Abstract: A soy sauce tank with circulation detection for amino acid nitrogen value control for soy sauce, comprising a tank body, a circulation tube arranged outside the tank body and having an output end and an input end respectively connected to the tank body, a circulation pump arranged in the circulation tube, and an amino acid nitrogen value detection apparatus arranged in the circulation tube. The soy sauce tank of the invention comprises a circulation detection loop, in which the amino acid nitrogen value detection apparatus is configured to measure the amino acid nitrogen value of the soy sauce. In the soy sauce tank the soy sauce is thoroughly mixed through multiple circulations, during which its amino acid nitrogen value is regulated and stabilized eventually, thereby facilitating automatic blending and improving the production efficiency of the soy sauce.

Abstract: A blending system for amino acid nitrogen value adjustment for soy sauce, comprising: a first soy-sauce tank configured to receive first extracted soy sauce and provided with a first circulation loop, and a second soy-sauce tank configured to receive second extracted soy sauce and provided with a second circulation loop; wherein, each of the first circulation loop and the second circulation loop is provided with an ammonia-nitrogen-value detection apparatus, and each of the first soy-sauce tank and the second soy-sauce tank is provided with an output tube with an output control valve connected to the amino acid nitrogen value detection apparatus, the output tubes of the first soy-sauce tank and the second soy-sauce tank are jointed and connected to a tube mixer. The blending system of the invention is fully-automatic and intelligent, resulting in improved production efficiency.