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New technology for river sand modification and algae reduction with combined allelopathic modifier

A modifier and combined technology, applied in the field of new algae removal, can solve problems such as reduced efficiency

Inactive Publication Date: 2015-03-25
CHONGQING TECH & BUSINESS UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This countermeasure includes two aspects. One is dredging. It removes the organic matter accumulated in Hanoi or the lake for a long time, and removes internal pollution sources. After the watershed countermeasures are implemented to a certain extent, this measure is feasible, but it is too early to implement , will definitely bring re-silting, and the efficiency will decrease

Method used

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  • New technology for river sand modification and algae reduction with combined allelopathic modifier
  • New technology for river sand modification and algae reduction with combined allelopathic modifier
  • New technology for river sand modification and algae reduction with combined allelopathic modifier

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Experimental program
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Effect test

Embodiment Construction

[0016] Step 1: Firstly, the obtained natural sediment is subjected to sample pretreatment before the experiment, in order to remove the organic matter in the sediment. The samples were washed several times with strong oxidant hydrogen peroxide and deionized water. Add 30% H continuously to the sediment sample 2 o 2 Stir in a water bath at 50°C. Stop adding H 2 o 2 , continue heating in a water bath for half an hour, then wash repeatedly with deionized water, pour off the supernatant, filter, dry in an oven at 60°C, grind, pass through a 200-mesh (74um) sample sieve before use.

[0017] Step 2: Using BG-11 medium, divide 1L of medium into three 1L conical flasks, use sodium hydroxide solution or hydrochloric acid solution to adjust the pH of the medium in each conical flask to 7.1 or so. Then put a cotton plug on the Erlenmeyer flask with prepared culture medium, and sterilize it under the pressure of 1.05kg / cm2 for 30 minutes, and cool the sterilized culture medium na...

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Abstract

Belonging to algae removal technologies, the invention relates to a novel algaecide and a new technology for river sand modification and algae reduction with a combined allelopathic modifier. Specifically, natural sediment is adopted as an algae removal carrier, and a natural organic matter (chitosan) is employed as the modifier, after surface coating modification to natural sediment by a combined allelopathic substance (p-hydroxybenzoic acid), the particle surface carrying charge able to neutralize algal cells in water and modify sediment makes algal cells easier to flocculate and gather, and the modifier in the modified sediment can form a network structure to further capture algal cells, and is eventually removed by sedimentation of flocculent bodies or floccules formed by sediment particles. At the same time, as time goes by, allelochemicals released after chitosan hydrolysis can have inhibiting and killing effects on algal growth, thus achieving the purpose of efficient algae removal.

Description

technical field [0001] This technology is a new type of algae removal technology. Specifically, natural river sand is used as an algae removal carrier, and the modifier (chitosan) is used to coat allelochemicals (p-hydroxybenzoic acid) and natural river sand. To achieve the purpose of modifying river sand, while improving the ability of sediment flocculation to remove algae cells, natural allelochemicals can be used to inhibit and kill algae cell regeneration, so as to achieve long-term, efficient and harmless algae removal. Background technique [0002] At present, the methods of algae removal at home and abroad can usually be divided into two categories: direct methods and indirect methods. Direct algae removal can be divided into three categories: chemical methods, physical methods and biological methods. The indirect method mainly refers to the method of controlling the growth of algae by removing or reducing the concentration of nutrient salts. [0003] (1) Direct met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
CPCA01N25/08A01N37/40A01N43/16C02F1/50A01N2300/00
Inventor 钟成华刘洁蒋佳凌
Owner CHONGQING TECH & BUSINESS UNIV
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