MICROALGAE: CULTIVATION AND USES

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Solicitudes publicadas en los últimos 120 días / Applications published in the last 120 days



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INTEGRATED PROCESS FOR THE SUSTAINABLE AND AUTONOMOUS CO2-EMISSION-FREE PRODUCTION OF HYDROGEN AND RELATED SYSTEM

Publication No.: WO2022264182A1 22/12/2022

Applicant:

VENTRIGLIA FAUSTO MARIA [IT]

Absstract of: WO2022264182A1

The present invention concerns an integrated process for producing hydrogen comprising the following steps: a) production of algal biomass by means of a photobioreactor (1) wherein microalgae are fed with water and carbon dioxide and irradiated with light radiation; b) anaerobic digestion for obtaining biomethane and nitrogen digestates by means of an anaerobic digester (2), wherein said anaerobic digestion takes place starting from said algal biomass obtained in said step a); c) steam reforming for obtaining hydrogen, carbon dioxide and heat starting from steam, oxygen and said biomethane obtained in said step b), and subsequent separation of carbon dioxide; and d) alkaline electrolysis of water for obtaining hydrogen and oxygen, by means of electrolysers (4), starting from water heated by the heat obtained in step c) and electric power, wherein the carbon dioxide in said step a) comes from step c) and the oxygen in said step c) comes from step d).

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EXTRACT WITH ANTI-INFLAMMATORY EFFECT

Publication No.: WO2022263580A1 22/12/2022

Applicant:

MEDIZINISCHE UNIV INNSBRUCK [AT]
MCI MAN CENTER INNSBRUCK [AT]
ADSI AUSTRIAN DRUG SCREENING INST GMBH [AT]

EP_4104845_PA

Absstract of: WO2022263580A1

The present invention relates to an anti-inflammatory extract of soil microorganisms or a fraction thereof, wherein the microorganisms comprise one or more selected from Chlorophyta, Xanthophyceae or Cyanobacteria. The invention further relates to compositions comprising two or more of Lyso-DGTS, p-Coumaric acid (ester-linked), oleamide, theophylline, or DGTS. The invention further relates to pharmaceutical compositions comprising the anti-inflammatory extract of soil microorganisms or a fraction thereof or a composition comprising two or more of Lyso-DGTS, p-Coumaric acid (ester-linked), oleamide, theophylline, or DGTS as an active ingredient. The invention further relates to an anti-inflammatory extract of soil microorganisms or a fraction thereof or a pharmaceutical composition comprising an anti-inflammatory extract of soil microorganisms or a fraction thereof or a composition comprising two or more of Lyso-DGTS, p-Coumaric acid (ester-linked), oleamide, theophylline, or DGTS as an active ingredient for use as a medicament, wherein the microorganisms comprise one or more selected from Chlorophyta, Xanthophyceae or Cyanobacteria. The invention further relates to compositions comprising an anti- inflammatory extract of soil microorganisms or a fraction thereof, wherein the microorganisms comprise one or more selected from Chlorophyta, Xanthophyceae or Cyanobacteria.

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EXTRACT WITH ANTI-INFLAMMATORY EFFECT

Publication No.: EP4104845A1 21/12/2022

Applicant:

MEDIZINISCHE UNIV INNSBRUCK [AT]
MCI MAN CENTER INNSBRUCK [AT]
ADSI AUSTRIAN DRUG SCREENING INST GMBH [AT]

WO_2022263580_PA

Absstract of: EP4104845A1

The present invention relates to an anti-inflammatory extract of soil microorganisms or a fraction thereof, wherein the microorganisms comprise one or more selected from Chlorophyta, Xanthophyceae or Cyanobacteria.The invention further relates to compositions comprising two or more of Lyso-DGTS, p-Coumaric acid (ester-linked), oleamide, theophylline, or DGTS.The invention further relates to pharmaceutical compositions comprising the anti-inflammatory extract of soil microorganisms or a fraction thereof or a composition comprising two or more of Lyso-DGTS, p-Coumaric acid (ester-linked), oleamide, theophylline, or DGTS as an active ingredient.The invention further relates to an anti-inflammatory extract of soil microorganisms or a fraction thereof or a pharmaceutical composition comprising an anti-inflammatory extract of soil microorganisms or a fraction thereof or a composition comprising two or more of Lyso-DGTS, p-Coumaric acid (ester-linked), oleamide, theophylline, or DGTS as an active ingredient for use as a medicament, wherein the microorganisms comprise one or more selected from Chlorophyta, Xanthophyceae or Cyanobacteria.The invention further relates to compositions comprising an anti-inflammatory extract of soil microorganisms or a fraction thereof, wherein the microorganisms comprise one or more selected from Chlorophyta, Xanthophyceae or Cyanobacteria.

