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Method and device for making hydrogen using sewage plant residual mud to produce anaerobic fermentation

A technology of anaerobic fermentation and excess sludge, applied in fermentation, waste fuel, etc., can solve problems such as hydrogen consumption

Inactive Publication Date: 2005-05-25
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for producing hydrogen by anaerobic fermentation of residual sludge in sewage plants, through the sludge alkali pretreatment to melt the cells and control the anaerobic fermentation under the condition of high pH, ​​the continuous fermentation of sludge is realized Hydrogen production, thus solving the problem of hydrogen consumption in the process of sludge fermentation hydrogen production, which is conducive to the realization of continuous sludge fermentation hydrogen production

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  • Method and device for making hydrogen using sewage plant residual mud to produce anaerobic fermentation

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Embodiment 1

[0022] Concentration is that 10.36g / l residual activated sludge 50ml is packed under the alkaline condition that initial pH=11.0 directly regulates initial pH=11.0 with NaOH and packs in the serum bottle that total volume is 125ml, flushes pure nitrogen wherein to drive away the oxygen wherein, control temperature is 36°C, 150rpm, after 24-30 hours of anaerobic fermentation, the maximum hydrogen production rate can be obtained as 9.13LH 2 / kg-TS or 16.23LH 2 / kg-VS.

Embodiment 2

[0024] First, 50ml of excess activated sludge with a concentration of 12.60g / l was adjusted to pH = 12.0 with NaOH, treated with alkali at room temperature for 24 hours, then the initial pH value of the sludge was adjusted to 11.0, and the total volume was loaded into a serum bottle of 125ml , pour pure nitrogen into it to drive out the oxygen in it, control the temperature at 36°C, 150rpm, and get the maximum hydrogen production rate of 16.59LH after 24-30 hours of anaerobic fermentation 2 / kg-TS or 29.36LH 2 / kg-VS.

Embodiment 3

[0026] see figure 1 . At first the surplus activated sludge that concentration is 15.47g / l imports in sludge alkali treatment reactor 2 with sludge delivery pump 1, in this reactor 2, the pH=12.0 of sludge, process 24 hours at room temperature, then take 2.5 liters of sludge after treatment, adjust the sludge pH value to 11.0, put it into a closed sludge hydrogen production reactor 3 with a total volume of 3 liters, and fill the reactor 3 with nitrogen to drive away the oxygen therein. The temperature was controlled at 36°C, and after 24-30 hours of anaerobic fermentation, 379.93mlH 2 , the hydrogen production rate is 12.28LH 2 / kg-TS or 21.53LH 2 / kg-VS.

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Abstract

A process for generating H2 from the residual mud of sewage treating works include using alkali to regulate the pH value of active mud to 12-13, stirring, pumping it into the reactor, filling N2 for displacing O2, and anaerobic fermenting at 20-55 deg.C for generating H2. Its apparatus is composed of alkali-treating reactor, anaerobic fermenting and hydrogene generating reactor, acidity control system and gas collecting system.

Description

technical field [0001] The invention belongs to the technology of using anaerobic fermentation to treat residual activated sludge in the biological treatment process of a sewage treatment plant to produce hydrogen, in particular to a method of pretreating sludge by adding alkali and controlling anaerobic fermentation to produce hydrogen under alkaline conditions . [0002] The invention also relates to a device for implementing the above method. Background technique [0003] The world today is facing two challenging issues of energy shortage and environmental pollution. At present, about 80% of the world's energy depends on fossil fuels, such as oil, natural gas and coal. However, the reserves of these energy substances are very limited and the use of them will cause the deterioration of the global environment. Therefore, seeking a clean and renewable energy source to replace fossil fuels has become a research hotspot around the world. As a clean and pollution-free green...

Claims

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Application Information

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IPC IPC(8): C12P3/00
CPCY02E50/30
Inventor 刘俊新蔡木林
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI