Effect of ionizing radiation on antioxidant compounds present in cork wastewater

2013 ◽  
Vol 67 (2) ◽  
pp. 374-379 ◽  
Author(s):  
J. Madureira ◽  
R. Melo ◽  
M. L. Botelho ◽  
J. P. Leal ◽  
I. M. Fonseca
Keyword(s):  
Gamma Radiation ◽  
Radiation Effects ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Reducing Power ◽  
Matter Content ◽  
Added Value ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Cooking Water

A preliminary study of the gamma radiation effects on the antioxidant compounds present in cork cooking water was carried out. Radiation studies were performed using radiation between 20 and 50 kGy at 0.4 and 2.4 kGy h−1. The radiation effects on organic matter content were evaluated by chemical oxygen demand. The antioxidant activity was measured by ferric reducing power assay. The total phenolic content was studied using the Folin-Ciocalteau method. Results show that gamma radiation increases both the amount of phenolic compounds and antioxidant capacity of cork cooking water. These results highlight the potential of this technology for increasing the added value of cork waters.

scholarly journals Short investigation on occurrence and removal of semivolatiles during wastewater treatment processes

2021 ◽  
Vol 3 (2) ◽  
pp. 130-140
Author(s):  
Maria Diana Puiu ◽  
Keyword(s):  
Wastewater Treatment ◽  
Organic Contaminants ◽  
Biological Treatment ◽  
Organic Matter Content ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Matter Content ◽  
Physical Treatment ◽  
Dissolved Air Flotation ◽  
Treatment Processes

The food industry wastewater is known to present a high organic matter content, due to specific raw materials and processing activities. Even if these compounds are not directly toxic to the environment, high concentrations in effluents could represent a source of pollution as discharges of high biological oxygen demand may impact receiving river's ecosystems. Identifying the main organic contaminants in wastewater samples represents the first step in establishing the optimum treatment method. The sample analysis for the non-target compounds through the GC-MS technique highlights, along with other analytical parameters, the efficiency of the main physical and biological treatment steps of the middle-size Wastewater Treatment Plant (WWTP). Long-chain fatty acids and their esters were the main abundant classes of non-target identified compounds. The highest intensity detection signal was reached by n-hexadecanoic acid or palmitic acid, a component of palm oil, after the physical treatment processes with dissolved air flotation, and by 1-octadecanol after biological treatment.

scholarly journals Applicability of biological wastewater treatment for various industries

2021 ◽  
Vol 941 (1) ◽  
pp. 012001
Author(s):  
Basamykina Alena ◽  
Kurkina Ekaterina ◽  
Kameristaya Maria
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Matter Content ◽  
Biological Wastewater Treatment ◽  
Aerobic Treatment ◽  
Total Organic Matter ◽  
Inorganic Substances

Abstract Biological treatment methods are used to remove organic and some inorganic substances from wastewater using the simplest organisms that use these substances for nutrition, breaking them down using cellular processes. The article deals with the aerobic, anaerobic and anoxic stages of biological wastewater treatment. Their differences are explained and the best way to use biological processes is analyzed according to the type of industry/production. At wastewater treatment plants, anaerobic treatment is often used at first to remove a significant part of organic substances from wastewater before sending them for further aerobic treatment. Aerobic treatment is effective for various types of wastewater, especially with lower biochemical oxygen demand (BOD) and chemical oxygen demand (COD). A comparative analysis of wastewater composition from food, oil and gas processing, pharmaceutical and pulp and paper industries was carried out. In the presence of organic compounds, the technology is chosen depending on the total organic matter content or the total COD content, which characterizes the total organic matter in water. A combination of anaerobic and aerobic methods is possible, if a discharge into the sewer system or into water bodies is required. The grounds for the application of biological wastewater treatment of these industries are given.

scholarly journals Characterization of the Primary Sludge from Pharmaceutical Industry Effluents and Final Disposition

Processes ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 231 ◽  
Author(s):  
Renata Xavier Alberico Freitas ◽  
Lara Aguiar Borges ◽  
Handray Fernandes de Souza ◽  
Fernando Colen ◽  
Alex Sander Rodrigues Cangussu ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Physicochemical Characteristics ◽  
Matter Content ◽  
Primary Sludge ◽  
Volatile Solids ◽  
Object Of Study ◽  
Final Disposition

