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Journal ArticleDOI

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

TL;DR: The total mono-cyclic phenol reduction in OMW in this study was carried out by aerobic pre-treatment using the yeast Candida tropicalis in a 18 L batch reactor at 30 degrees C for 12 days followed by anaerobic co-digestion.
About: This article is published in Journal of Hazardous Materials.The article was published on 2009-05-30. It has received 43 citations till now. The article focuses on the topics: Anaerobic bacteria & Biogas.
Citations
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Journal ArticleDOI
TL;DR: In this article, the authors highlight on the treatment approaches and valorization options for dealing with olive mill waste residues, predominantly those allowing for the recovery of valuable natural components such as phenolic compounds, dietary fibers, animal feed, biofuel, biogaz, enzymes, polymers and other.

470 citations

Journal ArticleDOI
TL;DR: A brief summary of sources of lignin, methods of depolymerization, biological pathways for conversion of the lign in monomers and the analytical tools necessary for characterizing and evaluating key lignIn attributes are given.

285 citations

Journal ArticleDOI
TL;DR: The technical feasibility and effectiveness of using JLR as one-stage anaerobic system for the co-digestion of OMW and LPM is indicated and confirmed that the proportion 30% LPM gives the optimum condition for excellent stability of digester.

94 citations

Journal ArticleDOI
TL;DR: The biotechnological potential of indigenous microbiota should be further exploited in respect to olive mill waste bioremediation and inactivation of plant and human pathogens.
Abstract: Olive mill wastes (OMWs) are high-strength organic effluents, which upon disposal can degrade soil and water quality, negatively affecting aquatic and terrestrial ecosystems. The main purpose of this review paper is to provide an up-to-date knowledge concerning the microbial communities identified over the past 20 years in olive mill wastes using both culture-dependent and independent approaches. A database survey of 16S rRNA gene sequences (585 records in total) obtained from olive mill waste environments revealed the dominance of members of Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Firmicutes, and Actinobacteria. Independent studies confirmed that OMW microbial communities' structure is cultivar dependant. On the other hand, the detection of fecal bacteria and other potential human pathogens in OMWs is of major concern and deserves further examination. Despite the fact that the degradation and detoxification of the olive mill wastes have been mostly investigated through the application of known bacterial and fungal species originated from other environmental sources, the biotechnological potential of indigenous microbiota should be further exploited in respect to olive mill waste bioremediation and inactivation of plant and human pathogens. The implementation of omic and metagenomic approaches will further elucidate disposal issues of olive mill wastes.

77 citations

Journal ArticleDOI
TL;DR: A stable process able of degrading the original OMW alone was obtained through the effluents complementarity concept and OMW is an energy resource through anaerobiosis without additional expenses to correct it or decrease its concentration/toxicity.

73 citations


Cites background or methods from "Anaerobic treatment of olive mill w..."

  • ...To overcome these problems several synthetic nutrient, chemical additions and pretreatments (chemical and biochemical) have been reported to enable OMW anaerobic digestion (Dareioti et al., 2009; El-Gohary et al., 2009; Martinez-Garcia et al., 2009; Azbar et al., 2009, Gelegenis et al., 2007)....

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  • ...Other mixture (75% OMW plus 25% pig slurry) was pre-treated by Candida tropicalis and digested in a fixed bed reactor (HTR of 11 days) to give 1.61 m3 m 3 d 1 of biogas (Martinez-Garcia et al., 2009)....

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  • ...Pre-treatment ( C. tropicalis: Martinez-Garcia et al., 2007, 2009); pH adjustments (Gelegenis et al., 2007); urea and alkali (14 g NaHCO3 L 1) additions (Dareioti et al., 2009) are some examples of the undertaken actions....