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Systems and methods for the cultivation of target product

Publication No.: AU2021273186A1 15/12/2022

Applicant:

RUNNING TIDE TECHNOLOGIES INC [US]

US_2022295761_PA

Absstract of: AU2021273186A1

Systems and methods for cultivating or accumulating climate-focused marine target products are described herein. The target product may be microalgae, macroalgae, plankton, marine bacteria or archaea, filter feeders (such as oysters or clams), or crustaceans either for the purpose of bioremediation, eventual cultivation or for sequestering carbon dioxide; or the target product may be direct chemical or biological accumulation of carbon or carbon containing organisms. The system is primarily a floating apparatus designed to hold the target product in a region of the water column and in a spatial region of the water where it will best accumulate target product mass. In some embodiments the system is designed to achieve eventual passive sinking (transformation from a floating to sinking apparatus) into the deep ocean. In some embodiments, the system is equipped with purpose-chosen sensors to instrument and quantify the various biological and mechanical processes occurring onboard.

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HYBRID SYSTEM OF CARBON DIOXIDE COMPACT MEMBRANE SEPARATION AND CARBON RECYCLING FOR URBAN POWER PLANT FOR EFFLUENT CARBON DIOXIDE CONCENTRATION CONTROL

Publication No.: US2022387928A1 08/12/2022

Applicant:

KOREA DISTR HEATING CORP [KR]

JP_2022187491_PA

Absstract of: US2022387928A1

Disclosed is a hybrid system of carbon dioxide compact separation membrane and carbon recycling for an urban power plant for effluent carbon dioxide concentration control, including a blower into which an exhaust gas is input and which distributes the exhaust gas, a photo-culture process unit which receives the exhaust gas from the blower, performs a photo-culture process using microalgae, and discharges a first treatment gas, a mixing tank into which the exhaust gas supplied from the blower and the first treatment gas are input, a separation membrane process unit which receives a second treatment gas mixed in the mixing tank, and separates a third enriched gas from the second treatment gas using a plurality of separation membranes, a mineralization reaction unit which mineralizes carbon dioxide using the third enriched gas separated in the separation membrane process unit and discharges a third treatment gas to the mixing tank, a sensor unit which measures a carbon dioxide concentration discharged from each process using a plurality of sensors, and a control unit which controls operations of the photo-culture process unit, the separation membrane process unit and the mineralization reaction unit according to a carbon dioxide content of the inflow exhaust gas.

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NOVEL MICROALGAE HAVING HIGH LOLIOLIDE PRODUCTIVITY

Publication No.: US2022387295A1 08/12/2022

Applicant:

KOREA RES INST BIOSCIENCE & BIOTECHNOLOGY [KR]

WO_2020159298_A2

Absstract of: US2022387295A1

The present invention relates to novel microalgae with high productivity of loliolide, in which the Scenedesmus sp. HS4 of the present invention can be used as a biological resource to produce loliolide due to its high biomass productivity and high loliolide content, and can be used as a pharmaceutical composition or cosmetic composition which requires loliolide derived from Scenedesmus sp. HS4.

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METHOD FOR CAPTURING AND REMOVING CARBON DIOXIDE BY USING PHOTO-CULTURE

Publication No.: WO2022255844A1 08/12/2022

Applicant:

C&S INT LTD [KR]

Absstract of: WO2022255844A1

Disclosed is a method for capturing and removing carbon dioxide by using photo-culture, the method comprising: a carbonic anhydrase supplying step of supplying a culture liquid with a carbonic anhydrase as a reaction catalyst; a carbon dioxide supplying step of supplying the carbonic anhydrase and the culture liquid with a gas, which is to be treated and contains carbon dioxide; a carbon dioxide converting step of contacting the carbon dioxide with the culture liquid and the carbonic anhydrase to convert the carbon dioxide into a form of inorganic carbon; and a carbon dioxide consuming step of allowing the inorganic carbonic acid to be used and consumed in the photosynthesis of microalgae contained in the culture liquid.

