Akademik Veri Yönetim Sistemi
International Conference on New Trends in Chemistry, Budapest, Macaristan, 19 - 21 Nisan 2024, ss.35-36, (Özet Bildiri)
It is becoming more crucial to find alternative sources for reuse purposes to reduce the
use of fossil sources for material production. The recovery of raw materials from wastewater
sources is a substantial resource-valorization approach, such as cellulose. The primary sludge
of the domestic wastewater comprises around 25-30 % of the lignocellulosic content, primarily
derived from lavatory tissue[1]. The high lignocellulosic content of airplane lavatory waste
makes it a viable substitute source for the recovery of cellulose. Although few studies have
investigated the recycling potential for aircraft lavatory wastewater[2,3], no earlier reports have
examined the potential use of recovered cellulose for bioethanol production in aircraft
wastewater. One of the usage alternatives for recovered cellulose is bioethanol production.
Cellulose and hemicellulose are composed of sugars. Nonetheless, lignocellulose makes up the
widely held of cellulose found in the natural world. The main components in lignocellulosic
biomass are cellulose, hemicelluloses, and lignin combined to form lignin-carbohydrates
complexes. These complexes are resistant to degradation because of their structural
characteristic and lignin encapsulation. However, the cellulose and hemicellulose content of
biomass determines its usefulness for bioethanol production. Thus, to convert cellulosic
biomass into biofuel, it is essential to apply the pre-treatment process to separate the cellulose
component from hemicelluloses and lignin. Subsequently,enzymatic hydrolysis can be
performed to liberate glucose for ethanol fermentation. Three distinct techniques were applied
as pre-treatment methods in the literature. These techniques involve physicochemical,
biological, and chemical pre-treatment methods using acids and alkali solutions. In this study,
the lignocellulosic component of the waste sludge was investigated to determine whether waste
sludge captured from coarse screens of the aircraft lavatory wastewater is acceptable for
recovery as bioethanol. Four different trials were conducted on the sample using two different
chemical alkali pre-treatment techniques [4,5]in an effort to determine the ratio of the cellulosehemicellulose-
lignin composition of the waste sludge. The average values of ash content, oil
content, hemicellulose, lignin, and cellulose ratio were found to be 4% (±0.2), 5% (±0.6), 26%
(±0.2), 51% (±3.6), and 14% (±1.1), respectively.