scholarly journals Low-Cost Catalysts To Enhance Ozone Action on the Depuration of Olive Mill Wastewaters

2014 ◽  
Vol 53 (40) ◽  
pp. 15357-15368 ◽  
Author(s):  
Rui C. Martins ◽  
Carina M. Ramos ◽  
Rosa M. Quinta-Ferreira
Keyword(s):  
Low Cost ◽  
Olive Mill Wastewaters ◽  
Olive Mill

scholarly journals Eco-friendly approach for elimination of olive mill wastewaters (OMW) toxicity using cactus prickly pears juice as a coagulant

2020 ◽  
Vol 15 (4) ◽  
pp. 1050-1067
Author(s):  
M. Neffa ◽  
M. Taourirte ◽  
N. Ouazzani ◽  
H. Hanine
Keyword(s):  
Low Cost ◽  
Mixing Time ◽  
Oxygen Demand ◽  
Physicochemical Analysis ◽  
Jar Test ◽  
Coagulation Mechanism ◽  
Olive Mill Wastewaters ◽  
Series Of Experiments ◽  
Prickly Pears ◽  
Olive Mill

Abstract Currently, research focuses on the application of newer biocoagulant products in wastewater treatment. In this study, the performance of cactus juice to clarify Olive Mill Wastewater (OMW) was investigated by using Jar-test experimentation and assessed by physicochemical analysis of the obtained supernatant: turbidity, total suspended solids (TSS), (λ465; λ395) absorbance, polyphenols (pp), chemical oxygen demand (COD) and Fourier-Transform-Infrared spectroscopy (FTIR) on lyophilized sludge. A series of experiments were conducted to estimate the influence of various experimental parameters, such as the amounts of biocoagulants used, time, stirring speed, and pH. The study showed the optimal coagulation conditions were as follows: sample pH10; cactus juice dose, 10% (v/v); rapid mixing time, 30 s at a speed of 150 rp/min. Under these conditions, the overall removals of 74% for COD, 93% for turbidity and 51% for polyphenols were achieved. As referring to the FTIR analysis, the cactus juice of Opuntia spp. operates predominantly through an adsorption interparticle bridging coagulation mechanism. These results are encouraging in the context of developing a low-cost technology and eco-friendly approach for the effective management of OMW.

scholarly journals Burkholderia thailandensis E264 as a promising safe rhamnolipids’ producer towards a sustainable valorization of grape marcs and olive mill pomace

2021 ◽  
Author(s):  
Alif Chebbi ◽  
Massimiliano Tazzari ◽  
Cristiana Rizzi ◽  
Franco Hernan Gomez Tovar ◽  
Sara Villa ◽  
...  
Keyword(s):  
Energy Source ◽  
Olive Oil ◽  
Low Cost ◽  
Carbon Sources ◽  
Burkholderia Thailandensis ◽  
Rhamnolipid Production ◽  
Key Points ◽  
Wide Range ◽  
Long Chain ◽  
Olive Mill

Abstract Within the circular economy framework, our study aims to assess the rhamnolipid production from winery and olive oil residues as low-cost carbon sources by nonpathogenic strains. After evaluating various agricultural residues from those two sectors, Burkholderia thailandensis E264 was found to use the raw soluble fraction of nonfermented (white) grape marcs (NF), as the sole carbon and energy source, and simultaneously, reducing the surface tension to around 35 mN/m. Interestingly, this strain showed a rhamnolipid production up to 1070 mg/L (13.37 mg/g of NF), with a higher purity, on those grape marcs, predominately Rha-Rha C14-C14, in MSM medium. On olive oil residues, the rhamnolipid yield of using olive mill pomace (OMP) at 2% (w/v) was around 300 mg/L (15 mg/g of OMP) with a similar CMC of 500 mg/L. To the best of our knowledge, our study indicated for the first time that a nonpathogenic bacterium is able to produce long-chain rhamnolipids in MSM medium supplemented with winery residues, as sole carbon and energy source. Key points • Winery and olive oil residues are used for producing long-chain rhamnolipids (RLs). • Both higher RL yields and purity were obtained on nonfermented grape marcs as substrates. • Long-chain RLs revealed stabilities over a wide range of pH, temperatures, and salinities

scholarly journals Screening of low-cost materials as heterogeneous catalysts for olive mill wastewater Fenton’s peroxidation

