Shumbe Teklu, Angassa Kenatu, Tessema Israel, Tibebu Solomon, Abewaa Mikiyas, Getu Tolesa
Department of Environmental Engineering, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia.
Sustainable Energy Center of Excellence, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia.
Heliyon. 2024 Nov 26;10(23):e40719. doi: 10.1016/j.heliyon.2024.e40719. eCollection 2024 Dec 15.
Untreated wastewater from the brewing industry poses significant environmental risks due to its high organic content. Therefore, this study evaluates the wastewater treatment system at Heineken Brewery in Addis Ababa, Ethiopia. Key parameters analyzed include COD, BOD₅, TSS, pH, ammonia (NH₃), total nitrogen (TN), total phosphorus (TP), electrical conductivity (EC), temperature, turbidity, and volatile fatty acids (VFA). These parameters were analyzed following the procedures of the American Public Health Association's standard. The treatment system demonstrated notable efficiency, with influent temperature decreasing from 29.37 °C to 25.35 °C, remaining well below the acceptable limit of 40 °C. The pH dropped from a mean of 9.3 to 7.5, aligning with the acceptable range of 6-9. COD and BOD₅ were significantly reduced by 97.2 %, achieving levels well below discharge limits of 250 mg/L and 60 mg/L, respectively. TSS levels decreased by 95.7 %, with a mean of 32.3 mg/L. However, TP and TN removal efficiencies were lower at 49.4 % and 57.6 %, respectively, with TP slightly exceeding the limit of 5 mg/L. The system effectively reduced VFA by 94.3 % and turbidity by 71.5 %. While parameters such as pH, temperature, TN, NH₄-N, and EC were within acceptable limits, the high nutrient concentrations in the final effluent indicate potential environmental contamination if discharged untreated. Overall, while the treatment plant shows commendable pollutant removal efficiency, further optimization is needed for improved nutrient management.
由于酿造行业未经处理的废水有机含量高，会带来重大环境风险。因此，本研究评估了埃塞俄比亚亚的斯亚贝巴喜力啤酒厂的废水处理系统。分析的关键参数包括化学需氧量（COD）、生化需氧量（BOD₅）、总悬浮物（TSS）、pH值、氨（NH₃）、总氮（TN）、总磷（TP）、电导率（EC）、温度、浊度和挥发性脂肪酸（VFA）。这些参数按照美国公共卫生协会标准的程序进行分析。该处理系统显示出显著的效率，进水温度从29.37℃降至25.35℃，仍远低于40℃的可接受限值。pH值从平均9.3降至7.5，符合6 - 9的可接受范围。COD和BOD₅分别显著降低了97.2%，达到远低于250mg/L和60mg/L排放限值的水平。TSS水平下降了95.7%，平均为32.3mg/L。然而，TP和TN的去除效率较低，分别为49.4%和57.6%，TP略超过5mg/L的限值。该系统有效降低了94.3%的VFA和71.5%的浊度。虽然pH值、温度、TN、NH₄ - N和EC等参数在可接受范围内，但最终出水的高营养物浓度表明如果未经处理排放，可能会造成环境污染。总体而言，虽然该处理厂显示出值得称赞的污染物去除效率，但仍需要进一步优化以改善营养物管理。
