The influence of mixing inside the fermentation reactors during the study of biogas efficiency of the substrates in mesophilic technology

Along with the development of environmental friendly technologies, an increasing interest in generating the electricity and heat from renewable sources has been observed in Poland. Perfect example of such installations are agricultural biogas plants, where methane fermentation produces high-energy gas fuel i.e. biogas. Before investing, it is necessary to perform a detailed studies of the biogas efficiency of the substrates used. The proper run of fermentation process, as well as the high biogas production related to the operation, depend on many factors, including the mixing inside the reactor. The DIN 38 414-S8 standard, commonly used in the tests, assumes the mixing of the whole eudiometric sets, used in accredited laboratory units, which due to their uniform construction may cause problems. The aim of the study was to determine the effect of laboratory mixing in the fermentation reactor on the biogas efficiency of the maize straw. The experiment tests were performed in the Laboratory of Ecotechnologies, in the Poznan, in accordance with the current standard DIN 38 414-S8.The obtained research results confirmed the effect of mixing inside the fermentation reactors on the biogas efficiency of the maize straw.

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Biogas production in the methane fermentation of excess sludge oxidized with Fenton’s reagent

E3S Web of Conferences ◽

10.1051/e3sconf/201911600104 ◽

2019 ◽

Vol 116 ◽

pp. 00104

Author(s):

Iwona Zawieja ◽

Kinga Brzeska

Keyword(s):

Fermentation Process ◽

Biogas Production ◽

Process Conditions ◽

Oh Radicals ◽

Fenton’S Reagent ◽

Iron Ions ◽

Fenton Reagent ◽

Excess Sludge ◽

Methane Fermentation ◽

Fenton's Reagent

The advanced oxidation processes (AOPs) play an important role in the degradation of hardly decomposable organic pollutants. AOPs methods rely on the production of highly reactive hydroxyl OH• radicals. The aim of the conducted research was to intensify biogas production in the methane fermentation process of excess sludge subjected to the process of deep oxidation with Fenton's reagent. In the process of oxidation of sewage sludge with the Fenton reagent, doses of iron ions in the range 0.02–0.14 g Fe2+/g TS (total solids) were used Hydrogen peroxide was measured in the proportions 1: 1–1:10 in relation to the mass of iron ions. The basic substrate of the study was excess sludge. In the case of excess sludge oxidation with the use of Fenton's reagent, the most favorable process conditions were considered to be the dose of iron ions 0.08 g Fe2+/g d.m. and a Fe2+: H2O2 ratio of 1:5. As a result of subjecting the excess sludge to disintegration with the Fenton reagent in the above-mentioned dose, with respect to the fermentation process of unprocessed sludge, about two-fold increase in the digestion degree of excess sludge and about 35% increase of the biogas yield was obtained.

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The usefulness of sugar beets for biogas production in relations of the storage time and sugar content

E3S Web of Conferences ◽

10.1051/e3sconf/20184400114 ◽

2018 ◽

Vol 44 ◽

pp. 00114 ◽

Cited By ~ 2

Author(s):

Natalia Mioduszewska ◽

Mariusz Adamski ◽

Anna Smurzyńska ◽

Jacek Przybył ◽

Krzysztof Pilarski

Keyword(s):

Sugar Beet ◽

Storage Time ◽

Fermentation Process ◽

Biogas Production ◽

Sugar Content ◽

Storage Period ◽

Methane Fermentation ◽

Sugar Beets ◽

Biogas Yield

The aim of the study was to evaluate the usefulness of sugar beet for biogas production, taking into account the duration time of storage and sugar content in the roots. The research has included analysis of methane and biogas yield of sugar beet. The relations between the sugar content in the roots and the length of storage period and the course of the methane fermentation process were determined. Sugar beets with sugar content of 17.6% and 19.6% were used for this experiment. In order to analyse the fermentation process, the fresh beets and the beets stored in flexible, hermetic tanks in the period of 43 and 89 days were used. Based on the analysis of the obtained results, it was found that the sugar content and the storage time of sugar beet roots can differentiate the production of biomethane and that it influences the methane fermentation process and the quality of the produced biogas.

