scholarly journals The Potentiality of Municipal Solid Waste to Produce Volatile Fatty Acids (VFAs)

2019 ◽  
Vol 11 (1) ◽  
pp. 133-143
Author(s):  
M. S. A. Amin ◽  
M. M. Alam ◽  
M. S. I. Mozumder
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Batch Reactor ◽  
Ammonium Nitrogen ◽  
Economic Feasibility ◽  
Efficient Production ◽  
Inhibition Effect ◽  
Potato Waste

Volatile fatty acids (VFAs) are proposed platform molecules for the production of basic chemicals and polymers from organic waste streams. A simple bio-reactor was fabricated with locally available materials to conduct this study. A lab-scale anaerobic batch reactor was fed with potato waste and banana waste as substrate to find out the potential organic waste that has maximum VFAs production capacity. Between these two wastes, banana waste was found better for VFAs production. The product spectrum remained similar at the pH range 4.0-4.5 but higher pH reduced the VFAs production. The operation of anaerobic digestion with uncontrolled pH reduced the pH 4.0 to 4.5. Therefore, it is better to run the anaerobic digestion without controlling the pH while aiming to VFAs production. A small amount nutrient (ammonium nitrogen) significantly increases the VFAs production but higher amount nutrient has an inhibition effect. However commercial surfactant has a strong inhibition effect on VFAs producing organism and hence reduced the VFAs production. The efficient production of VFA at uncontrolled pH with a small amount of ammonium nitrogen increases the economic feasibility of organic waste-based VFAs production.

Influence of hydrothermal pretreatment conditions, typology of anaerobic digestion system, and microbial profile in the production of volatile fatty acids from olive mill solid waste

2021 ◽  
Vol 9 (2) ◽  
pp. 105055
Author(s):  
Yasmim Arantes da Fonseca ◽  
Nayara Clarisse Soares Silva ◽  
Adonai Bruneli de Camargos ◽  
Silvana de Queiroz Silva ◽  
Hector Javier Luna Wandurraga ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Solid Waste ◽  
Volatile Fatty Acids ◽  
Hydrothermal Pretreatment ◽  
Microbial Profile ◽  
Olive Mill Solid Waste ◽  
Pretreatment Conditions ◽  
Olive Mill

Increasing 2 -Bio- (H2 and CH4) production from food waste by combining two-stage anaerobic digestion and electrodialysis for continuous volatile fatty acids removal

2021 ◽  
Vol 129 ◽  
pp. 20-25
Author(s):  
Gamal K. Hassan ◽  
Rhys Jon Jones ◽  
Jaime Massanet-Nicolau ◽  
Richard Dinsdale ◽  
M.M. Abo-Aly ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Food Waste ◽  
Volatile Fatty Acids ◽  
Two Stage ◽  
Ch4 Production

Use of organic waste for biohydrogen production and volatile fatty acids via dark fermentation and further processing to methane

2019 ◽  
Vol 44 (44) ◽  
pp. 24110-24125 ◽  
Author(s):  
Tobias Weide ◽  
Elmar Brügging ◽  
Christof Wetter ◽  
Antonio Ierardi ◽  
Marc Wichern
Keyword(s):  
Fatty Acids ◽  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Dark Fermentation ◽  
Biohydrogen Production

scholarly journals Control and estimation of anaerobic digestion processes using hydrogen and volatile fatty acids measurements

2018 ◽  
Vol 78 (10) ◽  
pp. 2027-2035 ◽  
Author(s):  
M. Sbarciog ◽  
G. Giovannini ◽  
R. Chamy ◽  
A. Vande Wouwer
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Hydrogen Concentration ◽  
Volatile Fatty Acids ◽  
Control Structure ◽  
Tight Control ◽  
Detailed Model ◽  
Control Scheme ◽  
Estimation And Control ◽  
And Control

