Test system for determining primary productivity of river benthic algae

Abstract

The invention provides a test system for determining the primary productivity of river benthic algae. The test system at least comprises a sample unit, a measure unit and a control unit, wherein the sample unit is a photobioreactor, and comprises a glass cover, a rotatable pedestal, a benthic alga growth matrix, a water circulation device and a gas discharge tube; the glass cover and the rotatable pedestal are manufactured through processing organic glass, the glass cover is a semi-spherical housing with a downward opening, the lower end of the glass cover is in rotary seal connection with the rotatable pedestal through screw threads, the benthic alga growth matrix is arranged between the glass cover and the rotatable pedestal, and a water sample is arranged between the glass cover and the benthic alga growth matrix; the measure unit is a dissolved oxygen sensor, the probe of the dissolved oxygen sensor is arranged in the water sample in the glass cover; and the control unit comprises a control panel, and a one-chip microcomputer and a power supply arranged in the control panel, and the one-chip microcomputer is connected with the dissolved oxygen sensor. Compared with traditional systems, the system of the invention has the advantages of high automation degree and working efficiency improvement.

Description

technical field [0001] The invention relates to a primary productivity test system, in particular to a system for measuring the primary productivity of benthic algae in rivers. Background technique [0002] Algae in the littoral zone of rivers generally include benthic and planktonic algae. Although their lifestyles are different, they are all at the beginning of the food chain and are the main contributors to the production of organic matter in the littoral zone. They are one of the basic parameters reflecting the fishery production potential of the water body. , and algae are the best monitoring organisms for monitoring the eutrophication of water bodies. The productivity of planktonic algae in river ecosystems is lower than that of benthic algae, so the primary productivity of benthic algae is an ideal monitoring indicator. The existing algae primary productivity measurement methods include oxygen measurement method and carbon measurement method. The primary productivity ...

AI Technical Summary

Problems solved by technology

The above two methods cannot achieve continuous real-time detection, and the cultivation time can only be determined by measurement experience

In order to have better measurement accuracy, the incubation time is often set longer, thus prolonging the measurement time

Moreover, the above-mentioned methods all need to be cultivated on the spot. After cultivating, the samples are fixed and then returned to the laboratory for detection. The detection instrument cannot be used on the spot, and the measurement of the photosynthesis rate of phytoplankton cannot be completed at one time. The measurement operation is complicated and the degree of automation is low, and this The two methods are only suitable for the determination of the primary productivity of planktonic algae, and cannot complete the determination of the primary productivity of river benthic algae. At the same time, there are many unpredictable problems in the field test, which affect the research results.

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