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References
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Journal ArticleDOI
E. G. Bligh1, W. J. Dyer1
TL;DR: The lipid decomposition studies in frozen fish have led to the development of a simple and rapid method for the extraction and purification of lipids from biological materials that has been applied to fish muscle and may easily be adapted to use with other tissues.
Abstract: Lipid decomposition studies in frozen fish have led to the development of a simple and rapid method for the extraction and purification of lipids from biological materials. The entire procedure can...

46,099 citations


"Anaerobic treatment of olive mill w..." refers methods in this paper

  • ...Lipid content was determined by the Bligh and Dyer method [28]....

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Journal ArticleDOI
TL;DR: In this paper, the main results obtained with the process in the laboratory as well as in 6 m3 pilot plant and 200 m3 full-scale experiments are presented and evaluated in this paper.
Abstract: In recent years considerable effort has been made in the Netherlands toward the development of a more sophisticated anaerobic treatment process, suitable for treating low a strength wastes and for applications at liquid detention times of 3–4 hr. The efforts have resulted in new type of upflow anaerobic sludge blanket (UASB) process, which in recent 6 m3 pilot-plant experiments has shown to be capable of handling organic space loads of 15–40 kg chemical oxygen demand (COD)·m−3/day at 3–8 hr liquid detention times. In the first 200 m3 full-scale plant of the UASB concept, organic space loadings of up to 16 kg COD·m−3/day could be treated satisfactorily at a detention times of 4 hr, using sugar beet waste as feed. The main results obtained with the process in the laboratory as well as in 6 m3 pilot plant and 200 m3 full-scale experiments are presented and evaluated in this paper. Special attention is given to the main operating characteristics of the UASB reactor concept. Moreover, some preliminary results are presented of laboratory experiments concerning the use of the USB reactor concept for denitrification as well as for the acid formation step in anaerobic treatment. For both purposes the process looks feasible because very satisfactory results with respect to denitrification and acid formation can be achieved at very high hydraulic loads (12 day−1) and high organic loading rates, i.e., 20 kg COD·m−3/day in the denitrification and 60–80 kg COD·m−3/day in the acid formation experiments.

1,339 citations

Journal ArticleDOI
TL;DR: Immobilization of oxidative enzymes on porous ceramic supports or resins did not adversely affect their stability and showed a good potential for degradation of environment persistent aromatics.
Abstract: A number of oxidative enzymes from bacteria, fungi and plants have been reported to play an important role in numerous waste treatment applications. Peroxidases and/or phenoloxidases can act on specific recalcitrant pollutants by precipitation or transforming to other products and permitting a better final treatment of the waste. Improvement in the useful life and thereby a reduction in treatment cost has been accomplished through enzyme immobilization. Horseradish peroxidase, lignin peroxidase and manganese peroxidase mineralize a variety of recalcitrant aromatic compounds. Immobilization of these enzymes on porous ceramic supports or resins did not adversely affect their stability and showed a good potential for degradation of environment persistent aromatics. Tyrosinase, which catalyzes the hydroxylation of phenols and dehydrogenation of o-diphenols, in an immobilized form exerted an excellent phenol removal. Laccase is capable of eliminating the phenols through polymerization process, however, the presence of mediator such as ABTS and HBT degraded phenol by oxidative process. Many applications with oxidative enzymes and plant materials in effluent as in soil remediation will be discussed.

894 citations


"Anaerobic treatment of olive mill w..." refers background in this paper

  • ...Phenolic compounds are considered to be persistent and recalcitrant in the environment [3], toxic to most bacteria and fungi and are used as a slimicide and disinfectant [4]....

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Journal ArticleDOI
TL;DR: Modeling based on the results of ATA indicated that aceticlastic methanogens acclimated to high concentrations of TAN were less sensitive to increase in TAN and could tolerate wider pH ranges, depending on acclimation condition and system pH.

469 citations


"Anaerobic treatment of olive mill w..." refers background in this paper

  • ...The presence of ammonia–nitrogen is beneficial at concentrations between 50 and 200mgL−1 as an essential nutrient; however itmay be detrimental at high concentrations [38,39]....

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