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Method for producing volatile short-chain fatty acids by using bloom-forming cyanobacteria

A technology of volatile fatty acids and short-chain fatty acids, which is applied in the field of algae resource treatment and disposal, can solve the problems of poor effect of volatile short-chain fatty acids, avoid mechanical dehydration energy consumption, increase carbon-nitrogen ratio, and increase production Effect

Pending Publication Date: 2020-02-21
HUNAN UNIV
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Problems solved by technology

The method is mainly based on calcium peroxide pretreatment technology, supplemented by rapid stirring, and finally anaerobic fermentation is carried out to produce volatile short-chain fatty acids, so as to solve the problem of poor effect of anaerobic fermentation of cyanobacteria to produce volatile short-chain fatty acids

Method used

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Effect test

Embodiment 1

[0017] A method for producing volatile short-chain fatty acids by blooming cyanobacteria is carried out according to the following steps: the salvaged and collected blooming cyanobacteria are concentrated and precipitated to a total solid content of 15000±600mg / L; then transferred to the pretreatment reaction tank and added Calcium peroxide is 10% (w / w) of the total solid content of cyanobacteria, and the rapid stirring at 200 rpm is carried out for 1 day; then it is transferred to the anaerobic fermentation tank, and the nitrogen is blown off for 5 minutes; then the volatile solid content of the inoculation is 20000±900mg / L anaerobic fermentation sludge, the inoculation amount is 15% (v / v) of the cyanobacteria mixture; then the fermentation tank is sealed, the fermentation temperature is controlled at 35±1°C, and the stirring intensity is set to 120rpm.

[0018] In the above treatment process, the soluble protein and sugar of cyanobacteria were increased by 4.1 times and 5.8 tim...

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Abstract

The invention provides a method for producing volatile short-chain fatty acids by using bloom-forming cyanobacteria, and belongs to the fields of algae resource treatment and disposal. The method mainly uses a calcium peroxide pretreatment technology and is assisted by rapid stirring, and finally uses anaerobic fermentation to produce the volatile short-chain fatty acids; and the method promotes the rupture of extracellular polymers and cell walls of the bloom-forming cyanobacteria and the release of intracellular organic matter, improves a carbon-nitrogen ratio in the fermentation process, greatly improves the yield of the volatile short-chain fatty acids in the cyanobacteria anaerobic fermentation process in a shorter period of time, avoids the production and accumulation of algal toxins, and realizes the reduction, harmlessness and resourceful treatment and disposal of the bloom-forming cyanobacteria.

Description

Technical field [0001] The invention relates to the field of algae resource treatment and disposal, in particular to a method for producing volatile short-chain fatty acids by using blooming cyanobacteria. Background technique [0002] With the further acceleration of the urbanization process, a large amount of nutrients such as nitrogen and phosphorus enter the lake, resulting in the increasingly serious eutrophication of the lake, the blooming of cyanobacteria in the lake, the large-scale blooming phenomenon, many famous freshwater lakes in my country such as Dianchi Lake, Taihu Lake, Chaohu and others are facing this problem. In order to solve this problem, researchers have developed many prevention and control measures, such as salvage, flocculation and algae control, and biological control of algae. These prevention and control measures have effectively inhibited the further outbreak of water blooms. However, if the salvaged or killed algae blooms and cyanobacteria are not s...

Claims

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Application Information

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IPC IPC(8): C12P7/54
CPCC12P7/54
Inventor 王冬波都明婷刘旭冉
Owner HUNAN UNIV
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