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Farmers in China have been concerned with the efficiency and utilization rate of fertilizers, because of the rigorous implementation of China’s “dual-reduction” plan, which calls for reducing fertilizer and pesticide usage. This study was aimed to improve the spreading performance and fertilizer distribution uniformity of an independently developed centrifugal variable-rate fertilizer applicator....
China enjoys rich lignite resources. However, the development and utilization level of lignite in China is low compared with other countries. The lignite in China is distributed mainly in the eastern areas of Inner Mongolia and in the northeast provinces. The characteristics of China's lignite are closely related to its coal-forming age. Due to the shallow buried coal seams, most parts of the lignite...
The water quality of lignite-derived water produced from Hot Press Upgrading (HPU) is in breach of the reuse standard for power plant's circulating cooling water. This study assesses the water characteristics of lignite-derived water as follows: The BOD5/COD ratio is 0.85. The pH value of lignite-derived water samples is from 6.65 to 6.85. The lignite-derived water's properties parameters such as...
An acetic acid microbial biosensor was developed for environmental monitoring. The microbial biosensor consisted of an immobilized cell membrane and an oxygen electrode. The results showed that the optimum pH of buffer solution was 6.48, the optimum temperature of buffer solution was 33°C and the optimum concentration of buffer solution was 0.01mol/L for acetic acid's determining. The linear range...
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