Department of Sciences and Techniques of Water and Environment, University of Cantabria, Los Castros s/n, Santander, Spain.
Bioresour Technol. 2011 Feb;102(3):2143-50. doi: 10.1016/j.biortech.2010.10.068. Epub 2010 Oct 20.
An overall treatment process for the removal of nitrogen, methane production and obtention of valuable fertilizers from dairy manure has been investigated in laboratory scale. Solid and liquid fractions were separated by flocculation and screening. The solid fraction contained 81.6%, 84.4%, 58.6% and 85.2% of TS, VS, TKN-N and P(T) originally present in manure. Batch anaerobic digestion of this solid fraction at 50°C resulted in methane production of 29.0 L CH(4)/kg. The liquid fraction, free of suspended solids, was satisfactorily treated at 35°C in an upflow anaerobic sludge blanket reactor operating stably at an organic loading rate of 40.8 g COD/(L·d) reaching a methane production of 10.3 L CH(4)/(L·d). Accumulation of volatile fatty acids did not occur. Ammonia nitrogen concentration in the anaerobic effluent fluctuated between 850-1170 mg NH(4)(+)-N/L and was reduced to values less than 100mg NH(4)(+)-N/L by struvite precipitation.
已经在实验室规模上研究了从奶制品废水中去除氮、生产甲烷和获得有价值肥料的综合处理过程。通过絮凝和筛选将固液两部分分离。固体部分含有 81.6%、84.4%、58.6%和 85.2%的 TS、VS、TKN-N 和 P(T)，分别是粪便中原始存在的。将这种固体部分在 50°C 下进行分批厌氧消化，产生了 29.0 L CH(4)/kg 的甲烷。不含悬浮固体的液体部分在 35°C 下在上升流厌氧污泥床反应器中得到了满意的处理，该反应器在 40.8 g COD/(L·d)的有机负荷率下稳定运行，达到了 10.3 L CH(4)/(L·d)的甲烷产量。挥发性脂肪酸没有积累。厌氧出水的氨氮浓度在 850-1170 mg NH(4)(+)-N/L 之间波动，通过鸟粪石沉淀将其降低到小于 100mg NH(4)(+)-N/L 的浓度。
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