Method for anaerobic fermentation of bloom blue algae

A cyanobacterial bloom and anaerobic fermentation technology, applied in biological sludge treatment, waste fuel, etc., can solve the problems of gas production failure, affecting the effective volume of anaerobic digester, low gas production efficiency, etc. The effect of prolonging the acidification time of cyanobacteria and increasing the effective volume

Inactive Publication Date: 2011-09-14
JIANGSU ACAD OF AGRI SCI
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Problems solved by technology

In the actual project operation, the effective volume of the anaerobic digester will be affected due to the expansion of cyanobacteria, and the gas production efficiency will be low due to the floating of cyanobacteria, and even gas production failure will occur.

Method used

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  • Method for anaerobic fermentation of bloom blue algae
  • Method for anaerobic fermentation of bloom blue algae
  • Method for anaerobic fermentation of bloom blue algae

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1) Design of baffle-type acidification tank: divide the existing one-format acidification tank into 3 grids, leave a flat gap between the grids, and the flat gap 4 between the first grid 1 and the second grid 2 is far away from the feed port 6 At the other end, the flat gap 5 between the second grid 2 and the third grid 3 is located at the same end of the first grid feed 6, so that the bloom cyanobacteria is in the form of deflection when flowing in the acidification pond.

[0022] 2) Improved design of agitated anaerobic digester: add one or several agitators 8 to the upper part of the ordinary agitated anaerobic digester to ensure that the water bloom cyanobacteria floating on the upper part can be fully mixed with the bottom sludge to further The material 9 enters from the bottom of the pond, while the biogas slurry outlet 10 is set in the middle of the digester.

[0023] Example 1

[0024] The volume of the anaerobic digester is 80m 3 , the pool type is an improve...

Embodiment 2

[0026] The volume of the anaerobic digester is 80m 3 , the pool type is an improved stirring digester. Under the condition of 25 ℃, the design residence time is 15 days, and it can handle 5 tons of blooming blue-green algae (about 5m 3 . The acidification pool is designed as a baffle type in 3 formats ( figure 1 ), the effective volume of each grid is 5m 3 . Pump the salvaged bloom cyanobacteria into the transport vehicle, transport it to the cyanobacteria anaerobic fermentation treatment site, put the cyanobacteria into one end of the first compartment of the acidification tank, and transport one vehicle per day, each vehicle is 5 tons, when entering The cyanobacteria bloom in the 1st grid exceeds 5m 3 Finally, the blooming cyanobacteria overflows to the second grid through a flat gap at the other end of the first grid, and when the second grid is full, it overflows to the second grid through the flat gap at the other end opposite to the flat gap between the first and sec...

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Abstract

The invention relates to a method for the anaerobic fermentation of bloom-forming cyanobacteria, and belongs to the technical field of the agricultural environmental protection. The method comprises the following steps: pumping the bloom-forming cyanobacteria to a zigzag type acidification pool; and pumping the bloom-forming cyanobacteria after being subjected to acidification treatment to an agitating type anaerobic digestion tank after being improved, so as to generate marsh gas after the anaerobic fermentation. Through combining the promotion or unload or transportation process of the bloom-forming cyanobacteria with deswelling treatment, the investment of a deswelling dedicated device is reduced; the cost is reduced; the effective volume of the subsequent anaerobic digestion tank is improved through the mechanical action of a pump and the extension of the acidification time of the cyanobacteria; and the retention time of the bloom-forming cyanobacteria in the anaerobic digestion tank is shortened; through adding an agitator at the upper part of the digestion tank, the bloom-forming cyanobacteria and sludge at the bottom are fully in contact mixture, thereby increasing the gas production rate of the volume and the organic load, and improving the running efficiency of engineering.

Description

Technical field: [0001] The invention relates to a method for anaerobic fermentation of blue-green algae, which is a technology for harmless treatment and resource utilization of blue-green algae, and belongs to the technical field of agricultural environmental protection. Background technique: [0002] Affected by industrial wastewater and domestic sewage discharge and agricultural non-point source pollution, the eutrophication of water bodies is increasing day by day. The serious pollution and unsafeness of drinking water have caused the water body to lose its original ecological, entertainment, sightseeing and other functions, which in turn has caused ecological disasters. The attention of the department and the general concern of the people. [0003] Salvage is an important measure to eliminate algae bloom pollution in inland water bodies, and it has been applied in Dianchi Lake in Yunnan, Taihu Lake in Jiangsu, and Chaohu Lake in Anhui in my country. During the peak s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/04
CPCY02E50/343Y02E50/30
Inventor 常志州杜静叶小梅黄红英马艳张建英
Owner JIANGSU ACAD OF AGRI SCI
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