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METHOD AND DEVICE FOR THE PRODUCTION OF MICROALGAE BIOMASS

Publication No.: US2022389357A1 08/12/2022

Applicant:

IGV INST FUER GETREIDEVERARBEITUNG GMBH [DE]

JP_2023500201_PA

Absstract of: US2022389357A1

The invention relates to the production of microalgae biomass. The microalgae contained in a suspension of water and microalgae are continuously phototrophically or mixotrophically cultivated in a cultivation module (1), which is passed multiple times by the suspension and has a gas part and a liquid part with a liquid supply (3), by supplying light from at least one artificial light source (5) and nutrients. According to the turbidity established by sensors, volume fractions of the suspension are repeatedly discharged from the cultivation module (1) for the harvest of microalgae and removed by means of a centrifuge (7). The cultivation of the microalgae occurs in an climate chamber forming the cultivation module (1), which is operated using water. Alongside a regulating of the temperature of the suspension, there also occurs a regulating of its pH value via the controlled addition of buffer ions and a regulating of the redox potential of the suspension and thereby also of its microbial contamination by controlling the light and nutrient supply, as well of a metered addition of oxygen. In addition, after the removal of microalgae, the remaining suspension is irradiated with UV light in order to kill unwanted microbial contamination before being returned into the cultivation module (1).

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SYMBIOTIC BACTERIA COMPOSITION, PREPARATION METHOD THEREFOR AND CULTURE METHOD FOR MICROALGAE

Publication No.: WO2022247225A1 01/12/2022

Applicant:

HAINAN GREEN ALGAE WORLD BIOTECHNOLOGY CO LTD [CN]

Absstract of: WO2022247225A1

Provided are a symbiotic bacteria composition, a preparation method therefor, and a culture method for microalgae. The symbiotic bacteria composition is composed of marine Clostridium butyricum, marine red yeast, and marine purple non-sulfur bacteria; by means of the symbiotic effect of the three probiotics: marine Clostridium butyricum, marine red yeast and marine purple non-sulfur bacteria, the risk of diseases and insect pests in the process of chlorella cultivation in seawater can be effectively suppressed, the harm thereof can be reduced, and the production capacity and output of chlorella factory cultivation can be effectively improved.

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FUSION CONSTRUCTS TO EXPRESS BIOPHARMACEUTICAL POLYPEPTIDES IN CYANOBACTERIA

Publication No.: US2022372499A1 24/11/2022

Applicant:

UNIV CALIFORNIA [US]

AU_2020344678_PA

Absstract of: US2022372499A1

This invention provides compositions and methods for providing high product yield of transgenes encoding biopharmaceutical polypeptides in cyanobacteria and microalgae.

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CYANOBACTERIAL HOSTS AND METHODS FOR PRODUCING CHEMICALS

Publication No.: US2022372427A1 24/11/2022

Applicant:

UNIV FLORIDA [US]

US_2021087522_A1

Absstract of: US2022372427A1

The present invention relates to recombinant cyanobacterial cells for the production of a chemical compound of interest. In particular, the present invention relates to genetic modifications that introduce one or more heterologous phosphopantetheinyl transferases (PPTases) into a cyanobacterial cell. These cells can, optionally, further comprise heterologous carrier protein and nucleic acid constructs that provide the cyanobacterial cells with the capability of producing chemicals of interest or compounds of interest, such secondary metabolites polyketides, nonribosomal peptides and their hybrids, the three major families of bioactive natural products, of cyanobacteria and other bacterial phyla, secondary metabolites analogs, and unnatural compounds.

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METHOD FOR PRODUCING BIOMASS FROM A MICROALGA

Publication No.: EP4092102A1 23/11/2022

Applicant:

UNIV DE LAS PALMAS DE GRAN CANARIA [ES]

WO_2021144491_A1

Absstract of: EP4092102A1

The invention relates to a method for producing biomass from a microalgae, wherein the method comprises culturing the microalgae in an effluent diluted in seawater, wherein the microalgae is selected from the group consisting of a strain of the genus Nodularia, a strain of the genus Chrysoreinhardia, a strain of the genus Halochlorella, and combinations thereof. The invention also relates to a method for remediating an effluent, wherein the method comprises culturing a microalgae of the invention in the effluent diluted in seawater.

