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1. WO2020141978 - CLIMATE CONTROLLED STABLE

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[ EN ]

CLAIMS:

1. A system (10) comprising a closed stable (100) comprising a stable space (110) for housing ruminants, wherein the system (10) is configured for controlling in a controlling mode a methane concentration in the stable air (11a) between a minimal methane concentration Cm- ³ 500 ppmv and a maximal methane concentration Cm+ selected to be equal to or smaller than the lower explosion limit of methane in the stable air CmLEL, and wherein the system (10) is configured for controlling in the controlling mode a dinitrogen (N2) concentration in the stable air (1 la) to be smaller than the ambient dinitrogen concentration in ambient air (1 lb).

2. The system (10) according to claim 1, wherein the minimal methane concentration Cm- ³ 5000 ppmv, and wherein the maximal methane (CH4) concentration Cm+ £ 45.000 ppmv, wherein the system (200) is configured for controlling in a controlling mode a dinitrogen (N2) concentration in the stable air (11a) to be in a range of 700.000-780.000 ppmv.

3. The system (10) according to any of the preceding claims, wherein the system (200) is configured for controlling in a controlling mode the concentration in the stable air (11a) of:

methane (CH4) to be in the range of 500-45.000 ppmv,

dinitrogen (N2) to be in the range of 700.000-780.000 ppmv,

dioxygen (O2) to be in the range of 180.000-240.000 ppmv,

carbon dioxide (CO2) to be in the range of 0-20.000 ppmv,

- ammonia (NH3) to be in the range of 0-1.000 ppmv,

non-methane volatile organic compounds to be in the range of 0-500 ppmv, and hydrogen sulfide (TLS) to be in the range of 0-500 ppmv.

4. The system (10) according to any one of the preceding claims, wherein the system (10) further comprises a methane filter system (220a) comprising a methane filter

(221a), wherein the methane filter (221a) is configured for capturing methane (CTL) from the stable air (11a), fed to the methane filter (221a) and wherein the methane filter system (220a) is configured to provide the captured methane (CTL) to a methane consumption

system (90) and/or to a methane storage system (95), wherein the system (10) further comprises a dinitrogen fdter system (220b), wherein the dinitrogen fdter system (220b) comprises a dinitrogen filter (221b), wherein the dinitrogen filter (221b) is configured for capturing dinitrogen (N2) from the stable air (11a) and/or from ambient air (11b) fed to the dinitrogen filter (221b), and wherein the dinitrogen filter system (220b) is configured to provide the captured dinitrogen (N2) to the ambient air (1 ).

5. The system (10) according to any one of the preceding claims, wherein the system (10) comprises a circulation space (60) in fluid connection to the stable space (110), wherein the circulation space (60) is configured to receive stable air (1 la) from the stable space (110) and to provide recirculated air (11d) to the stable space (110), wherein the circulation space (60) is functionally coupled to an air property adjustment device configured such that an air property of the recirculated air (l id) differs from the air property of the stable air (11a), wherein the air property is selected from the group consisting of a temperature, a relative humidity, and an air composition, wherein the air property adjustment device at least comprises a cooling device (250) wherein the system (200) is configured for controlling the cooling device (250) to control a temperature of the stable air (11a) in the range of 0-20 °C, and wherein the system (200) is configured for controlling the cooling device (250) such that a temperature difference between the recirculated air (l id) and the stable air ( 1 la) is less than 5 °C.

6. The system (10) according to claim 5, wherein the stable (100) comprises a wall (20) and a roof (40) defining the stable space (110), wherein at least part of the wall (20) comprises an inner wall (21) and an outer wall (22), wherein at least part of the circulation space (60) is arranged between the inner wall (21) and the outer wall (22), wherein the inner wall (21) comprises a wall opening (101, 102) configured to provide the fluid connection between the stable space (110) and the circulation space (60), and wherein the cooling device (250) is arranged at the wall opening (101, 102) such that at least part of the air flowing between the stable space (110) and the circulation space (60) passes the cooling device (250).

7. The system (10) according to any one of the preceding claims 5-6, wherein the system (10) comprises a recirculated air supply (64) configured for guiding recirculated air (l id) from the circulation space (60) to the stable space (110), wherein the recirculated air supply (64) comprises an air conduit (65) arranged in the stable space (110), wherein the air conduit comprises perforations (66) configured for distributing the recirculated air (l id) over the stable space (110).

