Enhanced methane production and organic matter removal from tequila vinasses by anaerobic digestion assisted via bioelectrochemical power-to-gas

2021 ◽  
Vol 320 ◽  
pp. 124344
Author(s):  
Edson Baltazar Estrada-Arriaga ◽  
Ma. Guadalupe Reynoso-Deloya ◽  
Rosa Angélica Guillén-Garcés ◽  
Axel Falcón-Rojas ◽  
Liliana García-Sánchez
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Methane Production ◽  
Organic Matter Removal ◽  
Power To Gas ◽  
Tequila Vinasses

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.

Anaerobic Digestion of Solid Wastes Needs Research to Face an Increasing Industrial Success

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Pierre Buffiere ◽  
Liliana Delgadillo Mirquez ◽  
Jean Philippe Steyer ◽  
Nicolas Bernet ◽  
Jean Philippe Delgenes
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Methane Production ◽  
Biochemical Parameters ◽  
Energy Production ◽  
Solid Wastes ◽  
High Complexity ◽  
Intrinsic Kinetics ◽  
Anaerobic Biodegradability ◽  
Kinetics Of

Anaerobic digestion of solid wastes is an emerging solution for both waste management and energy production. The high complexity of the process is mostly attributed to the absence of descriptors for the design and the prediction of such a process. This paper presents an approach for the description of organic matter based on several biochemical parameters, established on 22 different organic wastes. The lignocellulosic content is the most important parameter for the prediction of anaerobic biodegradability and methane production; in addition, the knowledge of the carbohydrate, lipid and protein contents is also crucial and makes possible a prediction of the intrinsic kinetics of the reaction.

Microaerophilic treatment enhanced organic matter removal and methane production rates during swine wastewater treatment: A long-term engineering evaluation

2021 ◽  
Vol 180 ◽  
pp. 691-699
Author(s):  
Maurício Guimarães de Oliveira ◽  
José Marcos Marques Mourão ◽  
Ana Katherinne Marques de Oliveira ◽  
André Bezerra dos Santos ◽  
Erlon Lopes Pereira
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Methane Production ◽  
Swine Wastewater ◽  
Production Rates ◽  
Organic Matter Removal

Hydrogen and Methane Production, Energy Recovery, and Organic Matter Removal from Effluents in a Two-Stage Fermentative Process

2012 ◽  
Vol 168 (3) ◽  
pp. 651-671 ◽  
Author(s):  
Guilherme Peixoto ◽  
Jorge Luis Rodrigues Pantoja-Filho ◽  
José Augusto Bolzan Agnelli ◽  
Marlei Barboza ◽  
Marcelo Zaiat
Keyword(s):  
Organic Matter ◽  
Methane Production ◽  
Energy Recovery ◽  
Two Stage ◽  
Organic Matter Removal ◽  
Fermentative Process

scholarly journals The synergy of combined free nitrous acid and Fenton technology in enhancing anaerobic digestion of real sewage waste activated sludge

2019 ◽  
Author(s):  
Razieh Karimi ◽  
Seyed Mostafa Hallaji
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Methane Production ◽  
Nitrous Acid ◽  
Waste Activated Sludge ◽  
Free Nitrous Acid ◽  
Digestion Process ◽  
Treatment Technologies ◽  
Pre Treatment

Abstract Background Recently, free nitrous acid (FNA) pre-treatment of sewage waste activated sludge has been introduced as an economically attractive and environmentally friendly technique for enhancing methane production from the anaerobic digestion process. Fenton pre-treatment of sewage sludge, as an advanced oxidation process, has also been introduced as a powerful technique for methane improvement in a couple of studies. This study, for the first time, investigates the synergy of combined FNA and Fenton pre-treatment technologies in enhancing the methane production from the anaerobic digestion process and reducing waste sludge to be disposed of. Actual secondary waste activated sludge in laboratory-scale batch reactors was used to assess the synergistic effect of the pre-treatments. The mechanisms behind the methane enhancement were also put into perspective by measuring different microbial enzymes activity and solubilisation of organic matter. Result This study revealed that the combined pre-treatments release organic matter into the soluble phase significantly more than the bioreactors pre-treated with individual FNA and Fenton. For understanding the influence of pre-treatments on solubilisation of organic matter, soluble protein, soluble polysaccharide and soluble chemical oxygen demand (SCOD) were measured before and after the treatments and it was shown that they respectively increased by 973%, 33% and 353% after the treatments. Protease and cellulose activity, as the key constituents of the microbial community presenting in activated sludge, decreased considerably within the combined pre-treatments (42% and 32% respectively) and methane production enhanced by 43-69%. Furthermore, total solids and volatile solids destruction improved by 26% and 24% at the end of anaerobic digestion, which can reduce transport costs of sludge and improve the quality of sludge for application in farms and forests. Conclusions The results obtained from the experiments corroborate the synergic effect of the combined FNA and Fenton pre-treatment technologies in degrading the organic and microbial constituents in waste activated sludge, which improved methane production accordingly. This is of paramount importance because the total costs of wastewater treatment plants operation and greenhouse gas emission from sludge treatment and disposal processes would reduce considerably, which pave the way for the implementation of these technologies.

scholarly journals Organic Waste Conversion Via Continuous Anaerobic Co-Digestion of Oil Palm Empty Fruit Bunches and Cow Manure: Evaluation of Feeding Regime on Methane Production