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Impact of Adding Biopreparations on the Anaerobic Co-Digestion of Sewage Sludge with Grease Trap Waste

Civil and Environmental Engineering Reports ◽

10.1515/ceer-2016-0045 ◽

2016 ◽

Vol 22 (3) ◽

pp. 167-179 ◽

Cited By ~ 1

Author(s):

Małgorzata Worwąg

Keyword(s):

Sewage Sludge ◽

Fermentation Process ◽

Hydraulic Retention Time ◽

Biogas Production ◽

Methyl Esters ◽

Production Plant ◽

Similar Relationship ◽

Methane Fermentation ◽

Grease Trap Waste ◽

Mesophilic Conditions

Abstract The aim of the study was to evaluate the effect of using biopreparations on efficiency of the co-fermentation process. Commercial bacterial biopreparations DBC Plus Type L, DBC Plus Type R5 and yeast biopreparations were used in the study. The process of cofermentation of sewage sludge with grease trap waste from a production plant that manufactured methyl esters of fatty acids was analysed in the laboratory environment under mesophilic conditions. The sludge in the reactor was replaced once a day, with hydraulic retention time of 10 days. Grease trap waste accounted for 35%wt. of the fermentation mixture. The stabilization process was monitored everyday based on the measurements of biogas volume. Addition of yeast biopreparation to methane fermentation of sewage sludge with grease trap waste caused an increase in mean daily biogas production from 6.9 dm3 (control mixture) to 9.21dm3 (mixture M3). No differences in biogas production were found for other cases (mixtures M1, M2). A similar relationship was observed for methane content in biogas.

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Progress in the Production of Biogas from Maize Silage after Acid-Heat Pretreatment

Energies ◽

10.3390/en14238018 ◽

2021 ◽

Vol 14 (23) ◽

pp. 8018

Author(s):

Anna Nowicka ◽

Marcin Zieliński ◽

Marcin Dębowski ◽

Magda Dudek

Keyword(s):

Hydrochloric Acid ◽

Microwave Heating ◽

Microwave Radiation ◽

Anaerobic Degradation ◽

Fermentation Process ◽

Plant Biomass ◽

Biogas Production ◽

Conventional Heating ◽

Maize Silage ◽

Methane Fermentation

One of the most effective technologies involving the use of lignocellulosic biomass is the production of biofuels, including methane-rich biogas. In order to increase the amount of gas produced, it is necessary to optimize the fermentation process, for example, by substrate pretreatment. The present study aimed to analyze the coupled effects of microwave radiation and the following acids: phosphoric(V) acid (H3PO4), hydrochloric acid (HCl), and sulfuric(VI) acid (H2SO4), on the destruction of a lignocellulosic complex of maize silage biomass and its susceptibility to anaerobic degradation in the methane fermentation process. The study compared the effects of plant biomass (maize silage) disintegration using microwave and conventional heating; the criterion differentiating experimental variants was the dose of acid used, i.e., 10% H3PO4, 10% HCl, and 10% H2SO4 in doses of 0.02, 0.05, 0.10, 0.20, and 0.40 g/gTS. Microwave heating caused a higher biogas production in the case of all acids tested (HCl, H2SO4, H3PO4). The highest biogas volume, exceeding 1800 L/kgVS, was produced in the variant with HCl used at a dose of 0.4 g/gTS.

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Study on the Sequential Combination of Bioethanol and Biogas Production from Corn Straw

Molecules ◽

10.3390/molecules24244558 ◽

2019 ◽

Vol 24 (24) ◽

pp. 4558 ◽

Cited By ~ 2

Author(s):

Katarzyna Kotarska ◽

Wojciech Dziemianowicz ◽

Anna Świerczyńska

Keyword(s):

