Metal Stimulation and Municipal Digester Thermophilic/Mesophilic Activity
Metal Stimulation and Municipal Digester Thermophilic/Mesophilic Activity
复制标题
DOI：
10.1061/(asce)0733-9372(2008)134:1(42
复制
发表时间：
2008
影响因子：
2.2
通讯作者：
D. Zitomer;C. Johnson;R. Speece
中科院分区：
文献类型：
--
作者：
D. Zitomer;C. Johnson;R. Speece
对来自高温和中温消化器（四个温度阶段厌氧消化器和一个阶段高温消化器）的生物质进行了分析，以了解由于营养物（Ni、Co 和 Fe）添加而导致的潜在甲烷生产率增加。此外，还比较了消化器操作和生物质活动。大多数（77%）生物质样品受益于养分，添加养分后丙酸盐和乙酸盐的利用率分别增加了 50% 和 35%。丙酸利用率更频繁地受到营养物添加的刺激，表明营养物改良后甲烷生产率增加了 14% 至 50%。其他人观察到在市政高温消化池中很难达到低丙酸盐浓度，特别是在较短的保留时间下。微量营养素补充是提高一些市政高温和中温消化池中丙酸盐和乙酸盐利用率的一种方法。
Biomass from thermophilic and mesophilic digesters (four temperature-phased anaerobic digesters and one phased thermophilic digester) was assayed for potential methane production rate increases resulting from nutrient (Ni, Co, and Fe) addition. Furthermore, digester operations and biomass activities were compared. The majority (77%) of biomass samples benefited from nutrients, with propionate and acetate utilization rates increasing as much as 50 and 35%, respectively, after nutrient addition. Propionate utilization rates were more frequently stimulated by nutrient addition, demonstrating increased methane production rates of from 14 to 50% upon nutrient amendment. Others have observed difficulty achieving low propionate concentrations in municipal thermophilic digesters, especially at lower retention times. Trace nutrient supplementation is one method to increase propionate and acetate utilization in some municipal thermophilic as well as mesophilic digesters.