9 results about "Bone char" patented technology

The application relates to the technical field of soil remediation, and particularly discloses a composite soil remediation agent, a preparation method and application thereof.A composite soil remediation agent comprises modified calcined oyster shell, plant biomass carbon, bone charcoal, compost, microbial preparation and ferrous sulfide; the preparation of the modified calcined oyster shell comprises the following steps: crushing, calcining oyster shell, and then adding a modified solution prepared from urea, rhamnolipid, iminodisuccinic acid tetrasodium and sodium dodecylbenzenesulfonate to modify the calcined oyster shell, so that the modified calcined oyster shell is obtained.The composite soil remediation agent can effectively adsorb and fix heavy metals in slightly heavy metal contaminated soil, reduce the mobility and bioavailability of the heavy metals, and thus reduce the harm of the heavy metals to soil and crops.

The invention discloses a method for converting phosphorus in bone black into soluble phosphorus by adopting penicillium desert, and belongs to the technical field of waste conversion and utilization. According to the method, the indissolvable phosphorus in the bone black is efficiently and stably converted into the soluble phosphorus by utilizing the specifically preserved Penicillium desertorum, the phosphorus dissolving amount within 10 days is up to 2187.50 mg / L, the process is environment-friendly, the raw material adaptability is high, and a feasible microbial conversion way is provided for high-valued utilization of bone black phosphorus resources.

The invention belongs to the technical field of ceramic materials, and particularly relates to pearl porcelain based on pearl microelement coloring and a preparation method of the pearl porcelain. The colored pearl porcelain based on pearl trace elements is prepared from the following raw materials in percentage by mass: 25%-33% of natural colored pearl powder, 16%-24% of synthetic bone black, 16%-20% of Longyan soil, 10%-14% of Datong soil, 8%-10% of potassium feldspar, 6%-8% of quartz and 4%-6% of calcined talc. The natural colored pearl powder contains zinc, strontium, copper, chromium, cobalt and other trace elements. According to the preparation method of the pearl porcelain based on pearl microelement coloring, provided by the invention, the natural colored pearls are added into the formula of the ceramic body, and unique color and luster which are healthy, environment-friendly and rich in cultural connotation are created on the ceramic body by utilizing the inherent microelements of the pearls and through a high-temperature furnace transmutation firing process. The pearl-like optical appearance is realized.

This invention discloses a simultaneous nitrogen and phosphorus removal system for constructed wetlands based on a sulfur-bone char-limestone-ceramsite composite packing material and its application method. It relates to the fields of wastewater ecological treatment and constructed wetland enhancement. This invention constructs a quaternary composite packing material system of sulfur-bone char-limestone-ceramsite, integrating three mechanisms: autotrophic denitrification, heterotrophic denitrification, and crystallization precipitation, to achieve efficient simultaneous removal of nitrogen and phosphorus from wastewater. In an anaerobic environment, sulfur acts as an electron donor to drive autotrophic denitrification, eliminating the need for an external carbon source. Hydroxyapatite in the bone char induces phosphorus formation and precipitation for phosphorus removal, and its residual organic matter further enhances heterotrophic denitrification. Ceramsite provides biofilm attachment sites to ensure synergistic reactions. Limestone replenishes alkalinity, neutralizes acidic substances, stabilizes the substrate pH to suit microbial activity, and optimizes packing porosity and hydraulic mass transfer efficiency. Furthermore, molten sulfur acts as a binder to prevent bone char pulverization and loss, improving packing stability and extending system operating cycles.

