Technology for treatment of coking wastewater by means of plurality of biological enzymes

The invention provides a technology for the treatment of coking wastewater by means of a plurality of biological enzymes, comprising the following steps: introducing the coking wastewater into an anoxic tank for denitrification reaction; stirring to uniformly mix water quality and prevent activated sludge from sedimentation; adding compound ordinary biological enzymes into the anoxic tank; introducing water discharged from the anoxic tank for nitrification reaction; adding the compound ordinary biological enzymes and special enzymes into an aerobic tank; conveying the water discharged from the aerobic tank in two paths through sludge refluxing pumps, wherein the water in one path flows back to an anoxic segment for further removal of T-N, and the water in the other path is introduced into a membrane separating tank; and performing solid-liquid separation on liquid mixture in a manner of suction filtration through a water producing pump, wherein the activated sludge is intercepted in a biochemical system, and