Chemical Coagulation/Flocculation Processes for Removal of Phenolic Compounds from Olive Mill Wastewater: A Comprehensive Review

Olive oil extraction processes generate three phases: Olive oil, solid residue (pomace) and aqueous liquor Olive Mill Wastewater (OMW). OMW causes serious environmental deteriorations such as coloring of natural waters, alteration of soil quality, phytotoxicity and odor nuisance. The direct discharge of this effluent into the soil bring various negative effects on the environment, due to its high load of organic matter and phenolic compounds. Coagulation, flocculation and their combination processes are among the most applied processes for wastewater treatment. The application of coagulation technique using mineral and inorganic polymeric coagulants and acid cracking is not always effective to reduce COD and phenolic compounds from OMW except lime. Although direct flocculation is a low treatment cost, use less chemical and produce less sludge, the efficiency of COD and phenolic compounds removal remain very low. Coagulation-flocculation process is developed in order to enhance the removal efficiency of organic matter from OMW by optimizing the operating conditions. However, many studies showed that the combination of various cationic organic coagulant and flocculant agents did not show any significant decrease of COD and phenolic compounds except for lime combination. In the present review, recent research studies dealing with the application of coagulation/flocculation for removal of phenolic compounds and COD from OMW are presented and compared. Furthermore, the main factors that influence the selection between coagulation, direct flocculation and coagulation-flocculation are presented and the principal removal mechanisms are discussed.

[1]  Lu,et al.  Physico-chemical Treatability of Olive Mill Wastewater (OMW) , 2009 .

[2]  J. Gregory,et al.  Coagulation by hydrolysing metal salts , 2003 .

[3]  Evan Diamadopoulos,et al.  Technologies for olive mill wastewater (OMW) treatment: a review , 2006 .

[4]  S. Sayadi,et al.  Low cost biosorbent "banana peel" for the removal of phenolic compounds from olive mill wastewater: kinetic and equilibrium studies. , 2009, Journal of hazardous materials.

[5]  M. Rafatullah,et al.  Oil Palm Biomass–Based Adsorbents for the Removal of Water Pollutants—A Review , 2011, Journal of environmental science and health. Part C, Environmental carcinogenesis & ecotoxicology reviews.

[6]  Grazia Leonzio.  Optimization of column distillation in a wastewater treatment plant , 2017 .

[7]  F. Cuadros,et al.  Effect of aerobic pretreatment on anaerobic digestion of olive mill wastewater (OMWW): An ecoefficient treatment , 2015 .

[8]  A. Chiavola,et al.  Biological treatment of olive mill wastewater in a sequencing batch reactor , 2014 .

[9]  Javier Miguel Ochando-Pulido,et al.  Kinetic and thermodynamic parameters of iron adsorption onto olive stones , 2013 .

[10]  B. Gao,et al.  Effects of pH on coagulation behavior and floc properties in Yellow River water treatment using ferric based coagulants , 2010 .

[11]  D. Fatta-Kassinos,et al.  Treatment efficiency and economic feasibility of biological oxidation, membrane filtration and separation processes, and advanced oxidation for the purification and valorization of olive mill wastewater. , 2017, Water research.

[12]  J. Fernández-Bolaños,et al.  Isolation of a powerful antioxidant from Olea europaea fruit-mill waste : 3,4-Dihydroxyphenylglycol , 2009 .

[13]  D. Fatta-Kassinos,et al.  Utilizing solar energy for the purification of olive mill wastewater using a pilot-scale photocatalytic reactor after coagulation-flocculation. , 2014, Water research.

[14]  B. Aliakbarian,et al.  Kinetic and Isotherm Modelling of the Adsorption of
Phenolic Compounds from Olive Mill Wastewater onto Activated Carbon. , 2015, Food technology and biotechnology.

[15]  K. Al-Malah,et al.  Dynamic Post-treatment Response of Olive Mill Effluent Wastewater Using Activated Carbon , 2004, Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering.

[16]  Tonni Agustiono Kurniawan,et al.  Low-cost adsorbents for heavy metals uptake from contaminated water: a review. , 2003, Journal of hazardous materials.

[17]  Frans Knops,et al.  Impact of coagulation pH on enhanced removal of natural organic matter in treatment of reservoir water , 2006 .

[18]  M. Raviv,et al.  Mechanisms governing the leaching of soil metals as a result of disposal of olive mill wastewater on agricultural soils. , 2018, The Science of the total environment.

[19]  P. Martikainen,et al.  Molecular size distribution of natural organic matter in raw and drinking waters. , 2001, Chemosphere.

[20]  T. Yonar,et al.  Pre-treatment studies on olive oil mill effluent using physicochemical, Fenton and Fenton-like oxidations processes. , 2010, Journal of hazardous materials.

[21]  Nuri Azbar,et al.  Improvement in anaerobic degradation of olive mill effluent (OME) by chemical pretreatment using batch systems , 2008 .

[22]  R. K. Abdulrahman,et al.  Treatment of olive mill wastewater using physico-chemical and Fenton processes , 2015 .

[23]  M. Nadour,et al.  Olive mill wastes: Biochemical characterizations and valorization strategies , 2013 .

[24]  I. P. Marques,et al.  Bioenergy recovery from olive mill effluent in a hybrid reactor. , 2012 .

[25]  M. Lucas,et al.  Combined treatment of olive mill wastewater by Fenton's reagent and anaerobic biological process , 2015, Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering.

[26]  G. Hodaifa,et al.  Real olive oil mill wastewater treatment by photo-Fenton system using artificial ultraviolet light lamps , 2017 .

[27]  J. Gregory,et al.  Hydrolyzing metal salts as coagulants , 2001 .

[28]  L. Ersoy,et al.  Characterization and lime treatment of olive mill wastewater. , 2001, Water research.

[29]  T. Rocha-Santos,et al.  Toxicity and organic content characterization of olive oil mill wastewater undergoing a sequential treatment with fungi and photo-Fenton oxidation. , 2009, Journal of hazardous materials.

[30]  Zhenbei Wang,et al.  Insight into the combined coagulation-ultrafiltration process: The role of Al species of polyaluminum chlorides , 2017 .

[31]  I. Arslan-Alaton,et al.  UV fluorescence, FTIR, and GC–MS analyses and resin fractionation procedures as indicators of the chemical treatability of olive mill wastewater , 2016 .

[32]  N. Kalogerakis,et al.  Sequential coagulation-flocculation, solvent extraction and photo-Fenton oxidation for the valorization and treatment of olive mill effluent , 2013 .

[33]  P. Cañizares,et al.  Costs of the electrochemical oxidation of wastewaters: a comparison with ozonation and Fenton oxidation processes. , 2009, Journal of environmental management.

[34]  M. Mbarki,et al.  Identification and characterisation of phenolic compounds extracted from Moroccan olive mill wastewater , 2014 .

[35]  M. Khayet,et al.  Micellar enhanced ultrafiltration process for the treatment of olive mill wastewater. , 2011, Water research.

[36]  H. Mat,et al.  Surfactant modification of banana trunk as low-cost adsorbents and their high benzene adsorptive removal performance from aqueous solution , 2016 .

[37]  C. Akratos,et al.  Chapter 7 – Integrated biological treatment of olive mill waste combining aerobic biological treatment, constructed wetlands, and composting , 2017 .

[38]  F. Chi,et al.  A study of coagulation mechanisms of polyferric sulfate reacting with humic acid using a fluorescence-quenching method. , 2002, Water research.

[39]  E. Tipping,et al.  Modeling electrostatic and heterogeneity effects on proton dissociation from humic substances , 1990 .

[40]  Jesús Beltrán de Heredia,et al.  Aluminium sulfate as coagulant for highly polluted cork processing wastewaters: removal of organic matter. , 2007, Journal of hazardous materials.

[41]  Javier Miguel Ochando Pulido,et al.  A review on the use of membrane technology and fouling control for olive mill wastewater treatment. , 2016, The Science of the total environment.

[42]  B. Jefferson,et al.  Identifying the linkage between particle characteristics and understanding coagulation performance , 2006 .

