Abstract：
The treatment of slaughterhouse wastewater is a complex task demanding careful consideration due to its challenging nature. Therefore, exploring more sustainable treatment methods for this particular type of wastewater is of utmost significance. This research focused on the impact of electrode materials, specifically graphite and titanium, on the efficiency of microbial fuel cells (MFCs) and electro-Fenton systems in treating slaughterhouse wastewater. Both graphite and titanium electrodes displayed increasing current density trends, with titanium outperforming graphite. Titanium showed superior electron transfer and current generation (2.2 to 21.2 mA/m2 ), while graphite ranged from 2.4 to 18.9 mA/m2 . Titanium consistently exhibited higher power density, indicating better efficiency in converting current to power (0.059 to 22.68 mW/m2 ), compared to graphite (0.059 to 12.25 mW/m2 ) over the 48-h period. In removal efficiency within the MFC system alone, titanium exhibited superior performance over graphite in key parameters, including zinc (45.5% vs. 37.19%), total hardness (39.32% vs. 29.4%), and nitrates (66.87% vs. 55.8%). For the electro-Fenton system with a graphite electrode, the removal efficiency ranged from 34.1% to 87.5%, with an average efficiency of approximately 56.2%. This variability underscores fluctuations in the efficacy of the graphite electrode across diverse wastewater treatment scenarios. On the other hand, the electro-Fenton system employing a titanium electrode showed removal efficiency values ranging from 26.53% to 89.99%, with an average efficiency of about 68.4%. The titanium electrode exhibits both a comparatively higher and more consistent removal efficiency across the evaluated scenarios. On the other hand, the integrated system achieved more than 90% removal efficiency from most of the parameters. The study underscores the intricate nature of slaughterhouse wastewater treatment, emphasizing the need for sustainable approaches. PRACTITIONER POINTS: Microbial fuel cell (MFC) and electro-Fenton were investigated for slaughterhouse wastewater treatment. The MFC microbial activity started to decrease after 24 h. The integrated system achieved up to 99.8% removal efficiency (RE) for total coliform bacteria. Up to 99.4% of RE was also achieved for total suspended solids (TSS). The integrated system highly improved RE of the pollutants.
摘要：
屠宰场废水的处理是一项复杂的任务，由于其具有挑战性，需要仔细考虑。因此,探索更可持续的处理这种特殊类型的废水的方法是至关重要的。本研究集中在电极材料的影响，特别是石墨和钛，微生物燃料电池（MFC）和电Fenton系统处理屠宰场废水的效率。石墨和钛电极都显示出电流密度增加的趋势，钛优于石墨。钛表现出优异的电子转移和电流产生（2.2至21.2mA/m2），而石墨的范围为2.4至18.9mA/m2。钛始终表现出更高的功率密度，表明在将电流转换为功率时具有更好的效率（0.059至22.68mW/m2），与48小时内的石墨（0.059至12.25mW/m2）相比。仅在MFC系统内的去除效率中，钛在关键参数上表现出优于石墨的性能，包括锌（45.5%与37.19%），总硬度(39.32%vs.29.4%），和硝酸盐（66.87%vs.55.8%）。对于带有石墨电极的电子Fenton系统，去除率为34.1%~87.5%,平均效率约为56.2%。这种可变性强调了石墨电极在各种废水处理方案中的功效波动。另一方面,采用钛电极的电Fenton系统的去除效率值在26.53％至89.99％之间，平均效率约为68.4%。钛电极在评估的方案中表现出相对较高和更一致的去除效率。另一方面,集成系统从大多数参数中实现了90%以上的去除效率。这项研究强调了屠宰场废水处理的复杂性，强调需要可持续的方法。实践要点：研究了微生物燃料电池（MFC）和电-Fenton在屠宰场废水处理中的应用。MFC微生物活性在24小时后开始降低。集成系统对总大肠杆菌的去除效率（RE）高达99.8％。对于总悬浮固体(TSS)也实现了高达99.4%的RE。集成系统高度改善了污染物的RE。
