scholarly journals Microbial Application to Improve Olive Mill Wastewater Phenolic Extracts

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1944
Author(s):  
Flora V. Romeo ◽  
Gina Granuzzo ◽  
Paola Foti ◽  
Gabriele Ballistreri ◽  
Cinzia Caggia ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Olive Mill Wastewater ◽  
Health Claims ◽  
Total Phenols ◽  
Wickerhamomyces Anomalus ◽  
Phenolic Extract ◽  
Beta Glucosidase ◽  
Commercial Adsorbent ◽  
Olive Mill ◽  
Phenolic Extracts

Olive mill wastewater (OMW) contains valuable and interesting bioactive compounds, among which is hydroxytyrosol, which is characterized by a remarkable antioxidant activity. Due to the health claims related to olive polyphenols, the aim of this study was to obtain an extract from OMW with an increased level of hydroxytyrosol by means of microbial enzymatic activity. For this purpose, four commercial adsorbent resins were selected and tested. The beta-glucosidase and esterase activity of strains of Wickerhamomyces anomalus, Lactiplantibacillus plantarum, and Saccharomyces cerevisiae were also investigated and compared to those of a commercial enzyme and an Aspergillus niger strain. The W. anomalus strain showed the best enzymatic performances. The SP207 resin showed the best efficiency in selective recovery of hydroxytyrosol, tyrosol, oleuropein, and total phenols. The bioconversion test of the OMW extract was assessed by using both culture broths and pellets of the tested strains. The results demonstrated that the pellets of W. anomalus and L. plantarum were the most effective in hydroxytyrosol increasing in phenolic extract. The interesting results suggest the possibility to study new formulations of OMW phenolic extracts with multifunctional microorganisms.

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.

Treatment of olive mill wastewater by chemical processes: effect of acid cracking pretreatment

2014 ◽  
Vol 69 (7) ◽  
pp. 1453-1461 ◽  
Author(s):  
B. Hande Gursoy-Haksevenler ◽  
Idil Arslan-Alaton
Keyword(s):  
Acute Toxicity ◽  
Chemical Treatment ◽  
Suspended Solids ◽  
Olive Mill Wastewater ◽  
Wastewater Sample ◽  
Fenton’S Reagent ◽  
Total Phenols ◽  
Fenton's Reagent ◽  
Treatment Processes ◽  
Olive Mill

The effect of acid cracking (pH 2.0; T 70 °C) and filtration as a pretreatment step on the chemical treatability of olive mill wastewater (chemical oxygen demand (COD) 150,000 m/L; total organic carbon (TOC) 36,000 mg/L; oil–grease 8,200 mg/L; total phenols 3,800 mg/L) was investigated. FeCl3 coagulation, Ca(OH)2 precipitation, electrocoagulation using stainless steel electrodes and the Fenton's reagent were applied as chemical treatment methods. Removal performances were examined in terms of COD, TOC, oil–grease, total phenols, colour, suspended solids and acute toxicity with the photobacterium Vibrio fischeri. Significant oil–grease (95%) and suspended solids (96%) accompanied with 58% COD, 43% TOC, 39% total phenols and 80% colour removals were obtained by acid cracking-filtration pretreatment. Among the investigated chemical treatment processes, electrocoagulation and the Fenton's reagent were found more effective after pretreatment, especially in terms of total phenols removal. Total phenols removal increased from 39 to 72% when pretreatment was applied, while no significant additional (≈10–15%) COD and TOC removals were obtained when acid cracking was coupled with chemical treatment. The acute toxicity of the original olive mill wastewater sample increased considerably after pretreatment from 75 to 89% (measured for the 10-fold diluted wastewater sample). An operating cost analysis was also performed for the selected chemical treatment processes.

scholarly journals Extraction of phenolic compounds from Iraqi Coriandrum Sativum L. and loaded on copolymeric hydrogels and examine there as drug delivery system and antioxidant

