Electrochemical Nutrient Recovery Enables Ammonia Toxicity Control and Biogas Desulfurization in Anaerobic Digestion

2015 ◽  
Vol 49 (2) ◽  
pp. 948-955 ◽  
Author(s):  
Joachim Desloover ◽  
Jo De Vrieze ◽  
Maarten Van de Vijver ◽  
Jacky Mortelmans ◽  
René Rozendal ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Ammonia Toxicity ◽  
Nutrient Recovery

scholarly journals Anaerobic digestion of lipid-extracted Auxenochlorella protothecoides biomass for methane generation and nutrient recovery

2015 ◽  
Vol 183 ◽  
pp. 229-239 ◽  
Author(s):  
Pavlo Bohutskyi ◽  
Ben Ketter ◽  
Steven Chow ◽  
Kameron J. Adams ◽  
Michael J. Betenbaugh ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Nutrient Recovery ◽  
Methane Generation ◽  
Auxenochlorella Protothecoides

Application of urea dosing for alkalinity supply during anaerobic digestion of vinasse

2012 ◽  
Vol 66 (11) ◽  
pp. 2453-2460 ◽  
Author(s):  
M. A. Boncz ◽  
E. L. Formagini ◽  
L. da S. Santos ◽  
R. D. Marques ◽  
P. L. Paulo
Keyword(s):  
Anaerobic Digestion ◽  
Power Supply ◽  
Treatment Process ◽  
Ph Regulation ◽  
Anaerobic Treatment ◽  
Ammonia Toxicity ◽  
Hydroelectric Power ◽  
Anaerobic Conditions ◽  
Successful Operation ◽  
Alternative Source

Pushed by demand for renewable energy, the ethanol industry in Brazil is expanding. However, production of 1 m3 of ethanol generates around 13 m3 of liquid residues (vinasse), so this expansion results in an increasing need for a more adequate destination of these residues. Nowadays the vinasse is dispersed on the sugar cane fields in the practice of fertirrigation, but anaerobic digestion of this residue may be a better solution, additionally offering an alternative source of energy, able to complement hydroelectric power supply in the dry season. However, when trying to digest vinasse at reduced hydraulic retention times, complications arise from its strong tendency toward acidification, upsetting the fragile balance of transformations normally occurring under anaerobic conditions. For successful operation of an anaerobic treatment process with acceptable hydraulic residence times, increasing alkalinity levels inside the reactor is neces­sary. In the present work we show that pH regulation by means of urea dosing, in spite of the risk posed by ammonia toxicity towards methanogenic biomass, can be a viable alternative to avoid vinasse acidification. The ammonia formed in urea conversion remains in solution, rather than escaping to the biogas, and so its use as fertiliser can offset its cost of application in the process.

Anaerobic digestion of lipid-extracted microalgae: Enhancing nutrient recovery towards a closed loop recycling

2017 ◽  
Vol 121 ◽  
pp. 139-146 ◽  
Author(s):  
Eleonora Sforza ◽  
Elena Barbera ◽  
Francesca Girotto ◽  
Raffaello Cossu ◽  
Alberto Bertucco
Keyword(s):  
Anaerobic Digestion ◽  
Closed Loop ◽  
Nutrient Recovery

scholarly journals Nutrient recovery technologies for anaerobic digestion systems: An overview

2016 ◽  
Vol 29 (1) ◽  
pp. 7-26 ◽  
Author(s):  
Maycoll Stiven Romero Güiza ◽  
◽  
Joan Mata Alvarez ◽  
Josep María Chimenos Rivera ◽  
Sergi Astals Garcia ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Nutrient Recovery

Anaerobic digestion and nutrient recovery

2022 ◽  
pp. 239-281
Author(s):  
Edgar Martín-Hernández ◽  
Mariano Martín
Keyword(s):  
Anaerobic Digestion ◽  
Nutrient Recovery

Zeolite and swine inoculum effect on poultry manure biomethanation

2013 ◽  
Vol 27 (2) ◽  
pp. 169-173 ◽  
Author(s):  
P.G. Kougias ◽  
I.A. Fotidis ◽  
I.D. Zaganas ◽  
T.A. Kotsopoulos ◽  
G.G. Martzopoulos
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Natural Zeolite ◽  
Swine Manure ◽  
Poultry Manure ◽  
Ammonia Toxicity ◽  
Poultry Waste ◽  
Anaerobic Digestion Process ◽  
Digestion Process ◽  
Inoculum Effect

Abstract Poultry manure is an ammonia-rich substrate that inhibits methanogenesis, causing severe problems to the anaerobic digestion process. In this study, the effect of different natural zeolite concentrations on the mesophilic anaerobic digestion of poultry waste inoculated with well-digested swine manure was investigated. A significant increase in methane production was observed in treatments where zeolite was added, compared to the treatment without zeolite.Methane production in the treatment with 10 g dm-3 of natural zeolite was found to be 109.75% higher compared to the treatment without zeolite addition. The results appear to be influenced by the addition of zeolite, which reduces ammonia toxicity in anaerobic digestion and by the ammonia-tolerant swine inoculum.

Mathematical models and bacterial communities for ammonia toxicity in mesophilic anaerobes not acclimated to high concentrations of ammonia

2016 ◽  
Vol 74 (4) ◽  
pp. 935-942 ◽  
Author(s):  
Seyong Park ◽  
Fenghao Cui ◽  
Kyung Mo ◽  
Moonil Kim
Keyword(s):  
Anaerobic Digestion ◽  
Bacterial Communities ◽  
Ammonia Nitrogen ◽  
Ammonia Toxicity ◽  
Methanogenic Activity ◽  
Total Ammonia Nitrogen ◽  
Ph Values ◽  
Total Ammonia ◽  
High Concentrations ◽  
Toxicity Effects

In this study, we evaluated ammonia toxicity in mesophilic anaerobic digestion at various pH values and total ammonia nitrogen (TAN) concentrations. We performed anaerobic toxicity assays (ATAs) to evaluate the toxicity effects of TAN and pH on mesophilic anaerobic digestion. Modeling based on the results of the ATAs indicated that the specific methanogenic activity (SMA) decreased by 30% at a TAN concentration higher than 3.0 g/L compared to a TAN concentration of 0 g/L. In addition, the highest SMA for a given TAN level (0.5–10.0 g/L) was observed at a pH of around 7.6. The results of bacterial community analyses showed that the diversity and richness of microorganisms with increasing TAN concentration were decreased. Chloroflexi and Synergistetes were the dominant phyla at TAN concentrations less than 3.0 g/L, and Firmicutes was the dominant phylum at TAN concentrations higher than 3.0 g/L, implying that the ammonia toxicity concentration may influence the kind of dominant species. In conclusion, to start a stable mesophilic anaerobic digestion concerning ammonia toxicity, a TAN concentration less than 3.0 g/L is preferable.

Sign in / Sign up

Export Citation Format

Share Document