Waste water treatment process in sebacic acid production

The invention relates to a waste water treatment process in sebacic acid production. The process comprises the following steps: adopting an extractant to extract phenol in waste water, separating the phenol-containing extracted solution and a raffinate, carrying out dephenolizing and reutilizing on the phenol-containing extracted solution, and discharging the raffinate, wherein DL-2-octanol is adopted as the extractant to extract the phenol-containing waste water in sebacic acid production in the extraction process. The process of the present invention has the following advantages that: 1, the phenol content in the sebacic acid production waste water is significantly reduced, and the waste water after the extraction can meet the discharge standard; 2, with the extractant DL-2-octanol, an internal circulation of the production system is realized; and 3, the DL-2-octanol is the by-product of the sebacic acid production process, such that advantages of easily available DL-2-octanol, low cost and low operation co