The invention discloses a small short-
cut nitrification and
denitrification device for treating
livestock and poultry breeding
wastewater and a method. The method comprises the following steps: (1) the
livestock and poultry breeding
wastewater is pretreated during
domestication, so that CODcr is lower than 2000 mg / L, and
carbon to nitrogen ratio is not higher than 6.8; (2)
domestication comprisesthree stages in sequence, in the first stage, dissolved
oxygen is controlled at 2 mg / L during
aeration, and
aeration is performed for 8 hours and operates for 30 days; in the second stage, dissolved
oxygen is adjusted at 1 mg / L,
aeration is performed for 6 hours, mud is discharged once after operation for 30 days, and operation continues for another 30 days; (3)
domestication and official operation are conducted at
room temperature, during formal operation, aeration time can be automatically controlled according to change characteristics of dissolved
oxygen, that is, when the dissolved oxygenjump point is monitored, aeration is stopped, and the aerobic
nitrification procedure is terminated; and hypoxic agitation time can be automatically controlled according to pH change characteristics.With the operation method, biological treatment efficiency of
nitrogen in the
livestock and poultry breeding
wastewater can be effectively improved, rapid start of short-
cut nitrification of the livestock and poultry breeding wastewater at normal temperature is realized, and
energy consumption caused by aeration and heating in other short-
cut nitrification and
denitrification processes is reduced.