  In this study faecal sludge is used as raw biomass due to its abundance, low
cost, and easy availability. After HTL operation, product separation is getting
challenging. Current developed studies observed the separation of aqueous and
biocrude oil products occurs during the HTL process more popularly with the use
of an organic solvent which is quite expensive. Focusing on this critical
issue, this study aims to separate the biocrude and aqueous phase without using
any solvent by gravity separation technique. From FTIR analysis data it showed
that centrifuged at 6000 rpm partial separation of biocrude and aqueous phase
(AP) was noticed. however, at 9000 rpm, FTIR analysis showed that biocrude
samples included aliphatic hydrocarbons, phenols, and esters where no signs of
any carbon chain were found at AP which indicated the products are successfully
separated. The separated Crude portion had the higher A-Factor (0.68) and lower
C-Factor (0.58) value which indicates the oil quality was immature grade of
lower kerogen type II (i.e., moderate oil-prone). This low-cost technique can
be economically advantageous for commercial-scale biocrude production.
