This study evaluates the impact of yeast strain selection on ethanol yield from KMnO₄-pretreated rice straw, integrating process design and utility cost analysis. KMnO₄—a cost-effective, widely available, less toxic alternative to acid pretreatments—is applied at a 1.36% concentration. Fermentation 49 mg/mL sugar solution using four strains identified Pichia kudriavzevii TISTR 5147 (PK 5147) as most efficient, achieving 93.59% conversion—significantly outperforming Saccharomyces cerevisiae...

Production of specialty chemicals or bioproducts from lignocellulosic biomass has a major bottleneck at hydrolysis step due to recalcitrant structures lignocellulose fibrils. Pretreatment is necessary be executed to enhance saccharification efficiency. This study, the effect acid pretreatment on conversion of Napier grass was evaluated based Response Surface Methodology (RSM). conditions were optimized for oxalic, citric, acetic, and hydrochloric acids. Validation indicated that models were...

The present study investigated the antioxidant activities of methanolic extracts two local plants and their capacities to preserve quality viscera fish oil during storage. total phenolic, flavonoids tannins contents were analyzed by colorimetry, preliminary tests done identification phenolic compounds HPLC-DAD (Diode Array Detector) ESI-MS. After these evaluation, plant added in at concentration 200-1000 ppm. oxidative stability samples was evaluated measuring qualities indices 16 days 70...

An input–output (I/O) linearizing control scheme for a gas-fired thermal cracking furnace is developed tubular reactor coil, which type of surrounded by burners in the furnace. Due to simultaneous interaction between spatially distributed dynamics coil and lumped radiating wall, typical proportional-integral-derivative widely used industry may have insufficient performance handle complexity. In this work, feedback I/O controller applied system that described coupled PDE-ODE model: ethylene...

A nonlinear optimization-based control system with analytical model predictive (AMPC) structure is formulated in cascade an off-line pseudo-steady-state calculator for ethylene dichloride (EDC) cracking furnace process described by a coupled partial differential equation/ordinary equation model. The objective of the proposed to EDC rate at desired set points manipulating fuel gas flow constraints avoid extensive coke formation. To handle complex behaviors that are affected radiating walls...

A two-stage anaerobic digestion (AD) process has been applied to improve the efficiency of methane production from various organic materials. However, performance traditional controllers may be limited by differences in rate biochemical reactions, uncertainties, and consequences interconnection between two bioreactors. In this work, a nonlinear optimization-based control strategy that applies an analytical model predictive (AMPC) scheme with adaptive optimal set-point is proposed for AD...

Water hyacinth, an invasive species in natural water habitats, poses ecological challenges but also holds promise as a biofuel resource due to its abundant biomass. To optimize sugar yield for production, this study focuses on pretreating hyacinth with acetic acid (AC) using Response Surface Methodology (RSM). Comparing AC, hydrochloric (HA), and untreated samples, AC-pretreated samples yielded the highest content at 28.26 g/100 g of biomass, nearly 1.97 times higher than that samples....

Pathogenic microbial metabolism during food storage can lead to spoilage, which cause poisoning and foodborne infections, posing a significant risk human health safety. Additionally, spoilage generates greenhouse gases, could contribute global warming have impacts. These challenges prompt us explore effective solutions reduce aiming mitigate its adverse Many secondary plant metabolites been used in the pharmaceutical industries due their natural antimicrobial activity low drug resistance....

Oriental Journal of Chemistry is a peer reviewed quarterly research journal pure and applied chemistry. It publishes standard papers in almost all thrust areas current chemistry academic commercial importance. provides platform for rapid publication quality papers, reviews letters. abstracted indexed reputed National International agencies.

Abstract Due to rapid growth and uncontrolled spreading of water hyacinth in aquatic natural urban niches, the conversion this weed value-added chemicals biofuels leads reduction pollution greenhouse effect. The rate-limiting step process is hydrolysis reaction lignocellulosic biomass sugars, which are subsequently converted biochemicals biofuels. To improve enzymatic efficiency hyacinth, organic acid pretreatments were conducted study by using two types acids, including oxalic citric acid....

A new nonlinear optimization control strategy is developed for multivariable of an ill-conditioned, high-purity distillation column. high-gain directional effect resulting from the ill-conditioned nature system causes difficulty in controllability and requires a higher performance system. The optimal controller applies minimization energy consumption as objective function to treat ill-conditioning effect, while wavelet neural network input/output linearizing constraints force outputs reach...

This work develops a control strategy to handle coupling effects between the level and pH for process with multiple titrant streams. The feedback controller is formulated based on nonlinear optimization problem of an input/output (I/O) linearization output tracking. In order calculate actions estimate state disturbances simultaneously, integrated disturbance estimator combined into developed structure. proposed applied outlet liquid reactor system achieve desired setpoints by adjusting...

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 spatially distributed dynamics some variables upflow sludge blanket (UASB) reactor, type process, traditional systems may have insufficient performance handle complexity. An input-output (I/O) linearizing scheme UASB reactor is developed two-step (acidogenesis-methanogenesis) kinetic model described by coupled...