2021 ◽  
Vol 24 (1) ◽  
pp. 8-13
Author(s):  
Darwin ◽  
Atmadian Pratama ◽  
Mardhotillah
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Oil Palm ◽  
Methane Production ◽  
Organic Waste ◽  
Cow Manure ◽  
Research Focus ◽  
Significant Drop ◽  
Empty Fruit Bunches ◽  
Waste Conversion

AbstractAnaerobic co-digestion of oil palm empty fruit bunches with cow manure was studied. The research focus was on the evaluation of feeding different solid concentrations of the substrate in the on-going process of anaerobic digestion. The solid concentrations ranged from 0.5 to 12% TS. Results of the study showed that the maximum methane production could be reached with the reactor digesting substrates with 4 to 8% TS, in which the methane produced was from 1300 to 1400 mL per day. A significant drop of pH from 7.02 to 5.97 occurred when the reactor was digesting substrates with 10 and 12% TS. Acidic condition caused by organic matter overloads lowered the efficiency of organic conversion represented in the low removal of COD, which was only 22.4%. This finding is highly significant for the waste management industries in terms of dealing with the digester upset due to the digestion of large amount of organic wastes.

scholarly journals The anaerobic digestion microbiome: a collection of 1600 metagenome-assembled genomes shows high species diversity related to methane production

2019 ◽  
Author(s):  
Stefano Campanaro ◽  
Laura Treu ◽  
Luis M Rodriguez-R ◽  
Adam Kovalovszki ◽  
Ryan M Ziels ◽  
...  
Keyword(s):  
Organic Matter ◽  
Anaerobic Digestion ◽  
Methane Production ◽  
Metabolic Reconstruction ◽  
Waste Biomass ◽  
Dynamic Composition ◽  
Extensive Evaluation ◽  
Wide Range ◽  
Biogas Reactors ◽  
High Flexibility

AbstractBackgroundMicroorganisms in biogas reactors are essential for degradation of organic matter and methane production through anaerobic digestion process. However, a comprehensive genome-centric comparison, including relevant metadata for each sample, is still needed to identify the globally distributed biogas community members and serve as a reliable repository.ResultsHere, 134 publicly available datasets derived from different biogas reactors were used to recover 1,635 metagenome-assembled genomes (MAGs) representing different bacterial and archaeal species. All genomes were estimated to be >50% complete and nearly half were ≥90% complete with ≤5% contamination. In most samples, specialized microbial communities were established, while only a few taxa were widespread among the different reactor systems. Metabolic reconstruction of the MAGs enabled the prediction of functional traits related to biomass degradation and methane production from waste biomass. An extensive evaluation of the replication index provided an estimation of the growth rate for microbes involved in different steps of the food chain. The recovery of many MAGs belonging to Candidate Phyla Radiation and other underexplored taxa suggests their specific involvement in the anaerobic degradation of organic matter.ConclusionsThe outcome of this study highlights a high flexibility of the biogas microbiome. The dynamic composition and adaptability to the environmental conditions, including temperatures and a wide range of substrates, were demonstrated. Our findings enhance the mechanistic understanding of anaerobic digestion microbiome and substantially extend the existing repository of genomes. The established database represents a relevant resource for future studies related to this engineered ecosystem.

Process optimization and effect of thermal, alkaline, H2O2 Oxidation and combination pre-treatment of sewage sludge on solubilisation and anaerobic digestion

2020 ◽  
Author(s):  
Salar Siami ◽  
Behnoush Aminzadeh ◽  
Razieh Karimi ◽  
Seyed Mostafa Hallaji
Keyword(s):  
Hydrogen Peroxide ◽  
Response Surface Methodology ◽  
Organic Matter ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Thermal Energy ◽  
Methane Production ◽  
Quadratic Model ◽  
Waste Activated Sludge ◽  
Pre Treatment

Abstract Background This study investigated the feasibility of enhancing anaerobic digestion of sewage sludge with triple, dual, and individual pre-treatment of waste activated sludge with heat, alkalinity, and hydrogen peroxide. These pre-treatments disrupt sludge flocs, organisms’ cell walls, extracellular polymeric substance, and intracellular organic matter, which increase biodegradability and hydrolysis rate of organic matter. In addition, the influence of various variables on methane production was analyzed using the response surface methodology with the quadratic model. Eventually, an optimized temperature and chemical concentration for the highest methane production and lowest chemical usage is suggested.Results The highest amount of methane production was obtained from the sludge pretreated with triple pretreatment (heat (90°C), alkalinity (pH=12), and hydrogen peroxide (30 mg H2O2 /g TS)), which had better performance with 96% higher than that of the control sample with Temperature of 25°C approximately and alkalinity of pH=8. Response surface methodology with the quadratic model was also used for analyzing the influence of temperature, pH, and hydrogen peroxide concentration on anaerobic digestion efficiency. It was revealed that the optimized temperature, pH, and hydrogen peroxide concentration for maximizing methane production and solubilisation of organic matter and minimizing thermal energy and chemical additives of the pre-treatments are 83.2°C, pH=10.6 and 34.8 mg H2O2 /g TS, respectively, has the desirability of 0.67.Conclusion This study reveals that triple pre-treatment of waste activated sludge performs better than dual and individual pre-treatment, Respectively. The enhanced methane production can be used as an important renewable energy resource in wastewater treatment plants for producing electrical and thermal energy. Furthermore, exploiting a higher amount of methane in the anaerobic digestion stage decreases methane emission to the atmosphere in dewatering and landfilling stages and enhances the quality of digested sludge, bringing about environmentally friendly and economically attractive sewage sludge treatment process.

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