The present disclosure concerns a method for producing fertilizer particles comprising an alternative source of boron. It is found that certain colemanite and ulexite powders can be supplied to a fertilizer melt shortly before granulation essentially without dissolving into the melt. Accordingly, the fertilizer particles produced from the melt may contain negligible amounts or non-detectable levels of sodium borates or boric acid. Furthermore, the fertilizer particles can be homogeneous which is desirable for boron supplying fertilizers. It is also found that the fertilizer particles can supply boron to plants at a rate comparable to borax pentahydrate.

Embodiments described herein provide systems and methods for a phosphate processing system with integrated sub-systems, such as a phosphoric acid plant, precipitation system, crystallizer system, rinsing system, granulation system, pond water system, organics removal system, and/or exhaust treatment system. Such sub-systems can be integrated with each other by using one or more output streams from one or more sub-systems as one or more input streams for one or more sub-systems. In some embodiments, the phosphate processing system can produce phosphoric acid, struvite containing fertilizer, fertilizer using recycled struvite, magnesium or fluoride containing compositions using recycled magnesium or fluoride, and other components using phosphoric acid collected from a phosphoric acid and gypsum composition or using sludge collected from a waste stream, for example.

Embodiments described herein provide systems and methods for a phosphate processing system with integrated sub-systems, such as a phosphoric acid plant, precipitation system, crystallizer system, rinsing system, granulation system, pond water system, organics removal system, and/or exhaust treatment system. Such sub-systems can be integrated with each other by using one or more output streams from one or more sub-systems as one or more input streams for one or more sub-systems. In some embodiments, the phosphate processing system can produce phosphoric acid, struvite containing fertilizer, fertilizer using recycled struvite, magnesium or fluoride containing compositions using recycled magnesium or fluoride, and other components using phosphoric acid collected from a phosphoric acid and gypsum composition or using sludge collected from a waste stream, for example.

The invention relates to a process for the combined recycling of phosphate and nitrogen from sewage sludge. The core task of the invention consists of the recycling of phosphorous from sewage sludge ash and the reaction of phosphorous with nitrogen from the vapors of the sewage sludge drying and the manure to form NP fertilizer diammonium phosphate.

The present invention relates to a novel phosphate solubilizing strain of Penicillium bilaiae, which is a hybrid of Penicillium bilaiae ATCC 22348 and Penicillium bilaiae V08/021001, as well as compositions and methods for using the novel phosphate solubilizing strain to increase the availability of phosphorous for plant uptake from soil.

The present invention relates to a novel phosphate solubilizing strain of Penicillium bilaiae, which is a hybrid of Penicillium bilaiae ATCC 22348 and Penicillium bilaiae V08/021001, as well as compositions and methods for using the novel phosphate solubilizing strain to increase the availability of phosphorous for plant uptake from soil.

The present invention relates to a novel phosphate solubilizing strain of Penicillium bilaiae, which is a hybrid of Penicillium bilaiae ATCC 22348 and Penicillium bilaiae V08/021001, as well as compositions and methods for using the novel phosphate solubilizing strain to increase the availability of phosphorous for plant uptake from soil.

A controlled-release fertilizer composition, methods of making, and uses thereof are described. The controlled-release fertilizer composition includes a composite graphene-carbon nanotube material having a three-dimensional open-celled network of graphene and carbon nanotubes and a fertilizer impregnated in the three-dimensional open-celled network of graphene and carbon nanotubes.

A controlled-release fertilizer composition, methods of making, and uses thereof are described. The controlled-release fertilizer composition includes a composite graphene-carbon nanotube material having a three-dimensional open-celled network of graphene and carbon nanotubes and a fertilizer impregnated in the three-dimensional open-celled network of graphene and carbon nanotubes.

Disclosed herein is a fertilizer composition including a plant nutrient comprising a phosphorus compound; and an inorganic acidic compound free of phosphorus. The fertiliser composition can also comprise a fertilizer granule and a coating disposed on the fertilizer granule wherein the fertilizer granule comprises a plant nutrient; and the coating comprises sulfuric acid, nitric acid, hydrochloric acid, or a combination. The plant nutrient comprises a phosphorus compound. The fertilizer composition is useful in fertigation.