Anaerobic digestion of skim latex serum (SLS) for hydrogen and methane production using a two-stage process in a series of up-flow anaerobic sludge blanket (UASB) reactor

2014 ◽  
Vol 39 (33) ◽  
pp. 19343-19348 ◽  
Author(s):  
Prawit Kongjan ◽  
Rattana Jariyaboon ◽  
Sompong O-Thong
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Two Stage ◽  
Stage Process ◽  
Anaerobic Sludge Blanket

Continuous hydrogen and methane production in a two-stage cheese whey fermentation system

2011 ◽  
Vol 64 (2) ◽  
pp. 367-374 ◽  
Author(s):  
C. B. Cota-Navarro ◽  
J. Carrillo-Reyes ◽  
G. Davila-Vazquez ◽  
F. Alatriste-Mondragón ◽  
E. Razo-Flores
Keyword(s):  
Methane Production ◽  
Cheese Whey ◽  
Continuous Production ◽  
Uasb Reactor ◽  
Organic Loading Rate ◽  
Stable Operation ◽  
Operational Parameters ◽  
Two Stage ◽  
Production Of Hydrogen ◽  
Stage Process

The feasibility of integrating biological hydrogen and methane production in a two-stage process using mixed cultures and cheese whey powder (CWP) as substrate was studied. The effect of operational parameters such as hydraulic retention time (HRT) and organic loading rate (OLR) on the volumetric hydrogen (VHPR) and methane (VMPR) production rates was assessed. The highest VHPR was 28 L H2/L/d, obtained during stable operation in a CSTR at HRT and OLR of 6 h and 142 g lactose/L/d, respectively. Moreover, hydrogen (13 L/L/d) was produced even at HRT as low as 3.5 h and OLR of 163 g lactose/L/d, nonetheless, the reactor operation was not stable. Regarding methane production in an UASB reactor, the acidified effluent from the hydrogen-producing bioreactor was efficiently treated obtaining COD removals above 90% at OLR and HRT of 20 g COD/L/d and 6 h, respectively. The two-stage process for continuous production of hydrogen and methane recovered over 70% of the energy present in the substrate. This study demonstrated that hydrogen production can be efficiently coupled to methane production in a two-stage system and that CWP is an adequate substrate for energy production.

scholarly journals A VFA-based controller for anaerobic digestion of industrial winery wastewater

2018 ◽  
Vol 78 (9) ◽  
pp. 1871-1878 ◽  
Author(s):  
Gustavo Vargas-Morales ◽  
Rolando Chamy ◽  
Santiago García-Gen
Keyword(s):  
Anaerobic Digestion ◽  
Volatile Fatty Acids ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
Variable Gain ◽  
Winery Wastewater ◽  
Empirical Function ◽  
Anaerobic Sludge Blanket

Abstract A variable-gain controller for anaerobic digestion of industrial winery wastewater is presented. A control law using both volatile fatty acids (VFA) and methane production rate as controlled variables and organic loading rate (OLR) as manipulated variable is defined. The process state is quantitatively estimated by an empirical function comparing VFA measurements against a setpoint value; then, it is modified with a second empirical function that compares the methane flow rate with a maximum capacity reference, and finally it is adjusted with a third factor considering the actual hydraulic retention time. The variable-gain function determines the extent of the OLR change applied to the system. The controller was successfully validated in a 95 L upflow-anaerobic-sludge-blanket (UASB) reactor, treating industrial wine wastewater at OLR ranged between 2.0 and 39.2 g COD/L d for 120 days at mesophilic conditions. Higher performance was achieved contrasted with a conventional strategy carried out in a parallel UASB unit.

Biogas Production Using Codigestion of Organic Residues with Malt Bagasse

2021 ◽  
Vol 47 (1) ◽  
pp. 174-180
Author(s):  
Henrique Sousa do Nascimento ◽  
Geísa Vieira Vasconcelos Magalhães ◽  
José Demontier Vieira de Souza-Filho ◽  
Ronaldo Stefanutti ◽  
Ari Clecius Alves de Lima ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Organic Waste ◽  
Biogas Production ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Operational Conditions ◽  
Different Types ◽  
Anaerobic Sludge Blanket ◽  
Bagasse Waste

This study evaluated the use of two anaerobic bioreactors in the production of biogas from malt bagasse waste. Bioreactor B1 was loaded with a mixture of 600mL of anaerobic sludge, 300g of organic waste, taken from an upflow anaerobic sludge blanket (UASB) reactor, and 300g of malt bagasse residue. Bioreactor B2 was loaded with a mixture of 600g of organic waste and 600mL of anaerobic sludge taken from an UASB reactor. The anaerobic digestion processes lasted for 10 weeks and the produced methane fraction was measured in 5 occasions. Bioreactor B1 presented low methane production (7.2%) but Bioreactor B2 showed a much more signif- icant percentage, reaching up to 48.3%. The experiments were capable of reproducing largescale operational conditions, enabling increased results in biogas capturing and processing, strengthening sustainability and energy efficiency. The experiment also showed the importance of studying different types of organic waste, seeking optimization of anaerobic digestion pro- cesses.

