The present disclosure relates to a method for preparing an unbleached biomechanical pulp from straws and full utilization of by-products, which belongs to the technical field of papermaking technology and waste comprehensive utilization. In the present disclosure, straw as raw material for pulping is treated with steam, then a small amount of KOH is added, the straw is softened by hydrothermal saturation, then the temperature of the straw is adjusted, alkaline compound enzymes are added for biological treatment, and finally the straw is refined, where the prepared mechanical pulp can meet the requirements of producing unbleached packaging paper and paper-based materials. At the same time, the by-products are recycled to prepare biomass compound fertilizer, which turns solid waste into treasure and realizes the high-value full utilization of wheat straw. Therefore, it has good practical application value and broad application prospects.

The present invention relates to a method of preparing a wood chip-type organic composite fertilizer wherein the method comprises the steps of: {circle around (a)} preparing wood chips by chipping; {circle around (b)} preparing a liquid organic fertilizer; {circle around (c)} forming an organic mixed solution; {circle around (d)} obtaining colored wood chips by simultaneously immersing the wood chips of the step {circle around (a)} in the organic mixed solution of the step {circle around (c)} and applying hot air to the organic mixed solution to coat the woods chips with colors; {circle around (e)} drying the wood chips to a high temperature to remove moisture formed on an outer surface of the wood chips of the step {circle around (d)} and to make the organic mixed solution penetrate evenly into the wood chips at the same time; and {circle around (f)} packing the dried wood chips of the step {circle around (e)} by weight unit with the measurement thereof on a scale.

The present invention relates to a method of preparing a wood chip-type organic composite fertilizer wherein the method comprises the steps of: {circle around (a)} preparing wood chips by chipping; {circle around (b)} preparing a liquid organic fertilizer; {circle around (c)} forming an organic mixed solution; {circle around (d)} obtaining colored wood chips by simultaneously immersing the wood chips of the step {circle around (a)} in the organic mixed solution of the step {circle around (c)} and applying hot air to the organic mixed solution to coat the woods chips with colors; {circle around (e)} drying the wood chips to a high temperature to remove moisture formed on an outer surface of the wood chips of the step {circle around (d)} and to make the organic mixed solution penetrate evenly into the wood chips at the same time; and {circle around (f)} packing the dried wood chips of the step {circle around (e)} by weight unit with the measurement thereof on a scale.

An injection molded fertilizer product that is infrangible and sturdy and that dissolves over a predictable and extended time period. The product includes corn gluten meal and magnesium oxide, and may be prepared by injection molding, with the corn gluten meal and magnesium oxide being injection molded at a pressure between 15,000 PSI and 27,000 PSI and at an injection temperature between 140° F. and 200° F.

In various embodiments, the present disclosure provides composting materials and methods of making the same.

The disclosure relates to a treatment method for sludge utilization in a sewage treatment plant, in particular to a method for reducing heavy metal content of sludge-based biocoke. The disclosure includes following steps (1) to (5): step (1): concentrating a residual sludge produced by a municipal sewage treatment plant to be with a moisture content of 95-98%; step (2): conditioning the concentrated sludge in a sludge bioleaching tank for 48 hours, with a pH value of the sludge being reduced to below 4.5; step (3): pumping the conditioned sludge into a high-pressure diaphragm plate and frame for a press filter dewatering to obtain a dewatered cake with a moisture content less than or equal to 50%; step (4): delivering the dewatered cake into a sludge dryer for crushing, heating and drying to obtain the dried sludge with a moisture content of 15-22%; and step (5): carbonizing the dried sludge into sludge-based biocoke at a high temperature in a pyrolytic carbonization device with a carbonization temperature of 500-650.

A mineral organic fertilizer composition obtained by a process comprising the following steps performed homogeneously mix having a specific predetermined percentage (%) by weight relative to the total weight of the mineral organic fertilizer composition, specifically homogeneously mix a coal slag composition, the micronutrient solution with the manure composition to form a homogeneous mixture, in which, the homogeneous mixture is added with microbiological composition; composting the homogeneous mixture to form a foundation mixture; homogeneously mix the foundation mixture with the different mixing components comprising an NPK fertilizer and a mixture of micronutrient solutions and microbiological composition having a predetermined percentage (%) weight, and then drying or centrifuged.

A composition for weed control and fertilizer comprising iron hydroxyl ethylenediaminetriacetic acid, humate, microelements, soy hydrolysate, calcium lignin, a natural-based wetting agent, molasses desurgarized solubles, and water, and may further comprise glycerin and/or preservatives, are provided. Methods for weed control and fertilization of plants comprising the steps of providing a composition comprising an effective amount of iron hydroxyl ethylenediaminetriacetic acid, humate, microelements, soy hydrolysate, calcium lignin, a natural-based wetting agent, and molasses desurgarized solubles, and applying an effective amount of the composition to soil or a plant or a weed, are also provided.

A composition for weed control and fertilizer comprising iron hydroxyl ethylenediaminetriacetic acid, humate, microelements, soy hydrolysate, calcium lignin, a natural-based wetting agent, molasses desurgarized solubles, and water, and may further comprise glycerin and/or preservatives, are provided. Methods for weed control and fertilization of plants comprising the steps of providing a composition comprising an effective amount of iron hydroxyl ethylenediaminetriacetic acid, humate, microelements, soy hydrolysate, calcium lignin, a natural-based wetting agent, and molasses desurgarized solubles, and applying an effective amount of the composition to soil or a plant or a weed, are also provided.

A concentrated aqueous suspension of microfibrillated cellulose (MFC) comprising salts for plant nutrition, the concentrated aqueous suspension comprises microfibrillated linear polymers of D-glucose molecules homogenized through a fibrillation process (cellulose microfibers), calcium ions, sulfate ions and other substances for plant nutrition, being the concentration of calcium ions and sulfate ions in excess of the concentration corresponding to the solubility of calcium sulfate in water and being the proportion of microfibrillated cellulose (MFC) within a range of 1% and 99% w/w of the suspension.