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.

A method for the anaerobic cultivation of microorganisms includes providing an aqueous solution having a pH value of 4.5 to 7.5 in a container, adding a substrate in a first substrate dosage to the aqueous solution, adding further elements to the aqueous solution, adding an inoculant with microorganisms to the aqueous solution, hermetically sealing the container, varying a temperature in a range from 40 to 80 degrees Celsius, taking a reference liquid sample and determining a first concentration of organic substance in the reference liquid sample, taking another liquid sample and determining another concentration of organic substance in the further liquid sample after the expiration of the first waiting time, if the further concentration of organic substance is smaller than 10 percent of the first concentration of organic substance, adding substrate in another substrate dosage, repeating until a sufficient amount of biomass is present in the container.

A wastewater treatment equipment and a treatment method of a wastewater are provided. The wastewater treatment equipment includes: a microfiltration unit, configured to receive and filter a wastewater to obtain a solution; a membrane salt separation unit, configured to receive the solution and separate monovalent ions and multivalent ions from the solution to obtain a first solution including the monovalent ions and a second solution including the multivalent ions; a first evaporative crystallization unit, configured to crystallize the first solution to form a monovalent salt; and a second evaporative crystallization unit, configured to crystallize the second solution to form a mixed salt; the microfiltration unit is connected to the membrane salt separation unit, and the first evaporative crystallization unit and the second evaporative crystallization unit are both directly connected to the membrane salt separation unit, the wastewater treatment equipment can achieve the standard discharge of wastewater.

The invention generally relates to osmotically driven membrane systems and processes and more particularly to increased brine concentration for zero liquid discharge using osmotically driven membrane systems and processes and the related draw solute recovery techniques for the osmotically driven membrane systems and processes.

A system for dewatering a material comprising a first storage for holding a material, the first storage operably connected to a slitter, wherein the slitter receives the material, seperates the material into a plurality of clumps, and deposits the plurality of clumps of material substantially evenly on a conveyor belt, wherein the conveyor belt is partially porous to allow water to pass through but preventing material from passing through the conveyor belt, and wherein the conveyor belt is operable to convey the material from the slitter to a compression zone; the compression zone comprises at least one high pressure press, the at least one high pressure press comprises at least one hydraulic actuator operably connected to at least one compression plate, the at least one compression plate having a top surface, a bottom surface, and plurality of side surfaces, wherein the at least one hydraulic actuator articulates the at least one compression plates to engage the material positioned on the conveyor belt; the bottom surface comprises a recess substantially proximate the plurality of side surfaces, wherein the recess receives a seal when the at least one compression plate actuates to engage the material on the conveyor belt so the seal forms a substantially water-impervious barrier between the at least one compression plate and the conveyor belt defining a cavity in which the material is compressed; at least one knife positioned proximate the at least one compression plate operable to remove material from the bottom surface of the at least one compression plate after a compression cycle; and at least one drain positioned under the conveyor belt to carry water removed from the material away from the conveyor belt.

A modular, compact, mobile, dewatering and liquid-liquid separation and filtration system. The system processes incoming influents of slurries, solids and liquids at a high speed of operation and in large volumes. System is capable of being modularly scaled, allowing for a continuous steady state operation accommodating any slurry flow rate in a synchronous dynamic equilibrium process. Components and modules integrated into the system include a dynamic filtration clarifier 101 (DFC), a nested-filter dewatering cell 115 (NDC) and/or a compression filter press 125 (CFP). The DFC performs the primary dewatering phase of separating the primary water from the solids creating sludge. The NDC further breaks apart the solids of the sludge, removing interstitial water in a secondary dewatering phase, further lowering the moisture content of the sludge, while the CFP removes the tertiary water from the remaining solid particles by pressing the particles into a solid cake.

A solid-liquid separation device includes a kettle body, a piston, a stirrer, a separation plate having filtration pores, and a filtration mesh. The kettle body is hollow along an axial direction to form a chamber body. The separation plate is fitly installed in the chamber body, and divides the chamber body into a washing chamber and a draining chamber. The piston and the stirrer are fitly disposed in the washing chamber. The filtration mesh is attached on a side of the separation plate to cover the filtration pores. The kettle body is further provided with a feed inlet, a water inlet, a material outlet, and a liquid outlet. The feed inlet and material outlet are communicated with the washing chamber, and the water inlet and the liquid outlet are communicated with the draining chamber. The method includes the following steps: feeding, solid-liquid separation, washing, and material discharge.

A solid-liquid separation device includes a kettle body, a piston, a stirrer, a separation plate having filtration pores, and a filtration mesh. The kettle body is hollow along an axial direction to form a chamber body. The separation plate is fitly installed in the chamber body, and divides the chamber body into a washing chamber and a draining chamber. The piston and the stirrer are fitly disposed in the washing chamber. The filtration mesh is attached on a side of the separation plate to cover the filtration pores. The kettle body is further provided with a feed inlet, a water inlet, a material outlet, and a liquid outlet. The feed inlet and material outlet are communicated with the washing chamber, and the water inlet and the liquid outlet are communicated with the draining chamber. The method includes the following steps: feeding, solid-liquid separation, washing, and material discharge.

The present invention discloses a composite biogenic flocculant for enhancing flocculation and dewaterability of chemically enhanced primary treatment (CEPT) sludge. The present invention also discloses method of conditioning CEPT sludge using the composite biogenic flocculant.

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.