Commercialization of second generation cellulosic ethanol is a reality. It's has taken several years for some companies to develop the technology for commercial production. There are different technologies used to produce this fuel. However further optimization are required to make this commodity more affordable. One of the common steps in the process that can be further optimized is a faster liquefaction of the already pretreated slurry as well as enzyme reutilization which both would contribute greatly on capital and production cost reduction. Faster liquefaction not only can reduce the time and simplify the equipment of the process but also provide a possibility to increase the final concentration of sugar. In this study a newly developed technology reduces liquefaction time to 3 hour or less as compared to 8-20 hours as reported by others by using a continuous mixing device for instantaneous, uniform enzyme distribution in high-solids concentration of biomass and a specially designed plug flow reactor where the liquefaction takes place. Figure 1 show a fully automated newly developed pilot scale liquefaction system. Moreover, latest results using a chilled recirculation stream intended to recycle enzymes and cool down newly incoming material have shown that the time for liquefaction can even be reduced further to only 1-2 h. Rheology variables and sugar yields studies on this system have shown that the reutilization of pre-liquefied material and hence recycled enzymes perform better on newly incoming material than as if compared to a system without recirculation.