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Table 4 COD values and removal rates before and after membrane ultrafiltration with 100, 10, and 1 kDa

From: Methane potentials of wastewater generated from hydrothermal liquefaction of rice straw: focusing on the wastewater characteristics and microbial community compositions

Ultrafiltration 200 °C–0.5 h 320 °C–0.5 h
COD, g/L R R, % COD, g/L R R, %
Raw WW 27.58 ± 2.89 24.33 ± 1.19
100 kDa 26.81 ± 1.91 2.79 ± 0.20 24.03 ± 0.97 1.23 ± 0.05
10 kDa 25.79 ± 0.71 6.49 ± 0.18 23.17 ± 1.11 4.77 ± 0.23
1 kDa 18.25 ± 1.03 33.82 ± 1.91 19.34 ± 0.45 20.51 ± 0.48