sc6b01665_si_001.pdf (126.59 kB)
Utilization of Organosolv Waste Waters as Liquid Phase for Hydrothermal Carbonization of Chaff
journal contribution
posted on 2016-08-31, 00:00 authored by Barbara Weiner, Harald Wedwitschka, Juergen Poerschmann, Frank-Dieter KopinkeOrganosolv wastewater
was used as the liquid source during the
hydrothermal carbonization (HTC) of chaff at 200 °C for 4 h and
compared to a control HTC of chaff in water. The produced hydrochars
had a carbon content of 58 wt % and a higher heating value (HHV) of
23 MJ kg–1 independently of the employed liquid
source. Concentrations of inorganic elements were analyzed as well
as organic acids in the process water. The use of organosolv wastewater
had no negative effects on the HTC process and hydrochar properties.
Subsequently, the HTC process waters were used for biomethane production.
Performing HTC in organosolv water led to a doubling of the biomethane
yield as compared to water as liquid source. The use of this industrial
wastewater in combination with the solid agricultural waste chaff
has the potential of increasing the sustainability of the HTC process
by the disposal of two waste stream sources at the same time as well
as by reducing the amount of contaminated waters that would eventually
have to be treated.