Cemagref, UR GERE, Rennes, France.
Bioresour Technol. 2011 Feb;102(3):2185-92. doi: 10.1016/j.biortech.2010.09.112. Epub 2010 Nov 2.
A process combining anaerobic digestion and anoxic/oxic treatment was developed to treat pig slurry in-order-to partially convert organic matter (OM) into a valuable energy and simultaneously to comply with the environmental constraints as regards to nitrogen removal. However, OM content of digested pig slurry is insufficient to allow a further complete denitrification of the mineral nitrogen content. Hence, four different configurations were designed and evaluated to manage the OM requirements and achieve denitrification. Partial nitrification (PN) of ammonium to nitrite was also applied by regulating oxygen inflow time. Thus, the combined process could remove 38-52% of CODt, 79-88% of CODs, 66-75% of TN and 98-99% of NH(4)(+)N concentrations depending on the slurry characteristics. Anaerobic digestion was able to produce 5.9 Nm(3) of CH(4)/m(slurry added)(3). PN allowed a reduction in the oxygen and OM requirements respectively for nitrification and denitrification. Thus, this process trims-down the energy costs at the farm scale.
开发了一种结合厌氧消化和缺氧/好氧处理的工艺来处理猪粪浆，目的是部分将有机物（OM）转化为有价值的能源，同时符合有关氮去除的环境限制。然而，消化猪粪浆中的 OM 含量不足以允许进一步完全反硝化矿质氮含量。因此，设计并评估了四种不同的配置来管理 OM 需求并实现反硝化。通过调节氧气流入时间，还实现了铵盐到亚硝酸盐的部分硝化（PN）。因此，该组合工艺可根据猪粪浆特性去除 38-52%的 CODt、79-88%的 COD、66-75%的 TN 和 98-99%的 NH(4)(+)N 浓度。厌氧消化能够生产 5.9 Nm(3)的 CH(4)/m(添加的粪浆)(3)。PN 分别减少了硝化和反硝化的氧气和 OM 需求。因此，该工艺降低了农场规模的能源成本。
