Optimization of Operational Parameters in Biogas Plants using the Anaerobic Digestion Model Number 1 (ADM1)

The biogas production technology has improved over the last years for the aim of reducing the costs of the process, increasing the biogas yields, and minimizing the greenhouse gas emissions. To obtain a stable and efficient biogas production, there are several design considerations and operational parameters to be taken into account. Besides, adapting the process to unanticipated conditions can be achieved by adequate monitoring of various operational parameters. This paper reviews the research that has been conducted over the last years. This review paper summarizes the developments in biogas design and operation, while highlighting the main factors that affect the efficiency of the anaerobic digestion process. The study’s outcomes revealed that the optimum operational values of the main parameters may vary from one biogas plant to another. Additionally, the negative conditions that should be avoided while operating a biogas plant were identified.

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Analysis of the composition and formation of biogas produced during the processing of biological waste by anaerobic digestion technologies

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201058050171 ◽

2010 ◽

Vol 58 (5) ◽

pp. 171-178 ◽

Cited By ~ 2

Author(s):

Lubomír Hnilica ◽

Jiří Fryč ◽

Bořivoj Groda

Keyword(s):

Anaerobic Digestion ◽

Anaerobic Fermentation ◽

Biogas Production ◽

Raw Materials ◽

Energy Crops ◽

Operational Parameters ◽

Operation System ◽

Data Set ◽

Sufficient Energy ◽

Biogas Plants

This work compares the operating system of anaerobic fermentation of agricultural biogas plants with realization using biowaste. It deals with the operation system of anaerobic fermentation of agricultural biogas plants and implement an appropriate system to enable the use of biowaste. Based on the comparison of technological solutions and operational parameters of specific sites has been designed to allow the system biowaste were made a practical experiment to verify the assumption of increased biogas production. In experiments used substrates, which are industrially produced from the available bio-wastes, treated and then provide to operator of biogas plants. The work was carried out practical measurements to verify the production of biogas from different substrates. Utilize of nominal electric power using biowaste amounted up to 97.66%. Processing of such modified substrates in anaerobic digestion technology can greatly affect the amount of energy crops. Benefit of waste is governed primarily by such projects, where is the problem of ensuring sufficient energy crops. The proposed composition of raw materials also allows the implementation of the existing operation of anaerobic digestion. Operational data on real operations demonstrate the real possibility of further development of the area and secondly the use of biogas plants as well as in the preparation of suitably prepared substrates for the operators. The entire data set underwent a complete statistical analysis. Differences between variants were statistically significant.

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A Review of the Role of Critical Parameters in the Design and Operation of Biogas Production Plants

Applied Sciences ◽

10.3390/app9091915 ◽

2019 ◽

Vol 9 (9) ◽

pp. 1915 ◽

Cited By ~ 35

Author(s):

Shiplu Sarker ◽

Jacob J. Lamb ◽

Dag R. Hjelme ◽

Kristian M. Lien

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Real Life ◽

Process Condition ◽

Critical Parameters ◽

Organic Loading Rate ◽

Operational Parameters ◽

Biogas Yield ◽

Yield And Quality ◽

Biogas Plants

Many operating parameters, individually or together, may influence the performance of anaerobic digestion towards biogas or digestate yield and quality maximization. The most preferred method of optimizing an anaerobic digestion plant often relies on how carefully the crucial parameters, such as pH, temperature, organic loading rate, hydraulic retention time, and pressure, are chosen. There is a large amount of literature available on optimization of anaerobic digestion; however, given the continued development and implementation of innovative technologies, together with the introduction of increasingly complex systems, it is necessary to update present knowledge on process parameters and their role on operational ranges and flexibilities in real-life anaerobic digestion system. Accordingly, the present review discusses the importance of the selection of operational parameters in existing technologies and their impact on biogas yield. Notably, the four broad areas of feedstock utilization (substrate, inoculum, codigestion and pretreatment), process condition (pH, temperature, pressure, and reactor design), reactor control (HRT and OLR) and inhibition (Ammonia and VFAs) are covered in this review. In addition, particular emphasis is placed on the most recent innovations that have been or may be implemented in current or future biogas plants.

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Critical Issues and Opportunities for Producing Biomethane in Italy

Energies ◽

10.3390/en14092431 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2431

Author(s):

Roberto Murano ◽

Natascia Maisano ◽

Roberta Selvaggi ◽

Gioacchino Pappalardo ◽

Biagio Pecorino

Keyword(s):

Anaerobic Digestion ◽

Case Studies ◽

Regulatory Framework ◽

Biofuel Production ◽

Political Incentives ◽

Critical Issues ◽

Biogas Plants ◽

High Level ◽

By Products ◽

Lack Of Knowledge

Nowadays, most Italian biogas produces electricity even though recent political incentives are promoting biomethane from biogas by “upgrading” it. The aim of this paper is to focus on the regulatory framework for producing biomethane from new or already-existent anaerobic digestion plants. The complexity and lack of knowledge of the regulations on biofuel production and of anaerobic digested biomethane from waste and by-products create difficulties of both interpretation and application. Consequently, the aim of this paper is to analyze the regulations for producing biomethane, underline the critical issues and opportunities, and evaluate whether an electrical plant built in the last 10 years in Italy can really be converted to a biomethane plant, thereby lengthening its lifespan. Three case studies were considered to look more closely into applying Italian biomethane incentives and to simulate the types of incentivization in agriculture with examples based on certain fuel types typical of a standard biomethane plant of 500 standard cubic meter per hour. All the considered cases put in evidence that biomethane is a further opportunity for development with a high level of efficiency for all biogas producers, especially for many biogas plants whose incentivization period is about to finish.

