Characterized by the high concentration suspended solids (SS), chemical oxygen demand (COD), biological oxygen demand (BOD), ammonium nitrogen and total phosphorus (TP), a solid–liquid separation as a pretreatment is mandatory for swine wastewater before biological treatment. In this study, batch tests of electrocoagulation were investigated under different structural parameters (anode material, inter-electrode distance) and operational parameters (current density, stirring speed, initial pH and reaction time). The results showed that the optimal conditions were the Fe anode, inter-electrode distance of 2.0 cm, current density of 30 mA/cm², no stirring, initial pH of 6.3 without control and reaction time of 35 min in this study. By comparing with chemical coagulation, satisfactory performance was achieved under optimal electrocoagulation: supernatant recovery of 60%, SS, TP, COD and BOD removal efficiencies of 98.5%, 99.5%, 50.6% and 10%. In addition, fluorescent substances formation was observed under electrocoagulation and thus increased the BOD/COD ratio from 0.36 to 0.66. The enhanced biodegradability would facilitate the subsequent biological removal and the overall swine wastewater treatment. Conclusively, the iron electrocoagulation technology is a promising process for high-strength swine wastewater pretreatment.

具有高浓度的悬浮固体（SS），化学需氧量（COD），生物需氧量（BOD），铵态氮和总磷（TP）的特点，在进行生物处理之前，固液分离作为猪废水的预处理是强制性的。在这项研究中，在不同的结构参数（阳极材料，电极间距离）和操作参数（电流密度，搅拌速度，初始pH值和反应时间）下研究了电凝的批量测试。结果表明，最佳条件为Fe阳极，电极间距离为2.0 cm，电流密度为30 mA / cm ^2。，无搅拌，本研究中初始pH值为6.3，无控制，反应时间为35分钟。通过与化学混凝相比较，在最佳电凝条件下获得了令人满意的性能：上清液的回收率为60％，SS，TP，COD和BOD的去除效率为98.5％，99.5％，50.6％和10％。另外，在电凝作用下观察到荧光物质的形成，因此将BOD / COD比从0.36增加到0.66。增强的生物降解性将有助于后续的生物去除和整个猪废水的处理。总之，铁电凝技术是高强度猪废水预处理的有前途的工艺。