Parametric and Nonparametric Approaches
for Detecting the most Important Factors
in Biogas Production

Ošlaj, Matjaž; Šumenjak, Tadeja Kraner; Lakota, M.; Vindis, P.

doi:10.15244/pjoes/84768

Cited by 3 publications

(3 citation statements)

References 34 publications

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“…To prevent a false trail, criteria are needed which penalize excessive parametrization or "overfitting" and complexity. Some studies [12,65] use either a modification of R 2 called adjusted-R 2 and marked as R…”

Section: Model Name Model Equation Referencesmentioning

confidence: 99%

Existing Empirical Kinetic Models in Biochemical Methane Potential (BMP) Testing, Their Selection and Numerical Solution

Pererva

Miller

Sims

2020

Water

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Biochemical Methane Potential (BMP) tests are a crucial part of feasibility studies to estimate energy recovery opportunities from organic wastes and wastewater. Despite the large number of publications dedicated to BMP testing and numerous attempts to standardize procedures, there is no “one size fits all” mathematical model to describe biomethane formation kinetic precisely. Importantly, the kinetics models are utilized for treatability estimation and modeling processes for the purpose of scale-up. A numerical computation approach is a widely used method to determine model coefficients, as a replacement for the previously used linearization approach. However, it requires more information for each model and some range of coefficients to iterate through. This study considers existing empirical models used to describe biomethane formation process in BMP testing, clarifies model nomenclature, presents equations usable for numerical computation of kinetic parameters as piece-wise defined functions, defines the limits for model coefficients, and collects and analyzes criteria to evaluate and compare model goodness of fit.

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Section: Model Name Model Equation Referencesmentioning

confidence: 99%

Existing Empirical Kinetic Models in Biochemical Methane Potential (BMP) Testing, Their Selection and Numerical Solution

Pererva

Miller

Sims

2020

Water

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“…Similarly, carbon is the main element in biomass for the production of methane. Carbon present as carbohydrates, lipids, or proteins is sequentially converted to low weight acids (acetic, propionic, and butyric) and then to acetic acid and hydrogen and ultimately to methane, carbon dioxide, and other by-products [46]. e oxygen and carbon levels at retention day 28 are thus the lowest in the series.…”

Section: Bioslurry Oxygen Calcium Carbon and Potassiummentioning

confidence: 99%

Optimization of Bioslurry-Available Plant Nutrients Using T. brownii and Acanthaceae spp. Biocatalysts

Chaka

Aloys

Maghanga³

et al. 2020

Advances in Agriculture

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The plant extracts of T. brownii and Acanthaceae spp. have been used as biocatalysts by several communities in Kenya to hasten anaerobic digestion. This study aimed at assessing the viability of these two extracts in hastening the availability of plant nutrients from bioslurry at ambient conditions. A controlled research design was followed using uncooked kitchen waste as the substrate for 28 retention days. Changes in bioslurry physicochemical properties and available plant nutrients were monitored every 7 days using wet chemistry and spectroscopic methods. The findings indicated that the two extracts significantly impacted the levels of available plant nutrients in the bioslurry compared to the control samples. T. brownii additives significantly increased the levels of lime content, total Kjeldahl nitrogen, total phosphorus, phosphoric acid, sulfur, and soluble silicic acid. On the contrary, Acanthaceae spp. additives significantly increased the levels of calcium, potassium, nitrates, total ammoniacal nitrogen, sulfates, and phosphates in the bioslurry samples. The use of these plant extracts thus reduces the time taken while increasing the concentration of available plant nutrients from bioslurry.

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“…The test reactor can be used for biogas testing of other different organic waste materials (waste, water). Some results measuring biogas with experimental digester from various energy crops can be seen in different literature [5][6].…”

Section: Stirrer Outflowmentioning

confidence: 99%

Construction, operation and measuring process of test reactor for biogas production

Vindis¹,

Kelc²,

Lakota³

et al. 2020

Poljoprivredna tehnika

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The purpose of the research is to build an experimental reactor to study and optimize the production of biogas and its composition from energy crops and other materials of organic origin. An experimental reactor in a biogas plant was constructed for the anaerobic digestion of various substrates. With the experimental reactor, anaerobic digestion can be performed with the basic substrate of pig manure and in different compositions of the substrate. The substrate can be assembled in various combinations of energy crops. The method of construction of the experimental reactor was based on the standard method DIN 38 414, also with the mentioned method we produce biogas under normal conditions from various substrates. The process also determines the quality of biogas or methane content. The built biogas reactor is a reduced version of the economic reactor and serves to optimize the production of biogas in economic conditions.

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Parametric and Nonparametric Approaches for Detecting the most Important Factors in Biogas Production

Cited by 3 publications

References 34 publications

Existing Empirical Kinetic Models in Biochemical Methane Potential (BMP) Testing, Their Selection and Numerical Solution

Existing Empirical Kinetic Models in Biochemical Methane Potential (BMP) Testing, Their Selection and Numerical Solution

Optimization of Bioslurry-Available Plant Nutrients Using T. brownii and Acanthaceae spp. Biocatalysts

Construction, operation and measuring process of test reactor for biogas production

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