[43]  F. Mantzouridou,et al.  Changes in Phenolic Compounds and Phytotoxicity of the Spanish-Style Green Olive Processing Wastewaters by Aspergillus niger B60. , 2018, Journal of agricultural and food chemistry.

[44]  Carlo Vandecasteele,et al.  Reuse, treatment, and discharge of the concentrate of pressure-driven membrane processes. , 2003, Environmental science & technology.

[45]  G. Zervakis,et al.  Raw and microbiologically detoxified olive mill waste and their impact on plant growth. , 2010 .

[46]  S. Sayadi,et al.  Olive wastewater as an ecological fertiliser , 2006 .

[47]  D. Dixon,et al.  The Use of Cationic Polymers as Primary Coagulants in Water Treatment , 1998 .

[48]  M. Sillanpää,et al.  Removal of natural organic matter in drinking water treatment by coagulation: A comprehensive review. , 2018, Chemosphere.

[49]  M. F. Chong,et al.  A review on application of flocculants in wastewater treatment , 2014 .

[50]  E. Drioli,et al.  Comparison of the performance of UF membranes in olive mill wastewaters treatment. , 2011, Water research.

[51]  M. Ferretti,et al.  Sorbents Coupled to Solar Light TiO2-Based Photocatalysts for Olive Mill Wastewater Treatment , 2016 .

[52]  M. Lübken,et al.  Olive mill wastewater pretreatment by combination of filtration on olive stone filters and coagulation–flocculation , 2019, Environmental technology.

[53]  G. Schaumann,et al.  Land disposal of olive mill wastewater enhances ability of soil to sorb diuron: Temporal persistence, and the effects of soil depth and application season , 2017 .

[54]  S. Skoulika,et al.  The effects of olives harvest period and production year on olive mill wastewater properties - evaluation of Pleurotus strains as bioindicators of the effluent's toxicity. , 2013, Chemosphere.

[55]  W. Brostow,et al.  POLYMERIC FLOCCULANTS FOR WASTEWATER AND INDUSTRIAL EFFLUENT TREATMENT , 2009 .

[56]  Bruce Jefferson,et al.  Floc structural characteristics using conventional coagulation for a high doc, low alkalinity surface water source. , 2006, Water research.

[57]  C. Paraskeva,et al.  Effect of electrolytes/polyelectrolytes on the removal of solids and organics from olive mill wastewater , 2016 .

[58]  D. Lataye,et al.  Adsorption of phenol onto Banana Peels Activated Carbon , 2017 .

[59]  M. Abderrabba,et al.  Towards a high yield recovery of polyphenols from olive mill wastewater on activated carbon coated with milk proteins: Experimental design and antioxidant activity. , 2018, Food chemistry.

[60]  I. Arslan-Alaton,et al.  Treatment of olive mill wastewater by chemical processes: effect of acid cracking pretreatment. , 2014, Water science and technology : a journal of the International Association on Water Pollution Research.

[61]  J. Gregory,et al.  Temperature effects on flocculation, using different coagulants. , 2004, Water science and technology : a journal of the International Association on Water Pollution Research.

[62]  N. Hilal,et al.  Effective coagulation-flocculation treatment of highly polluted palm oil mill biogas plant wastewater using dual coagulants: Decolourisation, kinetics and phytotoxicity studies , 2017 .

[63]  A. Rozzi,et al.  Treatment and disposal of olive mill effluents , 1996 .

[64]  Xiaoying Pan,et al.  Comparative study of the effects of experimental variables on growth rates of aluminum and iron hydroxide flocs during coagulation and their structural characteristics , 2010 .

[65]  D. Greenland.  INTERACTIONS BETWEEN HUMIC AND FULVIC ACIDS AND CLAYS , 1971 .

[66]  N. Elloumi,et al.  Changes in Soil Macronutrients after a Long-Term Application of Olive Mill Wastewater , 2015 .

[67]  E. Chatzisymeon,et al.  Photo-Fenton treatment of saccharin in a solar pilot compound parabolic collector: Use of olive mill wastewater as iron chelating agent, preliminary results. , 2019, Journal of hazardous materials.