8. The system (10) according to any one of the preceding claims, wherein the stable (10) further comprises a floor element (50) configured for separating manure (51) and urine (52) deposited at the floor element (50), wherein the floor element (50) comprises a urine duct (53) for guiding urine (52) to a urine collection space, wherein the system (10) further comprises an air extraction system, wherein the air extraction system is configured to extract urine-associated air from one or more of the urine duct (53) and the urine collection space.

9. The system (10) according to any one of the preceding claims 4-8, wherein the system (10) further comprises an airflow device (260) configured for providing one or more of:

a methane filter airflow to the methane filter system (220a), wherein the methane filter airflow comprises stable air (11a),

a dinitrogen filter airflow to the dinitrogen filter system (220b), wherein the dinitrogen filter airflow comprises stable air (11a) and/or ambient air (11b),

a dehumidifying airflow to the dehumidifier (270), wherein the dehumidifying airflow comprises stable air (1 la) and/or ambient air (11b),

a cooling airflow to the cooling device (250), wherein the cooling airflow comprises stable air (11a) and/or ambient air (11b),

a recirculation airflow to and from the circulation space (60), wherein the recirculation airflow respectively comprises stable air ( 11a) and recirculated air (11d), and

an extraction airflow to extract urine-associated air from one or more of the urine duct (53) and the urine collection space, wherein the extraction airflow comprises urine-associated air.

10. The system (10) according to any one of the preceding claims, wherein the system (10) comprises a dehumidifier (270), wherein the system (200) is configured for +ontrolling the dehumidifier (270) to control a relative humidity of the stable air (11a) in the range of 35-80%.

11. A method for reducing gaseous emissions from livestock keeping, wherein the livestock comprises ruminants, the method comprising:

housing the livestock in a stable space (110) of a closed stable (100), wherein the stable space (110) comprises stable air (1 la);

controlling a methane concentration in the stable air (11a) by capturing methane from the stable air (1 1a) such that the methane concentration is controlled between a minimal methane concentration Cm- ³ 500 ppmv and a maximal methane concentration Cm selected to be equal to or smaller than the lower explosion limit of methane in the stable air CmLEL;

controlling a dinitrogen concentration in the stable air (11a) by capturing dinitrogen from the stable air (11a) such that the dinitrogen concentration is smaller than the ambient dinitrogen concentration in ambient air (1 lb); and

providing the captured methane to a methane consumption system (90) and/or a methane storage system (95).

12. The method according to claim 11, wherein the minimal methane concentration Cm- is selected equal to or larger than 5000 ppmv, and wherein the maximal methane concentration Cm+ is selected equal to or smaller than 45.000 ppmv, wherein the method further comprises controlling the dinitrogen concentration in the stable air (11a) to be in the range of 700.000-780.000 ppmv.

13. The method according to any of the preceding claims 11-12, the method comprising controlling in a controlling mode the concentration in the stable air of:

methane (CH4) to be in the range of 500-45.000 ppmv,

dinitrogen (N2) to be in the range of 700.000-780.000 ppmv,

di oxygen (O2) to be in the range of 180.000-240.000 ppmv,

carbon dioxide (CO2) to be in the range of 0-20.000 ppmv,

ammonia (NH3) to be in the range of 0-1.000 ppmv,

non-methane volatile organic compounds to be in the range of 0-500 ppmv, and hydrogen sulfide (H2S) to be in the range of 0-500 ppmv.

14. The method according to any of the preceding claims 11-13, the method comprising providing stable air (11a) from the stable space (110) to a circulation space (60) in fluid connection to the stable space (110) and providing recirculated air (l id) from the circulation space (60) to the stable space (11); and controlling a temperature difference between the recirculated air (l id) and the stable air (1 la) to be less than 5 °C.

15. The method according to any of the preceding claims 11-14, the method further comprising (i) separating manure (51) and urine (52) deposited by the livestock at a floor of the closed stable (100), and (ii) extracting urine-associated air from urine (52) and providing the extracted urine-associated air to an ammonia processing system.

16. The method according to any of the preceding claims 11-15, the method comprising providing the stable air to a cooling device and/or a dehumidifier to control a relative humidity of the stable air (11a) in the range of 35-80%, and/or to control a temperature of the stable air (11a) in the range of 0-20 °C.