Response of methanogen populations to organic load increase during anaerobic digestion of olive mill wastewater

2006 ◽  
Vol 81 (9) ◽  
pp. 1556-1562 ◽  
Author(s):  
Aurora Rizzi ◽  
Mauro Zucchi ◽  
Sara Borin ◽  
Massimo Marzorati ◽  
Claudia Sorlini ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Olive Mill Wastewater ◽  
Organic Load ◽  
Load Increase ◽  
Olive Mill

scholarly journals Structure of Microbial Communities When Complementary Effluents Are Anaerobically Digested

2021 ◽  
Vol 11 (3) ◽  
pp. 1293
Author(s):  
Ana Eusébio ◽  
André Neves ◽  
Isabel Paula Marques
Keyword(s):  
Anaerobic Digestion ◽  
Microbial Communities ◽  
Volatile Fatty Acids ◽  
Olive Mill Wastewater ◽  
Organic Load ◽  
Rrna Gene ◽  
Bacterial Populations ◽  
Next Generation Sequencing Ngs ◽  
Generation Sequencing ◽  
Olive Mill

Olive oil and pig productions are important industries in Portugal that generate large volumes of wastewater with high organic load and toxicity, raising environmental concerns. The principal objective of this study is to energetically valorize these organic effluents—piggery effluent and olive mill wastewater—through the anaerobic digestion to the biogas/methane production, by means of the effluent complementarity concept. Several mixtures of piggery effluent were tested, with an increasing percentage of olive mill wastewater. The best performance was obtained for samples of piggery effluent alone and in admixture with 30% of OMW, which provided the same volume of biogas (0.8 L, 70% CH4), 63/75% COD removal, and 434/489 L CH4/kg SVin, respectively. The validation of the process was assessed by molecular evaluation through Next Generation Sequencing (NGS) of the 16S rRNA gene. The structure of the microbial communities for both samples, throughout the anaerobic process, was characterized by the predominance of bacterial populations belonging to the phylum Firmicutes, mainly Clostridiales, with Bacteroidetes being the subdominant populations. Archaea populations belonging to the genus Methanosarcina became predominant throughout anaerobic digestion, confirming the formation of methane mainly from acetate, in line with the greatest removal of volatile fatty acids (VFAs) in these samples.

Enhancement of the anaerobic digestion of olive mill wastewater by the removal of phenolic inhibitors

1992 ◽  
Vol 27 (4) ◽  
pp. 231-237 ◽  
Author(s):  
R. Borja ◽  
A. Martin ◽  
R. Maestro ◽  
J. Alba ◽  
J.A. Fiestas
Keyword(s):  
Anaerobic Digestion ◽  
Olive Mill Wastewater ◽  
Olive Mill

Kinetic study of anaerobic digestion of olive mill wastewater previously fermented with Aspergillus terreus

1993 ◽  
Vol 28 (6) ◽  
pp. 397-404 ◽  
Author(s):  
R. Borja ◽  
S.E. Garrido ◽  
L. Martínez ◽  
A. Ramos-Cormenzana ◽  
A. Martín
Keyword(s):  
Anaerobic Digestion ◽  
Kinetic Study ◽  
Aspergillus Terreus ◽  
Olive Mill Wastewater ◽  
Olive Mill

Performance and microbial analysis during long‐term anaerobic digestion of olive mill wastewater in a packed‐bed biofilm reactor

2019 ◽  
Vol 95 (3) ◽  
pp. 850-861 ◽  
Author(s):  
Ghizlane Enaime ◽  
Edith Nettmann ◽  
Stephan Berzio ◽  
Abdelaziz Baçaoui ◽  
Abdelrani Yaacoubi ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Packed Bed ◽  
Olive Mill Wastewater ◽  
Biofilm Reactor ◽  
Microbial Analysis ◽  
Olive Mill

Panus tigrinus efficiently removes phenols, color and organic load from olive-mill wastewater

