Chemical scrubbing and biofiltration are well-established technologies for treating contaminated pollutants generated at wastewater treatment plants (WWTPs). Nevertheless, the growing need to reduce the ecological footprint of abatement technologies without affecting process efficiency is prioritizing biological alternatives. This study deals with the challenge of designing a structure for converting a chemical scrubber currently operating at a WWTP with a capacity of 6,400 population equivalent (PE) into a modular bioreactor without any actual modification of the scrubber´s structure. The inside of the reactor was divided into three levels or platforms for holding the biomaterial, and the corresponding parts were manufactured in PVC, with the exceptions of the screws and cross bracing. The study of the parts’ stress and strain limits revealed that the slats and half-rings should be reinforced with ribs, and the optimal rib height was studied on a case-by-case basis. It was also concluded that the base legs could hold the weight of 80 cm height biomaterial bed onto each of the three platforms. Based on previous studies, the converted biofilter with an inlet flow rate of 1,150 m³/h could render simultaneous removal efficiencies greater than 90% for H₂S and NH₃. Regarding the viability study, the annual savings from the elimination of chemical consumption were around 9.7% of the total investment cost. One of the main strengths of replacing the scrubber with a biofilter was the improvement in sustainable performance and health and safety, reducing both risk and the budget for prevention.

化学洗涤和生物过滤是用于处理废水处理厂（WWTP）产生的污染污染物的成熟技术。然而，在不影响工艺效率的情况下，减少减排技术的生态足迹的日益增长的需求是优先考虑生物替代品。这项研究解决了设计结构的挑战，该结构可将目前在污水处理厂运行的具有6400人口当量（PE）的化学洗涤塔转化为模块化生物反应器，而无需对洗涤塔的结构进行任何实际修改。反应器内部分为三层或三层用于固定生物材料，平台的相应部分用PVC制造，螺丝和十字撑杆除外。对零件的应力和应变极限的研究表明，板条和半环应使用肋骨进行加固，并根据具体情况研究最佳肋骨高度。还得出结论，基腿可以将80厘米高的生物材料床的重量支撑在三个平台上。根据先前的研究，转换后的生物滤池的入口流量为1,150 m³ / h可使H ₂ S和NH _3的同时去除效率大于90％。关于可行性研究，消除化学品消耗后每年节省的费用约为总投资成本的9.7％。用生物滤池代替洗涤塔的主要优势之一是可持续性能和健康与安全的改善，同时降低了风险和预防预算。