4.8 Article

Enhancing two-phase anaerobic digestion of mixture of primary and secondary sludge by adding granular activated carbon (GAC): Evaluating acidogenic and methanogenic efficiency

期刊

BIORESOURCE TECHNOLOGY
卷 363, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127900

关键词

Modified Gompertz model; First -order reaction; Extracellular polymeric substances; Dissolved organic matters; Electrical conductance

资金

  1. National Natural Science Foundation of China [52070173]
  2. Qingdao Science and Technology Benefit People Demonstration and Guidance Project [21-1-4-sf-12-nsh]
  3. Urban and Rural Housing Construction Science and Technology Project of Shandong [2021-K8-7]
  4. Canada Research Chair program
  5. State Administration of Foreign Experts Affairs
  6. High Level Foreign Experts [GDT20143200016]
  7. P.R. China to Nanjing University
  8. Einstein Professor Program of the Chinese Academy of Sciences
  9. Distinguished Visiting Professorship in the Department of Environmental Sciences, Baylor University in Waco, TX, USA

向作者/读者索取更多资源

This study found that the introduction of GAC in two-phase AD can enhance methane production and organic conversion.
Although the granular activated carbon (GAC) has been proved to enhance conventional single-phase anaerobic digestion (AD), how it impacts on acidogenic and methanogenic fermentation is still unknown. In this study, GAC was introduced to elevate the efficiency of two-phase AD, with mixture of primary and secondary sludge as substrate. Five dosages: 0, 0.1, 0.3, 0.5 and 0.7 g GAC/g TSS (Total Suspended Solids) were investigated to determine influences of GAC. The variations of biogas (hydrogen and methane), volatile fatty acids (VFAs), organics degradation and transformation in extracellular polymeric substances (EPS) and dissolved organic matters (DOM) were analyzed. Modified Gompertz model and first-order reaction equation was applied to analyze the kinetics of biogas yield and VFAs utilization, respectively. Sludge reduction, electrical conductance and pH were also quantified to evaluate the system performance. The results showed that GAC could improve two-phase AD performance by enhancing methane production and organics conversion.

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