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Method for removing algae in water through oxidizing agent activated through ferrous iron

An oxidant, water removal technology

Inactive Publication Date: 2015-10-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far there is no report or patent on using ferrous activated persulfate to remove algae and degrade its metabolized olfactory substances. CN103818993A discloses a ferrous activated persulfate or monoperoxyhydrogensulfate advanced oxidation The method for advanced treatment of papermaking wastewater is papermaking wastewater; there are also other methods to remove odor substances in water, such as: CN103121732A discloses a method for removing odor substances in water. This method uses photocatalysis and Ultrafiltration membranes are combined to remove odor substances; CN102092899A discloses a system and method for removing natural organic matter and odor-causing substances in slightly polluted water, but this method uses biological aerated filter towers and ultrafiltration membranes

Method used

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  • Method for removing algae in water through oxidizing agent activated through ferrous iron
  • Method for removing algae in water through oxidizing agent activated through ferrous iron
  • Method for removing algae in water through oxidizing agent activated through ferrous iron

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A method for removing algae in water by using an oxidant activated by ferrous iron, including the following steps: diluting a high-concentration algae liquid so that the algae activity is 0.35, and the density of pseudo-anabaena is 1.4×10 7 Cell / L, the chlorophyll concentration value (chl-a) is 1ug / L, and the diluted algae solution is used as the reaction solution. Add sodium persulfate solution and ferrous sulfate heptahydrate solution to the reaction algae solution to make the concentration of both 1mM, react at room temperature, and measure its activity and chlorophyll concentration value at different times, such as figure 1 As shown, figure 1 This is a graph showing changes in algae cell activity and chlorophyll concentration over time when an oxidant activated by ferrous iron is used to remove algae in the water in the embodiment of the present invention. From figure 1 It can be seen that the ferrous persulfate activates the algae in 30 minutes, and completely oxidize...

Embodiment 2

[0040] A method for removing algae in water by using an oxidant activated by ferrous iron, including the following steps: diluting a high concentration of algae liquid so that the algae activity is 0.35, and the density of pseudo-anabaena is 1.4×10 7 Cell / L, the chlorophyll concentration value (chl-a) is 1ug / L, and the diluted algae solution is used as the reaction solution. Add sodium persulfate solution and ferrous sulfate heptahydrate solution to the reaction algae solution, the concentration of sodium persulfate solution is 0.5mM and 5mM, the molar ratio of the concentration of ferrous sulfate heptahydrate to sodium persulfate is 1:1, The reaction was performed at room temperature, and the activity and chlorophyll concentration value and the concentration of the metabolized odor substance 2-MIB were measured at different times. Table 2 shows the average degradation effect of its 120min algae activity, remaining chlorophyll and 2-MIB.

[0041] Table 2

[0042] 0.5mM sodium ...

Embodiment 3

[0044] A method for removing algae in water by using an oxidant activated by ferrous iron, including the following steps: diluting a high-concentration algae liquid so that the algae activity is 0.35, and the density of pseudo-anabaena is 1.9×10 7 cell / L, the chlorophyll concentration value (chl-a) is 10ug / L, and the diluted algae solution is used as the reaction solution. Add sodium persulfate solution and ferrous sulfate heptahydrate solution to the reaction algae solution, the molar ratio is 1:1. The concentration of sodium persulfate solution and ferrous sulfate heptahydrate solution are 0.5mM, 1mM, 5mM, at room temperature In response, the activity and chlorophyll concentration value and the degradation effect of the metabolized 2-MIB were measured at different times. The average degradation effect of its 120min algae activity, remaining chlorophyll and 2-MIB is shown in Table 3.

[0045] table 3

[0046] 0.5mM sodium persulfate 120min algae activity

[0047] In this examp...

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Abstract

The invention discloses a method for removing algae in water through an oxidizing agent activated through ferrous iron. The method comprises the following steps that an oxidizing agent and a ferrous iron solution are added in water containing the algae, and analysis is carried out after the reaction to obtain the activity of the algae, the residual chlorophyll and the value of algae metabolism products so that the removing degree of the algae in the water can be judged. The algae are pseudoanabaena, the oxidizing agent is persulfate or monoperoxy disulfate, and the ferrous iron is a substance capable of releasing ferrous ions. The method is environmentally friendly, secondary pollution can be avoided, a good effect can be achieved at the room temperature as long as the reagent is put into the water body where the algae need to be removed and tastes and orders need to be degraded, other devices are not needed, operation is simple, and storage and transportation are easy; the method can be used for removing the algae and degrading taste and smelly matter.

Description

Technical field [0001] The invention belongs to the application field of water treatment technology, and relates to a method for removing suspended solids in water, in particular to a method for removing algae in water. Background technique [0002] In the past ten years, the eutrophication of freshwater bodies in my country has become increasingly serious, which has led to the proliferation of algae in many rivers and lakes. The proliferation of algae will cause the deterioration of water quality and emit unpleasant odors or other peculiar smells. When the algae die, they will also release harmful substances such as algae toxins. The proliferation of algae not only affects the survival of aquatic organisms, but also seriously affects human production and life. [0003] At present, the common oxidants used in water treatment mainly include ozone, chlorine, and potassium permanganate. Pre-chlorination can kill the algae, making it easy to be removed in the subsequent treatment pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
Inventor 黎雷赵来财李建峰郭海成贺玲董子萱郭婧轩张均刘建伟
Owner TONGJI UNIV