The present application provides a method for fully recycling kitchen waste by using Hermetia illucens L. and aerobic microorganisms. The method includes first performing solid-liquid separation on the kitchen waste; then using the filtrate obtained through separation to feed young larvae of Hermetia illucens L. to convert salt in the filtrate into body fluid of Hermetia illucens L. in a larval stage, and using the kitchen waste filter residue to feed 2.sup.nd-6.sup.th-instar larvae of Hermetia illucens L. respectively; separating insects and insect feces residue in a timely manner, so as to reduce a salt content of insect feces and improve transabdominal transformation efficiency of Hermetia illucens L. and quality of the insect manure; and finally implementing full resource utilization through aerobic composting and insect drying and sterilization treatment.

The present application provides a method for fully recycling kitchen waste by using Hermetia illucens L. and aerobic microorganisms. The method includes first performing solid-liquid separation on the kitchen waste; then using the filtrate obtained through separation to feed young larvae of Hermetia illucens L. to convert salt in the filtrate into body fluid of Hermetia illucens L. in a larval stage, and using the kitchen waste filter residue to feed 2.sup.nd-6.sup.th-instar larvae of Hermetia illucens L. respectively; separating insects and insect feces residue in a timely manner, so as to reduce a salt content of insect feces and improve transabdominal transformation efficiency of Hermetia illucens L. and quality of the insect manure; and finally implementing full resource utilization through aerobic composting and insect drying and sterilization treatment.

A method for producing mixed metal salts containing manganese ions and at least one of cobalt ions and nickel ions, the method including: an Al removal step of subjecting an acidic solution containing at least manganese ions and aluminum ions, and at least one of cobalt ions and nickel ions, to removal of the aluminum ions by extracting the aluminum ions into a solvent, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a precipitation step of neutralizing an extracted residual liquid obtained in the Al removal step under conditions where a pH is less than 10.0, to precipitate mixed metal salts comprising a metal salt of manganese and a metal salt of at least one of cobalt and nickel.

An apparatus, system and redox membrane for efficient lithium-ion extraction from natural salt waters or geothermal brines or manmade sources such as from lithium battery recycling are provided. The redox membrane is selective for lithium ions over other spectator ions making the system capable of selectively extracting lithium-ions from multiple-ion source solutions. The system uses the redox membrane as an electrochemically active material acting as a Li-selective membrane for direct lithium extraction from a lithium-ion source. The redox membrane is also not porous to solvents and is stable in caustic and high temperature environments. The features of the redox membrane and system allow the recovery of lithium from low purity sources and the production of higher purity products at reduced costs and process steps over conventional processes.

The purpose of the present disclosure is to provide a method for producing pulp fibres for saccharification from the pulp fibres of used sanitary items, said pulp fibres for saccharification having low lignin contents distributed within a narrow range, and enabling the production of pulp fibres for saccharification having superior saccharification properties. The production method according to the present disclosure is characterised by comprising the following: a step for supplying a mixed solution (51) containing pulp fibres and highly-absorbent polymers sourced from used sanitary items to a treatment tank (31) via a mixed-solution supply port (32); a step for supplying an ozone-containing gas (53) to a treatment solution (52) within the treatment tank (31) via an ozone-containing-gas supply port (43); a step for lifting the ozone-containing gas (53) whilst lowering the pulp fibres and highly-absorbent polymers within the treatment tank (31), thereby bringing the ozone-containing gas (53) into contact with the pulp fibres and highly-absorbent polymers, and forming pulp fibres for saccharification from the pulp fibres; and a step for discharging the treatment solution (52) via a treatment-solution discharge port (33). The method is further characterised in that the pulp fibres for saccharification have lignin contents of 0.1% or less.

The purpose of the present disclosure is to provide a method for producing pulp fibres for saccharification from the pulp fibres of used sanitary items, said pulp fibres for saccharification having low lignin contents distributed within a narrow range, and enabling the production of pulp fibres for saccharification having superior saccharification properties. The production method according to the present disclosure is characterised by comprising the following: a step for supplying a mixed solution (51) containing pulp fibres and highly-absorbent polymers sourced from used sanitary items to a treatment tank (31) via a mixed-solution supply port (32); a step for supplying an ozone-containing gas (53) to a treatment solution (52) within the treatment tank (31) via an ozone-containing-gas supply port (43); a step for lifting the ozone-containing gas (53) whilst lowering the pulp fibres and highly-absorbent polymers within the treatment tank (31), thereby bringing the ozone-containing gas (53) into contact with the pulp fibres and highly-absorbent polymers, and forming pulp fibres for saccharification from the pulp fibres; and a step for discharging the treatment solution (52) via a treatment-solution discharge port (33). The method is further characterised in that the pulp fibres for saccharification have lignin contents of 0.1% or less.

A method for dissolving a lithium compound according to the present invention includes bringing a lithium compound into contact with water or an acidic solution, and feeding, separately from the lithium compound, a carbonate ion to the water or the acidic solution to produce carbonic acid, and allowing the carbonic acid to react with the lithium compound to produce lithium hydrogen carbonate.

A method for dissolving a lithium compound according to the present invention includes bringing a lithium compound into contact with water or an acidic solution, and feeding, separately from the lithium compound, a carbonate ion to the water or the acidic solution to produce carbonic acid, and allowing the carbonic acid to react with the lithium compound to produce lithium hydrogen carbonate.

A self-contained material separator system utilizing a vacuum and blower system, a separator assembly, and a collection assembly to separate and process waste material generated from material handling and processing devices. The material separator may further be self-contained and portable to provide flexibility in the use and deployment thereof.

A self-contained material separator system utilizing a vacuum and blower system, a separator assembly, and a collection assembly to separate and process waste material generated from material handling and processing devices. The material separator may further be self-contained and portable to provide flexibility in the use and deployment thereof.