2021 ◽  
Vol 2063 (1) ◽  
pp. 012001
Author(s):  
Ula Ali Sadoun ◽  
Zainab Shakir Al-Ali ◽  
Athir Mahmood Haddad
Keyword(s):  
Drug Delivery ◽  
Phenolic Compounds ◽  
Drug Delivery System ◽  
Delivery System ◽  
Coriandrum Sativum ◽  
Total Flavonoids ◽  
Distilled Water ◽  
Total Phenols ◽  
Phenolic Extract ◽  
Phenolic Extracts

Abstract The phenolic extracts for leaves and stems (L+S) parts and leaves (L) part of Iraqi Coriandrum Sativum L. and their total phenols, total tannins and total flavonoids are described. Three copolymeric hydrogels prepared and loaded with phenolic extract 4 (U1-U3). The HPLC results show three phenolic compounds, while the GC-Mass results show one phenolic compound and four non-phenolic compounds. Gained results showed that there are significant (P < 0.05) variations in total phenols (9.822 ± 0.634−4.015 ± 0.118 mg GAE/g DW), total flavonoids (8.112 ± 0.115−2.811 ± 0.371 mg QE/g DW) and total condensed tannin (4.245 ± 0.276−1.135 ± 0.091 mg QE/g DW) contents for all phenolic extracts. The swelling rate for (U1-U3) in distilled water, the SGF, and the SIF was estimated. The maximum swelling was observed in copolymeric hydrogels at pH 6.9 in distilled water. The IC50 values of radical scavenging activity of the phenolic extracts 4, 8 and phenolic extract 4 released from copolymeric hydrogels (U1-U3) show varied significantly (P < 0.05). Our results indicated that Iraqi Coriandrum Sativum L. could constitute a rich and novel source of natural antioxidants. When it loaded on, copolymeric hydrogels could be used as a drug delivery system.

Removal of total phenols from olive-mill wastewater using an agricultural by-product, olive pomace

2008 ◽  
Vol 160 (2-3) ◽  
pp. 408-413 ◽  
Author(s):  
Athanasios S. Stasinakis ◽  
Irene Elia ◽  
Anastasios V. Petalas ◽  
Constantinos P. Halvadakis
Keyword(s):  
Olive Mill Wastewater ◽  
Total Phenols ◽  
Olive Pomace ◽  
Olive Mill

scholarly journals Technoeconomic Analysis of the Recovery of Phenols from Olive Mill Wastewater through Membrane Filtration and Resin Adsorption/Desorption

2021 ◽  
Vol 13 (4) ◽  
pp. 2376
Author(s):  
Dimitris P. Zagklis ◽  
Costas S. Papageorgiou ◽  
Christakis A. Paraskeva
Keyword(s):  
Capital Investment ◽  
Membrane Filtration ◽  
Hot Spot ◽  
Treatment Method ◽  
Olive Mill Wastewater ◽  
Operational Cost ◽  
Equipment Cost ◽  
Fixed Capital Investment ◽  
Adsorption Desorption ◽  
Olive Mill

Olive mill wastewater is an important agro-industrial waste with no established treatment method. The authors have developed a phenol separation method that could potentially cover the treatment cost of the waste. The purpose of this study was to identify any economic hotspots in the process, the operational cost and examine the margin of profit for such a process. The equipment cost was scaled for different treatment capacities and then used to estimate the fixed capital investment and the yearly operational cost. The highest purchased equipment cost was identified for the membrane filtration system, while the cost for resin replacement was identified as the highest operational cost. The lifespan of the resin used in the adsorption step was identified as an economic hot spot for the process, with the phenols separation cost ranging from 0.84 to 13.6 €/g of phenols for a resin lifespan of 5–100 adsorption/desorption cycles. The lifespan of the resin proved to be the single most important aspect that determines the phenols separation cost. The price range that was calculated for the product of the process is very promising because of the typical value of antioxidants and the low concentration of phenols that are needed for food supplements and cosmetics.

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