摘要:
Method for reclaiming excavations following the exploitation of resources for road engineering characterized by dewatering the fermented sewage sludge from municipal wastewater treatment plants to at least 20% of dry mass and mixing it with ash from biomass combustion and coalassociated shales obtained from bituminous coal mining in the weight ratio of 3 : 2 : 10. The resulting mixture is used for filling the top layer of excavation, with the thickness of 0.5-2.5m, depending on the vegetation.
摘要:
A novel phosphatic/potash compound fertilizer and a method of producing the same are provided for improving the solubility of phosphate components contained in an incinerated ash residue of chicken droppings for efficient utilization of the ash residue, with the alkalis of the lime component origin being neutralized. Thus, at least one powder selected from among a basic potassium compound powder and a water-granulated blast furnace slag powder is admixed with an incinerated ash residue of chicken droppings, a mineral acid is added to the mixture and reactions are allowed to proceed to maintain the reaction system at a high temperature by utilizing the heat of neutralization generated by the reaction between the basic potassium compound and/or water-granulated blast furnace slag powder and the mineral acid thereby convert hardly soluble phosphatic components contained in the incinerated chicken dropping ash residue to effective components improved in solubility, while maintaining the reaction mixture at about neutrality or weak acidity
摘要:
A novel phosphatic/potash compound fertilizer and a method of producing the same are provided for improving the solubility of phosphate components contained in an incinerated ash residue of chicken droppings for efficient utilization of the ash residue, with the alkalis of the lime component origin being neutralized. Thus, at least one powder selected from among a basic potassium compound powder and a water-granulated blast furnace slag powder is admixed with an incinerated ash residue of chicken droppings, a mineral acid is added to the mixture and reactions are allowed to proceed to maintain the reaction system at a high temperature by utilizing the heat of neutralization generated by the reaction between the basic potassium compound and/or water-granulated blast furnace slag powder and the mineral acid thereby convert hardly soluble phosphatic components contained in the incinerated chicken dropping ash residue to effective components improved in solubility, while maintaining the reaction mixture at about neutrality or weak acidity
摘要:
A method for vegetating ground which is sterile or impoverished by overexploitation, for example, involves spreading simultaneously on the ground a mixture of at least: a humifiable substance to which is added at least one organic nitrogen containing substance for fermenting said humifiable substance; an unfermented plant meal rich in trace elements needed to prevent deficiencies; microorganisms and bacteria. These substances are packed separately and mixed at the time of their application. This method allows a complex biological structure to be re-established quickly and naturally in the ground with flora and fauna close to those found in undisturbed ground.
摘要:
Provided is a raw material for phosphate fertilizer having excellent fertilizer characteristics, which raw material consists essentially of a slag containing phosphate generated from dephosphorization reaction in molten iron, and is a method for manufacturing the raw material suitable for manufacturing the phosphate fertilizer. The raw material for phosphate fertilizer consists essentially of a slag containing phosphate generated from dephosphorization reaction in molten iron. As for the slag composition, the phosphate content satisfies the formula (1), and preferably the formula (2): [P 2 O 5 ] ≧ 5.6 x [F] + 7 [P 2 O 5 ] ≧ 5.6 x [F] + 10 where, [P 2 O 5 ] is the phosphate content in slag, (mass%), and [F] is the fluorine content in slag, (mass%). The method for manufacturing the raw material thereof is a method of charging an oxygen source and a CaO source to a molten iron which decreases the Si concentration therein to a sufficient level, thus inducing the dephosphorization reaction in the molten iron, or a method of charging a CaO source and a gas oxygen in respective specified configurations and conditions to the molten iron, thus inducing the dephosphorization reaction in the molten iron.
摘要:
Als anorganische Sekundärrohstoffe mit hohem Gehalt an Oxiden, Hydroxiden, Carbonaten und/oder Silikaten des Calciums und/oder Magnesiums und/oder Kaliums werden überwiegend basisch wirksame Rückstände aus industriellen und/oder gewerblichen Prozessen verwendet. Eine gezielte Anreicherung mit organischen Sekundärrohstoffen, aber auch mit Micronährstoffen ist möglich. Alle Ausgangsstoffe können entweder gemeinsam oder zunächst in Unterkombination vorgemischt und schließlich in eine lager-, transport-, umschlag- und ausbringstabile Endform überführt werden. Geeignete Endformen sind Granulate, Kompaktate und Pellets, aber auch Suspensionen, da diese besonders exakt dosiert und gleichmäßig ausgebracht werden können.
摘要:
Als anorganische Sekundärrohstoffe mit hohem Gehalt an Oxiden, Hydroxiden, Carbonaten und/oder Silikaten des Calciums und/oder Magnesiums und/oder Kaliums werden überwiegend basisch wirksame Rückstände aus industriellen und/oder gewerblichen Prozessen verwendet. Eine gezielte Anreicherung mit organischen Sekundärrohstoffen, aber auch mit Micronährstoffen ist möglich. Alle Ausgangsstoffe können entweder gemeinsam oder zunächst in Unterkombination vorgemischt und schließlich in eine lager-, transport-, umschlag- und ausbringstabile Endform überführt werden. Geeignete Endformen sind Granulate, Kompaktate und Pellets, aber auch Suspensionen, da diese besonders exakt dosiert und gleichmäßig ausgebracht werden können.
摘要:
[PROBLEM] To recover phosphorus accumulated in a sewage-treatment plant or the like at a low cost in such a manner as to facilitate the utilization of the thus recovered phosphorus. To efficiently utilize the recovered phosphorus as a fertilizer. [SOLUTION] Phosphorus in waste water, which is a phosphorus source, is adsorbed by a phosphorus recovery material formed of an amorphous calcium silicate-based material and thus recovered. After adding the phosphorus recovery material to the waste water that is a phosphorus source, it is preferred to adjust the pH value of the waste water to 7.0 or higher. Also, it is preferred that the waste water that is a phosphorus source is decarbonated by reducing the pH value thereof to 6.0 or lower and then the phosphorus recovery material is added. As the phosphorus recovery material, an aggregate of an amorphous calcium silicate hydrate and Ca(OH) 2 and having a Ca/Si molar ratio of 0.8-20 inclusive is preferred. The aggregate may be obtained by solid-liquid separation and drying. Alternatively, a slurry or paste containing the aggregate may be used. The recovered phosphorus recovery material can be used as a fertilizer.