatus for waste water treatment |
US8926846B2 (en) | 2009-11-05 | 2015-01-06 | Daritech, Inc. | Systems and methods for extracting particulate from raw slurry material |
US8470183B2 (en) * | 2009-11-05 | 2013-06-25 | Daritech, Inc. | Systems and methods for extracting sand from raw slurry material |
US20110198268A1 (en) * | 2010-02-17 | 2011-08-18 | Daritech, Inc. | Hybrid rotary screen separator |
US10603611B2 (en) | 2014-05-30 | 2020-03-31 | Daritech, Inc. | Cleaning systems and methods for rotary screen separators |
US10603675B2 (en) | 2014-11-02 | 2020-03-31 | Dari-Tech, Inc. | Systems and methods for extracting particulate from raw slurry material |
WO2018144686A1 (en) * | 2017-02-02 | 2018-08-09 | Greywater Industries, Llc | Waste treatment systems and methods |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3875319A (en) * | 1973-08-16 | 1975-04-01 | Ceres Ecology Corp | Process and apparatus for recovering feed products from animal manure |
ZA762830B (en) | 1975-05-21 | 1977-04-27 | Norton Co | Trickling filters media for biological filters |
HU195457B (en) * | 1984-04-02 | 1988-05-30 | Vizepitoeipari Troeszt | Process for removing suspended materials, biogene nutrients and soluted metal-compounds from waters containing organic and inorganic impurities |
US4623529A (en) * | 1985-09-16 | 1986-11-18 | Ethyl Corporation | Method of making a zeolite of the clinoptilolite type by seeding |
JPH0783875B2 (en) | 1986-06-13 | 1995-09-13 | 東ソー株式会社 | Wastewater treatment method by activated sludge method |
FR2604990B1 (en) | 1986-10-01 | 1991-04-05 | Omnium Traitement Valorisa | PROCESS FOR THE PURIFICATION, BY A BIOLOGICAL WAY, OF WASTEWATER ON A BED OF GRANULAR MATERIAL |
FR2632947B1 (en) | 1988-06-16 | 1991-10-18 | Omnium Traitement Valorisa | PROCESS AND DEVICE FOR PURIFYING WASTEWATER ON LESS DENSITY PARTICLE BIOLOGICAL FILTER |
US5211847A (en) | 1991-04-22 | 1993-05-18 | Infilco Degremont Inc. | Denitrification methods |
WO1995006010A1 (en) | 1993-08-25 | 1995-03-02 | David Peter Froud | Biological aerated filter |
DE19520351A1 (en) * | 1995-06-07 | 1996-12-12 | Norddeutsche Seekabelwerke Ag | Packing block and method for producing the same |
JP3235957B2 (en) * | 1995-12-20 | 2001-12-04 | オルガノ株式会社 | Biological water treatment equipment |
-
1997
- 1997-05-02 CA CA002204422A patent/CA2204422A1/en not_active Abandoned
- 1997-05-04 US US09/214,364 patent/US6387267B1/en not_active Expired - Fee Related
-
1998
- 1998-05-04 WO PCT/CA1998/000462 patent/WO1998050311A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO1998050311A1 (en) | 1998-11-12 |
US6387267B1 (en) | 2002-05-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued |