A method of producing a fertiliser composition, the method comprising: •(a) providing partially decomposed organic matter; •(b) contacting the organic matter with: •(i) an anaerobic digestate; •(ii) a source of nitrate ion; •(iii) a source of ammonia; and •(c) contacting the mixture obtained in step (b) with a source of carbon dioxide. •Also claimed is a fertiliser composition comprising partially decomposed organic matter admixed with an anaerobic digestate, a source of nitrate ion, a source of ammonia and carbon dioxide.

Methods for producing a solid ammonium bicarbonate product that includes preparing an organic feedstock that contains at least one nitrogen compound by causing organic animal manure and/or organic food waste to undergo anaerobic digestion, removing solids from the organic feedstock to produce an organic liquid effluent that contains at least one of ammonium and ammonia, performing a distillation process on the organic liquid effluent to strip and concentrate a vapor mixture therefrom that contains ammonia, carbon dioxide, and water and cool the vapor mixture to produce a condensed solution containing ammonium bicarbonate and/or ammonium carbonate, contacting the condensed solution with carbon dioxide to cause an ammonium bicarbonate precipitate to form from the condensed solution, and performing an evaporation process on the ammonium bicarbonate precipitate to remove water therefrom and produce the dry, solid ammonium bicarbonate product.

The present invention relates to organic nitrogen fertilizers and methods for producing organic nitrogen fertilizers, including retrieving high concentration organic ammonia from discarded organic material.

The present invention relates to organic nitrogen fertilizers and methods for producing organic nitrogen fertilizers, including retrieving high concentration organic ammonia from discarded organic material.

The invention relates to a method and system for phosphate recovering from a waste stream, such as an animal manure waste stream. The method comprises the steps of: - providing a tank reactor, 5 - providing acidogenic bacteria and/or acetogenic bacteria and the waste stream to the tank reactor, - hydrolysing the waste stream, forming a reaction mixture; - providing a gas flow to the reaction mixture for removing carbon dioxide from the reaction mixture; 10 - providing the reaction mixture to an anaerobic sludge reactor, - removing a compound comprising phosphate from the reaction mixture within the anaerobic sludge reactor, and - removing gas from the reaction mixture within the anaerobic sludge reactor.

A bioreactor (1, 2, 3) and use thereof for converting organic residual and/or waste materials into an organic nutrient solution with a proportion of at least 10% plant-available mineralized nitrogen relative to the total nitrogen content of the nutrient solution. A process for preparing an organic nutrient solution is also provided, as well as an organic nutrient solution, use of an organic nutrient solution as an absorbent for carbon dioxide storage, use of an organic nutrient solution as an agent for binding carbon in plants and soils and to a nutrient production and carbon dioxide storage system.

The present invention relates to a method of and additives for producing treated animal manure.

The present invention relates to organic nitrogen fertilizers and methods for producing organic nitrogen fertilizers, including retrieving high concentration organic ammonia from discarded organic material.

An apparatus for recovering nutrients or water from digestate comprises one or more solid-liquid separation units, an ammonia stripping device, and a gas scrubbing unit. In a process, digestate is separated into a solids portion and a liquid portion. Ammonia is stripped from the liquid portion and converted into an ammonium salt solution which may be sold or used as, or blended with, a fertilizer product. Optionally, at least part of the remaining liquid portion may be concentrated to produce brine. The brine is mixed with the solids portion. The mixture may be dried and used as, or blended with, a fertilizer product. Optionally, a least part of the remaining liquid portion may be re-used as dilution water in a digester. A solids portion of the digestate, and one or both of an ammonium salt solution and a brine, may be used as fertilizer without thermal drying.

A digester system comprising a primary digester tank containing a primary feed material portion, a secondary digester tank containing a secondary feed material portion, a first conduit connected between the primary digester tank and the secondary digester tank to define a primary tank lower opening within the primary digester tank and a secondary digester tank lower opening within the secondary digester tank, and a flow control valve configured to allow or prevent flow of fluid through the first conduit. When the flow control valve is configured to allow flow of fluid through the first conduit, a portion of the primary feed material portion flows from the primary digester tank to the secondary digester tank to form the secondary feed material portion.