The generation of large volumes of waste by industrial processes has become an object of study because of the necessity to characterize the composition of residues in order to suggest appropriate treatments and to minimize adverse environmental impacts. We performed analyses of total fixed and volatile solids, moisture, and chemical oxygen demand (COD). We found high organic matter content. We also measured physicochemical characteristics, including corrosivity, reactivity, and toxicity. Sewage sludge showed levels of chloride and sodium above the maximum allowed limits. These data suggest the potential for anaerobic digestion as a treatment option for sewage sludge and for its use as a biofertilizer.

scholarly journals Antioxidant Capacity of Three Silene Extracts Obtained by Ultrasonication-Assisted Extraction (UAE)

Proceedings ◽  
2019 ◽  
Vol 40 (1) ◽  
pp. 7
Author(s):  
Sengul Uysal
Keyword(s):  
Antioxidant Capacity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
In Vitro Assays ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
High Antioxidant Activity ◽  
Genus Silene ◽  
Silene Species

Many plants with high antioxidant activity are great of significant in the pharmaceutical and cosmetic industries. Oxidative stress plays a major part in the development of many diseases including cancer, which is known imbalance free radicals and antioxidants. Herein, new natural antioxidant compounds have great interest in the scientific research. The genus Silene is a major group in the Caryophyllaceae family. In Turkey, Silene species have been used for several medicinal purposes such as skin softening, asthma, bronchitis. In our study, the antioxidant capacity of three Silene species (S. conoidea, S. dichotoma and S. italica) were evaluated by different in vitro assays, including free radical scavenging, reducing power, metal chelating, and phosphomolybdenum. In addition, total phenolic and flavonoid contents were analyzed spectrophotometrically. The water extracts contained higher total phenolic content than ethyl acetate extracts. All extracts showed antioxidant capacity. This data indicated that Silene species could potentially be used as antioxidant sources in pharmaceutical and cosmetic areas.

scholarly journals Potential of Wastewater Valorization after Wet Extraction of Proteins from Faba Bean and Pea Flours

2020 ◽  
Vol 03 (02) ◽  
pp. 1-1
Author(s):  
Sofía Albolafio ◽  
◽  
María I. Gil ◽  
Ana Allende ◽  
Epameinondas Xanthakis ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Organic Matter ◽  
Environmental Impact ◽  
Faba Bean ◽  
Phenolic Content ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Value Added ◽  
Matter Content ◽  
Two Stages

The present study aimed to characterize wastewater fractions obtained after the wet extraction of proteins from legumes. In addition, the suitability of wastewater fractions for the potential recovery of high value-added compounds was also examined, and consequently, the prevention of the environmental impact of these wastes was explored. Similar to the industrial production of proteins, wet alkaline and acidic extractions of proteins from faba bean and pea flours were performed in two stages of extraction. The different wastewater fractions were characterized by measuring their organic matter content, total solids (TS), total dissolved solids (TDS), electrical conductivity (EC), pH, and turbidity. The value-added compounds from these wastewater fractions were quantified, which included the protein content, carbohydrate content, phenolic content, and antioxidant activity. In addition, the phenolic compounds in these factions were identified and quantified. It was observed that the fractions obtained in the first extraction stage had 60%–90% higher organic matter content, measured as the chemical oxygen demand (COD), compared to the second fractions, indicating a higher environmental impact of the former in case of disposal. The results obtained for COD, TS, TDS, EC, pH, and turbidity demonstrated that microfiltration reduced only the turbidity (85%), and consequently, a decrease was observed in the particulate matter, while there was a practically negligible reduction in the soluble matter. Wastewater from faba exhibited the highest polyphenol content and antioxidant activity, and was, therefore, considered the most valuable fraction for potential valorization.

scholarly journals The Influence of Bottom Sediments and Inoculation with Rhizobacterial Inoculants on the Physiological State of Plants Used in Urban Plantings

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1792 ◽  
Author(s):  
Wyrwicka ◽  
Urbaniak ◽  
Siebielec ◽  
Siebielec ◽  
Chojak-Koźniewska ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Festuca Arundinacea ◽  
Physiological State ◽  
Organic Matter Content ◽  
Matter Content ◽  
Total Soluble Protein ◽  
Favorable Effect ◽  
Total Phenolic ◽  
Toxic Substances ◽  
Tagetes Patula

