Title of article :
Use of biochars in anaerobic digestion
Author/Authors :
Mumme، نويسنده , , Jan and Srocke، نويسنده , , Franziska and Heeg، نويسنده , , Kathrin and Werner، نويسنده , , Maja، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Abstract :
This study investigated the behavior of biochars from pyrolysis (pyrochar) and hydrothermal carbonization (hydrochar) in anaerobic digestion regarding their degradability and their effects on biogas production and ammonia inhibition. A batch fermentation experiment (42 °C, 63 days) was conducted in 100 mL syringes filled with 30 g inoculum, 2 g biochar and four levels of total ammonium nitrogen (TAN). For pyrochar, no clear effect on biogas production was observed, whereas hydrochar increased the methane yield by 32%. This correlates with the hydrochar’s larger fraction of anaerobically degradable carbon (10.4% of total carbon, pyrochar: 0.6%). Kinetic and microbiota analyses revealed that pyrochar can prevent mild ammonia inhibition (2.1 g TAN kg−1). Stronger inhibitions (3.1–6.6 g TAN kg−1) were not mitigated, neither by pyrochar nor by hydrochar. Future research should pay attention to biochar–microbe interactions and the effects in continuously-fed anaerobic digesters.
Keywords :
Anaerobic digestion , degradation kinetics , Ammonia inhibition , Methanogenic microflora , Biochar
Journal title :
Bioresource Technology
Journal title :
Bioresource Technology