Fermentation Process ◽

Agricultural Sector ◽

Simultaneous Saccharification And Fermentation ◽

Biogas Production ◽

Raw Material ◽

Corn Straw ◽

Lignocellulosic Substrate ◽

Methane Fermentation ◽

Sequential Combination ◽

Simultaneous Saccharification

The objective of this study was to obtain two types of fuels, i.e., bioethanol and biogas, in a sequential combination of biochemical processes from lignocellulosic biomass (corn straw). Waste from the agricultural sector containing lignocellulose structures was used to obtain bioethanol, while the post-fermentation (cellulose stillage) residue obtained from ethanol fermentation was a raw material for the production of high-power biogas in the methane fermentation process. The studies on obtaining ethanol from lignocellulosic substrate were based on the simultaneous saccharification and fermentation (SSF) method, which is a simultaneous hydrolysis of enzymatic cellulose and fermentation of the obtained sugars. Saccharomyces cerevisiae (D-2) in the form of yeast cream was used for bioethanol production. The yeast strain D-2 originated from the collection of the Institute of Agricultural and Food Biotechnology. Volatile compounds identified in the distillates were measured using gas chromatography with flame ionization detector (GC-FID). CH4 and CO2 contained in the biogas were analyzed using a gas chromatograph in isothermal conditions, equipped with thermal conductivity detector (katharometer) with incandescent fiber. Our results show that simultaneous saccharification and fermentation enables production of bioethanol from agricultural residues with management of cellulose stillage in the methane fermentation process.

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A modified sliding mode control of a nonlinear methane fermentation process

E3S Web of Conferences ◽

10.1051/e3sconf/202016705007 ◽

2020 ◽

Vol 167 ◽

pp. 05007

Author(s):

Plamena Zlateva

Keyword(s):

Sliding Mode Control ◽

Fermentation Process ◽

Sliding Mode ◽

Biogas Production ◽

Nonlinear Differential Equations ◽

Control Input ◽

Methane Fermentation ◽

Mode Control ◽

Output Stabilization ◽

Binary Control

A continuous methane fermentation process for biogas production is considered. This biogas production process is described by a system of two nonlinear differential equations and one nonlinear algebraic equation. The paper purpose is to propose an approach for designing a modified sliding mode control (so-called binary control) of a nonlinear methane fermentation process. The control design is carried out with direct use of nonlinear model and on-line measurement for two variables only (the concentration of the organic pollutants and biogas production rate). The model of the sliding mode control is developed with respect to an auxiliary input variable in order to obtain the smooth signal of the dilution rate, which is need in the fermentation processes. The state variables, external disturbance, process output and control input are varied in the known intervals. The asymptotic output stabilization problem is solved. The good system robustness with the designed modified sliding mode control (the binary control) about various disturbances is proved through simulation investigations in MATLAB using Simulink.

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Nitrogen fertilization level and cutting affected lignocellulosic crops properties important for biogas production

BioResources ◽

10.15376/biores.12.4.8565-8580 ◽

2017 ◽

Vol 12 (4) ◽

pp. 8565-8580 ◽

Cited By ~ 1

Author(s):

Marta Oleszek ◽

Mariusz Matyka

Keyword(s):

Nitrogen Fertilization ◽

Biogas Production ◽

Lignin Content ◽

Reed Canary Grass ◽

Methane Fermentation ◽

Perennial Crops ◽

Cutting Frequency ◽

Biogas Plants ◽

Canary Grass ◽

Fertilization Level

The influence of the nitrogen fertilization level was investigated relative to the chemical composition of lignocellulosic energy crops and their usefulness as a substrate for the purpose of biogas production. In the case of perennial crops, such as Virginia mallow (VM) and reed canary grass (RCG), the impacts of individual swath and cutting frequency were examined. The results showed that raised nitrogen fertilization improved the biomass quality. This was important for biogas production, primarily through decreased lignin content, and for an increased ratio of structural carbohydrates to lignin. It is believed that this tendency may facilitate the digestion of the tested substrate and increase the methane fermentation efficiency. Likewise, the swath of perennial crops differed significantly in terms of the analyzed properties, which also may have been reflected in the suitability of biomass as a feedstock for biogas plants.