scholarly journals Anaerobic Digestion and Biogas Production: Combine Effluent Treatment with Energy Generation in UASB Reactor as Biorefinery Annex

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Mauro Berni ◽  
Ivo Dorileo ◽  
Grazielle Nathia ◽  
Tânia Forster-Carneiro ◽  
Daniel Lachos ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Industrial Effluents ◽  
Fuel Oil ◽  
Effluent Treatment ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Industrial Plant ◽  
Anaerobic Sludge ◽  
Anaerobic Sludge Blanket

The issue of residues and industrial effluents represents an unprecedented environmental challenge in terms of recovery, storage, and treatment. This work discusses the perspectives of treating effluents through anaerobic digestion as well as reporting the experience of using an upflow anaerobic sludge blanket (UASB) reactor as biorefinery annex in a pulp and paper industrial plant to be burned in the boilers. The performance of the reactors has shown to be stable under considerable variations in load and showed a significant potential in terms of biogas production. The reactors UASB treated 3600.00 m3of effluent daily from a production of 150.00 tons. The biogas generation was 234.000 kg/year/mill, equivalent in combustible oil. The results of methane gas generated by the anaerobic system UASB (8846.00 kcal/m3) dislocate the equivalent of 650.0 kg of combustible oil (10000.00 kcal/kg) per day (or 234.000 kg/year). The production of 8846.00 Kcal/m3of energy from biogas can make a run at industrial plant for 2 hours. This substitution can save US$ 128.700 annually (or US$ 550.0 of fuel oil/tons). The companies are invested in the use of the biogas in diesel stationary motors cycle that feed the boilers with water in case of storage electricity.

scholarly journals Two-Phase Anaerobic Digestion of Municipal Organic Solid Wastes

2013 ◽  
Vol 3 (2) ◽  
pp. 210-218
Author(s):  
R. Rodríguez-Pimentel ◽  
F. Ramírez-Vives ◽  
A. De Jesús-Rojas ◽  
F. J. Martínez-Valdez ◽  
S. Rodríguez-Pérez ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Municipal Wastewater ◽  
Solid Wastes ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Total Solids ◽  
Removal Efficiencies ◽  
Two Stages

Two stages anaerobic digestion of the organic fraction of municipal solid wastes (OFMSW) is proposed using a batch anaerobic trickling bed (BATB) reactor in the first hydrolysis and acidogenesis stage. At total solids loading of 135 g/L and reaction times around 30 days, total solids (ηTS) and chemical oxygen demand (ηCOD) removal efficiencies above 46% were obtained independently of pH (between 4.1 and 6.4). Dependent on pH were methane production, four times more at pH 6.4 than at 4.8 and four times more volatile fatty acids (VFA) production at 6.4 than at 4.1 and twice than at 4.8. Leachates generated in the BATB reactor were diluted with municipal wastewater and fed to an upflow anaerobic sludge blanket (UASB) reactor at volumetric organic loading rates from 11 to 28 g/L.d where 90% COD removal efficiencies (ηCOD) and 11.4 g CODCH4./L.d were obtained. Two stages anaerobic digestion results in high rates of solids removal and methane production (0.63 kWhr/kg TS fed).

Temperature effect on UASB reactor operation for domestic wastewater treatment in temperate climate regions

2003 ◽  
Vol 48 (3) ◽  
pp. 25-30 ◽  
Author(s):  
B. Lew ◽  
M. Belavski ◽  
S. Admon ◽  
S. Tarre ◽  
M. Green
Keyword(s):  
Methane Production ◽  
Domestic Wastewater ◽  
Cod Removal ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Temperate Climate ◽  
Anaerobic Sludge ◽  
Biological Degradation ◽  
Domestic Wastewater Treatment ◽  
Anaerobic Sludge Blanket

The performance of an upflow anaerobic sludge blanket (UASB) reactor was investigated for the treatment of domestic wastewater at different operational temperatures (28, 20, 14 and 10°C) and loading rates. For each temperature studied a constant CODt removal was observed as long as the upflow velocity was lower than 0.35 m/h: 82% at 28°C, 68% at 14°C and 44% at 10°C. At 20°C the COD removal increased with the HRT, reaching similar values as at 28°C for long HRT. At upflow velocities higher than 0.35 m/h, a reduction in total COD removal was observed due to washout of influent TSS. At 28°C, a constant 200 g sludge mass was observed and COD removal was attributed to biological degradation only. At lower temperatures, COD removal resulted from degradation and solids accumulation in the reactor. The increase in reactor sludge was greater as the temperature decreased and explains the similar overall COD removal efficiency at 28°C, 20°C and 14°C. During the transition from winter to summer conditions (10°C to 28°C), methane production initially increased due to the degradation of accumulated solids. Afterwards, methane production gradually declined and an increase in COD removal was observed, indicating that the TSS accumulated during the winter was exhausted and influent degradation remained.

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