The present disclosure relates to a system and process for separating sand and gravel in sediments of a sewage pipe network and recycling organic matters. The system includes a conveying grid plate, a mud outlet is provided below the conveying grid plate, and a masonry conveying area is provided at one side of the conveying grid plate; a fiber crushing tank, disposed below the mud outlet, and a crushing device is disposed below the mud outlet; a masonry scouring and recycling tank, provided with an interception grille located at one side of the masonry conveying area, a flushing device is disposed above the interception grille, a masonry outlet is provided in the masonry scouring and recycling tank, the masonry scouring and recycling tank is communicated with a muddy water return pipe, and the muddy water return pipe is communicated with the mud outlet.

In the management of a facility pumping water from a natural environment containing impurities, the facility makes use of at least one rotary filter purifying the pumped water while some impurities at least partially clog the rotary filter. In particular, provision is made for estimating an evolution over time of a pressure loss caused by impurities clogging the rotary filter, based at least on data relating to the natural environment, dimensions of the rotary filter, and local measurements relating to at least one water level N.sub.amont upstream of the filter and to a flow rate of water Q.sub.aspiré drawn in downstream of the filter. Such an estimate of the evolution over time of the pressure loss makes it possible to anticipate possible risks of insufficient water supply to the pumping system (POM) downstream of the filter (FIL), or even to design filters (FIL) adapted to the needs of specific pumping facilities.

In the management of a facility pumping water from a natural environment containing impurities, the facility makes use of at least one rotary filter purifying the pumped water while some impurities at least partially clog the rotary filter. In particular, provision is made for estimating an evolution over time of a pressure loss caused by impurities clogging the rotary filter, based at least on data relating to the natural environment, dimensions of the rotary filter, and local measurements relating to at least one water level N.sub.amont upstream of the filter and to a flow rate of water Q.sub.aspiré drawn in downstream of the filter. Such an estimate of the evolution over time of the pressure loss makes it possible to anticipate possible risks of insufficient water supply to the pumping system (POM) downstream of the filter (FIL), or even to design filters (FIL) adapted to the needs of specific pumping facilities.

The invention relates to a method and an apparatus for washing a crude lignin slurry (5) formed from plant based raw material, wherein the method comprises separating a soluble carbohydrate containing fraction (10) from the crude lignin slurry (5) by using displacement washing in at least one solid-liquid separation stage (6) so that the crude lignin slurry is prepressed, washed and pressed, and recovering a solid fraction (11) and the soluble carbohydrate containing fraction (10). Further, the invention relates to the soluble carbohydrate containing fraction and the solid fraction, and their uses.

The invention relates to a method and an apparatus for washing a crude lignin slurry (5) formed from plant based raw material, wherein the method comprises separating a soluble carbohydrate containing fraction (10) from the crude lignin slurry (5) by using displacement washing in at least one solid-liquid separation stage (6) so that the crude lignin slurry is prepressed, washed and pressed, and recovering a solid fraction (11) and the soluble carbohydrate containing fraction (10). Further, the invention relates to the soluble carbohydrate containing fraction and the solid fraction, and their uses.

A system and process for closed loop system for removing particulate from a coal fired power wash water waste stream comprising a submerged flight conveyor for receiving used wash water, a bleed line for diverting wash water from the submerged flight conveyor, a filter for removing particulate from the diverter wash water, and pumps to recirculate the wash water on a loop through the system.

A liquid solid separator has a main container wherein a rotating filter belt receives influent for liquid sold mixture sieve processing. Various recirculation systems are proposed including an external pump sump, internal pump recirculation and dual pumps with one disposed externally in a sump and one internally in the lower basin of the container. Recirculation points include an inflow pipe connection, an influent basin connection located above the influent basin and influent basin connection located underneath the liquid solid mixture influent level.

A liquid solid separator has a main container wherein a rotating filter belt receives influent for liquid sold mixture sieve processing. Various recirculation systems are proposed including an external pump sump, internal pump recirculation and dual pumps with one disposed externally in a sump and one internally in the lower basin of the container. Recirculation points include an inflow pipe connection, an influent basin connection located above the influent basin and influent basin connection located underneath the liquid solid mixture influent level.

A liquid solid separator has a main container wherein a rotating filter belt receives influent for liquid sold mixture sieve processing. A filtered water collections tank, a pressurized water supply are sources of wash water inputs. Cold and hot water pressurized water supplies are also potential supply sources. Load balancing of inputs and single and dual wash water pumps are also described.

A liquid solid separator has a main container wherein a rotating filter belt receives influent for liquid sold mixture sieve processing. A filtered water collections tank, a pressurized water supply are sources of wash water inputs. Cold and hot water pressurized water supplies are also potential supply sources. Load balancing of inputs and single and dual wash water pumps are also described.