Anaerobic fermentation of hydrothermal liquefaction wastewater of dewatered sewage sludge for volatile fatty acids production with focuses on the degradation of organic components and microbial community compositions
Zheng Chen , Yue Rao , Muhammad Usman , Huihui Chen , Andrzej Białowiec , Shicheng Zhang , Luo Gang
AbstractHydrothermal conversion (HTC) is a promising technology for the treatment of dewatered sewage sludge to produce bio-fuels including bio-oil and hydrochar. At the same time, a huge amount of wastewater (HTCWW) was produced. The present study investigated the organic compositions of HTCWW obtained at different HTC temperatures (170-320 °C) and volatile fatty acids (VFAs) yields through anaerobic fermentation. Results showed that the highest VFAs yield of 0.59 gCODVFA/gCOD was obtained from HTCWW obtained at 170 °C (HTCWW 170). Higher amount of easily biodegradable organics including proteins and carbohydrates were present in HTCWW 170 °C, which resulted in the highest VFAs yields. With the increase of HTC temperature, recalcitrant organic compounds were produced as revealed by 3D-EEM and GC–MS analysis, which resulted in lower VFAs yields. Furthermore, microbial analysis showed that different compositions in the HTCWW led to the enrichment of different microbial communities, which affected the VFAs yields.
|Journal series||Science of the Total Environment, ISSN 0048-9697, e-ISSN 1879-1026, (N/A 200 pkt)|
|Keywords in English||Dewatered sewage sludge, Hydrothermal conversion wastewater, Volatile fatty acids, Anaerobic fermentation|
|ASJC Classification||; ; ;|
|Score||= 200.0, 20-04-2021, ArticleFromJournal|
|Publication indicators||= 0; : 2016 = 1.849; : 2019 = 6.551 (2) - 2019=6.419 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.