THE INFLUENCE OF SUBSTRATE TRANSPORT LIMITATION ON POROSITY AND METHANOGENIC ACTIVITY OF ANAEROBIC SLUDGE GRANULES
THE INFLUENCE OF SUBSTRATE TRANSPORT LIMITATION ON POROSITY AND METHANOGENIC ACTIVITY OF ANAEROBIC SLUDGE GRANULES
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DOI：
10.1007/bf00228619
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发表时间：
1993-05-01
影响因子：
5
通讯作者：
LETTINGA, G
中科院分区：
文献类型：
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作者：
ALPHENAAR, PA;PEREZ, MC;LETTINGA, G
研究了厌氧颗粒的孔隙率、直径和产甲烷活性之间的关系。对不同颗粒污泥的实验表明，基质运输限制随着颗粒直径的增加而增加。因此，颗粒的核心会发生自溶，产生空心颗粒。孔隙率测量表明，中空中心不可用于基板传输。可能由于细菌裂解的影响，颗粒更内层的孔隙率降低。这导致大颗粒内部不活跃，不参与处理过程；比产甲烷活性随着颗粒尺寸的增加而降低。不同尺寸的颗粒之间没有观察到底物亲和力的显着差异，这可能表明对于大颗粒，只有外部具有生物活性。
The relationship between porosity, diameter and methanogenic activity of anaerobic granules has been investigated. Experiments with different granular sludges revealed that substrate transport limitations increase with the diameter of the granules. As a consequence, autolysis can occur in the core of the granule, producing hollow granules. The porosity measurements revealed that the hollow centre is not available for substrate transport. Possibly as an effect of bacterial lysis, the porosity decreases in the more interior layers of the granules. This results in a inactive inner part of the large granules, which is not involved in the treatment process; the specific methanogenic activity decreases with granule size. No marked difference in substrate affinity is observed between granules of different sizes, which probably indicates that for large granules only the exterior is biological active.