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INDOOR AIR PURIFICATION SYSTEM USING MICROALGAE

Publication No.: WO2022239947A1 17/11/2022

Applicant:

ADVANCED INSTITUTE OF CONVERGENCE TECH [KR]

KR_102364640_B1

Absstract of: WO2022239947A1

The present invention relates to an indoor air purification system using microalgae. More specifically, the present invention relates to an indoor air purification system using novel microalgae, the system utilizing the abilities to remove, from fine dust of the microalgae, water-soluble contaminants such as nitrogen oxides, sulfur oxides and ammonium, and carbon dioxide, and release oxygen. The indoor air purification system using microalgae, according to the present invention, circulates indoor air through the present system by continuous aeration and, if the indoor air passes through the system, microalgae can reduce hazardous substances such as ultrafine dust, fine dust, VOCs and CO2 in the air, and produces refreshing indoor air through the generation of oxygen, which is beneficial to the human body, and maintenance of humidity. In addition, the indoor air purification system using microalgae, according to the present invention, can change the color of indoor lighting according to the type of microalgae to be used, and thus can be applied to various interior lighting and the like.

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CO-EXTRACTION OF HYDROPHILIC AND HYDROPHOBIC ACTIVE COMPOUNDS FROM MICROALGAE AND MACROALGAE

Publication No.: WO2022238661A1 17/11/2022

Applicant:

ALGAMA [FR]
AVIGNON UNVERSITE [FR]

FR_3122808_PA

Absstract of: WO2022238661A1

The present patent application relates to a method for obtaining an aqueous extract from at least two algae (microalgae and/or macroalgae), allowing a better yield in the extraction of hydrophilic and hydrophobic compounds from said algae. Additionally, the invention relates to said aqueous extracts, as well as to the use thereof in the prevention of cardiovascular disease, and as a functional ingredient in food, in particular in food supplements.

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PROCESS FOR EXTRACTION OF NUTRACEUTICAL COMPOUNDS FROM MICROALGAE BY USING CO2 IN SUPERCRITICAL CONDITIONS

Publication No.: US2022364015A1 17/11/2022

Applicant:

NEXTCHEM S P A [IT]

CN_114340405_PA

Absstract of: US2022364015A1

A process that allows the extraction of compounds of nutraceutical interest (specifically omega-3 and carotenoids) from microalgae and their separation through the use of CO2 in supercritical conditions (and when necessary a co-solvent), at the same time, wherein the removal of an unwanted component (tripalmitin) from the lipid extract, always by using supercritical CO2 in a fractional extraction, is advantageously carried out using its different extraction kinetics respect to the component present in the lipid phase.

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DRUG-CARRYING SYSTEM, PREPARATION METHOD THEREFOR, AND PHARMACEUTICAL COMPOSITION

Publication No.: WO2022237466A1 17/11/2022

Applicant:

SHENZHEN SECOND PEOPLES HOSPITAL SHENZHEN INST OF TRANSLATIONAL MEDICINE [CN]

CN_113181119_A

Absstract of: WO2022237466A1

A drug-carrying system, a preparation method therefor, and a pharmaceutical composition. The drug-carrying system comprises a carrier, a vesicle made of a cell membrane, and cyanobacteria embedded in the vesicle. The carrier comprises a drug-carrying portion and an embedded membrane portion connected to the drug-carrying portion, the embedded membrane portion being embedded in the vesicle, and the drug-carrying portion being located outside the vesicle. The drug-carrying system has good biocompatibility, targeted delivery, and oxygen-producing longevity, and can ameliorate the problem that the oxygen-producing time of oxygen-supplying materials used for hypoxic tissue is short and requires uninterrupted administration.

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FISH AND SEAFOOD SUBSTITUTE MADE FROM FIBROUS MYCELIUM AND MICROALGAE AND METHODS OF PRODUCTION THEREOF

Publication No.: EP4088585A1 16/11/2022

Applicant:

STEDMAN MICHAEL PHEROZE [GB]

Absstract of: EP4088585A1

The present invention relates to a non-animal fish and seafood replacement product for human consumption, comprising a composition of a fibrous mycelium mass of at least one edible fungal strain in the range of 0.5 wt% to 99.5 % wt%, water in the range of up to 99.5 wt% and an edible micro- or macroalgae or parts thereof, wherein the edible micro- or macroalgae or the parts thereof and the fibrous mycelium mass were incubated together in a growth medium for the edible fungal strain.Furthermore, the invention relates to methods of producing a non-animal fish and seafood replacement product or food supplement for human consumption, comprising the steps of incubating a composition of mycelia of at least one edible fungal strain and edible micro- or macroalgae or parts thereof in a liquid growth medium, culturing the composition under conditions that allow growth of the mycelia to produce a fibrous mycelium mass, and separating the fibrous mycelium mass of the edible fungal strain from the edible micro- or macroalgae or parts thereof after completion of the growth of the mycelia to obtain the non-animal fish and seafood replacement product or food supplement for human consumption.

