| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Search the digital library catalog Help

Query: search in
search in
search in
search in
* old and bologna study programme

Options:
  Reset


1 - 4 / 4
First pagePrevious page1Next pageLast page
1.
Improvement of biogas production utilizing a complex anaerobic digestion model and gradient-based optimization
Tina Kegl, Breda Kegl, Marko Kegl, 2024, original scientific article

Abstract: : Anaerobic digestion (AD) is a promising technology for renewable energy production from organic waste. In order to maximize the produced biogas quantity and quality, this paper deals with the optimization of the AD process in a CSTR bioreactor of a full-scale biogas plant. For this purpose, a novel approach was adopted coupling, a highly complex BioModel for AD simulation, and a gradient-based optimization method. In order to improve AD performance, the dosages of various types of biological additives, the dosages of inorganic additives, and the temperature in the bioreactor were optimized in three different scenarios. The best biogas quality was obtained using multi-objective optimization, where the objective function involves the following two conflicting objectives: the maximization of biogas production and minimization of the needed heating energy. The obtained results show that, potentially, the content of CH4 can be increased by 11%, while the contents of H2, H2S, and NH3 can be reduced by 30%, 20%, and 81% when comparing the simulation results with the experimental data. The obtained results confirm the usefulness of the proposed approach, which can easily be adapted or upgraded for other bioreactor types.
Keywords: additives, anaerobic digestion, approximation method, BioModel, complex substrate, gradient-based optimization, process conditions
Published in DKUM: 12.03.2024; Views: 256; Downloads: 15
.pdf Full text (7,33 MB)
This document has many files! More...

2.
Building of mini digester for mesophilic anaerobic digestion
Bogomir Muršec, Peter Vindiš, 2009, professional article

Abstract: Anaerobic digestion is the biological degradation of organic material in the absence of air andmayimply environmental benefits with regard to waste treatment, pollution reduction, energy production, and improvements in agricultural practices. Ananaerobic digester is a system that harnesses this natural process to treat waste, produce biogas that can be converted to heat and electricity and anaerobic digestate, a soil improving material. The paper presents the building of a mini digester for mesophilic anaerobic digestion.With the mini digester the amount of biogas production (methane) from different organic wastes is observed. The basic structure is made of stainless steel, on which other components are fixed. The most important components are the eudiometers, pump and heater with thermostat, fermenters, thermometer and barometer. The experiment is made according to DIN 38 414, part 8. After building of a mini digester some experiments with different organic materials are made.
Keywords: mini digester, mesophilic anaerobic digestion, organic wastes
Published in DKUM: 11.07.2017; Views: 1713; Downloads: 107
.pdf Full text (493,38 KB)
This document has many files! More...

3.
Biogas as a renewable energy source
Matjaž Ošlaj, Bogomir Muršec, 2010, review article

Abstract: Renewable energy technology does not simply produce energy, heat and transport fuel, but also offers the opportunity to live in the footsteps of a reasonable future development. In Europe and other industrialized regions, the main reason for the development of renewable energy is the environment, in particular the concern in relation to global climate change and the need to improve security and diversity of energy supply. In the developing countries, they promise a new hope for renewable primary energy supply in regions without conventional energy and provide an opportunity for sustainable development. Productionof "green energy" from biogas, which is among the renewable energy sources, promises an environmentally less damaging way of obtaining energy by reducing CO emissions into the environment and reduces energy dependence on imported energy sources. Biogas production is of major importance for the sustainable use of agrarian biomass as renewable energy source.
Keywords: anaerobic digestion, biogas, manure, renewable energy
Published in DKUM: 11.07.2017; Views: 1696; Downloads: 106
.pdf Full text (194,11 KB)
This document has many files! More...

4.
Search done in 0.89 sec.
Back to top
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica