Barcón Tamara, Hernández Jerónimo, Gómez-Cuervo Santiago, Garrido Juan M, Omil Francisco
a Department of Chemical Engineering, School of Engineering , University of Santiago de Compostela , Rua Lope Gomez de Marzoa s/n., Santiago de Compostela E-15782 , Spain.
Environ Technol. 2015 Jul-Aug;36(13-16):2105-14. doi: 10.1080/09593330.2015.1021859. Epub 2015 Mar 23.
An innovative and patented process for medium-high strength sewage which comprises an anaerobic step followed by a hybrid anoxic-aerobic chamber and a final ultrafiltration stage was characterized in terms of methane fugitive emissions as well as odours. The operation at ambient temperature implies higher methane content in the liquid anaerobic effluent, which finally causes concentrations around 0.01-2.4% in the off-gas released in the anoxic-aerobic chamber (1.25% average). Mass balances indicate that these emissions account for up to 30-35% of the total methane generated in the anaerobic reactor. A conventional biofilter (BF) operated at an empty bed residence time of 4 min was used to treat these emissions for 70 d. In spite of the fluctuations in the methane inlet concentrations derived from the operation of the wastewater treatment plant (WWTP), it was possible to operate at pseudo-steady-state conditions, achieving average removal efficiencies of 76.5% and maximum elimination capacities of 30.1 g m(-3) h(-1). Odour removal was quantified as 99.1%. Fluorescence in situ hybridization probes as well as metabolic activity assays demonstrated the suitability of the biomass developed in the WWTP as inoculum to start up the BF due to the presence of methanotrophic bacteria.
一种用于中高强度污水的创新型专利工艺，该工艺包括一个厌氧步骤，随后是一个缺氧-好氧混合室和一个最终的超滤阶段，对其甲烷逸散排放和气味进行了表征。在环境温度下运行意味着液体厌氧流出物中的甲烷含量更高，这最终导致缺氧-好氧室排放的废气中甲烷浓度在0.01%-2.4%左右（平均为1.25%）。质量平衡表明，这些排放占厌氧反应器中产生的总甲烷的30%-35%。使用一个空床停留时间为4分钟的传统生物滤池（BF）处理这些排放物，持续70天。尽管由于污水处理厂（WWTP）的运行导致甲烷进口浓度存在波动，但仍有可能在准稳态条件下运行，实现平均去除效率为76.5%，最大去除能力为30.1 g m(-3) h(-1)。气味去除率量化为99.1%。荧光原位杂交探针以及代谢活性分析表明，由于存在甲烷营养细菌，污水处理厂中形成的生物质适合作为接种物启动生物滤池。
