The invention relates to a
combined treatment method of 1,4-
butanediol production
wastewater, which comprises the following steps: carrying out physical and chemical pretreatment on
wastewater firstly so as to obtain pre-optimized
wastewater; improving the biodegradability of the wastewater and further reducing the COD (
chemical oxygen demand) concentration of the wastewater through an upflow
anaerobic reactor and an aerobic combined biochemical reaction tank; and after the muddy water separation of the wastewater is realized through a secondary
sedimentation tank, sequentially feeding the wastewater into a coagu-
flocculation reaction
settling pond and a
biological filter, carrying out deep treatment on the wastewater, removing substances such as tiny
suspended solids and colloids and the like in the wastewater through coagu-
flocculation reaction and
precipitation, and enabling discharged water to meet the requirements of one-class A standards in the
Discharge Standard of Pollutants for Municipal
Wastewater Treatment
Plant (GB18918-2002) through the synergistic effect of adsorption and
biodegradation of the
biological filter. The method disclosed by the invention not only has a stable removal effect on COD in 1,4-
butanediol production wastewater, but also can effectively
resist violent water impacts; and the method has the characteristics of rapid
system startup and the like. The method disclosed by the invention also can be applied to the treatment of other high-concentration toxic degradation-resistant organic wastewater with a
water quality similar to that of 1,4-
butanediol production wastewater.