Development of a new type of composite microbial fertilizer using coal gangue
Coal gangue, as one of the largest industrial solid wastes in China in terms of annual emissions and cumulative stockpiling, has become an important topic at present. Beijing Forestry University, Shanxi Luan Mining Group, Lu'an Vocational and Technical College recently held a joint press conference announced that coal gangue compound microbial fertilizer was successfully developed in Changzhi City, Shanxi Province, of which green pepper, millet fertilizer formula has been successfully tested in the field.
At present, China's waste coal gangues account for 10% to 15% of the annual coal output, accounting for about 40% of the country's total industrial solid waste. The long-term open storage of large amounts of coal gangue causes environmental hazards. In recent years, foreign scientists have discovered that coal gangue contains a variety of microbial fertilizer components that are necessary for growing crops. In order to open up a new approach to the comprehensive utilization of coal gangue, Niu Yibiao, academician of the Chinese Academy of Engineering and director of the Institute of Optoelectronics of Shenzhen University, selected the coal gangue microbiological fertilizer research project to tackle the problem in 2002, and cooperated with Beijing Forestry University and Shanxi Panan Mining Group. Lu'an Vocational and Technical College cooperated to set up a research group.
After nearly three years of hard work, they screened out two strains that are suitable for producing bio-fertilizers on the basis of coal gangue, and successfully developed a production technology for coal gangue compound microbial fertilizers. It is understood that the research group has now produced 6 tons of coal gangue compound microbial fertilizers, and also developed green pepper, millet fertilizer formula.
Tested by the Grain Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture, the use of gangue compound microbiological fertilizers for green pepper, corn and millet increased by 9.3%, 0.4% and 10.3%, respectively, and the vitamin B1 content increased by 103.1%. The test results show that this fertilizer has the advantages of being non-toxic, harmless, non-polluting, broad spectrum, high quality, and high efficiency.
It is reported that the research group has submitted a patent application to the country and completed the feasibility study report on the use of coal gangue to produce a new type of biological fertilizer project. The industrialization of this technology will find a new way for the recycling and comprehensive utilization of coal enterprise waste and the development of ecological agriculture.
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