Performance of a down‐flow fluidized bed reactor under sulfate reduction conditions using volatile fatty acids as electron donors
Performance of a down‐flow fluidized bed reactor under sulfate reduction conditions using volatile fatty acids as electron donors
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DOI：
10.1002/bit.21288
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发表时间：
2007-07
影响因子：
3.8
通讯作者：
Lourdes B. Celis-García;E. Razo-Flores;O. Monroy
中科院分区：
文献类型：
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作者：
Lourdes B. Celis-García;E. Razo-Flores;O. Monroy
研究了用于处理富含硫酸盐的合成废水的下流流化床（DFFB）反应器的使用，以深入了解在下流状态下附着于塑料支撑物的生物膜中硫酸盐还原的结果。细的低密度聚乙烯颗粒用作在反应器内形成生物膜的载体。该反应器处理乙酸盐或乳酸盐、丙酸盐和丁酸盐的挥发性脂肪酸混合物，在不同的化学需氧量（COD）与硫酸盐的比率范围为1.67至0.67（g/g）。有机负荷率从2.5 g COD/L ·d增加到5 g COD/L ·d，硫酸盐负荷率从1.5 g SO 42-/L ·d增加到7.3 g SO 42-/L ·d。在连续运行初期，产甲烷是主要的生物过程;然而，187天后，硫酸盐还原成为主要的生物过程。369天后，COD去除率达到93%，硫酸盐去除率达到75%。反应器中的总硫化物浓度范围从105（当反应器主要产甲烷时）到实验结束时的约1，215 mg/L。高硫化物浓度不影响反应器的性能。结果表明，DFFB反应器的结构适合于厌氧处理富硫酸盐废水。Biotechnol. Bioeng. 2007;97：771-779.© 2006 Wiley Periodicals，Inc.
The use of a down‐flow fluidized bed (DFFB) reactor for the treatment of a sulfate‐rich synthetic wastewater was investigated to obtain insight into the outcome of sulfate reduction in a biofilm attached to a plastic support under a down‐flow regime. Fine low‐density polyethylene particles were used as support for developing a biofilm within the reactor. The reactor treated a volatile fatty acids mixture of acetate or lactate, propionate, and butyrate at different chemical oxygen demand (COD) to sulfate ratios ranging from 1.67 to 0.67 (g/g). Organic loading rate changed from 2.5 to 5 g COD/L · day and sulfate loading rate increased from 1.5 to 7.3 g SO 42‐ /L · day. At the beginning of continuous operation, methanogenesis was the predominant process; however, after 187 days, sulfate reduction became the main ongoing biological process. After 369 days, a COD removal of 93% and a sulfate removal of 75% were reached. Total sulfide concentrations in the reactor ranged from 105, when the reactor was mainly methanogenic, to around 1,215 mg/L at the end of the experiment. The high sulfide concentrations did not affect the performance of the reactor. Results demonstrated that the configuration of the DFFB reactor was suitable for the anaerobic treatment of sulfate‐rich wastewater. Biotechnol. Bioeng. 2007;97: 771–779. © 2006 Wiley Periodicals, Inc.