García Rea Víctor S, Egerland Bueno Beatriz, Muñoz Sierra Julian D, Nair Athira, Lopez Prieto Israel J, Cerqueda-García Daniel, van Lier Jules B, Spanjers Henri
Sanitary Engineering Section, Department of Water Management, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, the Netherlands; Econvert Water & Energy, Venus 35, 8448 CE, Heerenveen, the Netherlands.
Sanitary Engineering Section, Department of Water Management, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, the Netherlands; Laboratory of Environmental Biotechnology, Department of Food Engineering, University of Sao Paulo, 225, Duque de Caxias Norte, Pirassununga, Sao Paulo, 13635-900, Brazil.
J Hazard Mater. 2023 Apr 5;447:130709. doi: 10.1016/j.jhazmat.2022.130709. Epub 2022 Dec 31.
Bitumen fume condensate (BFC) is a hazardous wastewater generated at asphalt reclamation and production sites. BFC contains a wide variety of potentially toxic organic pollutants that negatively affect anaerobic processes. In this study, we chemically characterized BFC produced at an industrial site and evaluated its degradation under anaerobic conditions. Analyses identified about 900 compounds including acetate, polycyclic aromatic hydrocarbons, phenolic compounds, and metal ions. We estimated the half maximal inhibitory concentrations (IC) of methanogenesis of 120, 224, and 990 mgCOD·L for three types of anaerobic biomass, which indicated the enrichment and adaptation potentials of methanogenic biomass to the wastewater constituents. We operated an AnMBR (7.0 L, 35 °C) for 188 days with a mixture of BFC, phenol, acetate, and nutrients. The reactor showed a maximum average COD removal efficiency of 87.7 ± 7.0 %, that corresponded to an organic conversion rate of 286 ± 71 mgCOD·Ld. The microbial characterization of the reactor's biomass showed the acetoclastic methanogen Methanosaeta as the most abundant microorganism (43 %), whereas the aromatic and phenol degrader Syntrophorhabdus was continuously present with abundances up to 11.5 %. The obtained results offer the possibility for the application of AnMBRs for the treatment of BFC or other petrochemical wastewater.
沥青烟冷凝物（BFC）是在沥青回收和生产场地产生的一种有害废水。BFC含有多种潜在有毒有机污染物，会对厌氧过程产生负面影响。在本研究中，我们对某工业场地产生的BFC进行了化学表征，并评估了其在厌氧条件下的降解情况。分析鉴定出约900种化合物，包括乙酸盐、多环芳烃、酚类化合物和金属离子。我们估计了三种类型厌氧生物质产甲烷作用的半数最大抑制浓度（IC）分别为120、224和990 mgCOD·L，这表明产甲烷生物质对废水成分的富集和适应潜力。我们使用BFC、苯酚、乙酸盐和营养物质的混合物在一个厌氧膜生物反应器（7.0 L，35°C）中运行了188天。该反应器的最大平均化学需氧量去除效率为87.7±7.0%，对应的有机转化率为286±71 mgCOD·Ld。对反应器生物质的微生物表征显示，乙酸裂解产甲烷菌甲烷鬃菌是最丰富的微生物（43%），而芳香和苯酚降解菌嗜互营杆菌持续存在，丰度高达11.5%。所得结果为应用厌氧膜生物反应器处理BFC或其他石化废水提供了可能性。
