Research of wastewater treatment from non-destructive detection by “wet oxidation-biochemical process-intelligence oxidation”

Abstract

Abstract Non-destructive detection with colored-liquid was an effective detection method, which was widely used in non-destructive detection industry. High-concentration of wastewater with COD, color and surfactants would be produced in detection process. Through the biochemical treatment combined with wet oxidation, the COD dose would be reduced from 49200 mg/L to less than 100 mg/L. The color will be degraded from 5000 times to less than 40 times, which will match the requirements for reuse and discharge. Through the molecular distribution and bacteria toxicity test, wet oxidation reduced the inhibition rate of toxicity from 99.99% to 90.88%, which promoted the biochemical treatment performance. The average molecular weight of non-destructive wastewater was reduced obviously from 1486118 to 20376. In the end, the residual chlorine indicator was used to control dose of chlorine less than 3 mg/L to ensure that the color was less than 40 times and residual chlorine was not harmful to environment. The oxidation process was intelligence oxidation. The lab-scale experiment provided potential and available treatment process for non-destructive detection-wastewater.