Application of the wastewater toxicity diagnosing technology based DO curve characteristics in treatment of dyeing wastewater

By cultivation of biofilm in the biological aerobic tank in the field to solve the problem that the diagnostic device of the toxic wastewater can not collect suspended activated sludge due to widespread use of contact oxidation process in dyeing wastewater treatment plant. Data obtained results from the running device is injected dyeing wastewater, including the integrity and reproducibility of DO (Dissolved Oxygen) curve, judgment of low load wastewater and diagnosis of toxic wastewater, are in line with the expected results, this show that the wastewater toxicity diagnosing technology and device based DO curve characteristics is suitable for dyeing wastewater treatment plants. It provide a practical technology and device for avoiding toxic substances against the biological treatment stage of dyeing wastewater treatment plant.