Volatile fatty acids platform from thermally hydrolysed secondary sewage sludge enhanced through recovered micronutrients from digested sludge
| Autor: | Victoria Wilson, Achame Shana, Adam Henley, Philemon J. Kumi, Sandra Esteves |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Acidogenesis Environmental Engineering 010501 environmental sciences Inorganic ions 01 natural sciences Bioreactors Nutrient Extracellular polymeric substance 010608 biotechnology Micronutrients Food science Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering Sewage Chemistry Hydrolysis Ecological Modeling Fatty Acids Volatile Pollution Activated sludge Biochemistry Fermentation Digestate Sludge |
| Zdroj: | Water Research. 100:267-276 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/j.watres.2016.05.030 |
| Popis: | The extracellular polymeric substances and microbial cytoplasmic contents seem to hold inorganic ions and organic products, such as proteins and carbohydrates that are of critical importance for the metabolism of hydrolytic and acidogenic anaerobic microorganisms. The addition of soluble microbially recovered nutrients from thermally treated digestate sludge, for the fermentation of thermally hydrolysed waste activated sludge, resulted in higher volatile fatty acids yields (VFAs). The yield of VFAs obtained from the recovered microbial nutrients was 27% higher than the no micronutrients control, and comparable to the yield obtained using a micronutrients commercial recipe. In addition, the use of a low pH resulting from a high sucrose dose to select spore forming acidogenic bacteria was effective for VFA production, and yielded 20% higher VFAs than without the pH shock and this associated with the addition of recovered microbial nutrients would overcome the need to thermally pre-treat the inoculum. |
| Databáze: | OpenAIRE |
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