China's algae biomass crosses low conversion rates
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On October 25th, it was learned from the Ningbo Institute of Materials, Chinese Academy of Sciences that the Algae Resources Research Team of the Institute of New Energy Technology under the Institute has initially conquered the problem of low biomass conversion rate in the production of fuel ethanol from seaweed biomass, and can use at least 50% of the seaweed The conversion of major biomass components into fuel ethanol produces at least 200 kg of fuel ethanol per ton of large-scale seaweed (dry weight), which is at the leading level in the international research field of the same type.
The person in charge of the research team told the reporter that in early 2010, after the establishment of the Algae Resources Research Team of the Ningbo Materials Research Institute of the Chinese Academy of Sciences, it focused on the selection of strains for fermentation, seaweed biomass pretreatment, and fermentation processes, and currently has a highly efficient fermentation strain. 2 Strain, and developed a targeted process for different seaweed species. Various other phased results are being organized. At present, the research group is actively preparing to build a pilot plant. The next step is to apply this laboratory result to actual production as soon as possible and strive to achieve mass production.
It is understood that the use of marine macroalgae to produce fuel ethanol is superior to the terrestrial crops such as corn and other raw materials such as starches and celluloses. First, it has higher yield, shorter growth cycle, faster reproduction, and does not occupy cultivated land. The second is low production cost, high carbohydrate content, hardly degradable lignin, easy to be crushed and dried, relatively low requirements for processing and processing conditions; third, stable source of raw materials; Material fuel oil has a high calorific value, averaging as much as 33 megajoules per kilogram, which is 1.6 times that of wood or crop stalks. Fifth, environmental benefits are more prominent.
China has at least 3 million square kilometers of sea area. If large-scale seaweeds are cultivated in coastal and inland waters, the production scale of biodiesel can reach tens of millions of tons; the area of ​​saline-alkali land in China can reach 150 million mu, if we use 14% saline-alkali land to cultivate micro-organisms. Algae, under the conditions of mature technology, can meet the demand for 50% of the country's diesel, and the market prospect is very broad.
It is also known that many international large-scale petrochemical companies such as Exxon, DuPont and Dow Chemical are very optimistic about this technology and have carried out related technologies and trials. Exxon even invested US$600 million in this technology. Huge investment. However, overall, the technology is still in the initial stage of industrial development. The main problem is that the industrial application cost is too high, and there is no industrial design that has advantages. The implementation of large-scale industrial production still needs time. The development of biofuel technology for seaweed production in China is basically in sync with the world. The domestic research institutes represented by the Chinese Academy of Sciences have achieved many important results.
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