A hypothesis on Microthrix parvicella proliferation in biological nutrient removal activated sludge systems with selector tanks
A hypothesis on Microthrix parvicella proliferation in biological nutrient removal activated sludge systems with selector tanks
复制标题
DOI：
10.1111/j.1574-6941.2012.01304.x
复制
发表时间：
2012-05-01
影响因子：
4.2
通讯作者：
Andreadakis, Andreas
中科院分区：
文献类型：
--
作者：
Noutsopoulos, Constantinos;Mamais, Daniel;Andreadakis, Andreas
本研究的目的是评价微小微藻在厌氧、缺氧和好氧条件下摄取长链脂肪酸的能力，以及在缺氧和好氧条件下利用挥发性脂肪酸和长链脂肪酸的能力。根据这一结果，提出了好氧、缺氧和厌氧条件下絮体形成微生物与类细小杆菌竞争摄取长链脂肪酸的假说。根据这一假设，即使在相对较高的絮凝剂负荷值下，类似于细小球藻的M.也表现出与絮体形成微生物相似的长链脂肪酸吸收能力，这通常是在选择器储罐中施加的。根据这一假设，有证据表明，选择罐不能提供类似于细小病原菌控制的有效M。根据实验结果，类似于细小杆菌的菌株即使在缺氧条件下也能以与絮凝体相当的速度利用长链脂肪酸，再加上其较低的醋酸盐利用率，这就很好地解释了它对缓慢生物降解的有机碳化合物的偏好。
The objective of this study was to evaluate the ability of Microthrix parvicella for long-chain fatty acids uptake under anaerobic, anoxic, and aerobic conditions as well as its ability to utilize volatile fatty acids and long-chain fatty acids under anoxic and aerobic conditions. According to the results, a hypothesis on the competition between floc-forming microorganisms and M.similar to parvicella for long-chain fatty acids uptake under aerobic, anoxic, and anaerobic conditions was formulated. According to this hypothesis, M.similar to parvicella exhibits similar long-chain fatty acids uptake capacity with floc-forming microorganisms even at relatively high floc loading values that are very often imposed at selector tanks. Following this hypothesis, the failure of selector tanks to provide for an effective M.similar to parvicella control is evidenced. Based on the experimental results, the ability of M.similar to parvicella to utilize long-chain fatty acids with rates comparable to those of floc formers, even in anoxic conditions, in conjunction with its lower acetate utilization rates, provides a good explanation regarding its preference to slowly biodegradable organic carbon compounds.