The potential of a novel Fe/EDTA/carbonate-based scrubbing process for the simultaneous removal of H₂S and CO₂ from biogas was studied by evaluating the influence of Fe/EDTA molarity (M), carbonate concentration (IC), biogas (B), air (A) and liquid (L) flow rates on biogas upgrading performance using a Taguchi L₁₆(4⁵) experimental design. The ANOVA demonstrated that molarity of the Fe/EDTA solution was a significant factor influencing H₂S concentration (0.035 % at 0.00 M to 0.000 % at 0.05 M). IC impacted on the concentrations of CO₂ (13.1 and 4.5 % at 4000 and 10,000 mg L⁻¹, respectively), N₂ and CH₄ (85.9 and 94.5 % at 4000 and 10,000 mgIC L⁻¹, respectively). The biogas flow rate affected the concentrations of CO₂ (2.5 to 13.8% at 10 and 40 mL min⁻¹, respectively), O₂, N₂ and CH₄ (95.9 to 85.4% at 10 and 40 mL min⁻¹, respectively). Likewise, the recycling liquid flow rate affected CO₂ (8.3 and 5.9 % at 5 and 30 mL min⁻¹, respectively), O₂, N₂ and CH₄ (90.5 and 93.3 % at 5 and 40 mL min⁻¹, respectively) concentrations. Finally, the air flow rate impacted on CO₂ (10.8 and 6.7 % at 800 and 1000 mL min⁻¹, respectively), H₂S, N₂ and CH₄ (87.9 and 92.2 % at 800 and 1000 mL min⁻¹, respectively) concentrations. Process optimization provided the optimal conditions for each control factor. Continuous biogas upgrading operation at M₂-IC₁-B₂-A₄-L₄ (0.05 M, 10,000 mgIC L⁻¹, 10 mL min⁻¹, 1000 mL min⁻¹ and 30 mL min⁻¹, respectively) provided CH₄, CO₂, O₂, N₂ and H₂S concentration in the upgrading biogas of 97.4, 1.4, 0.29, 0.97 and 0%, respectively, which complied with biomethane regulations.

通过评估Fe / EDTA摩尔浓度（M），碳酸盐浓度（IC），沼气（Fe / EDTA /碳酸盐/碳酸盐基洗涤法）同时去除沼气中H ₂ S和CO ₂的潜力，研究了其潜在的同时去除沼气中H ₂ S和CO ₂的潜力。B），使用Taguchi L ₁₆（4 ⁵）实验设计的空气（A）和液体（L）流速对沼气提升性能的影响。方差分析表明，Fe / EDTA溶液的摩尔浓度是影响H ₂ S浓度的重要因素（0.00 M为0.035％，0.05 M为0.000％）。IC对CO ₂（4000和10,000 mg L ^-1分别为13.1和4.5％），N ₂和CH ₄的浓度产生影响（在4000和10,000 mgIC L ^-1时分别为85.9和94.5％）。沼气流速影响CO ₂（分别在10和40 mL min ^-1时为2.5至13.8％），O ₂，N ₂和CH ₄（在10和40 mL min ^-1时分别为95.9至85.4％）的浓度）。同样，循环液流速影响了CO ₂（分别在5和30 mL min ^-1时分别为8.3和5.9％），O ₂，N ₂和CH ₄（在5和40 mL min ^-1时分别为90.5和93.3％））浓度。最后，空气流速对CO ₂有影响（分别在800和1000 mL min ^-1时分别为10.8％和6.7％），H ₂ S，N ₂和CH ₄（在800和1000 mL min ^-1时分别为87.9和92.2％）浓度。工艺优化为每个控制因素提供了最佳条件。连续沼气在M个操作升级₂ -IC ₁ -B ₂ -A ₄ -L ₄（0.05M，万MGIC大号^-1，10毫升分钟^-1，1000毫升分钟^-1和30mL分钟^-1分别）设置CH ₄，CO ₂，O ₂，N ₂提质沼气中的H ₂ S和H ₂ S浓度分别为97.4％，1.4％，0.29％，0.97％和0％，符合生物甲烷法规。