Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
Bioresour Technol. 2022 Feb;346:126360. doi: 10.1016/j.biortech.2021.126360. Epub 2021 Nov 18.
Air-nanobubble water (NBW) was applied to pre-acclimate anaerobically digested sludge that was then used as the inoculum in the two-stage anaerobic digestion (AD) of high saline (20 g NaCl/L) food waste (FW) to optimize NBW application in the AD of high saline FW. K was simultaneously supplemented during the methanogenic stage to resist the inhibition of salt on methanogens. Results showed that after the second pre-acclimation cycle, the inoculum activity was increased 27% in the Air-NBW supplemented reactor in comparison to the deionized water (DW) supplemented one. In the first-stage AD, H yield was enhanced by 46% in the Air-NBW pre-acclimated sludge reactor compared with the DW pre-acclimated sludge reactor. Besides, supplementation of KOH in the methanogenic stage could enhance methane production by 17-25% in the DW reactors at initial pH 7.5, 8.0, and 9.0 when compared to the control reactor (using NaOH adjusted initial pH to 7.5), respectively.
气-纳米气泡水（NBW）被用于预驯化厌氧消化污泥，然后将其用作高盐（20 g NaCl/L）食物废物（FW）两段式厌氧消化（AD）的接种物，以优化 NBW 在高盐 FW 的 AD 中的应用。在产甲烷阶段同时补充 K，以抵抗盐对产甲烷菌的抑制。结果表明，在第二次预驯化循环后，与去离子水（DW）补充的反应器相比，补充 NBW 的反应器中的接种物活性提高了 27%。在第一阶段 AD 中，与 DW 预驯化污泥反应器相比，在 NBW 预驯化污泥反应器中，H 的产量提高了 46%。此外，在初始 pH 值为 7.5、8.0 和 9.0 时，在 DW 反应器中补充 KOH 可以分别比对照反应器（使用 NaOH 调节初始 pH 值至 7.5）提高甲烷产量 17-25%。
