• 文献标题:   New insights into enhanced anaerobic degradation of coal gasification wastewater (CGW) with the assistance of graphene
  • 文献类型:   Article
  • 作  者:   ZHU H, HAN YX, MA WC, HAN HJ, MA WW, XU CY
  • 作者关键词:   graphene, uasb, coal gasification wastewater, direct interspecies electron transfer
  • 出版物名称:   BIORESOURCE TECHNOLOGY
  • ISSN:   0960-8524 EI 1873-2976
  • 通讯作者地址:   Harbin Inst Technol
  • 被引频次:   2
  • DOI:   10.1016/j.biortech.2018.04.080
  • 出版年:   2018

▎ 摘  要

The up-flow anaerobic sludge blanket (UASB) system with graphene assisted was developed for coal gasification wastewater (CGW) treatment. Short-term results showed that optimal graphene addition (0.5 g/L) resulted in a more significant enhancement of methane production and chemical oxygen demand (COD) removal compared with that of the optimal activated carbon addition (10.0 g/L). Long-term results demonstrated that COD removal efficiency and methane production rate with graphene assisted achieved 64.7% and 180.5 mL/d, respectively. In addition, graphene could promote microbes accumulation and enzymes activity, resulting in higher extracellular polymeric substances (EPS) and coenzyme F-420 concentrations. X-ray Diffraction (XRD) analysis indicated that chemical of graphene changed insignificantly during the experiment. Meanwhile, with graphene assisted, cells were attached together to form microbial aggregates to facilitate sludge granulation process. Furthermore, the enriched Geobacter and Pseudomonas might perform direct interspecies electron transfer (DIET) with Methanosaeta via biological electrical connection, enhancing the anaerobic degradation of CGW.