Identification method of poisonous substances in water from urban domestic wastewater treatment plant
A technology for domestic sewage and toxic substances, applied in the direction of testing water, color/spectral characteristic measurement, measuring devices, etc., can solve problems such as poisoning and production failure, and achieve the effects of fast reproduction, low cost and short life cycle
Inactive Publication Date: 2014-04-30
广州市净水有限公司
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Problems solved by technology
Microbial poisoning incidents in the biological treatment system often occur in sewage treatment plants, and a large amount of "dead sludge" and biological foam appear in the biological reaction tank, resulting in the entire reaction and aeration tank section being covered by floating sludge, making normal production impossible
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Embodiment 1
[0035] Cultivation of Daphnia magna: The Daphnia magna used in this experiment was provided by the South China Environmental Research Institute of the Ministry of Environmental Protection, referring to the published literature "Study on the Acute Toxicity of Sodium Hypochlorite, Surfactant, and Phenol to Daphnia magna", Guangdong Chemical Industry, 2012 Issue 18, Volume 39.
[0036] 1) Water sample collection: When collecting sewage samples, the sampling bottle should be filled with water samples without leaving air; the test should be carried out immediately after sample collection; for toxicity testing, sewage samples can be diluted with dilution water to make test solutions of different concentrations.
[0037] 2) Daphnia magna as a toxicity test organism
[0038] reproduction of daphnia magna;
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Abstract
The invention discloses an identification method of poisonous substances in water from an urban domestic wastewater treatment plant, and belongs to the field of wastewater treatment. The identification method provided by the invention comprises the following steps of (1) carrying out acute toxicity biological detection by adopting daphnia magna so as to detect the toxicity of the wastewater; (2) detecting the suspected toxic substances in the wastewater; and (3) determining the main toxic substances in the wastewater, namely carrying out nitrogen blow-off treatment for 2h, carrying out nitrogen blow-off treatment for 2h after regulating the pH to 6, and regulating the pH to 6 for carrying out nitrogen blow-off treatment for 2h and then regulating the pH to 8.5, therefore, the main toxic substances, causing microbiological poisoning incidents of a biotreatment system, in the wastewater can be determined by detecting the change of the semilethal rate 24h-LC50 of the daphnia magna in a water sample after the three treating steps are performed and by adding the suspected toxic substances. The identification method of the poisonous substances in water from the urban domestic wastewater treatment plant provided by the invention has the advantages that the cost is low, and the period is short.
Description
technical field [0001] The invention belongs to the field of sewage treatment, in particular to a method for identifying toxic substances in incoming water of urban domestic sewage treatment plants. Background technique [0002] With the advancement of science and technology, the rapid development of industrial and agricultural production, and the continuous advancement of urbanization, the discharge of sewage and sewage generated by people's production and life has increased rapidly, and the types of pollutants have increased significantly, resulting in increasingly serious pollution loads on the water environment. Water pollution is becoming more and more complex. When monitoring and analyzing pollutants in water, in addition to the analysis of traditional physical and chemical parameters of water quality, it is also necessary to consider the impact of harmful substances or toxic substances on the water environment. At present, my country's environmental protection departm...
Claims
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IPC IPC(8): G01N33/18G01N30/02G01N21/33
Inventor 伍志趼江秀贤张可方荣宏伟黄小鹏
Owner 广州市净水有限公司
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