...和pH值通常被用于诊断沼气发酵过程的稳定性。但是，近年的大量研究表明，pH值和产气量仅仅是发酵过程整个复杂体系经过一段时期变化后的最终体现，它们的变化不能真实和及时地反映发酵体系内微生物群落代谢、生物化学和物理化学过程的变化。对于缓冲能力较弱的沼气发酵系统，挥发性脂肪酸（VFA）的积累会迅速降低pH值，此时，pH值可作为有效的稳定性评判指标。
基于1522个网页-相关网页
Audio Amplifier VFA 音频放大器 ; 音频放年夜器
VFA-AD 处有切割点
Audio Frequency Amplifier VFA 音频放大器 ; 音频放年夜器
VFA-K 职业
Vfa Estimate 挥发性脂肪酸估计
VFA Voice Frequency Amplifier 音频放大器
VFA-Azubine 职业
VFA alkalinity VFA碱度
The key of the research is to study the relationship of gas production with pH and VFA,and to determine the optimal fermentation temperature and material ratio.
为探索发酵原料产气量与pH值、挥发性脂肪酸之间的关系,确定最佳原料配比以及发酵温度是关键。
参考来源 - 粪秆结构配比厌氧发酵中pH、VFA与产气效果的关系It was found that a mixedvolatile fatty acid (VFA) C-source resulted in ahigher rate of denitrifiCation than any of theindividual VFA C-sources which formed the mixedone.
混合挥发性脂肪酸碳源的反硝化速率比组成它的单一脂肪酸的反硝化速率高。
参考来源 - 期刊学术社区·2,447,543篇论文数据，部分数据来源于NoteExpress
The change of concentration of VFA of each group was similar, it rised first then fell after feeding.
各处理组的瘤胃液vfa浓度变化基本一致，均在采食后先升高又下降。
The kinetic constants and VFA accumulation in reactors showed that substrate degradation could be inhibited by increased dye concentrations.
从动力学常数以及挥发性脂肪酸（VFA）的积累情况来看，随着染料浓度的增加，外加基质的降解会受到抑制。
Potassium and magnesium increased, sodium and chlorine decreased in abomasal fluid, acetic, propionic, butyric and VFA increased in abomasal fluid.
真胃液中钾与镁升高，钠与氯下降，乙酸减少，丙酸、丁酸及VFA总量升高。
"Let me say that under the VFA, the United States forces are here to assist,advise and train,".
VOA: standard.2009.11.12
Several hundred U.S.military personnel are in the Philippines advising the country's forces on counter-insurgency tactics under the bilateral Visiting Forces Agreement or VFA.
VOA: standard.2009.11.12
The U.S.support is credited with helping the Philippine government capture or kill key leaders of two Islamic insurgent groups in the country's southern islands, but the VFA has become a target for Filipino leftist and nationalist factions who want it scrapped.
VOA: standard.2009.11.12
应用推荐