Patent ID: 8709794

Claim:
A method of manufacturing a column reactor for producing nitrate nitrogen as an inorganic nutrient from an organic material, the method comprising: (i) filling a container with a carrier (A) having ventilation, said carrier (A) comprising one or more porous carriers selected from the group consisting of rockwool, vermiculite, pearlite, zeolite, sand, glass, ceramic, urethane, nylon, a melamine resin, cedar chips, bog moss, filter paper and agar; (ii) adding thereto microorganisms capable of conducting a multiple parallel mineralization by mineralization of an organic material to produce nitrate nitrogen; (iii) subsequently adding an organic material (B) in an amount of 0.01 to 20 g, in terms of dry weight, with respect to 1 L of the carrier, said organic material (B) comprising one or more organic materials selected from the group consisting of a fish-based soluble fertilizer, fish flour, an oil cake, raw garbage, corn steep liquor, rice bran, soybean flour, a plant residue, milk, powdered milk and livestock manure; and (iv) then leaving the resultant material at rest until nitrate nitrogen starts to be produced in an effluent during a washing of the carrier by an addition of water to discharge the effluent from the carrier; thereby obtaining a carrier on which the microorganisms capable of conducting a multiple parallel mineralization are immobilized.