Method and device for preliminary evaluation of dead fish accident in heavy metal wastewater
A heavy metal and sewage technology, applied in the direction of testing water, material inspection products, etc., can solve the problem that it is difficult to find screening indicators, and achieve the effect of avoiding additional identification costs
Active Publication Date: 2015-08-05
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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Therefore, it is very important to investigate the cause of the accident by empirical inquiry and the procedure of on-site inspection in the accident identification of dead fish in sewage, which has important screening significance for the next detection index. It is difficult to find specific screening indicators for poisonous sewage dead fish accidents
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[0017] The present invention will be further described below in conjunction with specific drawings and embodiments.
[0018] As shown in the figure, the embodiment provides a device for preliminary identification of dead fish accidents in heavy metal sewage, which mainly includes a pretreatment system and a biological testing system; the pretreatment system includes a pretreatment container 2, and the pretreatment container 2 is provided with a first partition 3, and the first partition 3 divides the inner space of the pretreatment container 2 into two parts, and the part above the first partition 3 is an exchange treatment chamber 2a, and the exchange treatment The chamber 2a is used to fill the ion exchange resin for removing heavy metals in the wastewater. The upper part of the exchange treatment chamber 2a is provided with a water outlet; the part under the first partition 3 is the pre-treatment water inlet chamber 2b, and the pre-treatment water inlet chamber 2b communica...
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The invention relates to a method for preliminary evaluation of a dead fish accident in heavy metal wastewater. The method is characterized by comprising the following steps: pretreatment, namely arranging an experimental group and a control group, removing heavy metals in the wastewater by use of ion exchange resin, placing a biological testing container in the experimental group, and directly placing wastewater by another biological testing container without treatment in the control group; biological testing, namely feeding a plurality of testing living bodies in two biological testing containers, and observing the death rate of the testing living bodies in the two biological testing containers after the testing living bodies are fed for an appropriate time period; and evaluation, namely analyzing the death status of the testing living bodies in the experimental group and the control group and judging the wastewater pollution level. The invention also provides a device for the preliminary evaluation of the dead fish accident in the heavy metal wastewater. Based on the method, the device comprises a pretreatment system and a biological testing system. According to the method and the device, whether the dead fish accident is caused by heavy metal pollution can be simply and clearly judged and the additional evaluation cost caused by blind screening can be effectively avoided.
Description
technical field [0001] The invention relates to a method and device for preliminary identification of dead fish accidents in heavy metal sewage, and belongs to the field of fishery ecological environment research in the discipline of aquatic products. Background technique [0002] At present, with the rapid development of my country's economy, the total amount of industrial and agricultural production is constantly increasing, and its negative environmental effects are also constantly reflected, mainly manifested in the pollution and destruction of the water environment. In the past ten years, such pollution incidents have been continuously reported, for example, the cadmium pollution incident in Longjiang, Guangxi, and the Zijin Mining incident in Fujian, all of which have had serious negative impacts on nature, economy, and society. Pollution not only affects the drinking water safety of residents, but also seriously threatens the natural ecosystem with various aquatic org...
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Inventor 宋超胡庚东范立民孟顺龙裘丽萍郑尧陈家长
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI