Patent ID: 7960171

Claim:
An equipment configured to cultivate anaerobic ammonium-oxidizing bacteria capable of denitrifying ammonium and nitrite substrates, the equipment comprising: a cultivation tank configured to cultivate the bacteria; an ammonium feed device configured to feed an ammonium substrate at a given concentration into the cultivation tank; a nitrite feed device configured to feed a nitrite substrate at a given concentration into the cultivation tank; and a control device configured to control a feed rate (Y) of each of the substrates after the bacteria enters a logarithmic growth phase to satisfy formula (I): Y=A ×exp( K×T ) (I) where: Y is a feed rate of the substrate, A is a concentration of the substrate at the start of cultivating, K is a feed constant of the substrate, and T is a number of cultivation days after onset of the logarithmic growth phase.