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Method for preparing biochar by using blue algae

A technology of biochar and cyanobacteria, which is applied in the fields of biofuels, chemical instruments and methods, special forms of dry distillation, etc., to achieve the effect of improving yield, stable properties, and alleviating the greenhouse effect

Inactive Publication Date: 2019-07-02
SUZHOU ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
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Problems solved by technology

[0004] At present, there is no method that can not only reduce environmental pollution, but also turn waste into treasure, and produce certain economic benefits. It is of great significance for the resource utilization of blue-green algae to prepare biochar by using blue-green algae as raw materials.

Method used

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Embodiment Construction

[0009] The technical solutions in the present invention will be clearly and completely described below in conjunction with specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0010] A method of using cyanobacteria to make biochar. First, salvage the cyanobacteria, filter the water, and squeeze it properly until no water drops appear in the hand. As a raw material, put the cyanobacteria that has been filtered out into a freeze dryer , freeze-dried at -20°C for 1-2 hours to make cyanobacteria freeze-dried powder, then put the cyanobacteria freeze-dried powder into a crucible, cover it, and carbonize it at a high temperature of 400°C-600°C for 3-5 hours. Put the blue-green algae into a gr...

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Abstract

The invention discloses a method for preparing biochar by using blue algae, which comprises the following steps: 1. preparing raw materials; 2. freeze-dry; 3. carbonization; 4. granulation. Biochar prepared by utilizing that method for preparing biochar from blue algae of the present invention is a carbon-rich solid by-product remaining after pyrolysis of biomass in an anaerobic or hypoxic state.Because of its high carbon content, well-developed pore structure and good corrosion resistance, it can retain water, nutrients, adsorb organic matter, heavy metals and other pollutants, and is an ideal soil improver and adsorbent, and can slow down greenhouse benefit, improve soil, increase crop yield and reduce environmental pollution. Biochar is an ideal adsorbent because of its well-developedpore structure and abundant surface functional groups, which can remove organic matter and heavy metals, especially heavy metals.

Description

technical field [0001] The invention relates to the technical field of production, in particular to a method for making biochar from blue algae. Background technique [0002] Cyanobacteria are single-celled aquatic organisms, and usually hundreds of cyanobacteria cells gather together. Because the cells contain air bubble nuclei, cyanobacteria can float on the water surface. When the cyanobacteria colony floating on the water surface proliferates to a certain extent, it will form a water bloom. Large-scale algal blooms are known as "green tides". Once the blue-green algae breaks out, it will not only damage the landscape and produce a foul smell, but also make many aquatic organisms unable to survive due to the damage to the aquatic environment and the competition mechanism, forming a vicious circle. In addition, some species of cyanobacteria (such as Microcystis) also produce cyanotoxin (MC), which is about 200 times more toxic than cyanic acid, which may affect human hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02B01J20/20B01J20/30
CPCB01J20/20C10B53/02Y02E50/10
Inventor 毛健杨代凤
Owner SUZHOU ACADEMY OF AGRI SCI
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