Modeling of a Continuous Anaerobic Digestion of Wastes

Comprehensive Local Sensitivity Analysis of the Adm1-Based Anaerobic Digestion Process

“…1). The firstorder biochemical process is assumed for all extracellular processes, while a Monod type is assumed for all intercellular reactions [2]. The influent's chemical oxygen demand (COD) is divided into 13 input state variables, 11 biodegradable, including a composite substrate, carbohydrates, proteins, lipids, sugars, amino acids, long-chain fatty acids, butyrate, valerate, propionate, and acetate.…”

“…Digestion occurs in digesters and local chambers, where fermentation reactions are regulated and optimized. Anaerobic digestion of organic wastes and industrial byproducts is a multi-stage complex process leading to biogas production, primarily composed of methane (CH 4 ) [2]. This method of energy generation, which has been used for centuries, is a viable alternative for sustainable energy production.…”

“…This method of energy generation, which has been used for centuries, is a viable alternative for sustainable energy production. Nevertheless, it does present some challenges inherent in the operation of such a complex and unpredictable system [2]- [4]. The biogas consists of CH 4 , CO 2 , H 2 , and H 2 S [5].…”

“…Biological reactions include disintegration, hydrolysis of suspended solids, microorganism uptake (growth), and decay. Ion association/dissociation and liquid-gas transfer are covered in physicochemical reactions [2]. The original ADM1 comprises 35 differential algebraic equations (DAE) organized into five groups used to simulate the concentrations and rates of numerous species in the liquid and gas phases.…”

“…Barahmand and Samarakoon [13] conducted an extensive literature review of different approaches to dealing with the uncertainty inherent to anaerobic digestion processes. Baldé et al [2] performed a sensitivity analysis on ADM1 to determine some ADM1 input state variables and related hydrolysis kinetics. Ramin et al [14] conducted a global sensitivity analysis using BSM2 on a secondary settling tank in the wastewater treatment plant.…”