Castro-Fernandez Ander, Taboada-Santos Anton, Balboa Sabela, Lema Juan M
CETAQUA, Water Technology Centre, A Vila da Auga, José Villar Granjel 33, E-15890, Santiago de Compostela, Spain; CRETUS Institute, Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Spain.
CETAQUA, Water Technology Centre, A Vila da Auga, José Villar Granjel 33, E-15890, Santiago de Compostela, Spain.
Bioresour Technol. 2023 May;376:128839. doi: 10.1016/j.biortech.2023.128839. Epub 2023 Mar 9.
The study compares the potential to produce volatile fatty acids (VFA) from sewage sludge, both raw and thermally pre-treated in two modes of operation. In batch mode, raw sludge at pH 8 obtained the highest maximum VFA yield (0.41 g COD-VFA/g CODfed) whereas pre-treated sludge achieved a lower value (0.27 g COD-VFA/g CODfed). The operation of 5-L continuous reactors showed that thermal hydrolysis pre-treatment (THP) did not have any significant influence on VFA yields, averaging 15.1 % g COD-VFA/g COD with raw sludge and 16.6 % g COD-VFA/g COD with pre-treated one. Microbial community analysis showed that phylum Firmicutes was predominant in both reactors and that the enzymatic profiles involved in VFA production were very similar regardless of the substrate fed.
该研究比较了生污泥和热预处理污泥在两种运行模式下产生挥发性脂肪酸（VFA）的潜力。在间歇模式下，pH值为8的生污泥获得了最高的最大VFA产量（0.41 g COD-VFA/g COD进料），而预处理污泥的产量较低（0.27 g COD-VFA/g COD进料）。5升连续反应器的运行表明，热水解预处理（THP）对VFA产量没有显著影响，生污泥的平均产量为15.1% g COD-VFA/g COD，预处理污泥的平均产量为16.6% g COD-VFA/g COD。微生物群落分析表明，两个反应器中厚壁菌门均占主导地位，并且无论进料底物如何，参与VFA产生的酶谱都非常相似。