[68]  M. Hamdi.  Nouvelle conception d'un procédé de dépollution biologique des margines, effluents liquides de .l'extraction de l'huile d'olive , 1991 .

[69]  S. Otles,et al.  Treatment of Olive Mill Wastewater and the Use of Polyphenols Obtained After Treatment , 2012 .

[70]  G. Hodaifa,et al.  Flocculation on the Treatment of Olive Oil Mill Wastewater: Pretreatment , 2015 .

[71]  P. Koutsoukos,et al.  Implementation of membrane filtration and melt crystallization for the effective treatment and valorization of olive mill wastewaters , 2018 .

[72]  Huai-zhi Li,et al.  Effect of Fenton pretreatment on anaerobic digestion of olive mill wastewater and olive mill solid waste in mesophilic conditions , 2017 .

[73]  D. Pinelli,et al.  Olive mill wastewater valorisation through phenolic compounds adsorption in a continuous flow column , 2016 .

[74]  P. P. Pathe,et al.  Pre-Treatment of Currency Printing Ink Wastewater through Coagulation-Flocculation Process , 2003 .

[75]  T. Manios,et al.  Treatment of olive mill effluents by coagulation-flocculation-hydrogen peroxide oxidation and effect on phytotoxicity. , 2006, Journal of hazardous materials.

[76]  L. Mandi,et al.  Caractérisation des margines issues d’une huilerie moderne et essais de leur traitement par coagulation-floculation par la chaux et le sulfate d’aluminium. , 2008 .

[77]  P. Chiang,et al.  Effects of polyelectrolytes on reduction of model compounds via coagulation. , 2005, Chemosphere.

[78]  J. Sigoillot,et al.  Simple phenolic content in olive oil residues as a function of extraction systems , 2001 .

[79]  Trond Peder Flaten,et al.  Aluminium as a risk factor in Alzheimer’s disease, with emphasis on drinking water , 2001, Brain Research Bulletin.

[80]  D. Vayenas,et al.  Treatment of olive mill wastewater using a coagulation–flocculation process either as a single step or as post‐treatment after aerobic biological treatment , 2014 .

[81]  M. Mountadar,et al.  Roles of two white-rot basidiomycete fungi in decolorisation and detoxification of olive mill waste water , 2001, Applied Microbiology and Biotechnology.

[82]  N. Ouazzani,et al.  Biomass behaviour in a conventional activated sludge system treating olive mill wastewater , 2018, Environmental technology.

[83]  A. Madeo,et al.  Effects of olive mill wastewater spreading on the physico-chemical and microbiological characteristics of soil , 2008 .

[84]  N. Kalogerakis,et al.  Treatment of olive mill effluents Part II. Complete removal of solids by direct flocculation with poly-electrolytes. , 2005, Environment international.

[85]  H. Iovu,et al.  Preparation of polyelectrolytes for wastewater treatment. , 2004, Journal of hazardous materials.

[86]  S. Mandavgane,et al.  Preparation and characterization of raw and carbon from banana peel by microwave activation: Application in citric acid adsorption , 2015 .

[87]  E. Ammar,et al.  Time-dependent evolution of olive mill wastewater sludge organic and inorganic components and resident microbiota in multi-pond evaporation system. , 2010, Bioresource Technology.

[88]  P. Galiatsatou,et al.  Treatment of olive mill waste water with activated carbons from agricultural by-products. , 2002, Waste management.

[89]  John Gregory,et al.  Organic polyelectrolytes in water treatment. , 2007, Water research.

[90]  D. J. Nozaic,et al.  Longterm experience in the use of polymeric coagulants at Umgeni Water , 2001 .

[91]  G. Hodaifa,et al.  Flocculation–Sedimentation Combined with Chemical Oxidation Process , 2011 .

[92]  T. D. Waite,et al.  Chemical Water and Wastewater Treatment VII , 2002 .

[93]  B. Ahring,et al.  Effects of free long-chain fatty acids on thermophilic anaerobic digestion , 1992, Applied Microbiology and Biotechnology.

[94]  M. Scholz.  Coagulation and flocculation , 2016 .

