In-situ removal device and removal method for overwintering cyanobacteria in lake sediment

A sediment and lake technology, applied in the field of water environment research, can solve the problems of complicated removal process, secondary pollution of water body, complicated removal device, etc., and achieve the effect of high flexibility, preventing bottoming, and preventing sediment from floating with water body.

Active Publication Date: 2019-10-15
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Aiming at the problems of complex removal process of cyanobacteria, algae toxins and exogenous nutrient elements in the existing cyanobacteria bloom control technology, easy diffusion of the removal process to cause secondary pollution to the water body, and complex removal devices, the invention provides a lake sediment overwintering cyanobacteria The in-situ removal device and removal method can effectively remove cyanobacteria, algal toxins and exogenous nutrients in the sediment, and can effectively prevent secondary pollution to the water body during the removal process

Method used

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  • In-situ removal device and removal method for overwintering cyanobacteria in lake sediment
  • In-situ removal device and removal method for overwintering cyanobacteria in lake sediment
  • In-situ removal device and removal method for overwintering cyanobacteria in lake sediment

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Embodiment 1

[0044] Such as figure 1 and figure 2 As shown, the in-situ removal device for overwintering cyanobacteria in the lake bottom mud provided by the present invention includes a reactor, the reactor is installed on the lake bottom mud, and its bottom installation part on the bottom mud is an open design, which is in direct contact with the bottom mud , forming a closed reactor internal environment; the reactor is provided with a filter screen 10, an adsorption material 11 is placed on the filter screen 10, and a water body disturbance device is provided at the lower part of the reactor, and the water body disturbance device is provided with a disturbance vane 4. The rotation of the disturbance blade 4 can drive the movement of the water body enclosed in the reactor. The bottom of the reactor is equipped with a bottom-reaching beam 2, which is in direct contact with the bottom mud. The bottom of the bottom-touching beam 2 is distributed with several plant root grooves 3 protrudin...

Embodiment 2

[0054] The present embodiment is basically the same as embodiment 1, and its difference is only that the submerged plants selected in the present embodiment are foxtail algae, and the disturbance treatment period is 10 days; the disturbance leaf 4 stops after working 12 hours every day, and leaves standstill for 12 hours; The adsorption period was 1 day. In addition, the material of the filter screen in this embodiment is ZIF-8.

[0055] In this example, the bottom mud of Gehu Lake in March was treated, and the removal of cyanobacteria, nitrogen, phosphorus and algal toxins was detected. See Table 1 for the concentration of pollutant indicators in the water body when the disturbed sediment was not treated before treatment and after treatment.

[0056] Table 1. Detection of indicators in water before and after treatment

[0057]

Embodiment 3

[0059] The present embodiment is basically the same as embodiment 1, and its difference is only that the submerged plant selected in the present embodiment is a weed, and the disturbance treatment period is 16 days; the disturbance leaf 4 stops after working 14 hours a day, and leaves standstill for 10 hours; leave standstill The adsorption period is 2 days. In addition, the material of the filter screen in this embodiment is Cu-BTC.

[0060] In this example, the bottom mud of Gehu Lake in March was treated, and the removal of cyanobacteria, nitrogen, phosphorus and algal toxins was detected. See Table 2 for the concentration of pollutant indicators in the water body when the disturbed sediment was not treated before treatment and after treatment.

[0061] Table 2. Detection of indicators in water before and after treatment

[0062]

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Abstract

The invention discloses an in-situ removal device and a removal method for overwintering cyanobacteria in lake sediment, and belongs to the technical field of water environment research. The in-situ removal device for the overwintering cyanobacteria in the lake sediment comprises a reactor of which the bottom is open; the reactor is directly mounted on the lake sediment to form a closed reactor internal environment; a filter screen is arranged in the reactor; an adsorption material is placed on the filter screen; a water body disturbance device is arranged under the filter screen; the water body disturbance device comprises disturbance blades; the disturbance blades drive a water body to move; the cyanobacteria, nitrogen, phosphorus and algal toxin can be controlled and removed effectivelyby performing the in-situ removal work of the cyanobacteria by utilizing the in-situ removal device for the overwintering cyanobacteria in the lake sediment provided by the invention.

Description

technical field [0001] The invention belongs to the field of water environment research, and more specifically relates to an in-situ removal device and method for overwintering cyanobacteria in lake bottom mud. Background technique [0002] Cyanobacteria (such as Microcystis, Anabaena, A. water blooms, Oscillation algae, etc.), also known as cyanobacteria, are widely distributed in nature, including various water bodies, soils, and some organisms inside and outside, even on rock surfaces and Traces of them can be found in other harsh environments (high temperature, low temperature, salt lakes, deserts and ice sheets, etc.). value. However, with the increasing development and utilization of environmental resources by human beings, the development of industry and the high concentration of rural population, a large amount of industrial wastewater and domestic sewage containing pollutants will be discharged into the water body without proper treatment, making the ammonia nitrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/28C02F1/28
CPCC02F1/28C02F3/32C02F3/28Y02W10/37
Inventor 孔明张毅敏管祥洋许雪婷高月香韩天伦豆叶枝汪龙眠
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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