A system and method for providing fertilizer for crop production in an aqueous solution comprising nano-sized fertilizer particles, which are free of any chemical side chain and free any micelle to protect the nano-sized particle from re-agglomeration, suspended therein for improved uptake by the population of the crop.

The invention provides an installation (10) for separating phosphate from phosphate-containing liquids and obtaining phosphate salts, having one or more reactors (12) which each have two electrodes of opposing polarity and which, between them, span a reaction area, wherein each reactor (12) has an inlet (14) and an outlet (16), in which the outlet (16) is separated into a recirculation (22) and a discharge stream (24) and the recirculation (22) supplies part of the liquid from the outlet (16) of the reactor (12) to the inlet of the same reactor or a different reactor (12); and to a method for this and to a biological wastewater treatment plant and to a method for operating the latter.

The invention provides an installation (10) for separating phosphate from phosphate-containing liquids and obtaining phosphate salts, having one or more reactors (12) which each have two electrodes of opposing polarity and which, between them, span a reaction area, wherein each reactor (12) has an inlet (14) and an outlet (16), in which the outlet (16) is separated into a recirculation (22) and a discharge stream (24) and the recirculation (22) supplies part of the liquid from the outlet (16) of the reactor (12) to the inlet of the same reactor or a different reactor (12); and to a method for this and to a biological wastewater treatment plant and to a method for operating the latter.

A composition, in the form of an aqueous suspension. The composition comprises at least one form of attapulgite present in a solid weight fraction (SWF) amount ranging from 0.065% to 0.30%. The composition comprises kaolin present in a percent solids by weight (w/w %) amount ranging from 0.80% to 2.80%. The composition comprises one or more main plant nutrients or major animal mineral nutrient supplements. In the composition, the total percent solids by weight (w/w %) amount in the composition ranges from 45% to 90%. Although usable for other purposes, the composition is usable as a fertilizer. Although makeable in other ways, the composition is makeable by mixing the ingredients with agitation sufficient enough to form an aqueous suspension.

A composition, in the form of an aqueous suspension. The composition comprises at least one form of attapulgite present in a solid weight fraction (SWF) amount ranging from 0.065% to 0.30%. The composition comprises kaolin present in a percent solids by weight (w/w %) amount ranging from 0.80% to 2.80%. The composition comprises one or more main plant nutrients or major animal mineral nutrient supplements. In the composition, the total percent solids by weight (w/w %) amount in the composition ranges from 45% to 90%. Although usable for other purposes, the composition is usable as a fertilizer. Although makeable in other ways, the composition is makeable by mixing the ingredients with agitation sufficient enough to form an aqueous suspension.

The present invention concerns a process for producing a high purity phosphorus product from wastewater, by carrying to the process phosphate-containing wastewater that has been treated to remove biomass and other impurities, not including dissolved phosphates, creating floes using one or more iron, aluminium, magnesium or calcium salts, adding an alkali metal or alkaline earth metal hydroxide or oxide to the flocs in an amount effective to react the iron, aluminium, magnesium or calcium salt into the corresponding hydroxide, separating the hydroxide from the formed phosphate, and obtaining the high purity phosphorus product in a form of a liquid or solid phosphate salt.

A homogeneous fertilizer granule comprises slow-release (e.g. struvite) and fast release sources of phosphorus (P). The homogeneous fertilizer granule may further contain other essential nutrients and micronutrients required by plants. A number of methods may be used to make such granules. One method includes introducing a struvite slurry or fines and a liquid supply of water soluble P into a granulator. Alternatively, dry raw materials can be mixed with water/steam and/or another binder prior to being fed into a granulator. In another embodiment, pre-mixed dry raw materials are mechanically compacted and crushed to yield homogeneous fertilizer particles.

A homogeneous fertilizer granule comprises slow-release (e.g. struvite) and fast release sources of phosphorus (P). The homogeneous fertilizer granule may further contain other essential nutrients and micronutrients required by plants. A number of methods may be used to make such granules. One method includes introducing a struvite slurry or fines and a liquid supply of water soluble P into a granulator. Alternatively, dry raw materials can be mixed with water/steam and/or another binder prior to being fed into a granulator. In another embodiment, pre-mixed dry raw materials are mechanically compacted and crushed to yield homogeneous fertilizer particles.

The present invention relates to separation methods and systems for converting high concentrations of animal wastes into useful products, wherein the separation of the desired useful products is conducted with a cross-flow filtration system having the ability to the separate desired useful energy and/or products from both viscous and non-viscous medium.

The present invention relates to separation methods and systems for converting high concentrations of animal wastes into useful products, wherein the separation of the desired useful products is conducted with a cross-flow filtration system having the ability to the separate desired useful energy and/or products from both viscous and non-viscous medium.