Instituto Tecnológico de Morelia

About: Instituto Tecnológico de Morelia is a education organization based out in Morelia, Mexico. It is known for research contribution in the topics: Electric power system & AC power. The organization has 498 authors who have published 572 publications receiving 4600 citations.

Production of 2,3‐butanediol by fermentation of enzymatic hydrolysed bagasse from agave mezcal‐waste using the native Klebsiella oxytoca UM2‐17 strain

Abstract: BACKGROUND: 2,3‐butanediol is a chemical component with wide industrial applications, such as biofuels and chemical precursors. Reducing 2,3‐butanediol production costs is a high priority and recent focus has been on its biological synthesis from raw renewable materials rather than through conventional chemical procedures. In this study, a 2,3‐butanediol native bacterial producer was selected for the fermentation of Agave cupreata bagasse waste by enzymatic hydrolysation to obtain 2,3‐butanediol. RESULTS: The native Klebsiella oxytoca UM2‐17 strain was selected to efficiently produce 2,3‐butanediol on synthetic mineral media. Using glucose (100 g L⁻¹) and glucose: xylose (50 g L⁻¹:50 g L⁻¹) as sugar sources obtained titres of 29.36 g L⁻¹ and 25.9 g L⁻¹ of 2,3‐butanediol, corresponding to yields of 0.29 g g⁻¹ and 0.26 g g⁻¹, respectively. Agave bagasse solid waste after acid pre‐treatment was utilized to obtain enzymatic hydrolysates, obtaining liquors with glucose/xylose/arabinose at 25.8 g L⁻¹ with efficiency of ∼52.5% sugar conversion from residual solid pre‐hydrolysed bagasse. The production of 2,3‐butanediol through batch fermentation of the enzymatic‐hydrolysate by the UM2‐17 strain showed total depletion of glucose and xylose, achieving a maximal production of 10.3 g L⁻¹ of 2,3‐butanediol plus 0.28 g L⁻¹ ethanol, corresponding to 2,3‐butanediol yield of 0.40 g g⁻¹. CONCLUSION: The results indicate that A. cupreata bagasse waste from mezcal beverage elaboration is a sustainable bioresource for production of 2,3‐butanediol by fermentation of enzymatic bagasse‐hydrolysate using the K. oxytoca UM2‐17 strain. © 2019 Society of Chemical Industry

Transmission Expansion Planning Considering an Hourly Demand Curve

Abstract: This paper discusses the impact that different approximations have on the Transmission Expansion Planning (TEP) problem. Due to the long decision horizons involved, the number of variables can make the problem intractable if approximations to the problem are not made. Furthermore, new emerging technologies and changes in the way we operate our systems are putting under scrutiny some of the approximations usually made to the problem. In this context, this paper evaluates the effect on investment and operational costs of including operational constraints of generators (ramping), transmission losses, and N-1 security constraints on the TEP problem. TEP is formulated as a mixed-integer linear program (MILP). We first validate our analysis using the Garver test system. Then, the importance of including the aforementioned constraints to TEP is tested with the 24-bus and 118-bus IEEE systems. Our results show that additional transmission capacity may be required to satisfy the flexibility requirements caused by net load ramps.