Online detection device and method for toxicity of inlet water of sewage treatment plant

Abstract

The invention discloses an online detection device and method for the toxicity of inflow water of a sewage treatment plant. The device comprises an inflow water quantitative sampling assembly, a sludge quantitative sampling assembly, a main reaction assembly, a water bath heating assembly and a controller, the inflow water quantitative sampling assembly and the sludge quantitative sampling assembly are respectively connected with the main reaction assembly; and the water bath heating assembly is used for heating the inlet water quantitative sampling assembly, the sludge quantitative sampling assembly and the main reaction assembly, and the controller is in communication connection with the inlet water quantitative sampling assembly, the sludge quantitative sampling assembly, the main reaction assembly and the water bath heating assembly. The device can stably, simply, conveniently and sensitively detect the toxicity of the inlet water of the sewage treatment plant on line, and can quickly monitor and early warn the toxicity of the inlet water of the sewage treatment plant, so that the sewage treatment plant can take emergency measures when toxic and harmful conditions suddenly occur, and the safe and stable operation of the sewage treatment plant is effectively ensured.

Description

technical field [0001] The invention belongs to the technical field of sewage detection, and in particular relates to an on-line detection device and method for influent toxicity of a sewage treatment plant. Background technique [0002] At present, the vast majority of sewage treatment plants in my country use the activated sludge method to treat sewage. The activated sludge method uses the physiological metabolic activities of microorganisms in the activated sludge to remove pollutants in the wastewater. At present, the system operation status is mainly evaluated by the system effluent water quality and operation experience. The effluent evaluation has a lag (the HRT of the sewage plant is about 20h), and once the effluent exceeds the standard, only high-cost advanced treatment can be used. The more unfavorable situation is: the influent water contains PPCP and other toxic substances, the biological system collapses, and it takes several weeks for the system to restart, c...

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Problems solved by technology

[0005] However, imported equipment is bulky, costly, and complicated to operate; domestically developed instruments have a low degree of automation

Moreover, the use of microbial preparations needs to be activated, and the microbial activity cannot be kept constant, both of which are difficult to meet the needs of in-situ online detection of water quality toxicity

In addition, the activity of luminescent bacteria is short at room temperature, which also limits the application of luminescent bacteria in the online detection of water quality toxicity.

[0006] Microbial preparations cannot fully reflect the toxicity of sewage plant influent, mainly in the following aspects: toxic substances that can affect the microbial activity of bacterial preparations may have limited effects on activated sludge, and toxic substances that have a greater impact on sludge activity may not cause microbial contamination. Significant changes in bacterial preparations

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