State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Department Bioengineering, Leibniz Institute for Agricultural Engineering, Max-Eyth-Allee 100, 14469 Potsdam, Germany.
Department Bioengineering, Leibniz Institute for Agricultural Engineering, Max-Eyth-Allee 100, 14469 Potsdam, Germany.
J Environ Sci (China). 2016 Jul;45:200-6. doi: 10.1016/j.jes.2016.01.009. Epub 2016 Feb 16.
In order to investigate the oxygen tolerance capacity of upflow anaerobic solid-state (UASS) with anaerobic filter (AF) system, the effect of microaeration on thermophilic anaerobic digestion of maize straw was investigated under batch conditions and in the UASS with AF system. Aeration intensities of 0-431mL O2/gvs were conducted as pretreatment under batch conditions. Aeration pretreatment obviously enhanced anaerobic digestion and an aeration intensity of 431mL O2/gvs increased the methane yield by 82.2%. Aeration intensities of 0-355mL O2/gvs were conducted in the process liquor circulation of the UASS with AF system. Dissolved oxygen (DO) of UASS and AF reactors kept around 1.39±0.27 and 0.99±0.38mg/L, respectively. pH was relatively stable around 7.11±0.04. Volatile fatty acids and soluble chemical oxygen demand concentration in UASS reactor were higher than those in AF reactor. Methane yield of the whole system was almost stable at 85±7mL/gvs as aeration intensity increased step by step. The UASS with AF system showed good oxygen tolerance capacity.
为了研究上流式厌氧固体（UASS）与厌氧滤池（AF）系统的耐氧能力，在分批条件下和 UASS 与 AF 系统中研究了微曝气对高温厌氧消化玉米秸秆的影响。在分批条件下进行了 0-431mL O2/gvs 的曝气强度预处理。曝气预处理明显增强了厌氧消化，曝气强度为 431mL O2/gvs 时甲烷产率提高了 82.2%。在 UASS 与 AF 系统的过程液循环中进行了 0-355mL O2/gvs 的曝气强度。UASS 和 AF 反应器中的溶解氧（DO）分别保持在 1.39±0.27 和 0.99±0.38mg/L 左右。pH 值相对稳定在 7.11±0.04 左右。UASS 反应器中的挥发性脂肪酸和可溶解化学需氧量浓度高于 AF 反应器。随着曝气强度的逐步增加，整个系统的甲烷产率几乎稳定在 85±7mL/gvs。UASS 与 AF 系统具有良好的耐氧能力。
