Xanthan gum (XAN) is a widely used polysaccharide in various industries. Because of its unique properties, in this study, an attempt was made to adopt the procedure of xanthan gum cross-linking for the entrapment of bacterial cells that are able to biodegrade naproxen. The developed procedure proved to be completely neutral for Bacillus thuringiensis B1(2015b) cells, which demonstrated a survival rate of 99%. A negative impact of entrapment was noted for strain Planococcus sp. S5, which showed a survival rate in the 93–51% range. To achieve good mechanical properties of the composites, they were additionally hardened using polydopamine (PDA). XAN/PDA composites revealed a high stability in a wide range of pH, and their sorption capacity included both cationic and anionic molecules. Analysis of the survival rate during storage at 4°C in 0.9% NaCl showed that, after 35 days, 98–99% of B1(2015b) and 47% of S5 cells entrapped in XAN/PDA remained alive. This study also presents the results of naproxen biodegradation conducted using XAN/PDA/B1(2015b) in a trickling filter with autochthonous microflora. Hence, owing to the significant acceleration of drug biodegradation (1 mg/L in 14 days) and the chemical oxygen demand removal, the entrapped B1(2015b) cells in XAN/PDA composites showed a promising potential in bioremediation studies and industrial applications.

黄原胶（XAN）是各种行业中广泛使用的多糖。由于其独特的性质，在这项研究中，尝试采用黄原胶交联的方法来包埋能够生物降解萘普生的细菌细胞。对于苏云金芽孢杆菌B1（2015b）细胞，开发的程序被证明是完全中性的，其存活率为99％。注意到包埋对平板球菌有不利影响sp。S5，存活率在93-51％之间。为了获得复合材料的良好机械性能，还使用聚多巴胺（PDA）对其进行了硬化。XAN / PDA复合材料在很宽的pH范围内都显示出高稳定性，其吸附能力包括阳离子和阴离子分子。在0.9％NaCl中于4°C储存期间的存活率分析表明，在35天后，XAN / PDA中捕获的B1（2015b）B1（2015b）和S5细胞中有98％至99％仍然存活。这项研究还介绍了使用XAN / PDA / B1（2015b）在带有自生菌群的滴滤池中进行萘普生生物降解的结果。因此，由于药物生物降解的显着加速（在14天中达到1 mg / L）和去除了化学需氧量，