State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
Bioresour Technol. 2013 Jul;139:43-9. doi: 10.1016/j.biortech.2013.04.006. Epub 2013 Apr 9.
The characteristics of the long term (90 d) anaerobic semi-continuous digestion of food wastes/animal slurry wastewater with different C/N ratio were investigated. The research demonstrates that, in the semi-continuous digestion process, different C/N ratios of substrate led to a significant effect to the characteristic of anaerobic digestion (AD). It is undoubtedly that the semi-continuous AD is efficient within a wide range of C/N ratios, and the lower C/N substrate promoted the activity of the methanogen in a long time, which maintained a stable high CH4 concentration and total organic carbon (TOC) utilization. During the whole AD process, an active buffer system was formed from NH4(+) and VFAs (by-products of TOC): this buffer system provided high concentrations of VFAs, thus increasing both the CH4 yield and TOC utilization; and also maintained a high tolerance to NH4(+) and VFAs in the system, which defusing the impact of NH4(+).
考察了不同 C/N 比的食物垃圾/动物粪便废水的长期（90 天）厌氧半连续消化特性。研究表明，在半连续消化过程中，底物的不同 C/N 比对厌氧消化（AD）的特性有显著影响。毫无疑问，半连续 AD 在很宽的 C/N 比范围内都是有效的，较低的 C/N 底物在长时间内促进了产甲烷菌的活性，从而保持了稳定的高 CH4 浓度和总有机碳（TOC）利用率。在整个 AD 过程中，NH4(+) 和 VFAs（TOC 的副产物）形成了一个活跃的缓冲系统：该缓冲系统提供了高浓度的 VFAs，从而提高了 CH4 产量和 TOC 的利用率；并且还保持了对系统中 NH4(+) 和 VFAs 的高耐受性，从而减轻了 NH4(+) 的影响。