2020 ◽  
Vol 6 ◽  
pp. 161-167
Author(s):  
E. Domingues ◽  
F. Rodrigues ◽  
J. Gomes ◽  
M.J. Quina ◽  
S. Castro-Silva ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Low Cost ◽  
Olive Mill Wastewater ◽  
Olive Mill

scholarly journals Bioconversion of p-Tyrosol into Hydroxytyrosol under Bench-Scale Fermentation

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Zouhaier Bouallagui ◽  
Sami Sayadi
Keyword(s):  
Experimental Design ◽  
Dry Matter ◽  
Specific Productivity ◽  
Bench Scale ◽  
Olive Mill Wastewaters ◽  
Rich Solution ◽  
Olive Mill

Tyrosol hydroxylating Pseudomonas strain was previously isolated from olive mill wastewaters-irrigated soil. In the present work, experimental design was used to study the bioconversion of tyrosol in laboratory fermenters aiming at the recovery of the highest yields of hydroxytyrosol. The effects of biocatalyst loading and tyrosol concentration were studied. The bioconversion yield reached 86.9% (37.3 mM hydroxytyrosol) starting from a tyrosol concentration of 43 mM. Under these conditions, the specific productivity relative to the biocatalyst was 4.78 μM/min/g. The established model to predict bioconversion yield was validated in two bench-scale fermenters. At the downstream stage, the reaction product was recovered as a hydroxytyrosol rich solution after microfiltration and concentration under vacuum. Subsequent to this operation, hydroxytyrosol composition yielded 73.8% of the total dry matter.

Bioremediation of Olive-Mill Wastewaters By Composting

1995 ◽  
Vol 13 (6) ◽  
pp. 509-518 ◽  
Author(s):  
U. Tomati ◽  
E. Galli ◽  
L. Pasetti ◽  
E. Volterra
Keyword(s):  
Olive Mill Wastewaters ◽  
Olive Mill

Olive-mill wastewaters: a promising substrate for microbial lipase production

2006 ◽  
Vol 97 (15) ◽  
pp. 1828-1833 ◽  
Author(s):  
Alessandro D’Annibale ◽  
Giovanni Giovannozzi Sermanni ◽  
Federico Federici ◽  
Maurizio Petruccioli
Keyword(s):  
Lipase Production ◽  
Microbial Lipase ◽  
Olive Mill Wastewaters ◽  
Olive Mill

Polyphenolic characterization of olive mill wastewaters, coming from Italian and Greek olive cultivars, after membrane technology

2014 ◽  
Vol 65 ◽  
pp. 301-310 ◽  
Author(s):  
Isabella D'Antuono ◽  
Vassiliki G. Kontogianni ◽  
Kali Kotsiou ◽  
Vito Linsalata ◽  
Antonio F. Logrieco ◽  
...  
Keyword(s):  
Membrane Technology ◽  
Olive Mill Wastewaters ◽  
Olive Cultivars ◽  
Olive Mill

Cleaning of olive mill wastewaters by visible light activated carbon doped titanium dioxide

RSC Advances ◽  
2015 ◽  
Vol 5 (104) ◽  
pp. 85586-85591 ◽  
Author(s):  
Francesca Cuomo ◽  
Francesco Venditti ◽  
Andrea Ceglie ◽  
Antonella De Leonardis ◽  
Vincenzo Macciola ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Activated Carbon ◽  
Visible Light ◽  
Olive Mill Wastewater ◽  
Total Phenols ◽  
Carbon Doped ◽  
Olive Mill Wastewaters ◽  
Doped Titanium Dioxide ◽  
Olive Mill

Visible light activated carbon doped titanium dioxide fully works in the removal of total phenols from olive mill wastewater.

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