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A method of inhibiting Microcystis aeruginosa by using allelochemicals extracted from eucalyptus apmp pulping wastewater

A technology of Microcystis aeruginosa and allelochemicals, which is applied in the field of water body environmental governance, can solve the problems of ecological system hazards, poor operability, slow effect, etc., and achieve the improvement of biochemical treatment efficiency, reduction of COD pollution load, good practicability and feasibility sexual effect

Inactive Publication Date: 2017-01-25
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical methods mainly include mechanical algae removal, ultraviolet algae removal, etc. These methods have quick results, but are expensive and poor in operability, and are not suitable for large waters; chemical methods are mainly to kill algae or control their growth by adding chemicals to water. This method is currently the most mature algae killing method at home and abroad, but the secondary pollution caused cannot be ignored, and long-term use will bring serious harm to the ecosystem; the biotechnology method uses microorganisms or aquatic plants to inhibit algae, Mostly used for prevention, the effect is slow, and its long-term effects are full of unknowns

Method used

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Effect test

Embodiment 1

[0032] A method for inhibiting Microcystis aeruginosa by using allelochemicals extracted from eucalyptus APMP pulping wastewater, the wastewater used in this embodiment is comprehensive wastewater from eucalyptus APMP pulping, containing pre-impregnation, extrusion, pulping Comprehensive waste water produced.

[0033]The pulping wastewater is extracted with organic solvents of different polarities to obtain the allelochemicals in the wastewater. The following petroleum ether, methyl tert-butyl ether (MTBE), CH 2 Cl 2 One or more than two kinds of organic solvents such as ethyl acetate and ethyl acetate are mixed for extraction, and ethyl acetate or methylene chloride is preferably used for extraction.

[0034] (1) In the extraction, the organic solvent and the wastewater are extracted once under the conditions of pH=3 and pH=8 according to the ratio of 1:5, and the organic phase is mixed after extraction. When using ethyl acetate for extraction, the organic phase is at -0.3 a...

Embodiment 2

[0039] A method for inhibiting Microcystis aeruginosa by using allelochemicals extracted from eucalyptus APMP pulping wastewater. The wastewater used in this embodiment is eucalyptus APMP pulping wastewater as pre-impregnation wastewater.

[0040] Pulping wastewater is extracted with organic solvents of different polarities to obtain the allelochemicals in the wastewater. The extraction uses petroleum ether, MTBE, CH 2 Cl 2 One or more than two kinds of organic solvents such as ethyl acetate and ethyl acetate are mixed for extraction, and methyl tert-butyl ether is preferably used for extraction.

[0041] (1) In the extraction, the organic solvent and the wastewater are extracted once under the conditions of pH = 3 and pH = 9 according to the ratio of 1:3. After the extraction, the organic phase is mixed, and the organic phase is used under the condition of -0.3 atmospheric pressure vacuum degree and 55 ° C. Concentrate down to 1.5% of the total organic phase; and reclaim the...

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Abstract

The invention relates to a method for inhibiting microcystis aeruginosa by using allelochemicals extracted from eucalyptus APMP (alkaline peroxide mechanical pulp) pulping wastewater. The method comprises the following steps: extracting the allelochemicals from APMP pulping wastewater by virtue of organic solvents with different polarities and concentrating till reaching1-3% of the volume of general organic phase to obtain a concentrate which is an allelochemical organic solvent solution; then, under the condition of nitrogen introduction, further volatizing the organic solvents in the allelochemical organic solvent solution at 25-60 DEG C for 1-6 hours to obtain eucalyptus APMP pulping wastewater allelochemicals; and diluting and using. The algal inhibition rate of the allelochemicals prepared by the method is 50-85%. In large-scaled application, a proper amount of water is added into the allelochemicals of the APMP pulping wastewater and after being sheared and emulsified at a high speed, the allelochemicals of the APMP pulping wastewater are directly added into a water body where microcystis aeruginosa grows, wherein the addition of the allelochemicals of the APMP pulping wastewater is 1.0-15 microgram / ml and the inhibiting rate for microcystis aeruginosa is 40-85%.

Description

technical field [0001] The invention belongs to the field of water body environment treatment, in particular to a method for inhibiting Microcystis aeruginosa by using allelochemicals extracted from eucalyptus APMP pulping wastewater. Background technique [0002] Allelopathy refers to a phenomenon that plants and microorganisms affect the growth of other organisms by releasing chemical substances into the environment. The released chemical substances are called allelopathic substances, which are secondary metabolites with small molecular weight, usually in natural conditions. It is easy to degrade under the environment, will not accumulate in the ecosystem, and has good ecological security. Utilizing the allelopathic effect of higher plants to inhibit algae and kill algae is currently the most ideal method for algae removal. [0003] Water bloom is a natural ecological phenomenon in which algae multiply in fresh water bodies. It is a characteristic of eutrophication in wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00
CPCC02F1/00
Inventor 刘廷志亓晖周盼丽李丽娟
Owner TIANJIN UNIV OF SCI & TECH