Departamento de Engenharia Química e de Alimentos, Escola de Engenharia Mauá, Instituto Mauá de Tecnologia (IMT), São Caetano do Sul, SP, Brazil.
Appl Biochem Biotechnol. 2012 Apr;166(8):2007-29. doi: 10.1007/s12010-012-9627-6. Epub 2012 Feb 29.
The aim of this work was to investigate the effect of different feeding times (2, 4 and 6 h) and applied volumetric organic loads (4.5, 6.0 and 7.5 gCOD L(-1) day(-1)) on the performance of an anaerobic sequencing batch biofilm reactor (AnSBBR) treating effluent from biodiesel production. Polyurethane foam cubes were used as inert support in the reactor, and mixing was accomplished by recirculating the liquid phase. The effect of feeding time on reactor performance showed to be more pronounced at higher values of applied volumetric organic loads (AVOLs). Highest organic material removal efficiencies achieved at AVOL of 4.5 gCOD L(-1) day(-1) were 87 % at 4-h feeding against 84 % at 2-h and 6-h feeding. At AVOL of 6.0 gCOD L(-1) day(-1), highest organic material removal efficiencies achieved with 4-h and 6-h feeding were 84 %, against 71 % at 2-h feeding. At AVOL of 7.5 gCOD L(-1) day(-1), organic material removal efficiency achieved with 4-h feeding was 77 %. Hence, longer feeding times favored minimization of total volatile acids concentration during the cycle as well as in the effluent, guaranteeing process stability and safety.
本研究旨在考察不同进料时间（2、4 和 6 h）和体积有机负荷（4.5、6.0 和 7.5 gCOD L(-1) day(-1))对处理生物柴油生产废水的厌氧序批式生物膜反应器（AnSBBR）性能的影响。在反应器中，使用聚氨酯泡沫块作为惰性载体，通过循环液相来实现混合。进料时间对反应器性能的影响在较高的体积有机负荷（AVOL）下更为明显。在 AVOL 为 4.5 gCOD L(-1) day(-1)时，4 h 进料的最高有机去除效率为 87%，而 2 h 和 6 h 进料的最高有机去除效率分别为 84%。在 AVOL 为 6.0 gCOD L(-1) day(-1)时，4 h 和 6 h 进料的最高有机去除效率均为 84%，而 2 h 进料的最高有机去除效率为 71%。在 AVOL 为 7.5 gCOD L(-1) day(-1)时，4 h 进料的有机去除效率为 77%。因此，较长的进料时间有利于在循环过程中和出水中最小化总挥发性酸浓度，从而保证工艺的稳定性和安全性。