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Application of Various Machine Learning Models for Process Stability of Bio-Electrochemical Anaerobic Digestion

Processes ◽

10.3390/pr10010158 ◽

2022 ◽

Vol 10 (1) ◽

pp. 158

Author(s):

Ain Cheon ◽

Jwakyung Sung ◽

Hangbae Jun ◽

Heewon Jang ◽

Minji Kim ◽

...

Keyword(s):

Machine Learning ◽

Anaerobic Digestion ◽

Prediction Accuracy ◽

Input Data ◽

Process Stability ◽

Operational Parameters ◽

Monitoring Parameter ◽

Efficient Prediction ◽

Single Input ◽

Machine Learning Models

The application of a machine learning (ML) model to bio-electrochemical anaerobic digestion (BEAD) is a future-oriented approach for improving process stability by predicting performances that have nonlinear relationships with various operational parameters. Five ML models, which included tree-, regression-, and neural network-based algorithms, were applied to predict the methane yield in BEAD reactor. The results showed that various 1-step ahead ML models, which utilized prior data of BEAD performances, could enhance prediction accuracy. In addition, 1-step ahead with retraining algorithm could improve prediction accuracy by 37.3% compared with the conventional multi-step ahead algorithm. The improvement was particularly noteworthy in tree- and regression-based ML models. Moreover, 1-step ahead with retraining algorithm showed high potential of achieving efficient prediction using pH as a single input data, which is plausibly an easier monitoring parameter compared with the other parameters required in bioprocess models.

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Pretreatment of Animal Manure Biomass to Improve Biogas Production: A Review

Energies ◽

10.3390/en13143573 ◽

2020 ◽

Vol 13 (14) ◽

pp. 3573 ◽

Cited By ~ 3

Author(s):

Meneses-Quelal Orlando ◽

Velázquez-Martí Borja

Keyword(s):

Anaerobic Digestion ◽

Methane Production ◽

Biogas Production ◽

Poultry Manure ◽

Animal Manure ◽

Methane Yield ◽

Operational Parameters ◽

Advantages And Disadvantages ◽

Physical Chemical ◽

Chemical Pretreatments

The objective of this research is to present a review of the current technologies and pretreatments used in the fermentation of cow, pig and poultry manure. Pretreatment techniques were classified into physical, chemical, physicochemical, and biological groups. Various aspects of these different pretreatment approaches are discussed in this review. The advantages and disadvantages of its applicability are highlighted since the effects of pretreatments are complex and generally depend on the characteristics of the animal manure and the operational parameters. Biological pretreatments were shown to improve methane production from animal manure by 74%, chemical pretreatments by 45%, heat pretreatments by 41% and physical pretreatments by 30%. In general, pretreatments improve anaerobic digestion of the lignocellulosic content of animal manure and, therefore, increase methane yield.

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Dry anaerobic digestion of organic waste: A review of operational parameters and their impact on process performance

Bioresource Technology ◽

10.1016/j.biortech.2019.122681 ◽

2020 ◽

Vol 299 ◽

pp. 122681 ◽

Cited By ~ 13

Author(s):

Ildefonso Rocamora ◽

Stuart T. Wagland ◽

Raffaella Villa ◽

Edmon W. Simpson ◽

Oliver Fernández ◽

...

Keyword(s):

Anaerobic Digestion ◽

Organic Waste ◽

Process Performance ◽

Operational Parameters ◽

Dry Anaerobic Digestion

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Elevated biogas production from the anaerobic co-digestion of farmhouse waste: Insight into the process performance and kinetics

Waste Management & Research ◽

10.1177/0734242x19873383 ◽

2019 ◽

Vol 37 (12) ◽

pp. 1240-1249 ◽

Cited By ~ 13

Author(s):

Spyridon Achinas ◽

Gerrit Jan Willem Euverink

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Ternary Mixtures ◽

Batch Reactors ◽

Process Performance ◽

Mixing Ratios ◽

Batch Tests ◽

Biogas Plants ◽

The Impact ◽

Insight Into

The biodegradable portion of solid waste generated in farmhouses can be treated for energy recovery with small portable biogas plants. This action can be done across the Netherlands and all around the planet. This study aims to appraise the performance of anaerobic digestion of different wastes (cow manure, food waste and garden waste) obtained from a regional farmhouse. Batch reactors were established under mesophilic conditions in order to investigate the impact of ternary mixtures on the anaerobic digestion process performance. Different mixing ratios were set in the batch tests. The upshots from the experiments connoted that ternary digestion with cow manure:food waste:garden waste mixing ratio of 40:50:10 yielded higher biogas amount. The kinetics’ results showed quite good congruence with the experimental study. The results from the kinetic analysis appeared to be in line with the experimental one.

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