Original sentence: In fact, Ammonia Fiber Expansion (AFEX) is the sole pretreatment which features promising pretreatment efficiency with no inhibitory effect in resulting hydrolysate.To date, the available pretreatment techniques include acid hydrolysis, steam explosion, ammonia fiber expansion, alkaline wet oxidation and ozone pretreatment
Edited sentence: (2009) Sulfite pretreatment (SPORL) for Robust enzymatic saccharification of spruce and red pine, Bioresource technology 100:2411-2418.<ref>, alkaline wet oxidation and ozone pretreatment.However, AFEX is not effective for high lignin content biomass such as forest biomass.In fact, Ammonia Fiber Expansion (AFEX) is a promising pretreatment efficiency with no inhibitory effect in resulting hydrolysate.SPORL is the most energy efficient (sugar production per unit energy consumption in pretreatment) and robust process for pretreatment of forest biomass, especially those of softwood species.To date, the available pretreatment techniques include acid hydrolysis, steam explosion, ammonia fiber expansion, sulfite pretreatmet to overcoem recalcitrance of lignocellulsoe (SPORL) <ref> Zhu et al