Method for extracting algaecide out of moringa oleifera oil residue and removing algae in water by using algaecide

Abstract

The invention discloses a method for extracting algaecide out of moringa oleifera oil residue and removing algae in water by using the algaecide, belonging to the algae-removing in water technology field. The method comprises the following steps of: crushing the moringa oleifera oil residue after the oil is extracted into moringa oleifera oil residue powder; mixing and stirring the moringa oleifera oil residue powder with an ammonium sulfate solution; filtering the mixed solution; adding ammonium sulfate powder into the filtered liquid; carrying out centrifugal treatment on the mixed solution; eluting white precipitate by using distilled water; dialyzing the eluant; taking the emulsion in a dialysis bag as the final algaecide; taking a certain amount of the algaecide and adding into water containing algae to be treated; and stirring and precipitating so as to remove the algae in the water. According to the method, the oil residue after the oil is extracted from moringa oleifera is taken as the raw material, so that a novel way is developed for resource utilization of the moringa oleifera oil residue; and meanwhile the method has the advantages of simpleness and convenience in algaecide extraction process, simpleness and convenience in equipment, simpleness and convenience in operation and the like, the extracted algaecide has a good algaecide effect, and a novel method is provided for water body eutrophication treatment and removal of algae in water sources.

Description

technical field [0001] The invention relates to a method for removing algae in water, in particular to a method for extracting an algaecide from Moringa oil residue and using it for removing algae in water. Background technique [0002] More than 66% of lakes and reservoirs in my country are at the level of eutrophication, of which heavy eutrophication and super eutrophication account for 22%, which leads to frequent occurrence of algal blooms. The main hazards of algae are: 1) The excessive growth of algae in the water will change the color of the water body and lose the landscape function. 2) A large number of algae cover the water surface, blocking the photosynthesis of plants in the water body, resulting in severe hypoxia in the water body. At the same time, the process of algae death and decomposition consumes dissolved oxygen in the water, suffocates fish, etc., and seriously damages the ecological function of the water body; 3 ) substances such as geosmin and 2-methy...

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Problems solved by technology

2) A large number of algae cover the water surface, blocking the photosynthesis of plants in the water body, resulting in severe hypoxia in the water body. At the same time, the process of algae death and decomposition consumes dissolved oxygen in the water, suffocates fish, etc., and seriously damages the ecological function of the water body; 3 ) substances such as geosmin and 2-methylisobutyrol released during the growth of algae cause tap water odor and seriously affect the taste of tap water. At the same time, algae toxins released by algae cannot be removed by conventional water treatment technologies, and algae toxins may induce cancer. , which is extremely harmful to the health of users

4) The algae in the raw water of the waterworks will block the filter, resulting in an increase in the backwash frequency of the filter in the waterworks, thereby increasing the cost of water production. A small amount of algae that penetrates the filter will affect the water supply quality

This method includes two methods of manual salvage and mechanical salvage. Among them, the efficiency of manual salvage is low, and the equipment mainly used for mechanical salvage is the algae fishing boat. At present, the algae fishing boats developed in my country mainly include suction type, separation type and comprehensive type. model

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