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Composition for treating contaminated water containing microalgae as an active ingredient and its use

Publication No.: KR20220152129A 15/11/2022

Applicant:

KYUNGPOOK NAT UNIV IND ACADEMIC COOP FOUND [KR]

Absstract of: KR20220152129A

본 발명은 다양한 하수 조건에서 매우 효율적으로 다량의 영양분을 소비하고 빠른 성장을 하는 클로렐라 속(Chlorella spp.)과 데스모데스무스 속(Desmodesmus spp.)을 통해 높은 영양염, 이온 및 금속원소가 포함된 역삼투 농축수를 비롯한 오염수를 처리하는 동시에 바이오 연료를 생산하는 친환경적인 수처리 방법을 제공하는 것이다.

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Outdoor large-scale microalgae culture device

Publication No.: CN115340928A 15/11/2022

Applicant:

INST OF HYDROBIOLOGY CHINESE ACADEMY OF SCIENCES

Absstract of: CN115340928A

The invention discloses an outdoor large-scale microalgae culture device which comprises a culture main body box and an equipment cabinet, the culture main body box comprises a box body, an electric awning and air stones, and the electric awning is mounted at the top of the box body; the equipment cabinet comprises a cabinet body, a solar panel, an air pump, a water pump, a logic controller and a lithium battery. The side wall of the cabinet body is provided with a power interface. The open side of the box body and the open side of the cabinet body are connected into a whole through a partition plate. An illumination sensor is mounted on the solar panel; the solar panel is electrically connected with the lithium battery; the illumination sensor is connected with the electric awning in series and is connected with the air pump and the water pump in parallel to form a circuit I; the lithium battery and the power interface are connected in parallel to form a circuit II; the circuit I, the circuit II and the logic controller are connected in series. The device can automatically control light, ventilate and increase water disturbance to prevent natural sedimentation of algae, and is simple in structure, convenient to carry, capable of reducing the light source and carrying cost, capable of increasing the yield and long in service life.

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Method for improving microalgae sugar production by using microalgae-fungus symbiont

Publication No.: CN115341003A 15/11/2022

Applicant:

HARBIN INSTITUTE OF TECH

Absstract of: CN115341003A

The invention relates to a method for improving sugar production of microalgae, in particular to a method for improving sugar production of microalgae by utilizing a microalgae-fungus symbiont. The invention aims to solve the problem of high fuel ethanol preparation cost caused by low sugar content in the existing microalgae. The method comprises the following steps: step 1, adding chlorella into a sterilized BG-11 culture medium; step 2, adding fungi into the sterilized YM culture medium; step 3, mixing the chlorella solution obtained in the step 1 and the fungus solution obtained in the step 2 with livestock and poultry tail water, and putting the mixture into a photobioreactor; 4, collecting effluent of the photobioreactor in the step 3 on the 0th day, the 2nd day and the 5th day respectively; 5, taking 10mg of the sample acquired in the step 4, and recording the weight; and 6, analyzing the concentrations of glucose, xylose and arabinose in the step 5 by adopting a high performance liquid chromatograph-differential detector, and preparing an 87H3 chromatographic column. The invention belongs to the technical field of biological environmental protection and biological energy.

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NOVEL MICROALGAL STRAINS OF THRAUSTOCHYTRIUM GENUS, AND METHOD OF PRODUCING POLYUNSATURATED FATTY ACIDS USING THE SAME

Publication No.: MY194114A 14/11/2022

Applicant:

CJ CHEILJEDANG CORP [KR]

RU_2754686_C1

Absstract of: MY194114A

The present disclosure relates to strains of Thraustochytrium genus, including a high content of polyunsaturated fatty acids, and a method of producing a biomass using the same. According to the novel CJM01 microalgae of Thraustochytrium genus of the present disclosure, the content of lipids in the biomass and the content of unsaturated fatty acid such as docosahexaenoic acid in the biomass are high, so that the microalgae itself, a biomass produced by the culturing and fermentation of microalgae, a condensate of the biomass, and a dried product of the biomass are very useful as a feed composition.

