At the beginning, the main indicators for the detection of polluted water are COD, ammonia nitrogen, total phosphorus, heavy metals and other conventional indicators, and the detection of biological toxicity is not extensive. Traditional physical and chemical analysis methods can quantitatively analyze the concentration level of a certain pollutant, but can not directly and fully reflect the comprehensive toxicity of various pollutants in water. Therefore, the monitoring of biological toxicity in water has been paid attention by relevant departments to make up for the shortcomings of physical and chemical monitoring in this respect.
With the development of The Times, the composition of wastewater discharged by chemical enterprises is more and more frequent and complex, and the level of biological toxicity will directly affect the survival of aquatic organisms in the discharged water body, and also affect the microbial community in the sewage treatment plant. When the concentration of pollutants in the polluted water reaches a certain level, it will cause biological toxic reactions, such as abnormal behavior, physiological dysfunction, histopathological changes, and even death.
The Modi WTox-8000 Online water Biotoxicity analyzer uses the ISO 11348 method to quickly and accurately test the toxicity of a sample based on the changes in the luminous intensity of the reaction of luminous bacteria (Vibrio Fischer) and the sample. The toxicity spectrum covers more than 5,000 potentially toxic substances. Luminescent bacteria will produce blue-green light during metabolism, and toxic substances in water will inhibit the normal metabolism of luminescent bacteria, resulting in reduced luminescence intensity. The more toxic it is, the less luminous it is. Compared with fish, flea and other aquatic biological detection methods, luminescence bacteria method has the advantages of high sensitivity, strong adaptability, good repeatability, fast measurement and low cost. It can respond to more than 5000 toxic substances, including toxic compounds, heavy metals, herbicides, detergents, etc., and is an ideal tool for evaluating comprehensive water pollution indicators.
The biological toxicity online analyzer can be applied to routine water quality online monitoring, industrial wastewater monitoring, environmental monitoring and chemical analysis, etc., to strengthen the monitoring of biological toxicity of water quality to ensure the life and health of the people.