2004 ◽  
Vol 155 (7) ◽  
pp. 596-603 ◽  
Author(s):  
Alessandro D'Annibale ◽  
Marika Ricci ◽  
Daniele Quaratino ◽  
Federico Federici ◽  
Massimiliano Fenice
Keyword(s):  
Olive Mill Wastewater ◽  
Organic Load ◽  
Panus Tigrinus ◽  
Olive Mill

scholarly journals Limiting factors for anaerobic digestion of olive mill wastewater blends under mesophilic and thermophilic conditions

2018 ◽  
Vol 49 (2) ◽  
pp. 130-137
Author(s):  
Demetrio Antonio Zema ◽  
Giovanni Zappia ◽  
Souraya Benalia ◽  
Giuseppe Zimbalatti ◽  
Enzo Perri ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Volatile Fatty Acids ◽  
Biogas Production ◽  
Olive Mill Wastewater ◽  
Limiting Factors ◽  
Citrus Peel ◽  
Thermophilic Conditions ◽  
High Concentrations ◽  
Olive Mill

Experimental trials of anaerobic digestion of olive mill wastewater (OMW) blended with other agro-industrial by-products were carried out to evaluate biogas production and sensitivity of the process to inhibiting compounds. Blends containing different percentages of OMW, digested liquid manure, and citrus peel were subjected to a batch anaerobic digestion process under both mesophilic and thermophilic conditions. The results showed that blends with percentages of OMW higher than 20% (v/v) had low methane yields due high concentrations of polyphenols (PPs) and/or volatile fatty acids (concentrations above 0.8 g kg–1 and 2.4 g L–1, respectively). The addition of other substrates such as citrus peel may have induced synergic inhibiting effects of PPs and essential oils (EO) on microbial growth. Thermophilic processes were more sensitive to these inhibiting compounds than mesophilic processes. The results of this study suggest that reducing PPs and EO concentrations in blends subject to anaerobic digestion below the inhibiting concentrations of 0.6 g L–1 and 0.5 g kg–1, respectively, is suitable. Additionally, it is advisable to maintain the volatile fatty acids content below 2 g L–1 to avoid its evident toxic effects on the growth of microorganisms in biochemical processes.

scholarly journals Extracellular laccase production and phenolic degradation by an olive mill wastewater isolate

2018 ◽  
Vol 69 (1) ◽  
pp. 231 ◽  
Author(s):  
R. Kumar ◽  
Y. Raizner ◽  
L. I. Kruh ◽  
O. Menashe ◽  
H. Azaizeh ◽  
...  
Keyword(s):  
Gallic Acid ◽  
Antimicrobial Agents ◽  
Olive Mill Wastewater ◽  
Organic Load ◽  
Laccase Production ◽  
16S Rna ◽  
Extracellular Laccase ◽  
Acinetobacter Pittii ◽  
Constitutive Production ◽  
Olive Mill

Olive mill wastewater (OMWW) presents a challenge to the control of effluents due to the presence of a high organic load, antimicrobial agents (monomeric-polymeric phenols, volatile acids, polyalcohols, and tannins), salinity and acidity. In this study, the production of extracellular laccase, monomeric or polymeric phenol, from an OMWW isolate based on its ability to biodegrade phenols and gallic acid as a model of phenolic compounds in OMWW was investigated. Phylogenetic analysis of the 16S RNA gene sequences identified the bacterial isolate (Acinetobacter REY) as being closest to Acinetobacter pittii. This isolate exhibited a constitutive production of extracellular laccase with an activity of 1.5 and 1.3 U ml/L when supplemented with the inducers CuSO4 and CuSO4+phenols, respectively. Batch experiments containing minimal media supplemented with phenols or gallic acid as the sole carbon and energy source were performed in order to characterize their phenolic biodegradability. Acinetobacter REY was capable of biodegrading up to 200 mg/L of phenols and gallic acid both after 10 h and 72 h, respectively.

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