Abstract The anaerobic digestion (AD) technology is widely used in the treatment of waste and wastewater. To ensure the treatment efficiency and to increase the production of biogas, which can be reused as a renewable energy source, a good understanding of the process and tight control are needed. This paper presents an estimation and control scheme, which can be successfully used in the operation of the AD process. The process is simulated by the ADM1 model, the most complex and detailed model developed so far to characterize AD. The controller and the observer, which provides estimates of the unmeasurable variables needed in the computation of the control law, are designed based on a simplified model developed in a previous work. Since it has been shown that hydrogen concentration is an accurate and fast indicator of process stability, it was chosen as controlled variable. Aside from the hydrogen concentration, the only measurement employed by the proposed control structure is the volatile fatty acids concentration. Simulation results prove the effectiveness of the proposed control structure.

scholarly journals Theoretical and Experimental Results on the Recovery of Potato Processing Residuals by Anaerobic Digestion

2019 ◽  
Vol 70 (7) ◽  
pp. 2524-2529 ◽  
Author(s):  
Andreea D. Dima ◽  
Carmen Mateescu ◽  
Oana C. Parvulescu ◽  
Eduard M. Lungulescu ◽  
Nicoleta O. Nicula
Keyword(s):  
Anaerobic Digestion ◽  
Gompertz Model ◽  
Economic Feasibility ◽  
Potato Processing ◽  
Biomethane Potential ◽  
Potato Waste ◽  
Cone Model ◽  
Treatment Technologies ◽  
Negative Environmental Impact ◽  
Modified Gompertz Model

Anaerobic digestion of organic matter with high moisture content has proven to be a suitable method for disposal of wet organic residuals with several advantages compared to other treatment technologies. This paper aimed at evaluating the theoretical and experimental biomethane potential of food processing residuals that are responsible for negative environmental impact, with exemplification for the potato processing waste. The biomethane potential is a useful parameter to assess the economic efficiency of anaerobic digestion processes as it can considerably influence the efficiency and the economic feasibility of the energy recovery technologies. Both experimental and theoretical biomethane potentials of potato waste in mesophilic anaerobic digestion as well as biodegradability of the substrate were estimated. Moreover, effects of microalgal extract addition on the digestion of potato waste were examined in an attempt to stimulate the anaerobic digestion. Cone model and a modified Gompertz model were used to predict the dynamics of biomethane production.

scholarly journals Effects of sulfonamide antibiotics on digestion performance and microbial community during swine manure anaerobic digestion

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Shaona Wang ◽  
Kang Du ◽  
Rongfang Yuan ◽  
Huilun Chen ◽  
Fei Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Dissolved Organic Matter ◽  
Methane Production ◽  
Volatile Fatty Acids ◽  
High Throughput Sequencing ◽  
Batch Reactor ◽  
Inhibition Mechanism ◽  
Sulfonamide Antibiotics ◽  
High Concentration

The effects of four types of sulfonamide antibiotics (SAs), including sulfaquinoxaline, sulfamethoxazole, sulfamethoxydiazine and sulfathiazole, on the digestion performance during anaerobic digestion process were studied using a lab-scale anaerobic sequencing batch reactor, and the changes of the community structure in the presence of SAs were investigated with the help of high throughput sequencing. The results indicated that when SAs were added, the hydrolytic acidification process was inhibited, and the accumulation of volatile fatty acids (VFAs) was induced, resulting in the suppression of methane production. However, the inhibition mechanism of different SAs was quite different. The inhibitory effect of high concentration of SAs on the hydrolysis of solid particulate matter into dissolved organic matter followed the order of sulfaquinoxaline > sulfamethoxydiazine > sulfathiazole > sulfamethoxazole. SAs have obvious inhibitory effects on acidification and methanation of dissolved organic matter, especially sulfathiazole. The richness and the community composition of the microorganism including bacteria and archaea in the digestion system were affected by SAs. Under the effect of SAs, the relative abundance of many microorganisms is negatively correlated with methane production, among which Methanobrevibacter, a kind of Archaea, had the greatest influence on methane production.

Conversion of organic waste into volatile fatty acids – The influence of process operating parameters

2018 ◽  
Vol 345 ◽  
pp. 395-403 ◽  
Author(s):  
Ewelina Jankowska ◽  
Anna Duber ◽  
Joanna Chwialkowska ◽  
Mikolaj Stodolny ◽  
Piotr Oleskowicz-Popiel
Keyword(s):  
Fatty Acids ◽  
Organic Waste ◽  
Volatile Fatty Acids ◽  
Operating Parameters
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