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Combined heat and power system and method integrating wind energy and wave energy

Publication No.: CN115324677A 11/11/2022

Applicant:

HUADIAN ELECTRIC POWER RES INSTITUTE CO LTD

Absstract of: CN115324677A

The invention discloses a cogeneration system and method integrating wind energy and wave energy, and relates to the field of carbon emission reduction, and the cogeneration system comprises a CO2 production system, a CO2 compression system and a thermoelectric generation system. According to the invention, CO2 generated by respiration of microalgae at night is heated and stored as a working medium for supercritical CO2 power generation, and the CO2 is subjected to multi-stage compression by utilizing wave energy and natural wind power, so that the wave energy and the wind power are effectively utilized. Meanwhile, cyclic utilization of substances is achieved, O2 generated by photosynthesis of microalgae in the daytime can be used for breathing at night, and CO2 generated at night can be used as a reactant for photosynthesis in the daytime. And meanwhile, the high-pressure turbine exhausts air from the middle to supply heat to users, output high-temperature and high-pressure CO2 can be used for heating low-temperature CO2, gradient utilization of waste heat is achieved, and the heat efficiency of the system is greatly improved.

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Large photobioreactor for microalgae culture

Publication No.: CN115322871A 11/11/2022

Applicant:

BEIJING XIZAO HUANNENG TECH CO LTD

Absstract of: CN115322871A

The invention discloses a large photobioreactor for microalgae culture. The reactor comprises a photoreaction device, and microalgae are subjected to photosynthesis in the photoreaction device for reproduction; the algae liquid in the photoreaction device is filtered through the algae liquid circulating system to produce algae mud, and the algae mud returns to the photoreaction device; the CO2 supplementing and circulating system is used for enabling fresh CO2 and reacted CO2 to enter the photoreaction device to participate in microalgae breeding; the underwater illumination system is positioned in the photoreaction device and is used for providing required illumination for photosynthesis of the microalgae; and the nutrient substance supplementing system is used for providing nutrient substances for microalgae breeding. The photobioreactor disclosed by the invention has the advantages of high photoreaction efficiency, low energy consumption, capability of resisting adhesion in organisms and the like.

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Application of scenedesmus to inhibition of harmful algae in algal bloom

Publication No.: CN115321685A 11/11/2022

Applicant:

ZHEJIANG OCEAN UNIV

Absstract of: CN115321685A

The invention relates to an application of Scenedesmus.sp in inhibition of algal bloom harmful algae, the Scenedesmus.sp is preserved in China Center for Type Culture Collection (CCTCC), the preservation number is CCTCC NO: M 2022183, the preservation date is March 2, 2022, and the preservation address is Wuhan University, Wuhan, China. The scenedesmus disclosed by the invention is newly found and separated microalgae in a culture water body, is a scenedesmus family of chlorophyta, is free of cytotoxin, has a certain effect in water body self-purification and sewage purification, and does not generate secondary pollution. Effective components in secondary metabolites of scenedesmus and allelochemicals secreted by the scenedesmus serve as biological secondary metabolites, have the advantages of being easy to degrade, low in toxic and side effects and the like, can serve as a safe ecological algae control technology and can be directly applied to target algae, and a new biological ecological method is provided for algal bloom treatment.

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Device for continuously separating and collecting microalgae by using magnetic nanoparticles

Nº publicación: CN115322897A 11/11/2022

Applicant:

XUZHOU INSTITUTE OF TECH

Absstract of: CN115322897A

The invention discloses a device for continuously separating and collecting microalgae by using magnetic nanoparticles. The device comprises a water pump, a mixing system, a separating system, a collecting system and a control system, the mixing system comprises a water storage tank, a stirring device arranged in the water storage tank and a magnetic nanoparticle storage and release device arranged above the water storage tank; the separation system comprises a U-shaped separation tank, a scraper blade and a driving device, the U-shaped separation tank is obliquely arranged, and the two ends of the U-shaped separation tank communicate with the water storage tank through hoses correspondingly; and the two microalgae collecting tanks are respectively positioned right below the joints of the semicircular separating tanks and the straight pipes. The magnetic nanoparticles are combined with the microalgae under the action of a magnetic field, so that the microalgae are separated from the water-algae mixed solution. Under the action of an external magnetic field, in the directional movement process of the magnetic-algae mixture, a conjugate is adsorbed on a pipe wall, and finally, collection is completed by scraping of a scraper, so that algae-water separation is realized. The whole device can operate without adding a flocculating agent, can realize fine control, and has the advantages of high efficiency, low energy consumption, economy and applicability.

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