[95]  B. Marrot,et al.  Olive mill wastewater treatment in a membrane bioreactor: Process feasibility and performances , 2008 .

[96]  E. Ammar,et al.  Co-composting of oil exhausted olive-cake, poultry manure and industrial residues of agro-food activity for soil amendment. , 2008, Bioresource technology.

[97]  M. Lucas,et al.  Treatment of olive mill wastewater by a combined process: Fenton's reagent and chemical coagulation , 2009, Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering.

[98]  N. Graham,et al.  Enhanced Coagulation Using Al/Fe(III) Coagulants: Effect of Coagulant Chemistry on the Removal of Colour-Causing NOM , 1996 .

[99]  Duu-Jong Lee,et al.  Coagulation of Natural Organic Matters Using Aluminum Tridecamer (Al 13 ) with Counter Ions , 2013 .

[100]  L. Hassani,et al.  Application of lime and calcium hypochlorite in the dephenolisation and discolouration of olive mill wastewater. , 2009, Journal of environmental management.

[101]  Christakis A. Paraskeva,et al.  Isolation of Purified High Added Value Products from Olive Mill Wastewater Streams Through the Implementation of Membrane Technology and Cooling Crystallization Process , 2016 .

[102]  Bilel Hadrich,et al.  Olive mill wastewater disposal in evaporation ponds in Sfax (Tunisia): moisture content effect on microbiological and physical chemical parameters , 2009, Biodegradation.

[103]  P. Cañizares,et al.  Advanced oxidation processes for the treatment of olive-oil mills wastewater. , 2007, Chemosphere.

[104]  E. Duarte,et al.  Reuse of drinking water treatment sludge for olive oil mill wastewater treatment. , 2012, Water science and technology : a journal of the International Association on Water Pollution Research.

[105]  A. Zouboulis,et al.  COAGULATION-FLOCCULATION PROCESSES IN WATER / WASTEWATER TREATMENT : THE APPLICATION OF NEW GENERATION OF CHEMICAL REAGENTS , 2008 .

[106]  N. Russell,et al.  Bioremediation and biovalorisation of olive-mill wastes , 2009, Applied Microbiology and Biotechnology.

[107]  E. Diamadopoulos,et al.  Effect of key operating parameters on the non-catalytic wet oxidation of olive mill wastewaters. , 2009, Water science and technology : a journal of the International Association on Water Pollution Research.

[108]  W. Banks,et al.  Aluminum complexing enhances amyloid β protein penetration of blood–brain barrier , 2006, Brain Research.

[109]  N. Silvestri,et al.  Short- and long-term effects of olive mill wastewater land spreading on soil chemical and biological properties , 2013 .

[110]  Charis M. Galanakis,et al.  Agronomic application of olive mill wastewater: Effects on maize production and soil properties. , 2016, Journal of environmental management.

[111]  R. Quinta-Ferreira,et al.  Integration of traditional systems and advanced oxidation process technologies for the industrial treatment of olive mill wastewaters , 2016, Environmental technology.

[112]  Giuseppe Mancini,et al.  The selection of pretreatment options for anaerobic digestion (AD): a case study in olive oil waste production. , 2015 .

[113]  A. Amirtharajah,et al.  Removing Color Caused by Humic Acids , 1985 .

[114]  Brunello Ceccanti,et al.  Anaerobic Digestion of Olive Oil Mill Effluents: Evaluation of Wastewater Organic Load and Phytotoxicity Reduction , 2003 .

[115]  F. Chena,et al.  Enhanced coagulation for treating slightly polluted algae-containing raw water of the Pearl River combining ozone pre-oxidation with polyaluminum chloride (PAC) , 2015 .

[116]  M. Mazet,et al.  Comparaison de l'elimination de molecules organiques par coagulation-floculation et par adsorption sur flocs d'hydroxyde metallique preformes , 1994 .

[117]  Danny R. Bedgood,et al.  Bioactivity and analysis of biophenols recovered from olive mill waste. , 2005, Journal of agricultural and food chemistry.

[118]  Sami Sayadi,et al.  Pilot scale hybrid process for olive mill wastewater treatment and reuse , 2009 .

