Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China; Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
Bioresour Technol. 2014 Sep;168:86-91. doi: 10.1016/j.biortech.2014.03.023. Epub 2014 Mar 13.
Rheological properties of corn stover substrate were investigated to explore agitation energy reduction potential for different total solid (TS) in anaerobic digestion. The effects of particle size and temperature on rheological properties and corresponding energy reduction were studied. The results indicated that corn stover slurry exhibited pseudo-plastic flow behavior at TS of 4.23-7.32%, and was well described by Power-law model. At TS of 4.23%, rheological properties were not obviously affected by particle size and temperature. However, when TS was increased to 7.32%, there was 10.37% shear stress reduction by size-reduction from 20 to 80-mesh, and 11.73% shear stress reduction by temperature-increase from 25 to 55 °C. PTS was advanced as variations of power consumption by TS-increase from 4.23% to 7.32%. There was 9.2% PTS-reduction by size-reduction from 20 to 80-mesh at 35 °C. Moreover, PTS-reduction of 10.3%/10 °C was achieved at 20-mesh compared with 9.0%/10 °C at 80-mesh.
研究了玉米秸秆基质的流变性，以探索不同总固体（TS）在厌氧消化中减少搅拌能量的潜力。研究了粒径和温度对流变性能及相应节能的影响。结果表明，玉米秸秆浆在 TS 为 4.23-7.32%时表现出假塑性流动行为，并用幂律模型很好地描述。在 TS 为 4.23%时，粒径和温度对流变性能没有明显影响。然而，当 TS 增加到 7.32%时，粒径从 20 目减小到 80 目可使剪切应力降低 10.37%，温度从 25°C 升高到 55°C 可使剪切应力降低 11.73%。PTS 是通过 TS 从 4.23%增加到 7.32%而增加的功率消耗的变化。在 35°C 时，粒径从 20 目减小到 80 目可使 PTS 减少 9.2%。此外，与 80 目时 9.0%/10°C 相比，在 20 目时 PTS 可减少 10.3%/10°C。
