Measuring device and method for measuring biomass of cyanobacteria in water bloom

Abstract

The invention discloses a device and a method for measuring the biomass of bloom-forming cyanobacteria. The device for measuring the biomass of the bloom-forming cyanobacteria comprises a sample accommodating bottle and a measuring tube, wherein a first accommodating cavity for accommodating a to-be-measured water sample is arranged in the sample accommodating bottle, and the upper end of the first accommodating cavity is open; the lower end of the measuring tube and the upper end of the sample accommodating bottle are connected and in mutual sleeving arrangement, a second accommodating cavity is formed in the measuring tube, the lower end of the second accommodating cavity is open, a liquid inlet is formed in the wall of the second accommodating cavity, and scale line groups are arranged on the peripheral walls of the second accommodating cavity. According to the embodiment of the invention, the device for measuring the biomass of the bloom-forming cyanobacteria has the advantages of simple structure, portability, applicability to field use, low manufacture cost, low measurement cost, convenience in use and operation, high measurement speed, short measurement time, accurate measurement result and the like.

Description

technical field [0001] The invention relates to the field of water environment monitoring, in particular to a measuring device and a measuring method for the biomass of cyanobacteria blooms in wild water bodies. Background technique [0002] With the intensification of human activities, a large amount of pollutants have entered rivers and lakes and caused eutrophication in many water bodies, causing algae to multiply in such water bodies. Cyanobacteria are common dominant species in eutrophic freshwater ecosystems. Especially in summer and autumn, they reproduce faster, and under suitable meteorological conditions, they gather on the water surface to form algal blooms. Cyanobacteria blooms are an environmental problem faced by many countries around the world. Large-scale cyanobacteria blooms occur in Taihu Lake, Chaohu Lake, and Dianchi Lake in China every summer. Some bloom cyanobacteria populations can synthesize toxins in their cells and release them into water bodies. p...

AI Technical Summary

Problems solved by technology

[0003] There are several methods for measuring the biomass of cyanobacteria in natural water bodies: 1. Observe the number of cyanobacteria cells under a microscope. Because most of the cyanobacteria in water blooms are irregular groups of multi-cell aggregation, the counting is prone to large errors 2. Utilize an organic solvent to extract the pigment (chlorophyll or phycocyanin) in the algae cells, measure the content of the pigment in the organic solvent by a spectrophotometer, and finally convert it into the pigment content of the measured water body to obtain the cyanobacteria of the water bloom. Biomass, this method takes a long time and needs to be completed in a laboratory with certain conditions; 3. Based on the natural fluorescence characteristics of cyanobacteria cells, the fluorescence spectrum of cyanobacteria cells is obtained through electronic sensors, and the cyanobacteria biomass is obtained according to the fluorescence spectrum signal. Although the method is fast, the error caused by measuring the biomass of cyanobacteria in water bodies with low transparency is relatively large, and the instruments are relatively expensive

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