[119]  J. A. Alburquerque,et al.  Agrochemical characterisation of "alperujo", a solid by-product of the two-phase centrifugation method for olive oil extraction. , 2004, Bioresource technology.

[120]  M. Qrunfleh.  OLIVE INDUSTRY IN JORDAN , 2011 .

[121]  A. Chianese,et al.  Technical optimization of a batch olive wash wastewater treatment membrane plant , 2006 .

[122]  Anna McElhatton,et al.  Novel Technologies in Food Science: Their Impact on Products, Consumer Trends and the Environment , 2012 .

[123]  M. Kornaros,et al.  Purification of olive mill wastewater phenols through membrane filtration and resin adsorption/desorption. , 2015, Journal of hazardous materials.

[124]  C. Brühl,et al.  Effects of Olive Mill Wastewater on Soil Microarthropods and Soil Chemistry in Two Different Cultivation Scenarios in Israel and Palestinian Territories , 2015 .

[125]  F. Ghanbari,et al.  The combination of coagulation, acid cracking and Fenton-like processes for olive oil mill wastewater treatment: phytotoxicity reduction and biodegradability augmentation. , 2015, Water science and technology : a journal of the International Association on Water Pollution Research.

[126]  A Roig,et al.  An overview on olive mill wastes and their valorisation methods. , 2006, Waste management.

[127]  M. Stoller.  On the effect of flocculation as pretreatment process and particle size distribution for membrane fouling reduction , 2009 .

[128]  M. Mountadar,et al.  Biodegradation of Toxic Compounds in Olive Mill Wastewater by a Newly Isolated Potent Strain: Aspergillus niger van Tieghem , 2013 .

[129]  B. Gao,et al.  The size and coagulation behavior of a novel composite inorganic–organic coagulant , 2008 .

[130]  Abdul Latif Ahmad,et al.  Improvement of alum and PACl coagulation by polyacrylamides (PAMs) for the treatment of pulp and paper mill wastewater , 2008 .

[131]  B. Elleuch,et al.  Electrochemical treatment of olive mill wastewater: treatment extent and effluent phenolic compounds monitoring using some uncommon analytical tools. , 2013, Journal of environmental sciences.

[132]  P C Sabumon,et al.  Reuse of textile effluent treatment plant sludge in building materials. , 2006, Waste management.

[133]  J. Beltrán-Heredia,et al.  Degradation of olive mill wastewater by the combination of Fenton's reagent and ozonation processes with an aerobic biological treatment. , 2001, Water science and technology : a journal of the International Association on Water Pollution Research.

[134]  D. Maestri,et al.  The effects of genotype and extraction methods on chemical composition of virgin olive oils from Traslasierra Valley (Córdoba, Argentina) , 2006 .

[135]  Marco Stoller,et al.  Optimization of membrane batch processes by means of the critical flux theory , 2006 .

[136]  Michel Penninckx,et al.  Olive Oil Mill Wastewater Purification by Combination of Coagulation- Flocculation and Biological Treatments , 2005, Environmental technology.

[137]  V. Karathanos,et al.  Partitioning of olive oil antioxidants between oil and water phases. , 2002, Journal of agricultural and food chemistry.

[138]  Jiangting Wang,et al.  Effect of aluminum speciation and pH on in-line coagulation/diatomite microfiltration process: Correlations between aggregate characteristics and membrane fouling , 2016 .

[139]  Ibrahim M. Banat,et al.  Physical removal of textile dyes from effluents and solid-state fermentation of dye-adsorbed agricultural residues , 2000 .

[140]  A. Chianese,et al.  Influence of the adopted pretreatment process on the critical flux value of batch membrane processes , 2007 .

[141]  M. Hamdi,et al.  Future prospects and constraints of olive mill wastewaters use and treatment: A review , 1993 .

[142]  Carmelo Maucieri,et al.  Effects of spreading olive mill wastewater on soil properties and crops, a review , 2013 .

[143]  P. Kougias,et al.  Effect of feedstock composition and organic loading rate during the mesophilic co-digestion of olive mill wastewater and swine manure , 2014 .

