The disposal of untreated or partially treated brewery wastewater can cause pollution problems to the receiving water bodies. The objective of this study was to evaluate the effectiveness of a two-stage horizontal subsurface flow constructed wetland (HSSFCW) system planted with Cyperus alternifolius and Typha latifolia in polishing an up-flow anaerobic sludge blanket (UASB) reactor treating brewery effluent in Kombolcha, Northern Ethiopia. The system was integrated with the UASB reactor, and its performance efficiency was monitored for a year using standard methods. The first-order kinetic model was used to correlate the influent and effluent pollutant concentrations and estimate the areal rate constant (k_A) by fitting the experimental data to the model. The HSSFCW's water quality index (WQI) and oxygen transfer rate (OTR) were also calculated. The findings showed that HSSFCW removed 89% total suspended solids (TSS), 92% chemical oxygen demand (COD), 83.6% total nitrogen (TN), 92.9% ammonium – nitrogen (NH₄⁺ − N), 74.4% total phosphorous (TP), and 79.5% orthophosphate (PO₄³⁻). Literature comparable OTR values were obtained for each HSSFCW stage with a total OTR value of 23.5 g⁻²d⁻¹. Effluent concentrations of COD, TN and NH₄⁺ − N were reasonably correlated (R² ≥ 0.85) to influent concentrations. The calculated k_A (md^-1) for TSS, COD, TN, NH₄⁺ − N, TP, and PO₄³⁻ were 0.26, 0.26, 0.11, 0.18, 0.08, and 0.08, respectively. Further polishing of the effluent with two-stage HSSFCW has shifted the WQI from a good to excellent water quality rating and thus, can be used as a sustainable polishing technique for agro-process wastewaters.

未经处理或部分处理的啤酒废水的处置会对接收水体造成污染问题。本研究的目的是评估种植互叶香附和香蒲的两级水平地下流人工湿地 (HSSFCW) 系统在处理 Kombolcha 啤酒厂废水的上流式厌氧污泥床 (UASB) 反应器中的有效性。埃塞俄比亚北部。该系统与 UASB 反应器集成在一起，并使用标准方法对其性能效率进行了一年的监测。一级动力学模型用于关联进水和出水污染物浓度并估计面积速率常数 (k _A) 通过将实验数据拟合到模型。还计算了 HSSFCW 的水质指数 (WQI) 和氧气转移率 (OTR)。结果表明，HSSFCW 去除了 89% 的总悬浮固体 (TSS)、92% 的化学需氧量 (COD)、83.6% 的总氮 (TN)、92.9% 的铵 - 氮 (NH ₄ ⁺  - N)、74.4% 的总磷 ( TP) 和 79.5% 的正磷酸盐 (PO ₄ ^3- )。对于每个HSSFCW阶段获得了文献可比较的OTR值，总OTR值为23.5 g ^-2 d ^-1。COD、TN 和NH ₄ ⁺  - N 的出水浓度与进水浓度合理相关（R ²  ≥ 0.85）。计算出的 k _A (md^-1)对于 TSS、COD、TN、NH ₄ ⁺  - N、TP 和 PO ₄ ^3-分别为 0.26、0.26、0.11、0.18、0.08 和 0.08。使用两级 HSSFCW 对流出物进行进一步精制已将 WQI 从良好水质等级转变为优秀水质等级，因此可用作农业加工废水的可持续精制技术。