The utility model belongs to the technical field of wastewater treatment, and particularly relates to a high-density sedimentation tank for removing fluorine and heavy metals, which comprises a high-density sedimentation tank, a dosing tank is fixedly mounted on the left side of the high-density sedimentation tank, an adsorption tank is fixedly mounted on the right side of the high-density sedimentation tank, calcium salt, sodium carbonate and a PAM (polyacrylamide) flocculant are added into the dosing tank, and the adsorption tank is fixedly mounted on the right side of the high-density sedimentation tank. After being stirred and mixed by the mixing assembly, the wastewater enters the high-density sedimentation tank and begins to settle, one part of sludge generated by sedimentation is sent back to the dosing tank by the sludge return pump, the most part of the sludge is discharged by the sludge discharge pump, and the sludge scraping assembly is installed to avoid sludge accumulation; according to the high-density sedimentation tank, residual fluorine ions and heavy metals in wastewater are continuously treated by adding adsorbents such as activated aluminum oxide, bone black and zeolite, after the adsorbents are saturated in adsorption, materials are rapidly changed through the material changing assembly, and the high-density sedimentation tank improves the treatment effect on large-scale fluorine and heavy metals by combining a chemical precipitation method and an adsorption method.

A method of manufacturing a bone char absorbent includes the following steps. A drying step is performed on an initial bone material to form dried bone material. A torrefaction step or a co-torrefaction step is performed on the dried bone material to form torrefied bone material or a co-torrefied mixture, in which the torrefaction step and the co-torrefaction are performed at a heating rate of 10° C. / min to 20° C. / min to a torrefied temperature or a co-torrefied temperature of 175° C. to 300° C. for 15 minutes to 60 minutes. A cooling step is performed on the torrefied bone powders or the co-torrefied mixture to form the bone char absorbent. The mineral phase of the bone char absorbent includes carbonated hydroxyapatite, thereby enhancing the adsorption capacity for trivalent arsenic ions.

The application discloses a preparation method and application of a heavy metal adsorbent, and belongs to the field of waste resource utilization and water treatment technology. The preparation method comprises the following steps: preparing bone charcoal by taking animal bones as raw materials, modifying the bone charcoal by using a surfactant to prepare modified bone charcoal, and loading magnetic nano-particles on the modified bone charcoal to obtain a magnetic biological adsorbent capable of effectively removing heavy metal ions in sewage. The prepared adsorbent has good adsorption performance and biodegradability, does not cause secondary pollution to the environment, greatly reduces the harm of heavy metal ions in sewage, and the magnetism of the adsorbent itself is beneficial to the collection and recycling of the adsorbent, and the utilization rate of the material is improved.

The application relates to the technical field of agricultural fertilizers, and discloses a method for activating peanut phosphorus and increasing yield by pig bone micro-nano bone charcoal, which applies pig bone micro-nano bone charcoal particles made of defatted pig bone source bone charcoal and potassium fulvate dispersion solution. The potassium fulvate on the surface of the particles can construct a negative charge barrier to inhibit the secondary agglomeration of bone charcoal caused by calcium ion bridging. When applied, the above particles are used as base fertilizer, seed coating or combined with fine sand to be applied into selected plots in a positioning hole, the synergistic effect of the potassium fulvate coating layer on the surface of the bone charcoal and the exogenous organic acid is utilized to drive the bone charcoal to occur a heterogeneous acidolysis reaction to activate phosphorus; and water management in the growth period is combined to induce the peanut root system to grow in the bone charcoal fertilization area. The application solves the problems that the bone charcoal is easily agglomerated and passivated in a complex soil environment and internal phosphorus release is slow, improves the absorption and utilization efficiency of phosphorus, and promotes the yield increase of peanuts.

The invention discloses a method for converting phosphorus in bone black into soluble phosphorus by adopting penicillium fimbriatum, and belongs to the technical field of waste conversion and utilization. According to the method disclosed by the invention, the insoluble phosphorus in the bone black is efficiently and stably converted into the soluble phosphorus by utilizing the specifically preserved Penicillium seckii, the phosphorus dissolving amount within 10 days is up to 1616.71 mg / L, the process is environment-friendly, the raw material adaptability is high, and a feasible microbial conversion way is provided for high-valued utilization of bone black phosphorus resources.