An apparatus for facilitating particle separation by density includes a separator having an inner surface surrounding a rotation axis and defining a particle path from an input end to an axially spaced output end. The inner surface includes a plurality of axially spaced dividers having respective inner positions, defining at least in part respective axially spaced retainers for collecting particles during rotation of the separator. The retainers each include at least one fluid inlet for fluidizing particles in the retainer during operation. The dividers include a first pair of adjacent dividers and a second pair of adjacent dividers, the first pair nearer the input end than the second pair, wherein a first divider slope of the first pair is greater than a second divider slope of the second pair and wherein each of the first and second divider slopes is zero or positive. Other systems, apparatuses and methods are disclosed.

An apparatus for facilitating particle separation by density includes a separator having an inner surface surrounding a rotation axis and defining a particle path from an input end to an axially spaced output end. The inner surface includes a plurality of axially spaced dividers having respective inner positions, defining at least in part respective axially spaced retainers for collecting particles during rotation of the separator. The retainers each include at least one fluid inlet for fluidizing particles in the retainer during operation. The dividers include a first pair of adjacent dividers and a second pair of adjacent dividers, the first pair nearer the input end than the second pair, wherein a first divider slope of the first pair is greater than a second divider slope of the second pair and wherein each of the first and second divider slopes is zero or positive. Other systems, apparatuses and methods are disclosed.

The present invention relates to a method for enhancing deep degradation of proteins in sludge. The method includes the following steps: an anaerobic digestion product of excess sludge as a substrate is treated by Van Soest's washing method to obtain the sludge free of easily degradable organics and containing degradation-resistant proteins; then, with the anaerobic digestion product of excess sludge as an inoculum and the sludge free of easily degradable organics and containing degradation-resistant proteins as a substrate, a first-stage microbial electrolytic cell coupled anaerobic digestion system is started for treatment to obtain a microbial mixture related to targeted degradation of the degradation-resistant proteins; with the microbial mixture related to targeted degradation of the degradation-resistant proteins as an inoculum and the anaerobic digestion product of excess sludge as a substrate, a second-stage microbial electrolytic cell coupled anaerobic digestion system is started to obtain the sludge with deeply degraded proteins.

A submersible substance separator system having an outer chamber, a top cover plate, an upper cup, a disc stack separator; a middle cup, a submersible actuator, a lower cup, and an interior chamber within the outer chamber; in which one section of the disc stack separator is configured to lead, in response to centrifugal forces, a first separated substance into the upper cup and subsequently into the outer chamber until it reaches a chamber outlet corresponding to the outer chamber; and wherein another section of the disc stack separator is configured to release, in response to centrifugal forces, a second separated substance into the interior chamber until it reaches a chamber outlet corresponding to the interior chamber.

The present disclosure provides a solid waste treatment method, including following steps: screening off masses having a particle size greater than 0.5 cm from solid waste; adding extraction agents to the solid waste and then heating and stirring so that the solid waste is fully dispersed in the extraction agents; placing the mixed extraction agent in a centrifuge and centrifuging the mixed extraction; feeding liquid phase separated by centrifuging into a rectification tower for rectification and cooling, recovering residual oil substances in a rectification kettle, separating mixture of cooled extraction agents and water, continuously adding the separated extraction agents into an extraction kettle for cyclic extraction, and conveying sewage to a sewage treatment plant to treat and discharging the sewage after the sewage reaches a treatment standard.

The present invention relates to an in-line blending apparatus and use therein for flocculating and dewatering an aqueous mineral suspension. Said method comprises blending an aqueous mineral suspension and a poly(ethylene oxide) (co)polymer using a progressive cavity pump. Said method is particularly useful for the treatment of suspensions of particulate material, especially waste mineral slurries, especially for the treatment of tailings and other waste material resulting from mineral processing, in particular, the processing of oil sands tailings.

The present invention relates to an in-line blending apparatus and use therein for flocculating and dewatering an aqueous mineral suspension. Said method comprises blending an aqueous mineral suspension and a poly(ethylene oxide) (co)polymer using a progressive cavity pump. Said method is particularly useful for the treatment of suspensions of particulate material, especially waste mineral slurries, especially for the treatment of tailings and other waste material resulting from mineral processing, in particular, the processing of oil sands tailings.

A portable waste treatment apparatus for treating hydro-excavation waste includes an elongate frame formed from separable upper and lower frame sections mounted upon one another. The upper frame section houses a mixing tank for receiving waste slurry and for mixing the waste slurry with flocculating and/or coagulating agents. A thickener tank receives waste slurry from the mixing tank, and a dewatering device is provided for dewatering sludge collected in the thickener tank. The lower frame section houses a buffer tank arranged to receive sludge from a sludge outlet of the thickener tank. A pump is provided for pumping the sludge to the dewatering device, and a water tank is arranged to receive water overflowing from the thickener tank.

A portable waste treatment apparatus for treating hydro-excavation waste includes an elongate frame formed from separable upper and lower frame sections mounted upon one another. The upper frame section houses a mixing tank for receiving waste slurry and for mixing the waste slurry with flocculating and/or coagulating agents. A thickener tank receives waste slurry from the mixing tank, and a dewatering device is provided for dewatering sludge collected in the thickener tank. The lower frame section houses a buffer tank arranged to receive sludge from a sludge outlet of the thickener tank. A pump is provided for pumping the sludge to the dewatering device, and a water tank is arranged to receive water overflowing from the thickener tank.

A method of processing pulp, extracted from red mud in processing bauxite, includes the following steps. The pulp is filtered to obtain a first filter cake and a first filtrate. Aluminum is leached from the first filter cake by adding, to the first filter cake, sodium hydroxide (NaOH) solution to form an aluminum-containing first slurry. The first slurry is filtered to obtain an aluminum-containing second filter cake and a second filtrate. From the second filtrate, in presence of carbon dioxide gas, first aluminum compounds are filtered out. Aluminum is leached out from the second filter cake by adding, to the second filter cake, NaOH solution to form a second slurry. The second slurry is filtered to obtain a third filter cake and an aluminum-containing third filtrate. From the third filtrate, second aluminum compounds are precipitated out which include sodium hydroaluminocarbonate and aluminum hydroxide.