Abstract: The present invention relates to a method and a device for biological production of sulfuric acid. The invention allows the use of high concentrations of sulfur as a feed for microbiological oxidation, resulting in high conversion of sulfur to sulfuric acid and, consequently, high sulfuric acid yields, which are obtained in an environmentally friendly way.

Abstract: Waste gas mixtures produced and used in industry may contain harmful sulphurous compounds. The present disclosure provides a method for treatment of gas mixtures contaminated with harmful sulphurous compounds by using microorganisms capable of degrading said harmful sulphurous compounds which involves controlling nitrate levels in the medium in which microbiological conversion of harmful sulphurous compounds takes place at high levels.

Abstract: Disclosed is a method and a device for biological production of sulfuric acid. The disclosure allows the use of high concentrations of sulfur as a feed for microbiological oxidation, resulting in high conversion of sulfur to sulfuric acid and, consequently, high sulfuric acid yields, which are obtained in an environmentally friendly way.

Abstract: The present disclosure relates to a method for removing ammonia from exhaust air from a livestock stable and a device for removing ammonia from exhaust air from a livestock stable. The method and the device of the disclosure allow to a achieve a complete or near complete removal of ammonia from exhaust air. Moreover, the method and device of the disclosure allow full nitrification to nitrate, thus obviating the problem of toxic nitrite in the waste water after scrubbing the exhaust air.

Abstract: The present disclosure relates to a filter material which can be used in reducing the content of contaminants in a raw gas or liquid and a device which comprises the filter material. The disclosure also relates to a method for reducing the content of contaminants in a raw gas or liquid which applies the filter material and/or device.

Abstract: Waste gas mixtures produced and used in industry may contain harmful sulphurous compounds. The present disclosure provides a method for treatment of gas mixtures contaminated with harmful sulphurous compounds by using microorganisms capable of degrading said harmful sulphurous compounds which involves controlling nitrate levels in the medium in which microbiological conversion of harmful sulphurous compounds takes place at high levels.

Abstract: Provided is a method for treatment of gas mixtures and an apparatus for carrying out a method for treatment of raw gas mixtures. More particularly, there is provided a method and an apparatus for treatment of gas mixtures, such as biogas or flare gas, and in particular to a method and an apparatus for removing contaminants, in particular H2S, from a gas mixture containing CH4 and H2S.

Abstract: The present disclosure relates to a filter material which can be used in reducing the content of contaminants in a raw gas or liquid and a device which comprises the filter material. The disclosure also relates to a method for reducing the content of contaminants in a raw gas or liquid which applies the filter material and/or device.

Abstract: Provided is a method for treatment of gas mixtures and an apparatus for carrying out a method for treatment of raw gas mixtures. More particularly, there is provided a method and an apparatus for treatment of gas mixtures, such as biogas or flare gas, and in particular to a method and an apparatus for removing contaminants, in particular H2S, from a gas mixture containing CH4 and H2S.

Abstract: Device for purifying gases, such as air in particular, or liquids, such as water in particular, in which use is made of micro-organisms. The device comprises a chamber (1) containing at least one filter pattern (7) and having intakes and outlets (12, 13) for the medium that is to be purified. The filter pattern is obtained by making use of virtually two-dimensional geo-textile (8) made from sprayed plastic threads with a thickness of approximately 2 mm for retaining the micro-organisms, and a three-dimensional geo-textile (9) with a thickness of approximately 10 mm, allowing the medium that is to be treated to flow alongside the micro-organisms. The geotextile materials (8, 9) are placed on top of each other and jointly rolled up to form the filter pattern (7). The geo-textile material may for instance be made of HDPE or polypropylene.

Abstract: Device for purifying gases or liquids comprises a chamber provided with intakes and outlets, in which filter material is incorporated. Micro organisms are used for the purification. The filter material is a flat mat having large open pores and being made of foamed plastic material, which is rolled-up with a supporting element made of—at least partly—undulated, mutually connected, resilient threads, so that a certain distance between the parts of the mat radially following one another remains free. The rolled-up mat can be fittingly mounted in a supporting structure, such as a pipe. A number of pipes can be stacked within the chamber.

Abstract: A device for purifying gases, such as air in particular, or liquids, such as water in particular. The device comprises a chamber in which filter material is incorporated. The chamber has inlets and outlets for the medium to be purified. The medium is led through filter material, in which micro-organisms are employed for the purification. A mat having large open pores is used as filter material. The mat is manufactured from foamed plastic material having open pores and is flat on one side and is provided with extrusions on the other side. The material may be polyurethane. The mat is wound in such a way that it can be situated on a tube. The chamber has a substantially cylindrical shape into which the rolled-up mat can be fittingly slid.

Abstract: Method and apparatus for the cleaning of gases, in particular air, with the aid of organic filtration material, in which the filtration material is placed upon a grating floor located inside a chamber (5) which is moveable and--after the filtration material has been charged in it--is lifted up and placed on top of an air supply room (1), such that a seal is obtained between the chamber (5) and the air supply room (1). After the filtration material has lost its activity, the chamber (5) can be lifted off the air supply room (1) and be replaced with a chamber (5) having new filtration material. The chamber (5) can be tilted for removing the filtration material from it, and can be provided with humidification tubes (14) and with tubing (15) for pre-heating the air.