Effect of freeze–thaw process on physical properties, microbial activities and population structures of anaerobic sludge
| Autor: | Maneerat Khemkhao, Savitri Vatanyoopaisarn, Sasikarn Nuchdang, Verawat Champreda, Sithichoke Tangphatsornruang, Sarunyou Wongwilaiwalin, Wuttichai Mhuantong, Jiraprat Kitsuwan, Chantaraporn Phalakornkule |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Acidogenesis 030106 microbiology Population Porphyromonadaceae Bioengineering Applied Microbiology and Biotechnology Microbiology 03 medical and health sciences RNA Ribosomal 16S Freezing Proteobacteria Clostridiaceae Anaerobiosis Food science education Oxalobacteraceae Propionibacteriaceae education.field_of_study Microbial Viability Sewage biology Hydrogen-Ion Concentration biology.organism_classification 030104 developmental biology Acids Biotechnology Pseudomonadaceae |
| Zdroj: | Journal of Bioscience and Bioengineering. 123:474-481 |
| ISSN: | 1389-1723 |
| DOI: | 10.1016/j.jbiosc.2016.11.005 |
| Popis: | Effects of the freeze-thaw process on physical properties, cell viability, microbial activities and population structures of anaerobic sludge were investigated. It was found that the sludge volume index was greatly reduced from 16.4 mL/g in the original sludge to 4.0 mL/g in the solid fraction of the frozen-thawed sludge. Even though the freeze-thaw process decreased cell viability in the solid fraction of the frozen-thawed sludge, microbial activity tests showed that the freeze-thaw process enhanced acidogenic activity approximately 20%. The enhanced acidogenic activity of the solid fraction was in good agreement with the enrichment of Clostridiaceae, Porphyromonadaceae and Propionibacteriaceae found in the solid fraction. The relative abundances of Proteobacteria families Oxalobacteraceae, Moraxellaceae, and Pseudomonadaceae were found to be highest in the liquid fraction where they form a substantial proportion of the bacterial community (a total of 59%). |
| Databáze: | OpenAIRE |
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