Del Nery Valéria, Pozzi Eloisa, Damianovic Márcia H R Z, Domingues Mércia R, Zaiat Marcelo
Céu Azul Alimentos Ltda, Rua Laura Maiello Kook, 300, CEP 18052-580, Sorocaba, SP, Brazil.
Bioresour Technol. 2008 Apr;99(6):2018-24. doi: 10.1016/j.biortech.2007.03.019. Epub 2007 May 2.
The performance and the granules characteristics of a 450 m(3) -UASB reactor operating for 1228 days, treating poultry slaughterhouse wastewater with an average COD reduction of 85% was examined. Granules were sampled in three different positions along the vertical central line of the reactor, revealing variations in the concentration of volatile total solids. Although the reactor had been in operation for an extended period of time, granule sizes of 0.5-1.5 mm appeared to predominate. The hollow core was well defined for granules with sizes ranging from 2 to 3 mm in all the sampling ports. The granules exhibited no layered microbial distribution and were packed with different morphotype cells intertwined randomly throughout the cross-section. Methanogenic Archaea predominated in the granules taken from every sampling port along the reactor. The results indicated that the characterization of the granules is a useful tool for the adoption of operational strategies toward optimization of UASB reactors.
对一座运行1228天、容积为450立方米的上流式厌氧污泥床（UASB）反应器进行了研究，该反应器用于处理家禽屠宰场废水，平均化学需氧量（COD）去除率达85%。沿着反应器垂直中心线的三个不同位置采集了颗粒样本，结果显示挥发性总固体浓度存在差异。尽管该反应器已运行了较长时间，但0.5 - 1.5毫米的颗粒尺寸似乎占主导地位。在所有采样口，2至3毫米大小的颗粒都有清晰的中空核心。颗粒没有呈现分层的微生物分布，不同形态类型的细胞在整个横截面上随机交织堆积。在沿反应器每个采样口采集的颗粒中，产甲烷古菌占主导地位。结果表明，颗粒特性对于采用优化UASB反应器的运行策略是一个有用的工具。
