Spirogyra and attached algae control method based on maintaining of water quality

A technology of Spirogyra and algae, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. and Spirogyra, the long-term control effect is small, etc.

Active Publication Date: 2017-11-24
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the practice of ecological restoration with the main technical means of restoring or building a stable submerged plant community structure, attached algae often form a high biomass on the surface of plant leaves, and large areas of spirogyra are easily formed on the water surface. How to control these attached There is no ecological and long-term control technology for the biomass of algae and the inhibition of the formation of Spirogyra
At present, there are three main measures to prevent and control the outbreak of filamentous algae at home and abroad: (1) Physical method: Manual salvage is the most common method. This method is effective and safe, but the operation is difficult and expensive, and the algal filaments are easy Fracture, it is easier to promote its mass reproduction, and cannot fundamentally solve the problem of massive outbreaks of filamentous algae; (2) Chemical methods: mainly inject artificial synthesis or plant extracts into water bodies that have formed large

Method used

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  • Spirogyra and attached algae control method based on maintaining of water quality
  • Spirogyra and attached algae control method based on maintaining of water quality
  • Spirogyra and attached algae control method based on maintaining of water quality

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Embodiment 1

[0024] Embodiment 1 A kind of method that fish and benthic animals control the formation of Spirogyra and the increase of algae biomass attached to the surface of Erytheria

[0025] A. Experimental system: In a polyethylene plastic bucket with a volume of 200 L, hold 10 cm of lake mud filtered through a steel wire mesh with a mesh size of 0.5 cm, and then put lake water to a distance of 15 cm from the mouth of the bucket. A total of 18 buckets are needed, and 6 treatment groups are set up, which are the control group, the mussel group, 2 fish density groups (1 and 3 fish) and 2 fish-mussel composite groups (mussels+1 Snakefish and mussels+3 Snakefish), each treatment group had 3 replicates.

[0026] B. Cultivation of bitter grass: choose bitter grass with the same size, cut off the old leaves withered at the end of bitter grass leaves, and set aside. The average length of 25 cm leaves was selected, and the average biomass of each plant was 5.5 g. 20 plants of bitter grass we...

Embodiment 2

[0036] In the ponds planted with bitter grass, put the larvae fry. The body length of the larvae is 8cm, the weight is 5g / tail, and the stocking density is 2 fish / m 2 , within 10 days of putting the big fin carp into the pond, put 130g / only river mussels into the pond, and the putting density is 2 / m 2 .

Embodiment 3

[0038] In the lakes planted with bitter grass, put the big fin fish fry, the body length of the big fin is 9cm, the weight is 8g / tail, and the stocking density is 3 fish / m 2 , within 10 days of putting the big fin carp into the pond, put 168g / only river mussels into the pond, and the putting density is 2 / m 2 .

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Abstract

The invention relates to method for suppressing the formation of spirogyra and controlling the increase of biomass of the attached algae, which can be applied to the field of water ecological restoration. The method comprises the following steps: stocking fishes in water in which a submerged plant community structure is built to perform the ecological restoration; launching freshwater mussels within 10 days after the fishes are launched, so that an effect for suppressing the formation of the spirogyra and controlling the increase of biomass of the algae attached to the surface of a submerged plant leaf can be achieved by utilizing an ecological effect of the fishes and the freshwater mussels in the water in the case that the water quality and the underwater light condition are not apparently influenced, so that an lasting and sustainable control effect of the fishes for the algae and spirogyra attached to the plant leaves can be maintained. On the basis of synthesizing the existing biological water purification technologies, the invention achieves the long-term, ecological control of the attached algae biomass to the surface the spirogyra and the plant leaves by stocking fishes and filter-feeding benthos in the system and utilizing the joint action of the fishes and the filter-feeding benthos of the algae biomass.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and in particular relates to a method for controlling the formation of Spirogyra and inhibiting the increase of attached algae biomass on the premise of maintaining water quality. Background technique [0002] Water eutrophication is one of the water environmental problems that are widely concerned by countries all over the world. It often leads to the steady-state transition of freshwater ecosystems, that is, to promote the transition from clear water (high transparency, clear water) with submerged plants as the main primary producers to Turbid water state (low transparency, turbid water body) in which phytoplankton are the main primary producers. Therefore, in order to make better use of lake resources, it has become an urgent problem to restore eutrophic lakes to the state before eutrophication. Water bodies with higher coverage of submerged plants generally have higher transpa...

Claims

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Application Information

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IPC IPC(8): C02F3/32
CPCC02F3/327
Inventor 于谨磊刘正文关保华陈非洲
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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