In the present work, a continuous process was developed for the production of advanced biobased hydrogen enriched methane, from crude glycerol in a two-stage reactor system. In the first step, biohydrogen production was studied, using attached mixed acidogenic consortia in an up-flow column bioreactor. Cylindrical ceramic beads with porosity corresponding to 600 mL were used as attachment matri...

The Internet is becoming increasingly important as a sales channel. Thus, most large retail firms have adopted a multi-channel strategy that includes both web-based channels and pre-existing off-line channels. Since competition exists between these two channels, for a supply chain with a dual-channel retailer, pricing in one channel will affect the demand in the other channel. This subsequently...

This paper studies a production system where products are produced continuously and whose specification limits are specified for screening inspection. This paper considers different costs associated with a quality characteristic that falls below a lower screening limit, or above an upper screening limit. Due to these different costs, the expected total profit will greatly depend on the process ...

At the initial stage of ship design, it is difficult for designers to define all design information of a hull structure on 2D drawings. Thus, other designers must undertake the arduous task of translating such information to generate a 3D CAD model of the hull structure which is required at the following design stage such as the initial process planning stage. Since this task needs much time an...

A new low-cost glucoamylase preparation for liquefaction and saccharification of starchy raw materials in a one-stage system was developed and characterized. A non-purified biocatalyst with a glucoamylase activity of 3.11 U/mg, an alpha-amylase activity of 0.12 WU/mg and a protein content of 0.04 mg protein/mg was obtained from a shaken-flask culture of the strain Aspergillus niger C-IV-4. Fact...

In recent years, variants of Kanban mechanisms are proposed to deal with different levels of uncertainties commonly exist in a typical production system. Among them, generalized Kanban control (Buzacott [1989]) mechanism gained popularity as it is able to deal with uncertainties effectively while maintaining pull philosophy. In literature, many models are developed to gain insights on the desig...

The scope of this work is the complete re-organization of production flow according to the Lean Thinking philosophy for the industrial applications. The complete re-organization implementation of material flow management has been performed through the supermarket sizing which replenishment kanban logic has been adopted. To implement this strategy the goal is to achieve "Interdependent connected...

BACKGROUND Biohythane production via two-stage fermentation is a promising direction for sustainable energy recovery from lignocellulosic biomass. However, the utilization of lignocellulosic biomass suffers from specific natural recalcitrance. Hydrothermal liquefaction (HTL) is an emerging technology for the liquefaction of biomass, but there are still several challenges for the coupling of HTL...