[144]  Príncipe de Vergara,et al.  INTERNATIONAL OLIVE COUNCIL , 2006 .

[145]  M. F. Chong,et al.  Direct Flocculation Process for Wastewater Treatment , 2012 .

[146]  Apostolos Vlyssides,et al.  Integrated strategic approach for reusing olive oil extraction by-products , 2004 .

[147]  Yanxin Wei,et al.  Characterization and coagulation–flocculation behavior of an inorganic polymer coagulant – poly-ferric-zinc-sulfate , 2016 .

[148]  J. Giesy,et al.  The impact of metallic coagulants on the removal of organic compounds from oil sands process-affected water. , 2011, Environmental science & technology.

[149]  Francesco Rossini,et al.  Enzyme and fungal treatments and a combination thereof reduce olive mill wastewater phytotoxicity on Zea mays L. seeds. , 2007, Chemosphere.

[150]  Leila Jemni Ben Ayed,et al.  Decolorization of fresh and stored-black olive mill wastewaters by Geotrichum candidum , 2002 .

[151]  B. Zenjari,et al.  Impact of spreading olive mill wastewater on soil characteristics: laboratory experiments , 2001 .

[152]  B. Gao,et al.  The impact of pH on floc structure characteristic of polyferric chloride in a low DOC and high alkalinity surface water treatment. , 2011, Water research.

[153]  J. Goodwill,et al.  Impacts of ferrate oxidation on natural organic matter and disinfection byproduct precursors. , 2016, Water research.

[154]  François Renault,et al.  Chitosan for coagulation/flocculation processes. An eco-friendly approach. , 2009 .

[155]  M. Azzam.  Olive mills wastewater treatment using mixed adsorbents of volcanic tuff, natural clay and charcoal , 2018 .

[156]  L. Palma,et al.  Threshold performance of a spiral-wound reverse osmosis membrane in the treatment of olive mill effluents from two-phase and three-phase extraction processes , 2014 .

[157]  A. Zouboulis,et al.  Polyferric sulphate: preparation, characterisation and application in coagulation experiments. , 2008, Journal of hazardous materials.

[158]  A. Kilic,et al.  Use of advance oxidation process to improve the biodegradability of olive oil mill effluents , 2015 .

[159]  N. Ouazzani,et al.  Removal of phenolic compounds from olive mill wastewater by adsorption onto wheat bran , 2014 .

[160]  M. Ksibi,et al.  Removal of organic load and phenolic compounds from olive mill wastewater by Fenton oxidation with zero-valent iron. , 2009 .

[161]  A. Bahadori,et al.  Essentials of Water Systems Design in the Oil, Gas, and Chemical Processing Industries , 2013 .

[162]  G. Sbai,et al.  TRAITEMENT DES MARGINES PAR UN PROCEDE COUPLANT LA COAGULATION FLOCULATION ET LA VOIE ELECTROCHIMIQUE , 2015 .

[163]  J. Espín,et al.  OLEUROPEIN AND RELATED COMPOUNDS , 2000 .

[164]  S. Phuntsho,et al.  Comparison of a novel polytitanium chloride coagulant with polyaluminium chloride: coagulation performance and floc characteristics. , 2015, Journal of environmental management.

[165]  N. Ouazzani,et al.  Removal of organic pollutants and nutrients from olive mill wastewater by a sand filter. , 2009, Journal of environmental management.

[166]  B. A. Conway,et al.  The effects of laforin, malin, Stbd1, and Ptg deficiencies on heart glycogen levels in Pompe disease mouse models , 2015 .

[167]  I. Ntaikou,et al.  Olive oil mill wastewater toxicity in the marine environment: alterations of stress indices in tissues of mussel Mytilus galloprovincialis. , 2011, Aquatic toxicology.

[168]  M. Drikas,et al.  Absorbance spectroscopy-based examination of effects of coagulation on the reactivity of fractions of natural organic matter with varying apparent molecular weights. , 2009, Water research.

[169]  H. Gupta,et al.  Adsorption of polycyclic aromatic hydrocarbons on banana peel activated carbon , 2016 .

