Laboratory of Environment-Enhancing Energy (E2E), Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
Bioresour Technol. 2019 Feb;274:335-342. doi: 10.1016/j.biortech.2018.11.095. Epub 2018 Nov 27.
Developing efficient methods to recover energy from post-hydrothermal liquefaction wastewater (PHW) is critical for scaling up hydrothermal liquefaction (HTL) technology. Here we evaluated two-stage fermentation (TF) and catalytic hydrothermal gasification (CHG) for biohythane production using PHW. A hydrogen yield of 29 mL·g COD and methane yield of 254 mL·g COD were achieved via TF. In comparison, a higher hydrogen yield (116 mL·g COD) and lower methane yield (65 mL·g COD) were achieved during CHG. Further, a techno-economic and sensitivity analysis was conducted. The capital cost and operating cost for TF varied with the different reactor systems. TF with high-rate reactors suggested its promising commercialized application as it had a lower minimum selling price (-0.71 to 2.59 USD per gallon of gasoline equivalent) compared with conventional fossil fuels under both the best and reference market conditions. Compared with TF, CHG was only likely to be profitable under the best case conditions.
开发从水热液化后废水（PHW）中回收能量的有效方法对于扩大水热液化（HTL）技术至关重要。在这里，我们评估了两段式发酵（TF）和催化水热气化（CHG）用于 PHW 生产生物丁烷的工艺。TF 可实现 29 mL·g COD 的氢气产率和 254 mL·g COD 的甲烷产率。相比之下，CHG 期间可实现更高的氢气产率（116 mL·g COD）和更低的甲烷产率（65 mL·g COD）。此外，还进行了技术经济和敏感性分析。TF 的资本成本和运营成本随不同的反应器系统而变化。具有高速率反应器的 TF 表明其具有有前景的商业化应用，因为与传统化石燃料相比，在最佳和参考市场条件下，其最低销售价格（每加仑汽油当量-0.71 至 2.59 美元）更低。与 TF 相比，只有在最佳情况下，CHG 才可能盈利。
