On-line water inlet toxicity detection device for sewage treatment plant

Abstract

The invention discloses a water inlet toxicity detection device for a sewage treatment plant. The device comprises a reaction tank body, a reaction tank cover and a dissolved oxygen (DO) electrode, wherein the reaction tank cover is buckled above the reaction tank; the dissolved oxygen DO electrode penetrates through the reaction tank cover to be inserted into the reaction tank; a sludge peristaltic pump is connected to the reaction tank and a sludge tank through a pipeline; a water sample peristaltic pump is connected to the reaction tank and a water sample tank through a pipeline; a micro air pump is connected to the reaction tank and an air filter through a pipeline; a nutrient solution peristaltic pump and a cleaning fluid peristaltic pump are respectively connected to a nutrient solution bottle and a cleaning fluid bottle through pipelines; an emptying peristaltic pump is connected to a waste liquid barrel through a pipeline; and a stirring device is arranged below the reaction tank body. The device has the characteristics of being easy to operate, convenient to maintain, high in automation degree, flexible in configuration and the like, and can be applied to practical on-linemonitoring of the water inlet quality of the sewage plant.

Description

technical field [0001] The invention relates to a detection device and a detection method for influent toxicity of a sewage treatment plant. On the basis of real-time monitoring of the respiration rate (OUR) of the activated sludge in the secondary sedimentation tank of the sewage treatment plant, the impact of the influent water quality on the activity of the eutrophic microorganisms in the activated sludge is judged, so that the toxicity of the influent water quality is based on real-time early warning, which belongs to the environment Monitoring technical field. Background technique [0002] At present, the most widely used technology in the field of sewage treatment is the activated sludge method, which uses the metabolism of microorganisms in activated sludge to transform and degrade pollutants in wastewater. However, the increasing amount of industrial wastewater has caused huge pollution to the water environment, and at the same time, a large number of toxic substanc...

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Problems solved by technology

However, the current research mostly adopts the continuous culture measurement system, and the main problems include: ① There are two dissolved oxygen electrodes in the system, which are placed at the inlet and outlet ends of the reactor, and there are systematic errors between the electrodes; ② The system can only It is impossible to evaluate the absolute toxicity of water samples by measuring the change of influent toxicity caused by sudden changes in water quality, that is, the system cannot measure it when the sample has a stable toxicity; ③The system is relatively complex, and each unit in the system requires precise control of parameters to obtain ideal result

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