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Algal residue and livestock/poultry feces coupled anaerobic fermentation method for producing hydrogen

A technology for livestock and poultry manure and anaerobic fermentation, applied in the direction of fermentation, can solve problems such as environmental pollution, and achieve the effects of improving hydrogen production, easy operation and control, and shortening start-up time.

Inactive Publication Date: 2012-11-07
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

However, with the research and promotion of microalgae biodiesel technology, the large amount of algal residue remaining after water pollution control and oil extraction will inevitably cause serious environmental pollution problems if discarded or stored randomly. High-value comprehensive utilization of algal residue resources It has become a key problem to be solved in the process of industrial application of microalgae biodiesel

Method used

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  • Algal residue and livestock/poultry feces coupled anaerobic fermentation method for producing hydrogen
  • Algal residue and livestock/poultry feces coupled anaerobic fermentation method for producing hydrogen

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Effect test

Embodiment 1

[0040] 1. Substrate pretreatment

[0041] The dried algae powder was extracted with diethyl ether-petroleum ether as the extraction agent, the volume ratio of diethyl ether and petroleum ether was 1:1, and the temperature was extracted at 30°C for 4 hours. The algae were collected by centrifugation and dried at 105°C for later use. The algae residue and pig manure were respectively placed in a microwave generator at 200w for 30 minutes (the treatment time was controlled in a state where the algae residue and pig manure had not been carbonized), and cooled to room temperature after taking it out. Use 5 mol / L hydrochloric acid to adjust the pH of the substrate to 3, and after acidification for 24 hours, wash until the pH reaches 6.

[0042] 2. Activated sludge screening and domestication

[0043] The activated sludge from the pig manure anaerobic digester was passed through a 50-mesh sieve to remove large particles, and most of the methanogens were removed through acidification...

Embodiment 2

[0048] Using prokaryotic chlorella with autotrophic and heterotrophic dual growth capabilities, first obtain high-concentration algae liquid under heterotrophic culture conditions. After the concentration of algae liquid reaches 40g / L, it is centrifuged and freeze-dried to obtain chlorella algae powder. The dried algae powder was broken down by ultrasonic waves, and diethyl ether-petroleum ether (volume ratio: 2:1) was used as the extractant, extracted at 35°C for 4 hours, and the algae were collected by centrifugation and dried at 105°C for later use. The chlorella residue and pig manure (mass ratio 2:1) were placed in a microwave generator at 600w and treated for 10 minutes (the algae residue and pig manure could not be carbonized), and then the pH value of the substrate was adjusted to 3. After acidification treatment for 24 hours, wash to pH 6. Insert the acclimated activated sludge into the pretreated chlorella residue and pig manure mixed substrate, the inoculation amoun...

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Abstract

The invention relates to an algal residue and livestock / poultry feces coupled anaerobic fermentation method for producing hydrogen. Algal residue and livestock / poultry feces as substrate are processed by microwaves, cooled and then added with inorganic acid, so that the pH value of the substrate is 2 to 5 and the substrate is acidified, and the acidified substrate is washed until the pH value is 6 or 7, and is then dried; the weight ratio of the algal residue to the livestock / poultry feces is 1:1 to 10:1, and the algal residue and the livestock / poultry feces are mixed, then added into 10 to 30 percent by weight of acclimated activated sludge and fermented in an anaerobic environment under the temperature being 30 DEG C to 50 DEG C and pH equal being 5 to 7 to produce hydrogen. According to the method, the advantages of the algal residue left over after the preparation of biodiesel and the livestock / poultry feces are complemented, the reaction conditions are mild, energy consumption is low, the output of hydrogen is great, the delay time is short, and the problems of anaerobic fermentation, such as low hydrogen production efficiency and unstable hydrogen production process are effectively solved, the goals of emission reduction and productivity are achieved while the organic wastes are utilized at high value, renewable resource utilization, pollution abatement and hydrogen production are combined together, and the method important environmental benefit and a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of bioenergy, and relates to a new process for preparing clean hydrogen by anaerobic fermentation, and more specifically relates to a green method for preparing hydrogen by coupling algae residue and livestock manure to anaerobic fermentation. Background technique [0002] The increasing depletion of global non-renewable energy and environmental pollution pose a serious threat to human survival and sustainable development. The development of clean energy with high added value has become a research hotspot. As an efficient, clean and renewable energy, hydrogen has attracted increasing attention. Among various hydrogen production methods, biological hydrogen production has attracted the attention of researchers because of its environmental friendliness and low energy consumption. Among them, microorganisms can use organic waste and other biomass to produce hydrogen under anaerobic conditions, which has the adv...

Claims

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Application Information

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IPC IPC(8): C12P3/00
Inventor 席北斗贾璇夏训峰张列宇李晓光赵颖郭丽岗
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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