CONTINUOUS AND EARLY DETECTION OF TOXICITY IN INDUSTRIAL WASTE-WATER USING AN ONLINE RESPIRATION METER

An on-line toxic detection system is introduced for early and continuo us observation of toxicity in an industrial wastewater treatment plant . The system consists of a contact chamber and an on-line respiration meter. If a raw wastewater sample is taken at the head of the wastewat er treatment plant, one can detect toxicity of the wastewater before i t reaches the aeration tank. For proper usage of this system a maximum respiration rate should be measured in the contact chamber. To apply this system on the petrochemical wastewater the Q(a)/Q(s) ratio should be maintained higher than 0.6 among other operating conditions requir ed When this system was tested under high and low pH, Co2+ inhibition, and recovered catalyst wastes addition, the system responded very sen sitively.