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ANALYSIS OF BIOGAS PLANTS OPERATING MODES AND OPTIMAL MODE SELECTION

ASJ. ◽

10.31618/asj.2707-9864.2020.1.37.8 ◽

2020 ◽

Vol 1 (37) ◽

pp. 41-46

Author(s):

O.M. Salamov ◽

F.A. Salmanova ◽

F.F. Aliyev

Keyword(s):

Comparative Analysis ◽

Fermentation Process ◽

Organic Waste ◽

Anaerobic Fermentation ◽

Biogas Production ◽

Mode Selection ◽

Animal Origin ◽

Operating Modes ◽

Biogas Plants ◽

Optimal Mode

The present study is dedicated to a comparative analysis of operating modes of biogas plants (BGP), in which the biogas production process from anaerobic fermentation by bacteria obtained from plant and animal origin biomass (BM) and organic waste (OW). The stages of the anaerobic fermentation process and the mechanisms of their realization are described. An optimal mode has been shown for a specific case.

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Evaluation of the Quality of Wood Pellets Available on the Market

E3S Web of Conferences ◽

10.1051/e3sconf/202017101015 ◽

2020 ◽

Vol 171 ◽

pp. 01015

Author(s):

Joanna Szyszlak-Bargłowicz ◽

Grzegorz Zając ◽

Małgorzata Hawrot-Paw ◽

Adam Koniuszy

Keyword(s):

Organic Matter ◽

Fermentation Process ◽

Biogas Production ◽

Calorific Value ◽

Wood Pellets ◽

Production Potential ◽

Methane Fermentation ◽

Different Types ◽

Biomethane Production

The purpose of the research was to assess the quality of wood pellets available on the market. This assessment was made on the basis of the technical analysis and elemental composition: C, H, N, S. 14 different types of wood pellets available on the market were tested, each of them came from a different producer. In addition, an attempt was made to assess the content of organic matter in the tested pellets on the basis of methane fermentation. The innovation in the presented work is the use of biomethane production potential assessment for pellet fuel, which until now has been practised only in the case of substrates for biogas production. The parameters characterizing the tested pellets in energy terms did not differ significantly. The high calorific value and low ash and sulfur content indicated that the output biomass was of good quality. The differences in the production potential of biomethane of the tested pellets do not allow to state unequivocally that methane fermentation can be used to assess the quality of pellets and their contents of organic matter. However, the large BMP differences obtained for individual pellets suggest that some pellets may contain impurities inhibiting the methane fermentation process.

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Potential of Palm Oil Empty Fruit Bunch as Biogas Substrate

ICONIET PROCEEDING ◽

10.33555/iconiet.v2i1.11 ◽

2019 ◽

Vol 2 (1) ◽

pp. 59-64

Author(s):

Vincentius Vincentius ◽

Evita H. Legowo ◽

Irvan S. Kartawiria

Keyword(s):

Palm Oil ◽

Fermentation Process ◽

Biogas Production ◽

Wastewater Sludge ◽

Empty Fruit Bunch ◽

Alternative Source ◽

The Earth ◽

The One ◽

Wet Fermentation ◽

Water Ratio

Natural gas is a source of energy that comes from the earth which is depleting every day, an alternative source of energy is needed and one of the sources comes from biogas. There is an abundance of empty fruit bunch (EFB) that comes from palm oil plantation that can become a substrate for biogas production. A methodology of fermentation based on Verein Deutscher Ingenieure was used to utilize EFB as a substrate to produce biogas using biogas sludge and wastewater sludge as inoculum in wet fermentation process under mesophilic condition. Another optimization was done by adding a different water ratio to the inoculum mixture. In 20 days, an average of 6gr from 150gr of total EFB used in each sample was consumed by the microbes. The best result from 20 days of experiment with both biogas sludge and wastewater sludge as inoculum were the one added with 150gr of water that produced 2910ml and 2185ml of gas respectively. The highest CH 4 produced achieved from biogas sludge and wastewater sludge with an addition of 150gr of water to the inoculum were 27% and 22% CH 4 respectively. This shows that biogas sludge is better in term of volume of gas that is produced and CH percentage.

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