One embodiment provides a method for monitoring the quality of nanofibrillar cellulose produced in a process comprising disintegrating fibers of cellulose pulp, the method comprising measuring in real-time optically the turbidity of a dispersion containing nanofibrillar cellulose obtained from a disintegrating process, and determining the quality of said produced nanofibrillar cellulose using a correlation between the measured turbidity and said quality of the produced nanofibrillar cellulose, wherein lowered turbidity indicates increased quality of the nanofibrillar cellulose. One embodiment provides a device for monitoring the quality of nanofibrillar cellulose produced in a process comprising disintegrating fibers of cellulose pulp, arranged to carry out said method.

One embodiment provides a method for monitoring the quality of nanofibrillar cellulose produced in a process comprising disintegrating fibers of cellulose pulp, the method comprising measuring in real-time optically the turbidity of a dispersion containing nanofibrillar cellulose obtained from a disintegrating process, and determining the quality of said produced nanofibrillar cellulose using a correlation between the measured turbidity and said quality of the produced nanofibrillar cellulose, wherein lowered turbidity indicates increased quality of the nanofibrillar cellulose. One embodiment provides a device for monitoring the quality of nanofibrillar cellulose produced in a process comprising disintegrating fibers of cellulose pulp, arranged to carry out said method.

A system and method of manufacturing a feedstock for producing paper fiber from fruit of a plant may include providing a by-product source inclusive of fiber from the edible fruit after a process for removing a majority of the edible fruit is used to produce a food. One or more treatment processes to brighten the fruit by-product may be performed. The feedstock may be produced from the brightened fruit by-product.

A system and method of manufacturing a feedstock for producing paper fiber from fruit of a plant may include providing a by-product source inclusive of fiber from the edible fruit after a process for removing a majority of the edible fruit is used to produce a food. One or more treatment processes to brighten the fruit by-product may be performed. The feedstock may be produced from the brightened fruit by-product.

An aqueous composition comprising: sulfuric acid; a heterocyclic compound; an alkanesulfonic acid; and a peroxide. Said composition being capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place.

Some variations provide a process for producing a nanocellulose material, comprising: providing a biomass feedstock comprising a bleached or unbleached pulp material; fractionating the feedstock in the presence of an acid, a solvent for lignin, and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form cellulose fibrils and/or cellulose crystals, thereby generating a nanocellulose material. The process is preferably co-located with, or adjacent to, a mill that generates the pulp material. There are several advantages of a bolt-on AVAP nanocellulose plant to an existing pulp mill, as disclosed herein.

Some variations provide a process for producing a nanocellulose material, comprising: providing a biomass feedstock comprising a bleached or unbleached pulp material; fractionating the feedstock in the presence of an acid, a solvent for lignin, and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form cellulose fibrils and/or cellulose crystals, thereby generating a nanocellulose material. The process is preferably co-located with, or adjacent to, a mill that generates the pulp material. There are several advantages of a bolt-on AVAP nanocellulose plant to an existing pulp mill, as disclosed herein.

Disclosed herein are compositions and products of Arundo grass plants and methods of producing the same.

A method for separating biomass components by a ternary system, which relates to a technical field of biomass separation, and includes the following steps of: cooking and separating a biomass raw material by using a cooking liquor consisting of organic acid, small aromatic nucleophilic organic molecule and hydrogen peroxide to obtain solid residue and extracting solution, washing and screening the solid residue to obtain paper pulp, and separating and extracting lignin and/or hemicellulose from the extracting solution. This cooking system could effectively minimize the content of residual lignin and other compounds with chromophore groups in the obtained pulp, directly producing the high-whiteness pulp with excellent performance without additional bleaching process. In addition, the hemicellulose saccharides and high-activity lignin can be also obtained, so that the method has an important significance for realizing high value and industrialization of biomass resource utilization.

Processes for converting lignocellulose to feedstock and downstream products are disclosed. The processes may include acid treatment of lignocellulose to produce a fermentation feedstock. In various instances, the processes include recovery or recycling of acid, such as recovery of hydrochloric acid from concentrated and/or dilute streams. Downstream products may include acrylic acid-based products such as diapers, paper and paper-based products, ethanol, biofuels such as biodiesel and fuel additives, and detergents.