Abstract: A nitrifying bacteria formulation that can cause a sufficient nitrification reaction even in a high ionic concentration (salt concentration), and efficiently collect high-concentration nitrate-form nitrogen from ammonia produced in animal husbandry facilities, composting facilities, sewage treatment plants, etc.; and a method for culturing bacteria to be contained in the nitrifying bacteria formulation. A nitrifying bacteria formulation includes: ammonia-oxidizing bacteria and nitrite-oxidizing bacteria, wherein the ammonia-oxidizing bacteria include bacteria belonging to the Nitrosococcus, the proportion of the number of the bacteria belonging to the Nitrosococcus with respect to the total number of bacteria in the nitrifying bacteria formulation is at least 0.1%, and the proportion of the number of the nitrite-oxidizing bacteria with respect to the total number of bacteria in the nitrifying bacteria formulation is at least 0.1%.

Abstract: An adsorbent for phosphoric acid-based anionic substances, that contains foamed glass, and that has a Ca2p concentration of 7.5 atom % or more or a Na1s concentration of 5.0 atom % or less at the surface thereof as measured by XPS analysis, and a half-width of Si2p peak of 2.4 eV or more. The adsorbent can also have a specific surface area of 45 m2/g or more or a pore volume of 2.5 cm3/g or more as measured by mercury intrusion.

Abstract: This nitrogen recovery method is for causing nitrifying bacteria to decompose an ammonia component in an ammonia-containing gas, and recovering a nitrogen component contained in ammonia as an ammonia gas decomposition product, involving: supplying circulating water to a microorganism decomposition tank retaining a nitrifying bacterium carrier carrying nitrifying bacteria to maintain the carrier wet; passing ammonia-containing gas through the carrier in the wet state in an oxygen-containing atmosphere; dissolving an ammonia component in the ammonia-containing gas in the circulating water, together with an ammonia gas decomposition product produced by the nitrifying bacteria, to continue decomposing the ammonia-containing gas while the decomposition product is accumulated in the circulating water; and collecting all or a portion of the circulating water to recover the ammonia gas decomposition product, when the concentration of nitrate ion as an ammonia decomposition product in the circulating water reaches a p

Abstract: An adsorbent for phosphoric acid-based anionic substances, that contains foamed glass, and that has a Ca2p concentration of 7.5 atom % or more or a Na1s concentration of 5.0 atom % or less at the surface thereof as measured by XPS analysis, and a half-width of Si2p peak of 2.4 eV or more. The adsorbent can also have a specific surface area of 45 m2/g or more or a pore volume of 2.5 cm3/g or more as measured by mercury intrusion.

Abstract: An anionic substance-adsorbing agent having an excellent ability to adsorb anionic substances; a method for producing the anionic substance-adsorbing agent; an apparatus for producing the anionic substance-adsorbing agent; and a method for recovering anionic substances. The present invention pertains to an anionic substance-adsorbing agent which contains foam glass, wherein, as determined by XPS analysis, the concentration of Ca2P is at least 4.0 at % or the concentration of Na1s is at most 8.0 at % on the surface of the adsorbing agent, and the full width at half maximum of the Si2p peak is at least 2.4 eV. The adsorbing agent can have a specific surface area of 15 m2/g or greater or a pore volume of 1.7 cm3/g or greater as measured by mercury intrusion porosimetry.