Abstract: The present disclosure generally relates to a method and a system for controlling the pretreatment and/or enzymatic hydrolysis of a lignocellulosic material. The method and system allow for savings with respect to energy consumption and costs.

Abstract: The present disclosure generally relates to a controlled method for pretreatment and/or enzymatic hydrolysis of a lignocellulosic material. The method comprises first pretreating the lignocellulosic material suboptimally, and then subjecting the material to mechanical refining.

Abstract: The present disclosure generally relates to a method for treatment of a lignocellulosic biomass. The method comprises the steps of pretreating the lignocellulosic biomass material in a pretreatment arrangement to form a pretreated biomass slurry; optionally hydrolysing the pretreated biomass slurry in a hydrolysis unit; retrieving gaseous SO2 from the pretreatment arrangement to provide an SO2 gas stream; treating the SO2 gas stream with an alkaline solution to provide a sulfite/bisulfite solution; supplying at least a part of the sulfite/bisulfite solution to at least one of: a) the lignocellulosic biomass material prior to pretreating the lignocellulosic biomass material in the pretreatment arrangement; b) the lignocellulosic biomass material n the pretreatment arrangement; c) the pretreated biomass slurry discharged from the reactor vessel; d) the hydrolysate or fermentable sugars of the hydrolysate.

Abstract: The present disclosure generally relates to a method for controlled pretreatment of lignocellulosic biomass. The method comprises the steps of: Pretreating (S10) a lignocellulosic biomass material in a pretreatment arrangement, the pretreating comprising impregnating (S10A) the lignocellulosic biomass with an SO2 feed in an impregnation vessel of the pretreatment arrangement; collecting (S20) a number of process parameters of the pretreatment, which process parameters include at least a feed parameter related to the total amount of lignocellulosic biomass input to the pretreatment arrangement, and a dry matter parameter related to the dry matter content of lignocellulosic biomass input to the pretreatment arrangement; and adjusting (S30) the SO2 feed in response to the process parameters.

Abstract: The present disclosure generally relates to a pretreatment arrangement (100) for pretreatment of lignocellulosic biomass. The pretreatment arrangement (100) comprises a reactor vessel (101) having an upstream inlet (102) for receiving biomass and a downstream outlet for discharging biomass (103). The pretreatment arrangement (104) further comprises a sluice vessel (104). The present disclosure also relates to a method (200) for pretreating lig- nocellulosic biomass.

Abstract: The present disclosure generally relates to a pretreatment arrangement (100) for pretreatment of lignocellulosic biomass comprising a reactor vessel (101) having an upstream inlet (102) for receiving biomass and a downstream outlet (103) for discharging biomass. The pretreatment arrangement (100) further comprises a gas valve (104) and gas flow control means (106).

Abstract: The present disclosure generally relates to a pretreatment arrangement (100) for pretreatment of lignocellulosic biomass comprising a reactor vessel (101) extending along a longitudinal center line (102) and having an upstream inlet (103) for receiving biomass and a downstream outlet (104) for discharging biomass. The pretreatment arrangement (100) further comprising a scraping device (108) configured to scrape the interior walls (111) of the reactor vessel (101) and prevent the formation and build-up of deposits.

Abstract: The present disclosure generally relates to a method and a system for forming a storage stable hydrolysate from a lignocellulosic material and to a hydrolysate formed by such a method. It also relates to the use of the hydrolysate to reduce and/or control microbial contamination during storage and/or fermentation. Additionally, the present disclosure relates to a method and a system for reducing and/or controlling microbial contamination in a separate hydrolysis and fermentation (SHF) process.

Abstract: There is provided a method of producing a hydrolysate containing sugar from a lingocellulosic biomass, comprising the steps of: a) pretreating the lingocellulosic biomass in a pretreatment process to form a slurry comprising cellulosic particles; b) saccharification of the slurry obtained in step a) in the presence of hydrolytic enzymes in an enzymatic hydrolysis process to obtain a hydrolysate containing sugar; c) analyzing cellulosic particles present in the slurry obtained in step a) and/or cellulosic particles present in the enzymatic hydrolysis process during step b) using an image analysis method to obtain a data set; and d) controlling at least one process parameter of the pretreatment process in step a) and/or enzymatic hydrolysis process in step b) in response to the data set obtained in step c). A corresponding system is also provided.

Abstract: There is provided a method of producing a hydrolysate containing sugar from a lingocellulosic biomass, comprising the steps of: a) pretreating the lingocellulosic biomass in a pretreatment process to form a slurry comprising cellulosic particles; b) saccharification of the slurry obtained in step a) in the presence of hydrolytic enzymes in an enzymatic hydrolysis process to obtain a hydrolysate containing sugar; c) analyzing cellulosic particles present in the slurry obtained in step a) and/or cellulosic particles present in the enzymatic hydrolysis process during step b) using an image analysis method to obtain a data set; and d) controlling at least one process parameter of the pretreatment process in step a) and/or enzymatic hydrolysis process in step b) in response to the data set obtained in step c). A corresponding system is also provided.