The presence of synthetic azo dyes in water can affect human health and the environment. Conventional treatments are not suitable to remove these synthetic dyes, as most of them have complex structures. In this work, the removal of Basic Blue 9 (BB9) dye was evaluated by using four different wastewater treatments. Biological treatment consisted of a process with microorganisms immobilized in sodium alginate. Chemical treatment was evaluated using ozone. Electrochemical treatment was carried out by electro-Fenton (EF) process using a parallel plate reactor and a carbon cathode. A reactor packed with activated carbon was used as a physical treatment. For each process, BB9 concentration was adjusted based on the removal capacity of the wastewater treatment used. Efficiency was evaluated using absorbance. Immobilized microorganisms degraded 6.61 mg/L within 120 min with an efficiency of 99%. Ozone oxidation degraded a BB9 concentration of 914.7 mg/L with an efficiency of 99% in 100 min. In the electrochemical process, the electrolysis lasted 180 min, where 5.3 mM H₂O₂ was electrogenerated and a concentration of 29.26 mg/L was degraded in 40 min with a removal efficiency of 97.7%. The physical treatment (adsorption) removed 7.85 mg/L of BB9 with an efficiency of 83.26%. According to the results, all the treatments provided high removal of BB9. Considering that the selection of wastewater treatment is highly dependent on operating expenses, a cost analysis is also presented for the wastewater treatments used.

水中存在的合成偶氮染料会影响人体健康和环境。常规处理方法不适合去除这些合成染料，因为它们大多数具有复杂的结构。在这项工作中，通过使用四种不同的废水处理方法评估了碱性蓝9（BB9）染料的去除情况。生物处理包括将微生物固定在藻酸钠中的过程。使用臭氧评估化学处理。使用平行板反应器和碳阴极通过电芬顿（EF）工艺进行电化学处理。将装有活性炭的反应器用作物理处理。对于每个过程，都会根据所用废水处理的去除能力来调整BB9浓度。使用吸光度评估效率。固定化微生物降解6。120分钟内达到61 mg / L，效率为99％。臭氧氧化降解BB9的浓度为914.7 mg / L，在100分钟内的效率为99％。在电化学过程中，电解持续了180分钟，其中5.3 mM H_产生2 O ₂并在40分钟内降解29.26 mg / L的浓度，去除效率为97.7％。物理处理（吸附）去除了7.85 mg / L的BB9，效率为83.26％。根据结果​​，所有处理均提供了较高的BB9去除率。考虑到废水处理的选择高度依赖于运营费用，因此还对所使用的废水处理进行了成本分析。