Fertilizer production
The present invention provides a fertilizer utilizing the inexpensive waste and by-product materials of biosolids, gypsum, and/or other phosphorus binding agents, such as iron or aluminum chemicals or by-products with elevated levels of iron and aluminum. The combination of biosolids, gypsum and other phosphorus binding agents, such as iron or aluminum chemicals or by-products with elevated levels of iron and aluminum produces a fertilizer that provides for soil nitrogen needs while limiting the availability of phosphorous to minimize environmental pollution.
1. A fertilizer comprising:
biosolids;
and a phosphorus binding agent selected from the group consisting of aluminum compounds and by-products containing aluminum.
2. The fertilizer of claim 1 , further including potassium adequate to achieve crop requirements when applied at a material rate equal to the agronomic need of the crop to be grown.
3. The fertilizer of claim 2 , wherein the potassium is in the form of potassium chloride (KCl).
4. A fertilizer comprising;
biosolids; and
a phosphorus binding agent, wherein the phosphorus agent is calcium sulfate dihydrate, and wherein the biosolids and calcium sulfate dihydrate are present in a ratio of about 1:2.
5. The fertilizer of claim 4 , further including potassium adequate to achieve crop requirements when applied at a material rate equal to the agronomic need of the crop to be grown.
6. The fertilizer of claim 5 , wherein the potassium is in the form of potassium chloride (KCl).