Novel method for combined usage of Corbicula fluminea and Limnodrilus hoffmeisteri in inhibition of release of endogenous phosphorus in closed water body

A water worm and closed technology, applied in the field of environmental governance, can solve problems such as water quality deterioration, large resource investment, secondary pollution, etc., and achieve the effects of promoting recovery, reducing dredging frequency, and reducing treatment costs

Inactive Publication Date: 2014-05-07
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above problems existing in the prior art, and to provide a new method for suppressing the release of source phosphorus in closed water bodies by com...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1 Laboratory sediment restoration simulation experiment

[0023] Two 2*1*1 plastic boxes are used as the experimental simulation device. The bottom mud at the bottom of each device is 15cm thick, and the bottom mud is taken from the campus river. Then add river water, the water depth is 70cm. After 10 days of static culture, the nutrient exchange between the sediment and the overlying water was basically completed. Device No. 1 was used for restoration, and Device No. 2 was used as a control.

[0024] On the 11th day, in device No. 1, add 20,000 purchased water worms, equal in size, with a single length of 2-3cm. After 3 days, add 400 river clams of equal size, each weighing 2-4g.

[0025] Starting on day 15, phosphorus concentrations in the overlying water of 2 installations were monitored. And every 10 days, the overlying water of the two devices was pumped out, and then tap water that had been dried (chlorinated) was added to speed up the release of endo...

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Abstract

The invention discloses a novel method for combined usage of Corbicula fluminea and Limnodrilus hoffmeisteri in inhibition of release of endogenous phosphorus in a closed water body. The method comprises the following steps: 1) adding Limnodrilus hoffmeisteri into sediment; 2) adding Corbicula fluminea in 2 to 3 days; and 3) detecting the concentration of phosphorus in water in each ten days until the concentration of phosphorus is stable. According to the invention, resources are saved, new chemical risks are prevented from being introduced into the water body, the purpose of control of release of endogenous phosphorus is realized, and the landscape function of the water body is prevented from being destroyed in the process of restoration of the water body.

Description

technical field [0001] The invention relates to an environmental treatment technology, in particular to a new method for inhibiting the release of source phosphorus in closed water bodies through the combined use of river clams and waterworms. Background technique [0002] For closed water bodies that have been cut off from exogenous pollution, endogenous release is the key link to maintain the nutrient content of the water body. It is precisely because of the release of endogenous sources that the water quality of the water body has not improved significantly in the short term. Although people have adopted restoration techniques to cut off exogenous sources, in the long run, if the release of endogenous sources cannot be effectively controlled, it will be in the sediment for a long time. , water, and organisms continue to circulate, thus affecting the repair effect. [0003] For eutrophic water bodies, people usually use chemical methods, physical methods, and environmenta...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/32C02F11/02
Inventor 李大鹏
Owner SUZHOU UNIV OF SCI & TECH
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