Atthasit Tawai

Atthasit Tawai
King Mongkut's University of Technology North Bangkok | KMUTNB · The Sirindhorn International Thai-German Graduate School of Engineering (TGGS)

Doctor of Philosophy (Chemical Engineering)

About

23
Publications
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106
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Introduction
Atthasit Tawai currently works at the Chemical and Process Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB). Atthasit does research in Biotechnology, Petrochemistry and Chemical Biology. Their most recent publication is 'Effect of organic acid pretreatment of water hyacinth on enzymatic hydrolysis and biogas and bioethanol production'.

Publications

Publications (23)
Chapter
Cellulose has gained substantial attention from the R&D sector and industries as a potential feedstock for the production of biomaterials. Therefore, significant progress in the improvement of product development and process design has been enabled by using four main categories of celluloses, including cellulose-derived platform chemicals, natural...
Conference Paper
Full-text available
Commonly, the agricultural waste, i.e. lignocellulosic biomass is disposed through combustion causing air pollution with production of PM2.5 and PM10 particles. However, it has been found that these biomasses can be used as source for the production of biofuels and other valuable biochemicals. Though deconstruction of lignocellulosic biomass is cha...
Article
Polyhydroxy butyrate (PHB) is a polyester that has been widely applied to formulate bioplastics. A challenge for the PHB production is the enhancement of PHB accumulation in bacterial cells, which can be conducted through the nutrient feeding strategy. A control system based on an input/output (I/O) linearization technique for the PHB production in...
Chapter
Food packaging involves multi-step activities with the main purposes being to provide attractive products to customers and to maintain food quality at the standard level so that maximum nutritional values and minimum loss of products can be achieved. Nanotechnology is integrated into food packaging to improve food quality, to prevent food spoilage,...
Conference Paper
Full-text available
Anaerobic digestion (AD) process has been generally applied in factories for wastewater treatment and energy recovery. For the AD processes, the continuously stirred tank reactor (CSTR) with recirculation are typically applied in industries for methane production from wastewater treatment. Since the recycle stream affects the inlet concentration of...
Article
Full-text available
Due to rapid growth and uncontrolled spreading of water hyacinth in aquatic natural and urban niches, the conversion of this weed to value-added chemicals and biofuels leads to the reduction of pollution and greenhouse effect. The rate-limiting step of the conversion process is hydrolysis reaction of lignocellulosic biomass to sugars, which are sub...
Conference Paper
Due to rapid growth and uncontrolled spreading of water hyacinth in aquatic natural and urban niches, the conversion of this weed to value-added chemicals and biofuels leads to the reduction of pollution and greenhouse effect. The rate-limiting step of the conversion process is hydrolysis reaction of lignocellulosic biomass to sugars, which are sub...
Conference Paper
Ionic liquid (IL) pretreatment is an efficient method to improve the enzymatic hydrolysis. The limitation of using IL is its high cost, thus there is a need for improvement to make it feasible for industrial applications. In this research, IL, 1-ethyl-3-methyl-acetate (Emim-AC), pretreatment of rice straw was conducted by mixing with inorganic salt...
Article
This work develops a control strategy to handle coupling effects between the level and pH for a pH process with multiple titrant streams. The feedback controller is formulated based on a nonlinear optimization problem of an input/output (I/O) linearization for output tracking. In order to calculate the control actions and estimate the state disturb...
Article
Full-text available
Purification process of erythritol in industrial production are currently composed of multiple steps. To improve the purification efficiency and to operate the working condition precisely, the solubility property of erythritol should be monitored. In this study, the erythritol solubilities in aqueous solvents including methanol, ethanol and 2-propa...
Conference Paper
Pretreatment is a vital process for the conversion of lignocellulose biomass into energy. The pretreatment process is known to enhance solubilization and dissociation of the complex lignocellulose structure. This study focused on efficacy of ionic liquid pretreatment, using 1-ethyl-3-methylimidazolium acetate (EMIM-Ac), of rice straw for sugar prod...
Article
This work deals with the development and application of a model-based control system for an anaerobic digestion process which can recover energy using methane combustion. Due to the spatially distributed dynamics of some variables of the upflow anaerobic sludge blanket (UASB) reactor, a type of anaerobic digestion process, the traditional control s...
Article
Separation of two immiscible liquids by a decanter is an important unit operation widely used in petrochemical processes. However, fluctuations in the feed stream create a difficulty in achieving the desired product by such a unit due to the limitations of interface detection and entrainment of heavy phase into a light phase. This research proposes...
Article
A new nonlinear optimization control strategy is developed for multivariable control of an ill-conditioned, high-purity distillation column. A high-gain directional effect resulting from ill-conditioned nature of the system causes difficulty in controllability and requires a higher performance control system. The developed optimal controller applie...
Article
Full-text available
Production of specialty chemicals or bioproducts from lignocellulosic biomass has a major bottleneck at hydrolysis step due to recalcitrant structures of lignocellulose fibrils. Pretreatment is necessary to be executed to enhance saccharification efficiency. This study, the effect of acid pretreatment on lignocellulosic conversion of Napier grass w...
Article
A nonlinear optimization-based control system with analytical model predictive control (AMPC) structure is formulated in cascade with an off-line pseudo-steady-state calculator for an ethylene dichloride (EDC) cracking furnace process described by a coupled PDE/ODE model. The objective of the proposed control system is to control the EDC cracking r...
Article
An input-output (I/O) linearizing control scheme for a gas-fired thermal cracking furnace is developed for a tubular reactor coil, which is a type of tubular reactor surrounded by gas-fired burners in the furnace. Due to the simultaneous interaction between the spatially distributed dynamics of the reactor coil and the lumped radiating wall, the ty...
Conference Paper
This research presents a control scheme for a gas-fired ethylene dichloride (EDC) cracking furnace to handle a cracked gas temperature at the coil outlet. Input-output (I/O) linearizing control scheme is applied to the furnace model of which interaction between a lumped temperature of gas-fire radiating wall and spatially distributed dynamics of cr...
Article
This work proposed the extended technique of nonlinear feedback controller in (2) for nonlinear distributed parameter system governed by parabolic partial differential equations (PDEs). The concepts of modal decomposition and Galerkin projection under the assumption of discrete eigenspectrum in (7) are used to approximate the model in the form of o...

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