Modified steel slag for effect prolongation of calcium peroxide: A novel approach to enhancing SCFAs production from sludge anaerobic fermentation
| Autor: | Yifan Jin, Panyue Zhang, Ling Zhao, Qianqian Zhang, Hongtao Zhu, Xiaole Gao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Environmental Engineering Radical Alkalinity Bioengineering 010501 environmental sciences Raw material 01 natural sciences Hydrolysis chemistry.chemical_compound 010608 biotechnology Calcium peroxide Food science Anaerobiosis Waste Management and Disposal 0105 earth and related environmental sciences Sewage Renewable Energy Sustainability and the Environment General Medicine Hydrogen-Ion Concentration Fatty Acids Volatile Peroxides chemistry Steel Fermentation |
| Zdroj: | Bioresource technology. 309 |
| ISSN: | 1873-2976 |
| Popis: | In order to prolong the effect of CaO2 on improvement of short-chain fatty acids (SCFAs) production in sludge anaerobic fermentation, CaO2 particles were successfully loaded onto the porous surface of steel slag pre-modified with salicylic acid-methanol (SAM-SS). The prepared CaO2/SAM-SS was then characterized and investigated for its effects on anaerobic fermentation. Experimental results revealed that, due to the slow release and reaction of CaO2/SAM-SS, SCFAs concentrations in CaO2/SAM-SS tests were significantly higher than in the control and SAM-SS tests, and high SCFAs concentration was sustained for a longer period than in the CaO2 tests. Since most bacterial indexes were reduced by CaO2/SAM-SS, more supply of "raw materials" from a better disintegration and hydrolysis, which was associated with the alkalinity and •OH radicals released from the reaction of CaO2 with H2O, contribute to the higher SCFAs yields. This study provides a new approach towards a higher and longer SCFAs harvesting. |
| Databáze: | OpenAIRE |
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