53 results about "Acidithiobacillus" patented technology

The present invention discloses a new type of biofuel cell, based on the microbial regeneration of the oxidant, ferric ions. The bio-fuel cell is based on the cathodic reduction of ferric to ferrous ions, coupled with the microbial regeneration of ferric ions by the oxidation of ferrous ions, with fuel (such as hydrogen) oxidation on the anode. The microbial regeneration of ferric ions is achieved by chemolithotrophic microorganisms such as Acidithiobacillus ferroxidans. Electrical generation is coupled with the consumption of carbon dioxide from atmosphere and its transformation into microbial cells, which can be used as a single-cell protein.

The invention discloses an acidophilic iron-oxidizing composite microbial agent which comprises the following communities: a ferroplasma acidiphilum-containing strain, an acidithiobacillus ferrivorans-containing strain, an acidithiobacillus ferrooxidans-containing strain, a leptospirillum ferriphilum-containing strain and a sulfobacillus acidophilus-containing strain, wherein a preparation method of the composite microbial agent comprises the following steps: the aforementioned five strains are placed in a specific basic iron salt / nutrient-containing culture medium, and are subjected to the temperature gradient compounding culture, tolerance mixed-heavy-metal gradient pressure type domestication, temperature cycling gradient type domestication, ferrous oxidation activity improvement and tolerance high-iron domestication, so as to obtain the acidophilic iron-oxidizing composite microbial agent. According to the invention, the acidophilic iron-oxidizing composite microbial agent is simple in formulation, economical, adaptable, versatile and efficient, and can be used for the efficient extraction of heavy metals in electroplating sludge.

The invention relates to Acidithiobacillus thiooxidans and a heap leaching technology using same of the middle-grade and low-grade phosphate ore. The name of the bacteria is Acidithiobacillus thiooxidans RETECH-PS1; the bacteria are conserved in the China center for type culture collection of which address is the Wuhan University; the conservation date is April 25, 2009; and the CCTCC NO is 209088. The biological heap leaching technology of the middle-grade and low-grade phosphate ore comprises the following steps: ores are crushed to less than 15mm, sulfur is added to mix and build up leaching heap; (2) the Acidithiobacillus thiooxidans in the claim 1 which is conserved at low temperature is activated and propagated step by step to reach the bacterium solution volume for spraying, finally the bacteria are inoculated in the middle-grade and low-grade phosphate ore heap mixed with sulfur; and (3) leachate is collected by a collection pool and pumped by a pump to a spraying system for circular spraying. The invention has the following advantages: the process flow is simple, the middle-grade and low-grade phosphate ore is used without adopting ore dressing and enrichment; sulfuric acid is not added in the production process of phosphoric acid, thus reducing the cost and avoiding the environmental pollution problem caused by the production of sulfuric acid; the production scale can be large or small; and the technology is especially suitable for the collophanite resource which accounts for 70% of Chinese phosphorus resources and is difficult to treat through traditional ore dressing, thus increasing the comprehensive utilization rate of Chinese phosphorus resources.

The invention belongs to the technical field of microbe, and particularly relates to a method for treating radionuclide plutonium or strontium polluted soil by microbe. The method comprises the following steps: screening the plutonium or strontium polluted soil by a bar screen, a double-plate screen and a spiral screen, wherein the soil grains with the granularity of more than 0.25 millimeter areclean soil grains and the soil grains with the granularity of less than 0.25 millimeter are plutonium or strontium polluted soil grains; and mixing the soil grains with the granularity of less than 0.25 millimeter and acidithiobacillus thiooxidans active solution, filtering the solution to obtain sediment which is clean soil, mixing the filtered solution and sulfate reducing bacteria active solution, settling plutonium or strontium, filtering and separating the solution, reclaiming the plutonium or the strontium, and recycling the water. The method of the invention has the advantages of simple and convenient operation, economy and feasibility and high safety, has no secondary pollution, and can efficiently and quickly remove the plutonium or the strontium from the polluted soil.