Catalan Institute for Water Research (ICRA), Scientific and Technological Park, University of Girona, Emili Grahit 101, 17003 Girona, Spain.
Catalan Institute for Water Research (ICRA), Scientific and Technological Park, University of Girona, Emili Grahit 101, 17003 Girona, Spain; LEQUiA, Laboratory of Chemical and Environmental Engineering, University of Girona, Campus Montilivi, 17071 Girona, Spain.
Sci Total Environ. 2019 Jun 20;670:993-1000. doi: 10.1016/j.scitotenv.2019.03.218. Epub 2019 Mar 16.
A laboratory scale anaerobic membrane bioreactor was operated for 11 months treating synthetic wastewater that mimicked the concentrate from a forward osmosis process treating municipal wastewater with 80% water recovery. The effect of temperature variation on reactor performance was assessed. The reactor operated during 4 months at 34 °C and then temperature was decreased to 23 °C, 17 °C and 15 °C mimicking the typical temperature seasonal variations of the sewage. Average COD removal efficiencies were 95, 87, 76 and 67% at 34, 23, 17 and 15 °C respectively, obtaining lower biogas production and lower COD removal at lower temperatures. Dissolved methane in the permeate averaged 8.2 mg CH/L and did not significantly change with temperature. After 2 months operating at 15 °C, temperature was progressively increased, resulting in an immediate increase of methane production and COD removal efficiencies. Microbial analysis showed important changes in the archaeal community when temperature was changed from 34 to 23 °C.
实验室规模的厌氧膜生物反应器运行了 11 个月，处理模拟来自正渗透工艺处理市政污水（水回收率为 80%）的浓缩液的合成废水。评估了温度变化对反应器性能的影响。该反应器在 34°C 下运行了 4 个月，然后温度分别降至 23°C、17°C 和 15°C，模拟污水的典型季节性温度变化。在 34、23、17 和 15°C 时，平均 COD 去除效率分别为 95%、87%、76%和 67%，在较低温度下获得较低的沼气产量和较低的 COD 去除率。透过液中的溶解甲烷平均为 8.2mgCH/L，且与温度无显著变化。在 15°C 下运行 2 个月后，温度逐渐升高，导致甲烷产量和 COD 去除效率立即增加。微生物分析表明，当温度从 34°C 变为 23°C 时，古菌群落发生了重要变化。
