The “sludge dehydrator” equipment is a machine that permits to remove low turbidity water from sludge or watery pastes of industrial or mining origin, with the following objectives: To optimize ore recovery processes such as flotation by means of an increase of the sludge density; To thicken sludge or watery pastes for optimizing the filtering and drying processes, as well as to dispose of mining tailings; To concentrate and dispose of solids in suspension and to recover and recycle clean or clarified water. The “sludge dehydrator” equipment has been designed on the basis of a rectangular tank provided with the necessary infrastructure for containing inside a series of suction plates being connected to a vacuum system, through which the process of solid-liquid separation is carried out and, on the other hand, to contain the cleaning mechanism—the cleaning car—with its motor system made up by pneumatic or hydraulic components required to clean suction plates the filtering medium and to keep them permanently operative. In accordance with the “sludge dehydrator” feeding and the design of the lower or bottom cone of the rectangular tank will benefit to be derived from the industrial and mining operation.

A fluid separator unit includes an elongate body having a circular internal cross-section and a longitudinal axis, an inlet which directs a fluid flow into the body in a rotational flow pattern around the longitudinal axis, a first outlet, a second outlet, a first centrifugal separation zone arranged within the body, a second centrifugal separation zone arranged within the body, a first fluid path from a central part of the first centrifugal separation zone to the first outlet, a second fluid path from an outer periphery of the second centrifugal separation zone to the first outlet, and a third fluid path from the second centrifugal separation zone to the second outlet. A diameter of the second centrifugal separation zone is smaller than a diameter of the first centrifugal separation zone.

A method and equipment for removing ammonia nitrogen from electrolytic manganese residue are provided in the technical field of solid waste resource utilization. The method includes following steps: step 1: adding phosphate and magnesium salt into electrolytic manganese residue leachate and fully reacting, where after the phosphate and the magnesium salt are added, n (Mg):n (N):n (P)=1.1-1.3:1:1 in the electrolytic manganese residue leachate; step 2: on a basis of the step 1, adjusting pH of the electrolytic manganese residue leachate to alkalinity, and stirring and reacting for 10-30 min; and step 3: on a basis of the step 2, filtering the electrolytic manganese residue leachate to obtain purified leachate and struvite respectively.

Disclosed is a rake-free thickening device including driving area. The device includes a feed assembly, a diversion assembly and a clean coal collection assembly. The clean coal collection assembly includes a driving area. The diversion assembly includes a central tank. Slime water passes through the feed assembly and flows with a medicament from an upper part of the central tank to a middle of the central tank, and then diffuses around. Bubbles carry the fine slime up after reacting. The driving zone drives the dispersed bubbles to a defoaming zone located in the middle of the central tank. The slime water in the central tank flows through the central tank after defoaming. With the continuously filling of slime water, the slime water above the central tank overflows the central tank to the clean coal collection assembly within the diversion and settlement area.

A flow back system for separating solids from a slurry recovered from a hydrocarbon well. The system includes a V-shaped tank with a first series of baffles configured to cause the settling of solids that are moved by a shaftless auger to a conduit fluidly connected to a dispersing device mounted over or adjacent to a shaker such as a linear shaker. The shaker receives and processes the output of the dispersing device and dewaters solids. The underflow of the shaker is recirculated through the tank.

A method of treating oil and gas produced water may include: receiving produced water from one or more wells; separating an aqueous portion of the produced water from oil and solids included in the produced water in order to provide recovered water; performing anaerobic bio-digestion of organic matter included in the produced water using a biomass mixture of anaerobic bacteria obtained from a plurality of wells; aerating the recovered water in order to promote metal precipitation; and performing aerobic bio-digestion of organic matter present in the recovered water. Some embodiments may also include one or more of anoxic equalization, filtration, pasteurization, reverse osmosis, and biocide treatment of the recovered water. The recovered water may be used for oil and gas well fracking and/or land and stream application. Other methods of treating oil and gas produced water are also described.

A method and a system for purification of contaminated oil. Said method comprises the steps of: —providing contaminated oil and a separation aid in a tank (3); —waiting for allowing a sludge phase comprising the separation aid together with impurities from the oil to settle in a bottom part (4) of the tank (3); —reusing the sludge phase for purification of new contaminated oil.

A sludge dewatering tank that includes a first wall, a second wall, a third wall, a fourth wall and a bottom that cooperate to define a tank interior, a first interior wall and a second interior wall. The first interior wall cooperates with the first wall to define a first drainage compartment and includes at least a first filter member. The first drainage compartment includes at least a first drain that communicates the first drainage compartment with an exterior of the sludge dewatering tank. The second interior wall cooperates with the second wall to define a second drainage compartment and includes at least a second filter member. The second drainage compartment includes at least a second drain that communicates the second drainage compartment with the exterior of the sludge dewatering tank. The first interior wall cooperates with the second interior wall to define a sludge space therebetween.

A collection and concentration system including a separation tank having a plurality of distribution arms configured to separate and recover oil, water, and sediment or sand from an inflowing mixture of the same. The distribution arms are connected to and in fluid communication with a downcomer section of a center column that is vertically arranged in the separation tank. The distribution arms extend radially toward a sidewall of the tank and include tangential discharge nozzles that are tangentially directed toward the sidewall. Inflowing mixture directed tangentially against the sidewall is directed in a downward, helical manner that assists in the separation and recovery of oil, water, and sediment from the inflowing mixture.

A method of treating oil and gas produced water may include: receiving produced water from one or more wells; separating an aqueous portion of the produced water from oil and solids included in the produced water in order to provide recovered water; performing anaerobic bio-digestion of organic matter included in the produced water using a biomass mixture of anaerobic bacteria obtained from a plurality of wells; aerating the recovered water in order to promote metal precipitation; and performing aerobic bio-digestion of organic matter present in the recovered water. Some embodiments may also include one or more of anoxic equalization, filtration, pasteurization, reverse osmosis, and biocide treatment of the recovered water. The recovered water may be used for oil and gas well fracking and/or land and stream application. Other methods of treating oil and gas produced water are also described.