About this Engineering article
Insights Into Microbial Interaction Profiles Contributing to Volatile Fatty Acids Production via Acidogenic Fermentation of Waste Activated Sludge Assisted by Calcium Oxide Pretreatment by Xin, Xiaodong; She, Yuecheng; Hong, Junming is a Engineering article available to read on EtoBox.
This first-attempted study illustrated the calcium oxide (CaO) agentia-pretreatment for prompting waste activated sludge (WAS) solubilization and enhancing volatile fatty acids (VFAs) bio-production through acidogenic fermentation. The 15-h CaO pretreatment was capable to produce a soluble chemical oxygen demand (SCOD) yield of ca. 153.17 mg COD/g VS and VFAs generation efficiency of 327.8 mg COD/g VS with adding dosage of 0.07 g/g TS. The relative frequencies corresponded to metabolic functions profiling were promoted obviously by CaO pretreatment and contributed to biosolid decomposition/VFAs production in sludge fermentation. Main genera of Azonexus, Arcobacter, Acinetobacter, Thauera, Petrimonas, Clostrium and Macellibacteroides cooperated synergically toward triggering concurrent VFAs generation/biosolid biodegradation. Finally, the CaO-pretreatment displayed positive merits in terms of sludge biosolid decomposition/recoverable resource harvest as compared with other alkali pretreatments. This study might shed lights on enriching intensification strategy for WAS management toward high-efficiency of recoverable resource harvest with lower cost.
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- Author
- Xin, Xiaodong; She, Yuecheng; Hong, Junming
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0960-8524)
- Published
- 2020
- Language
- EN
- Field
- Engineering (Physical Sciences)