Membrane-filterable, physically pretreated biomass composition
A technology for pretreatment of biomass and biomass, which is applied in grain treatment, hydrocarbon oil treatment, sugar production, etc., and can solve problems such as increased operating costs, short membrane replacement cycles, and increased investment costs.
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Embodiment 1
[0055] Example 1: Preparation of Compositions for Physical Pretreatment of Herbaceous Biomass
[0056] To prepare physically pretreated herbal biomass compositions, the following experiments were performed.
[0057] Specifically, herbaceous biomass of corn stover, wheat straw, grass grass, and rice straw was physically pretreated by double disc milling, grinder milling, hammer milling, or cutter milling. Double-disk grinding was performed at 300 rpm for 10 minutes using a double-disc grinder (KHAM-30S, Hankook Mineral Powder, Co., Ltd.). In addition, grinder milling, hammer milling, and cutter milling were performed using a multipurpose grinder (Multi Mill, RD1-15, グローENGINEERING). Cutter milling and hammer milling used 2 mm sieves, and grinder milling was processed by adjusting the gap to 50 μm.
Embodiment 2
[0058] Example 2: Particle Size Distribution and Density Measurements and Compositional Analysis of Comminuted Biomass Compositions
[0059] The following experiments were performed to determine the particle size, density and composition of physically pretreated herbal biomass compositions.
[0060] Specifically, after tapping for 1 minute using 10 g of the physically pretreated composition prepared in Example 1 above, the density was measured by determining its volume (Table 1), and by using a particle size analyzer (Particle sizeAnalysis , LS I3 220, BECKMAN COULTER TM ) dry analysis measured the average particle size of the physical pretreatment composition (Table 2, and Figures 1 to 4). In addition, the components of biomass processed by double disc milling were analyzed by the method of NREL Procedures LAP-002 (Table 3).
[0061] As a result, the density during the twin disc milling process was 0.5 g / mL or higher, and the density during grinder milling, hammer milling...
Embodiment 3
[0073] Example 3: Observation of Particle Shape of Physically Pretreated Biomass Compositions
[0074] The particle shape of the physically pretreated biomass composition was observed using a microscope (Dino-Lite, AM3113, Taiwan, China) ( FIGS. 5 to 8 ). As a result, the natural fibrils inherent in herbaceous biomass disappeared and the particle shape became uniform after all four types of biomass (corn stalk, wheat straw, grass grass, and rice straw) were treated by double disc milling. However, during grinder milling, hammer milling, and cutter milling processes, coarse fibrils characteristic of biomass remain, resulting in needle-like particles that are generally uneven in particle size and shape. These needle-like particles, fibrils, etc. block the membrane pores during MF passing through, leading to clogging phenomenon, process failure, and degraded separation performance. In addition, biomass solids form a filter cake which makes filtration difficult, and it is specu...
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