A hydrothermal liquefaction (HTL) system can comprise a biomass slurry source, a first pump in fluid communication with the slurry source and configured to pressurize a biomass slurry stream from the slurry source to a first pressure, a first heat exchanger in fluid communication with the first pump and configured to heat a slurry stream received from the first pump to a first temperature, a second pump in fluid communication with the first heat exchanger and configured to pressurize a slurry stream received from the first heat exchanger to a second pressure higher than the first pressure, a second heat exchanger in fluid communication with the second pump and configured to heat a slurry stream received from the second pump to a second temperature higher than the first temperature, and a HTL reactor configured to produce biocrude from a slurry stream received from the second heat exchanger.

A highly efficient and effective process for destroying organic contaminants in wastewater streams, without the need for supercritical oxidation conditions, is provided.

A highly efficient and effective process for destroying organic contaminants in wastewater streams, without the need for supercritical oxidation conditions, is provided.

The present invention relates to supercritical water oxidation reactor adapted to contain inside the reactor an aqueous fluid below and above its supercritical state, said fluid comprising organic and/or inorganic material and a method of controlling such a reactor.

There is provided a method of treatment of sludge, such as municipal or industrial sludge from a wastewater treatment plant, comprising the steps of: preheating an incoming sludge with at least one steam fraction, preferably by direct steam injection, to obtain a preheated sludge; further heating the preheated sludge with a high-temperature steam fraction, preferably by direct steam injection, to obtain a heated sludge; hydrothermal carbonization (HTC) of the heated sludge to obtain a HTC-treated sludge; separating a particle-lean fraction from the HTC-treated sludge; wet oxidation of the particle-lean fraction to obtain a heated particle-lean fraction; subjecting the heated particle-lean fraction to a first flashing to obtain the high-temperature steam fraction used in the further heating step; separating a particle-rich fraction from the HTC-treated sludge; subjecting the particle-rich fraction to flashing to obtain at least one steam fraction that is used in the preheating step and a cooled particle-rich fraction.

There is provided a method of treatment of sludge, such as municipal or industrial sludge from a wastewater treatment plant, comprising the steps of: preheating an incoming sludge with at least one steam fraction, preferably by direct steam injection, to obtain a preheated sludge; further heating the preheated sludge with a high-temperature steam fraction, preferably by direct steam injection, to obtain a heated sludge; hydrothermal carbonization (HTC) of the heated sludge to obtain a HTC-treated sludge; separating a particle-lean fraction from the HTC-treated sludge; wet oxidation of the particle-lean fraction to obtain a heated particle-lean fraction; subjecting the heated particle-lean fraction to a first flashing to obtain the high-temperature steam fraction used in the further heating step; separating a particle-rich fraction from the HTC-treated sludge; subjecting the particle-rich fraction to flashing to obtain at least one steam fraction that is used in the preheating step and a cooled particle-rich fraction.

The invention provides a process for treating waste water from an industrial process for producing propylene oxide, which process comprises subjecting the waste water to a catalytic wet oxidation treatment in the presence of a catalyst comprising metal nanoparticles-doped porous carbon beads.

The invention provides a process for treating waste water from an industrial process for producing propylene oxide, which process comprises subjecting the waste water to a catalytic wet oxidation treatment in the presence of a catalyst comprising metal nanoparticles-doped porous carbon beads.

The present subject matter relates to the development of active catalyst composite based on supported transition metal oxides, especially, Cu, Co that are effective in the removal sulfides in the diluted spent caustic. The process for the reduction of sulfides in spent caustic comprises of reacting various organic and inorganic sulfides with molecular oxygen in the presence of active catalyst at various reaction temperatures ranging ambient to 200 C. and pressures between atmospheric pressure to 60 bars. The process also relates to complete scheme for the removal of sulfides in spent caustic.

The present subject matter relates to the development of active catalyst composite based on supported transition metal oxides, especially, Cu, Co that are effective in the removal sulfides in the diluted spent caustic. The process for the reduction of sulfides in spent caustic comprises of reacting various organic and inorganic sulfides with molecular oxygen in the presence of active catalyst at various reaction temperatures ranging ambient to 200 C. and pressures between atmospheric pressure to 60 bars. The process also relates to complete scheme for the removal of sulfides in spent caustic.