Applicability of compartmentalized anaerobic reactor system followed by anaerobic filter on small swine wastewater treatment

ABSTRACT The aim of this work was to assess the performance of a system composed by a compartmentalized anaerobic reactor (CAR) followed by anaerobic filter (AF) in the treatment of the wastewater of as mall pigfarm.The following parameters were analyzed: pH, total volatilefatty acids (VFA), total demand of chemical oxygen (DCOt), dissolved chemical oxygen demand (CODdiss), chemical oxygen demand due to suspended solids (CODSS), total suspended solids (TSS), volatile suspended solids (VSS) and total kjeldhal nitrogen (TKN). The effluents and AF values for the CAR, the DCOt, TSS and TKN were 6,633 and 4,361mg.L-1, 2,418 and 595 mg.L-1, and 888 and 954 mg.L-1, respectively, for a volumetric organic load (VOL) of 7.01 kgDCO(m3.d)-1 in CAR and 28.3 kgDCO(m3.d)-1 in AF, and hydraulic detention time of 70.5 hand 17.8 hin CAR and AF, respectively. The CAR system followed by FA presented a mean removal efficiency of 88.8% for COD and 80.5% for TSS. It is concluded that the anaerobic treatment system consisting of CAR followed by AF was efficient in removing DCO and TSS, allowing with the imposed operating conditions to achieve average removal values above 80%, becoming a great alternative for wastewater treatment in small swinefarms.

摘要 本研究旨在评估由分隔式厌氧反应器（Compartmented Anaerobic Reactor, CAR）串联厌氧滤池（Anaerobic Filter, AF）组成的系统处理小型养猪场废水的性能。本次分析的参数包括：pH值、总挥发性脂肪酸（Total Volatile Fatty Acids, VFA）、总化学需氧量（Total Demand of Chemical Oxygen, DCOt）、溶解性化学需氧量（Dissolved Chemical Oxygen Demand, CODdiss）、悬浮态化学需氧量（Chemical Oxygen Demand due to Suspended Solids, CODSS）、总悬浮固体（Total Suspended Solids, TSS）、挥发性悬浮固体（Volatile Suspended Solids, VSS）以及凯氏总氮（Total Kjeldahl Nitrogen, TKN）。在容积有机负荷（Volumetric Organic Load, VOL）分别为CAR内7.01 kgDCO·(m³·d)⁻¹、AF内28.3 kgDCO·(m³·d)⁻¹，水力停留时间分别为CAR内70.5 h、AF内17.8 h的运行条件下，CAR单元出水及AF单元出水的DCOt、TSS与TKN浓度分别为6633 mg·L⁻¹与4361 mg·L⁻¹、2418 mg·L⁻¹与595 mg·L⁻¹，以及888 mg·L⁻¹与954 mg·L⁻¹。经CAR串联AF处理后的系统，其化学需氧量（COD）平均去除率达88.8%，总悬浮固体（TSS）平均去除率达80.5%。研究表明，由CAR串联AF组成的厌氧处理系统对DCO与TSS具有良好的去除效果，在给定的运行工况下可实现80%以上的平均去除率，是小型养猪场废水处理的优质备选方案。