This product is a microecological preparation refined by introducing foreign strains, oriented induction cultivation, purification and rejuvenation, using domestic unique fermentation equipment and "bacteria + enzyme" treatment technology to cooperate and refined. Salt and nitrite have high treatment efficiency. It is a microecological agent developed for the sewage denitrification system. It is made up of microbial strains, biological enzymes and nutrients. It is mainly used to start, restart and upgrade the sewage treatment denitrification system. Biochemical efficiency.