LEQUIA, Institute of the Environment, University of Girona, Girona, Spain.
LEQUIA, Institute of the Environment, University of Girona, Girona, Spain.
J Hazard Mater. 2015 May 15;288:60-8. doi: 10.1016/j.jhazmat.2015.02.014. Epub 2015 Feb 7.
Conventional swine manure treatment is performed by anaerobic digestion, but nitrogen is not treated. Microbial Fuel Cells (MFCs) allow organic matter and nitrogen removal with concomitant electricity production. MFC microbiomes treating industrial wastewaters as swine manure have not been characterized. In this study, a multidisciplinary approach allowed microbiome relation with nutrient removal capacity and electricity production. Two different MFC configurations (C-1 and C-2) were used to treat swine manure. In C-1, the nitrification and denitrification processes took place in different compartments, while in C-2, simultaneous nitrification-denitrification occurred in the cathode. Clostridium disporicum and Geobacter sulfurreducens were identified in the anode compartments of both systems. C. disporicum was related to the degradation of complex organic matter compounds and G. sulfurreducens to electricity production. Different nitrifying bacteria populations were identified in both systems because of the different operational conditions. The highest microbial diversity was detected in cathode compartments of both configurations, including members of Bacteroidetes, Chloroflexiaceae and Proteobacteria. These communities allowed similar removal rates of organic matter (2.02-2.09 kg COD m(-3)d(-1)) and nitrogen (0.11-0.16 kg Nm(-3)d(-1)) in both systems. However, they differed in the generation of electric energy (20 and 2 mW m(-3) in C-1 and C-2, respectively).
传统的猪粪处理是通过厌氧消化进行的，但氮没有得到处理。微生物燃料电池（MFC）允许通过同时产生电能来去除有机物和氮。处理工业废水（如猪粪）的 MFC 微生物组尚未得到描述。在这项研究中，采用多学科方法来研究微生物组与养分去除能力和电能生产的关系。使用两种不同的 MFC 配置（C-1 和 C-2）来处理猪粪。在 C-1 中，硝化和反硝化过程发生在不同的隔室中，而在 C-2 中，同时硝化-反硝化发生在阴极。在两个系统的阳极隔室中都鉴定出了 Clostridium disporicum 和 Geobacter sulfurreducens。C. disporicum 与复杂有机物化合物的降解有关，而 G. sulfurreducens 与电能生产有关。由于操作条件不同，在两个系统中都鉴定出了不同的硝化细菌种群。在两个配置的阴极隔室中检测到最高的微生物多样性，包括拟杆菌门、绿弯菌科和变形菌门的成员。这些群落允许在两个系统中以相似的速率去除有机物（2.02-2.09 kg COD m(-3)d(-1)）和氮（0.11-0.16 kg N m(-3)d(-1)）。然而，它们在产生电能方面有所不同（C-1 和 C-2 中的分别为 20 和 2 mW m(-3)）。
