Anaerobic treatment of olive mill wastewater and piggery effluents fermented with Candida tropicalis

Martinez-Garcia, G.; Johnson, Anbu Clemensis; Bachmann, Robert Thomas; Williams, Colin H.; Burgoyne, Andrea; Edyvean, R.G.J.

doi:10.1016/j.jhazmat.2008.09.055

Cited by 46 publications

(20 citation statements)

References 46 publications

(43 reference statements)

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“…methanogenic bacteria) could be a limiting factor in conventional methods of microbial degradation that are usually applied to OMWs. Some strains of the yeasts Candida tropicalis and Yarrowia lipolytica can reduce the chemical oxygen demand, monophenols and polyphenols in OMW (Lanciotti et al, 2005;Martinez-Garcia et al, 2009). Candida rugosa, Candida cylindracea and Y. lipolytica can grow on OMW-based medium and produce high-value compounds while degrading this waste (Brozzoli et al, 2009;Gonçalves et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

An alkaline β-glucosidase isolated from an olive brine strain of Wickerhamomyces anomalus

Restuccia

Muccilli

Palmeri

et al. 2011

FEMS Yeast Research

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An efficient β-glucosidase (βG)-producing strain, Wickerhamomyces anomalus BS81, was isolated from naturally fermented olive brine and identified based on PCR/restriction fragment length polymorphism of the rDNA internal transcribed spacer and sequence analysis of the D1/D2 region of the 26S rRNA gene. The hydrolytic activity of the βG had an optimum pH of 8.5 and an optimum temperature of 35 °C. The enzyme had high substrate specificity and high catalytic efficiency (K(m) 0.99 mM, V(max) 14 U g(-1) of cells) for p-nitrophenyl-β-d-glucopyranoside. The enzyme was activated by increasing concentrations of NaCl, with maximum activity at 150 g L(-1) NaCl. Although βGs have been purified and characterized from several other sources, the W. anomalusβG is unique among βGs because its relative maximum activity occurs at alkaline pH and 35 °C. Moreover, the yeast strain has esterase activity that acts synergistically with βG to degrade oleuropein to debitter table olives and olive oil.

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Section: Discussionmentioning

confidence: 99%

An alkaline β-glucosidase isolated from an olive brine strain of Wickerhamomyces anomalus

Restuccia

Muccilli

Palmeri

et al. 2011

FEMS Yeast Research

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“…27,28 As reported by Hamdi et al, 29 the use of anaerobic fixed bed biofilm reactors allows for retaining more active biomass within the reactor and limiting the toxicity of inhibitory compounds contained in the OMWW, which can consequently reduce the start-up period as compared to suspended biomass reactors. Before the semi-continuous feeding, the reactor was maintained under batch operation by recycling a mixture of sludge and substrate until the system was enriched with microorganisms acclimated to the OMWW as measured by the increase in the biogas production.…”

Section: Performance Of the Anaerobic Digestion Of Omww In The Pbbr-gacmentioning

confidence: 98%

“…The acclimatization period, lasting 16 days, was more than 30 days short as compared to other anaerobic contact reactors. 27,28 As reported by Hamdi et al, 29 the use of anaerobic fixed bed biofilm reactors allows for retaining more active biomass within the reactor and limiting the toxicity of inhibitory compounds contained in the OMWW, which can consequently reduce the start-up period as compared to suspended biomass reactors.…”

Section: Performance Of the Anaerobic Digestion Of Omww In The Pbbr-gacmentioning

confidence: 98%

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

Enaime

Nettmann

Berzio

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The treatment of olive mill wastewater (OMWW) in a packed bed biofilm reactor (PBBR) and the identification of different microorganisms involved in the digestion process is an attractive field for research. RESULTS: A PBBR treating OMWW under different organic loading rates (OLRs) (0.94-9.36 gCOD/(L d)), showed high stability during an extensive time (723 days) without any sign of acidification. High volumetric biogas and methane (CH 4 ) productions, 4.1 and 2.4 L N /(L reactor d), respectively were registered at the highest OLR. Meanwhile, high chemical oxygen demand (COD) removal (62.5-79.7%) was obtained throughout the experiment. Phenolic compounds removal was much higher during the first steps of the experiment (75.9-84.2%), and decreased as the OLR increased to about 38%. High homogeneity of biofilm thickness and Bacteria and extracellular polymeric substance distribution were demonstrated by confocal laser scanning microscopy. Results of real-time quantitative polymerase chain reaction (PCR) and 16S rRNA amplicon analyses showed that Bacteria, mainly consisting of Firmicutes, Proteobacteria, Bacteroidetes andChloroflexi phylum, was about eight times more abundant than Archaea in the reactor liquid phase, while Bacteria to Archaea ratio was almost one in the biofilm. This points to a major degradation of organic substances in the liquid, while methanogenesis occurred mainly within the biofilm. In the liquid, acetoclastic methanogens were more abundant than hydrogenotrophic ones, while both groups showed likely very similar contributions in the biofilm.CONCLUSION: Promising results have been presented throughout this work providing information about the long-term operation of PBBR-granular activated carbon treating OMWW and analyzing, in an efficient manner, the structure and the composition of the microbial community involved in OMWW digestion.

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“…and Candida tropicalis , led to an average reduction in terms of COD to 52.5%, 44.3 and 51.7%, respectively [14]. Anaerobic processes have resulted in 60-70% of COD removal [15]. Through the years, researchers have tested a variety of technologies for OMW treatment.…”

Section: Introductionmentioning

confidence: 99%

Investigation of effective treatment techniques for Olive mill wastewater

2018

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SELECTION of cost-effective treatment modules for high saline wastewater produced from the olive mill is a challenging task. The aim of this study is to select the most effective technology applied to treat Olive mill wastewater. Several trials using various techniques were carried out to treat wastewater produced from pickling olives and olive oil manufacturing; for instance, anaerobic-aerobic, coagulation/flocculation, and electrocoagulation. The characteristics of olive manufacturing raw wastewater in terms of total dissolved solids (TDS), chemical oxygen demand (COD) and oil and grease were 10032, 9174, and 914.8 mg/l respectively. The results showed that electro-coagulation technique with aluminum electrodes and operating parameters of 30 voltage and 1.5 hours achieved COD removal rate 84%. However, the residual concentration (900 mgO 2 /l) still needs further treatment. Aerobic treatment using activated sludge was applied after electrocoagulation. The results showed that the use aerobic treatment after electrocoagulation is more efficient than the use of anaerobic. Analysis of the treated water showed that the maximum COD removal efficiencies were 98% at optimum conditions. The effluent quality meets the discharge regulatory standard. Consequently, the electrocoagulation followed by aerobic process can be considered as a reliable, safe and costeffective method for the treatment of olive millwastewater.

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Anaerobic treatment of olive mill wastewater and piggery effluents fermented with Candida tropicalis

Cited by 46 publications

References 46 publications

An alkaline β-glucosidase isolated from an olive brine strain of Wickerhamomyces anomalus

An alkaline β-glucosidase isolated from an olive brine strain of Wickerhamomyces anomalus

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

Investigation of effective treatment techniques for Olive mill wastewater

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