[170]  Sixto Malato,et al.  Pilot-plant treatment of olive mill wastewater (OMW) by solar TiO2 photocatalysis and solar photo-Fenton , 2004 .

[171]  Sami Sayadi,et al.  Treatment of olive oil mill wastewater by combined process electro-Fenton reaction and anaerobic digestion. , 2006, Water research.

[172]  John Pearson,et al.  Disposal of wool scouring sludge by composting , 2004 .

[173]  James K. Edzwald,et al.  Selection of alum and polyaluminum coagulants: principles and applications , 2006 .

[174]  M. Hamdi.  Effects of agitation and pretreatment on the batch anaerobic digestion of olive mil , 1991 .

[175]  Z. Ahmad,et al.  Treatment of pulp and paper mill wastewater with various molecular weight of polyDADMAC induced flocculation , 2011 .

[176]  M. Mazet,et al.  Influence des sels mineraux sur l'adsorption des acides humiques sur flocs d'hydroxydes de fer preformes , 1991 .

[177]  K. Saeed,et al.  Phenol removal from aqueous medium using chemically modified banana peels as low-cost adsorbent , 2016 .

[178]  Kata L. Rishel,et al.  Performance evaluation of an inclined belt filter using coagulation/flocculation aids for the removal of suspended solids and phosphorus from microscreen backwash effluent , 2006 .

[179]  A. Chiavola,et al.  Combined biological and chemical-physical process for olive mill wastewater treatment , 2010 .

[180]  F. Çeçen,et al.  Adsorption, desorption and bioregeneration in the treatment of 2-chlorophenol with activated carbon. , 2007, Journal of hazardous materials.

[181]  J. Crespo,et al.  Pilot scale nanofiltration treatment of olive mill wastewater: a technical and economical evaluation , 2017, Environmental Science and Pollution Research.

[182]  F. Visioli,et al.  Antioxidant and other biological activities of phenols from olives and olive oil , 2002, Medicinal research reviews.

[183]  M. Sillanpää,et al.  An overview of the methods used in the characterisation of natural organic matter (NOM) in relation to drinking water treatment. , 2011, Chemosphere.

[184]  B. Jefferson,et al.  Impact of fractional character on the coagulation of NOM , 2006 .

[185]  M. Stitou,et al.  Treatment and valorization of olive mill wastewaters , 2016 .

[186]  A. Rozzi,et al.  Anaerobic digestion of olive oil mill wastewaters , 1984 .

[187]  Kamal Al-Malah,et al.  Olive mills effluent (OME) wastewater post-treatment using activated clay , 2000 .

[188]  T. Albanis,et al.  Spatial and temporal effects of olive mill wastewaters to stream macroinvertebrates and aquatic ecosystems status. , 2011, Water research.

[189]  A. Skordilis,et al.  Polluting characteristics and lime precipitation of olive mill wastewater , 1994 .

[190]  A. Suna Erses Yay,et al.  A study on olive oil mill wastewater management in Turkey: A questionnaire and experimental approach , 2012 .

[191]  V. Cavallaro,et al.  Effects of olive mill wastewater physico-chemical treatments on polyphenol abatement and Italian ryegrass (Lolium multiflorum Lam.) germinability. , 2014, Water research.

[192]  H. Bernhart,et al.  The addition of calcium to reduce the impairment of flocculation by algogenic organic matter , 1986 .

[193]  J. Rouch,et al.  Impact of coagulation conditions on the in-line coagulation/UF process for drinking water production☆ , 2002 .

[194]  V. O’Flaherty,et al.  Bioremediation of olive mill wastewater , 2008 .

[195]  I. P. Marques,et al.  Anaerobic digestion challenge of raw olive mill wastewater. , 2011, Bioresource technology.

[196]  A. R. Binupriya,et al.  Porogen effect on characteristics of banana pith carbon and the sorption of dichlorophenols. , 2008, Journal of colloid and interface science.

[197]  N. Azbar,et al.  Feasibility of physico-chemical treatment and Advanced Oxidation Processes (AOPs) as a means of pretreatment of olive mill effluent (OME) , 2005 .