Performance of a novel multiple draft tubes airlift loop membrane bioreactor to treat ampicillin pharmaceutical wastewater under different temperatures
Performance of a novel multiple draft tubes airlift loop membrane bioreactor to treat ampicillin pharmaceutical wastewater under different temperatures
复制标题
新型多导流管气升式环路膜生物反应器在不同温度下处理氨苄青霉素制药废水的性能
DOI：
10.1016/j.cej.2019.122521
复制
发表时间：
2020-01-15
影响因子：
15.1
通讯作者：
Liu, Wenyu
中科院分区：
文献类型：
--
作者：
Chen, Zhaobo;Min, Hongchao;Liu, Wenyu
研究了不同温度（7 ℃、16 ℃、24 ℃、36 ℃、48 ℃）下新型多导流管气升式环流膜生物反应器（Mt-ALMBR）处理高浓度氨苄青霉素制药废水的性能和去除机理。在150天的运行过程中，最佳平均化学需氧量（COD）和氨苄青霉素去除率分别为98.2 +/- 0.2%（36 ℃）和63.2 +/- 5.6%（7 ℃）。污染物去除的主要机制是膜去除（7类似于16 ℃）和生物反应器去除（16 - 48 ℃）。低温下以吸附和膜截留为主，随着温度的升高，水解和生物降解逐渐占据主导地位。同时，活性污泥微生物的最适温度范围为16 ℃和36 ℃相近，在所有设定温度值中，36 ℃时对应的β-内酰胺酶活性最高。实验结果表明，温度对去除率有显著影响，最佳温度范围为24 ~ 36 ℃。当温度从7 ℃升高到48 ℃时，氨苄青霉素的半衰期（t（1/2））从330.0 d急剧下降到2.1 d。吸附温度为7、16、24、36和48 ℃时的最大吸附容量K-f分别为0.1284、0.2169、0.0645、0.1502和0.1524 mg/g。Δ G值均为负值，说明吸附过程属于自发物理吸附。此外，建立了自回归积分滑动平均（ARIMA）模型和数学拟合模型，并很好地模拟了Mt-ALMBR处理氨苄青霉素废水的性能。这些结果表明，Mt-ALMBR具有很大的应用潜力，氨苄青霉素制药废水处理。
In this study, the performance and removal mechanisms of a novel lab-scale multiple draft tubes airlift loop membrane bioreactor (Mt-ALMBR) for treating high-strength ampicillin pharmaceutical wastewater under different temperatures (7 degrees C, 16 degrees C, 24 degrees C, 36 degrees C, 48 degrees C) were investigated. During 150 days operation, the optimal average chemical oxygen demand (COD) and ampicillin removal rates were 98.2 +/- 0.2% (36 degrees C) and 63.2 +/- 5.6% (7 degrees C), respectively. The main mechanisms of pollutants removal were membrane removal (7 similar to 16 degrees C) and bioreactor removal (16 - 48 degrees C). Adsorption and membrane rejection were main pathways at low temperature, as temperature increased, hydrolysis and biodegradation gradually occupied a dominant position. Meanwhile, the optimum temperature ranges for activated sludge microorganisms were 16 degrees C similar to 36 degrees C, the corresponding beta-lactamase at 36 degrees C was the highest activity value among all the set temperature values. Experimental results showed that temperature had a significant impact on the removal rate, the optimum temperature range was proposed to be at 24 similar to 36 degrees C. The half-life (t(1/2)) of ampicillin drastically decreased from 330.0 d to 2.1 d when the temperature was increased from 7 degrees C to 48 degrees C. And the maximum adsorption capacity K-f at the adsorption temperatures of 7, 16, 24, 36 and 48 degrees C was 0.1284, 0.2169, 0.0645, 0.1502 and 0.1524 mg/g, respectively. The values of Delta G degrees were all negative, proving that the adsorption process of the ampicillin belonged to a spontaneous physical adsorption. In addition, autoregressive integrated moving average (ARIMA) and mathematical fitting models were developed and well simulated the performance of Mt-ALMBR to treat the ampicillin wastewater. These results suggest that Mt-ALMBR holds great potential for application in ampicillin pharmaceutical wastewater treatment.