Methods and systems for treating oil sands tailings streams at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises providing a tailings stream including 10-55% solids by total weight, increasing the pH of the tailings stream by combining the tailings stream with lime to produce a lime-tailings mixture having a pH of at least 11.0, and dewatering the lime-tailings mixture to produce a first stream having 10% or less solids by total weight and a second stream having 50% or more solids by total weight. The first stream can correspond to a release water stream, and the second stream can correspond to a cake. The lime slurry can include about 10% lime by total weight, and can comprise lime hydrate, quicklime, or a combination thereof. Dewatering the lime-tailings mixture can include routing the lime-tailings mixture to a centrifuge unit and/or a pressure or vacuum filtration unit.

A lightweight aluminum container body is provided which is typically of much greater length than the prior art. The container body which has a series of removable filter sections is provided. The container body which includes a top pivoting rear gate sealed by dual hydraulic piston arrangement and manual vice locks is provided. The container body having a central wall supporting a novel manifold and inlet drain offset system is provided which automatically controls the sludge and inlet drain flow in a way that positionally balances sediment deposit.

A lightweight aluminum container body is provided which is typically of much greater length than the prior art. The container body which has a series of removable filter sections is provided. The container body which includes a top pivoting rear gate sealed by dual hydraulic piston arrangement and manual vice locks is provided. The container body having a central wall supporting a novel manifold and inlet drain offset system is provided which automatically controls the sludge and inlet drain flow in a way that positionally balances sediment deposit.

The invention relates to a method for aerobic and anaerobic cultivation of microorganisms. The invention also relates to a method for producing a preparation for cleaning contaminated liquids and surfaces. Likewise, the invention relates to a method for cleaning contaminated liquids and surfaces.

A lightweight aluminum container body is provided which is typically of much greater length than the prior art. The container body which has a series of removable filter sections is provided. The container body which includes a top pivoting rear gate sealed by dual hydraulic piston arrangement and manual vice locks is provided. The container body having a central wall supporting a novel manifold and inlet drain offset system which automatically controls the sludge inlet drain flow and way the positionally balances sediment deposit is provided.

A lightweight aluminum container body is provided which is typically of much greater length than the prior art. The container body which has a series of removable filter sections is provided. The container body which includes a top pivoting rear gate sealed by dual hydraulic piston arrangement and manual vice locks is provided. The container body having a central wall supporting a novel manifold and inlet drain offset system which automatically controls the sludge inlet drain flow and way the positionally balances sediment deposit is provided.

The invention relates to a tailings settling-dewatering-solidifying device and an experimental method thereof, which falls into the technical field of mine engineering and mine geotechnical engineering, comprising a tailings settling device including a water tank, charging barrels I and II, and a reaction tank made of a transparent material, a dewatering device including an intelligent type controller, a circular base, a gas cylinder, a permeable stone, a piston, a metal rod and a water return barrel, a solidifying device including a charging barrel III and a tailings barrel, a stirring system including a stirrer, a rotary shaft and an electric motor, a dynamic real-time monitoring system including a high-definition electronic camera and a computer, and a three-layer framework. Through integration of tailings settling-dewatering-solidifying, the device can effectively improve tailings treatment efficiency, facilitate data collection and analysis, adjust medicament concentration in real time, meet enterprises' requirements, and reduce enterprise cost.

The invention relates to a tailings settling-dewatering-solidifying device and an experimental method thereof, which falls into the technical field of mine engineering and mine geotechnical engineering, comprising a tailings settling device including a water tank, charging barrels I and II, and a reaction tank made of a transparent material, a dewatering device including an intelligent type controller, a circular base, a gas cylinder, a permeable stone, a piston, a metal rod and a water return barrel, a solidifying device including a charging barrel III and a tailings barrel, a stirring system including a stirrer, a rotary shaft and an electric motor, a dynamic real-time monitoring system including a high-definition electronic camera and a computer, and a three-layer framework. Through integration of tailings settling-dewatering-solidifying, the device can effectively improve tailings treatment efficiency, facilitate data collection and analysis, adjust medicament concentration in real time, meet enterprises' requirements, and reduce enterprise cost.

Disclosed are methods of dewatering solid byproduct. In some embodiments, the solid byproduct contains particles and is produced from a fermentation process for making an oxygenated compound such as ethanol. The method comprises a chemical sequence for conditioning (pre-treating) the solid byproduct to be dewatered. The solid byproduct (in water) is treated with alkaline material to increase its pH to about 7-8.5. Coagulant is added to the alkaline-treated solid byproduct to reduce charge on the solid byproduct. An agglomerating polymer is then added to increase the average size of the solid byproduct particles to a desired size (e.g., at least about 1 mm). Dewatering can further use known technologies such as screw press, belt press, filter press, centrifuge, and/or a dryer to separate the conditioned or pre-treated byproduct from water. Also disclosed are methods of producing oxygenated product, as well as methods of producing animal feed and/or fertilizer, respectively.

The disclosure relates to a treatment method for sludge utilization in a sewage treatment plant, in particular to a method for reducing heavy metal content of sludge-based biocoke. The disclosure includes following steps (1) to (5): step (1): concentrating a residual sludge produced by a municipal sewage treatment plant to be with a moisture content of 95-98%; step (2): conditioning the concentrated sludge in a sludge bioleaching tank for 48 hours, with a pH value of the sludge being reduced to below 4.5; step (3): pumping the conditioned sludge into a high-pressure diaphragm plate and frame for a press filter dewatering to obtain a dewatered cake with a moisture content less than or equal to 50%; step (4): delivering the dewatered cake into a sludge dryer for crushing, heating and drying to obtain the dried sludge with a moisture content of 15-22%; and step (5): carbonizing the dried sludge into sludge-based biocoke at a high temperature in a pyrolytic carbonization device with a carbonization temperature of 500-650° C.