Universidad Politécnica de Valencia, Valencia, Spain.
Environ Technol. 2011 Jul;32(9-10):921-32. doi: 10.1080/09593330.2011.565806.
A modelling study has been developed in which the energy requirements of aerobic and anaerobic membrane bioreactors (MBRs) are assessed in order to compare these two wastewater treatment technologies. The model took into consideration the aeration required for biological oxidation in aerobic MBRs (AeMBRs), the energy recovery from methane production in anaerobic MBRs (AnMBRs) and the energy demands of operating submerged and sidestream membrane configurations. Aeration and membrane energy demands were estimated based on previously developed modelling studies populated with operational data from the literature. Given the difference in sludge production between aerobic and anaerobic systems, the model was benchmarked by assuming high sludge retention times or complete retention of solids in both AeMBRs and AnMBRs. Analysis of biogas production in AnMBRs revealed that the heat required to achieve mesophilic temperatures (35 degrees C) in the reactor was only possible with influent wastewater strengths above 4-5 g COD L(-1). The general trend of the submerged configuration, which is less energy intensive than the sidestream configuration in aerobic systems, was not observed in AnMBRs, mainly due to the wide variation in gas demand utilized in anaerobic systems. Compared to AeMBRs, for which the energy requirements were estimated to approach 2 kWh m(-3) (influent up to 1 g COD L(-1)), the energy demands associated with fouling control in AnMBRs were lower (0.80 kWh m(-3) for influent of 1.14 g COD L(-1)), although due to the low fluxes reported in the literature capital costs associated with membrane material would be three times higher than this.
已经开发出一种模型研究，以评估好氧和厌氧膜生物反应器（MBR）的能源需求，以便比较这两种废水处理技术。该模型考虑了好氧 MBR（AeMBR）中生物氧化所需的曝气、厌氧 MBR（AnMBR）中甲烷生产的能量回收以及浸没式和侧流膜配置的运行能源需求。曝气和膜能源需求是根据先前开发的模型研究，并使用文献中的操作数据进行了估算。鉴于好氧和厌氧系统中污泥产量的差异，通过假设 AeMBR 和 AnMBR 中的高污泥停留时间或固体完全保留，对模型进行了基准测试。对 AnMBR 中沼气生产的分析表明，只有在进水 COD 浓度高于 4-5 g/L 时，才能利用热量达到反应器中中温（35°C）。在 AnMBR 中，没有观察到比好氧系统中浸没式构型能源效率更高的侧流构型的一般趋势，这主要是由于在厌氧系统中气体需求的广泛变化。与 AeMBR 相比，估计 AeMBR 的能源需求接近 2 kWh/m³（进水 COD 浓度高达 1 g/L），而 AnMBR 中与污垢控制相关的能源需求较低（进水 COD 浓度为 1.14 g/L 时为 0.80 kWh/m³），尽管由于文献中报道的通量较低，与膜材料相关的资本成本将是这一数字的三倍。
