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A method for resource extraction and recovery of phosphorus in algae biomass waste

A biomass waste and recycling technology, which is applied in the field of phosphorus resource extraction and recycling in algal biomass waste, can solve the problems of difficult, difficult to degrade phosphorus wall-breaking release, easy phosphorus loss and selective recovery efficiency, etc. , to achieve the effect of highly selective extraction and recovery

Active Publication Date: 2020-09-15
CHINA AGRI UNIV
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  • Application Information

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Problems solved by technology

[0007] Aiming at the problems of low efficiency and poor selectivity in the recycling process of phosphorus resources from algae biomass waste, the present invention provides a method for resource extraction and recovery of phosphorus in algae biomass waste, using ultrasonic / hydrothermal integration technology, To overcome the problems of difficult degradation of algae biomass waste and difficult release of phosphorus through wall breaking, use magnesium-loaded hydrothermal carbon adsorption recovery technology to overcome the problems of easy loss of phosphorus in the liquid phase and low selective recovery efficiency

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  • A method for resource extraction and recovery of phosphorus in algae biomass waste

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Experimental program
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Effect test

Embodiment 1

[0061] The algae biomass waste with a moisture content of 60% is introduced into the ultrasonic reactor, and a wall-breaking agent H with a volume ratio of 3% is added 2 o 2 , Regulating the volume of algae waste: ultrasonic reactor volume 1:3, pulsed ultrasonic reaction for 10 minutes (each pulse cycle includes 1 minute of operation and 2 minutes of stop), ultrasonic power 250W, ultrasonic frequency 40kHZ, temperature 30°C. Then introduce the treated algae biomass waste into the hydrothermal reactor, add catalyst NaOH (3mol / L) with a volume ratio of 10%, and regulate the volume of the reactant: the volume of the hydrothermal reactor is 1:3, and the temperature is under the condition of 75°C Reaction 60min. Phosphorus release rate is greater than 98%.

[0062] Then use a spiral solid-liquid separator (processing capacity 10m 3 / h, screen mesh 1.0mm, spindle speed 20r / min) to separate the treated algae biomass waste into solid and liquid, and introduce the liquid part into t...

Embodiment 2

[0066] The algae biomass waste with a water content of 90% is introduced into the ultrasonic reactor, and a wall-breaking agent H with a volume ratio of 4% is added. 2 o 2 , Regulate the volume of algae waste: ultrasonic reactor volume 2:3, pulsed ultrasonic reaction for 30 minutes (each pulse cycle includes running for 1 minute and stopping for 1 minute), ultrasonic power 50W, ultrasonic frequency 20kHZ, temperature 20°C. Then the treated algae biomass waste is introduced into the hydrothermal reactor, and the catalyst HCl (1mol / L) with a volume ratio of 5% is added to regulate the volume of the reactant: the volume of the hydrothermal reactor is 2:3, and the temperature is under the condition of 180°C React for 90 minutes. Phosphorus release rate is greater than 99%.

[0067] Then use a spiral solid-liquid separator (processing capacity 2m 3 / h, screen mesh 0.3mm, spindle speed 10r / min) to separate the treated algae biomass waste into solid and liquid, and introduce the l...

Embodiment 3

[0071] Introduce the algae biomass waste with a moisture content of 70% into the ultrasonic reactor, and add a wall-breaking agent H with a volume ratio of 5% 2 o 2 , Regulating the volume of algae waste: ultrasonic reactor volume 1:3, pulsed ultrasonic reaction for 20 minutes (each pulse cycle includes 2 minutes of operation and 2 minutes of stop), ultrasonic power 150W, ultrasonic frequency 60kHZ, temperature 40 ℃. Then introduce the treated algae biomass waste into the hydrothermal reactor, add catalyst NaOH (5mol / L) with a volume ratio of 1%, and regulate the volume of the reactant: the volume of the hydrothermal reactor is 2:3, and the temperature is under the condition of 100°C React for 120min. Phosphorus release rate is greater than 98%.

[0072] Then use a spiral solid-liquid separator (processing capacity 20m 3 / h, screen mesh 0.5mm, spindle speed 30r / min) to separate the treated algae biomass waste into solid and liquid, and introduce the liquid part into the int...

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Abstract

The invention provides a method for resource extraction and recovery of phosphorus from algal biomass waste. Rapid degradation of the algal biomass waste and efficient release of phosphorus are realized with an ultrasonic / hydrothermal integration technology, the phosphorus release rate is higher than 98%, high-selectivity extraction and recovery of phosphorus in a liquid phase are realized with a magnesium-based hydrothermal carbon adsorption technology, and the phosphorus adsorption efficiency is higher than 97%. With adoption of the method for resource extraction and recovery of phosphorus from the algal biomass waste, phosphorus in the algal biomass waste can be extracted and recovered efficiently, and the recovery rate of phosphorus is higher than 95%.

Description

technical field [0001] The invention belongs to the technical field of agricultural resources and environment, and in particular relates to a method for resource extraction and recovery of phosphorus in algae biomass waste. Background technique [0002] With the intensification of eutrophication in water bodies and the rapid development of algae biomass refining projects, more and more algae biomass wastes have caused great negative impacts on the environment because they have not been properly and scientifically disposed of. The accumulated algae biomass waste, on the one hand, will produce odor pollution due to the biodegradation process, and even flow into the water body to pollute the water environment; biological health. At the same time, algae biomass waste is a phosphorus-rich resource. Due to the growth environment and its own structural functions, algae can easily enrich phosphorus in the environment. At present, my country's phosphate rock resources are scarce, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/80C05G3/40B01D15/08C12N1/06
CPCB01D15/08C05D5/00C05G3/80C12N1/06C05F11/00
Inventor 张涛邓雅馨
Owner CHINA AGRI UNIV
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