In this study, the effect of rhamnolipid and Mg (Ⅱ) on microbial growth and 1,3-dichlorobenzene removal was investigated in two identical lab-scale biotrickling filters (named BTF1 and BTF2). The contact angle and Henry’s constant were detected at various concentrations of rhamnolipid and the results indicated that rhamnolipid is able to effectively improve the solubility of 1,3-dichlorobenzene in medium. The results of the experiments in BTFs showed that the optimal concentrations of rhamnolipid and Mg (Ⅱ) were 170 mg/L and 2 mg/L, respectively. The removal efficiency (RE) of 1,3-dichlorobenzene decreased from 100% to 57.13% for BTF1 that was not fed with rhamnolipid and Mg (Ⅱ) and from 100% to 86.26% for BTF2 that was fed with rhamnolipid and Mg (Ⅱ) when the inlet loading rate increased from 2.87 to 83.83 g/(m³·h) at an empty bed residence time (EBRT) of 60 s. The dissolved oxygen (DO) was analyzed throughout the entire period and the results showed that the two additives can significantly promote oxygen transfer. In addition, the microbial adhesive strength and community were observed and compared to show the positive role of rhamnolipid and Mg (Ⅱ).

在这项研究中，鼠李糖脂和Mg（Ⅱ）对微生物生长和1,3-二氯苯去除的影响在两个相同的实验室规模的生物滴滤滤池（分别为BTF1和BTF2）中进行了研究。测定了鼠李糖脂在不同浓度下的接触角和亨利常数，结果表明鼠李糖脂能够有效提高1,3-二氯苯在培养基中的溶解度。BTFs的实验结果表明，鼠李糖脂和Mg（Ⅱ）的最佳浓度分别为170 mg / L和2 mg / L。不添加鼠李糖脂和镁（Ⅱ）的BTF1对1，3-二氯苯的去除效率（RE）从100％降低到57.13％，而对鼠李糖脂和镁（Ⅱ）对BTF2的去除效率从100％降至86.26％。 ）时入口负载率从2.87增加到83.83 g /（m ³·h）在60 s的空床停留时间（EBRT）下。在整个过程中对溶解氧（DO）进行了分析，结果表明这两种添加剂可以显着促进氧的转移。此外，观察并比较了微生物的黏附强度和群落，以显示鼠李糖脂和Mg（Ⅱ）具有积极的作用。