Bottom sediments accumulate rapidly in urban reservoirs and should be periodically removed. Their high organic matter content makes them valuable fertilizers, but they often contain toxic substances. The present study compares the responses of the dicotyledonous Tagetes patula and monocotyledon Festuca arundinacea to the presence of such sediments in soil and to soil inoculation with two rhizobacterial strains (Massilia niastensis p87 and Streptomyces costaricanus RP92) isolated from contaminated soil. Total soluble protein, total chlorophyll content, as well as chlorophyll a/b ratio, degree of lipid peroxidation (TBARS), α-tocopherol content, total phenolic compounds (TPC) content and anthocyanins content were examined in the leaves of investigated plants. T. patula was more sensitive to the toxic substances in the sediments than F. arundinacea. Rhizobacterial inoculation reduced the toxic effect of the sediment. RP92 has a more favorable effect on the condition of T. patula than p87. F. arundinacea was not adversely affected by the addition of sediments or inoculation with the p87 or RP92 strains. Both tested plant species are suitable for planting on soils enriched with urban sediments, and the addition of bacterial inoculums promote plant growth and reduce the damage caused by the xenobiotics contained in the sediments.

scholarly journals Sequential Extraction of Hydroxytyrosol, Mannitol and Triterpenic Acids Using a Green Optimized Procedure Based on Ultrasound

Antioxidants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1781
Author(s):  
Irene Gómez-Cruz ◽  
María del Mar Contreras ◽  
Inmaculada Romero ◽  
Eulogio Castro
Keyword(s):  
Sequential Extraction ◽  
Morphological Changes ◽  
Reducing Power ◽  
Solid Loading ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Extraction Step ◽  
Triterpenic Acids ◽  
Health Promoting ◽  
Response Optimization

Olive-derived biomasses contain bioactive compounds with health promoting effects as well as antioxidant and sweet-tasting properties. However, their sequential extraction has not been attained. In the present study, firstly antioxidants and mannitol were extracted from exhausted olive pomace (EOP) by an eco-friendly method, ultrasound-assisted water extraction (UAWE). The amplitude (20–80%), extraction time (2–18 min) and solid loading (2–15%, w/v) were evaluated according to a Box–Behnken experimental design. Using the response surface methodology, the optimal conditions for extraction were obtained: 80% amplitude, 11.5% solid loading and 16 min. It enabled the multi-response optimization of the total phenolic content (TPC) (40.04 mg/g EOP), hydroxytyrosol content (6.42 mg/g EOP), mannitol content (50.92 mg/g EOP) and antioxidant activity (ferric reducing power or FRAP, 50.95 mg/g EOP; ABTS, 100.64 mg/g EOP). Moreover, the phenolic profile of the extracts was determined by liquid chromatography-UV and mass spectrometry, identifying hydroxytyrosol as the main phenolic compound and other minor derivatives could be characterized. Scanning electron microscopy was used to analyze the morphological changes produced in the cellular structure of EOP after UAWE. In addition, the chemical composition of the extracted EOP solid was characterized for further valorization. Then, a second extraction step was performed in order to extract bioactive triterpenes from the latter solid. The triterpenes content in the extract was determined and the effect of the previous UAWE step on the triterpenes extraction was evaluated. In this case, the use of ultrasound enhanced the extraction of maslinic acid and oleanolic acid from pelletized EOP with no milling requirement. Overall, UAWE can be applied to obtain antioxidant compounds and mannitol as first extraction step from pelletized EOP while supporting the subsequent recovery of triterpenic acids.

scholarly journals Saccharomyces cerevisiae growth kinetics study dairy byproduct

2013 ◽  
pp. 169-172
Author(s):  
Erika Sulyok ◽  
Györgyi Bró ◽  
János Tamás
Keyword(s):  
Food Industry ◽  
Low Cost ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Optimization Methods ◽  
Matter Content ◽  
Kinetics Study ◽  
Storage Tanks ◽  
Milk Whey ◽  
By Products

By guess, annual volume of milk whey is 185–190 million tons and this volume probably will increase next years. Whey has significant biochemical oxygen demand due to its high organic matter content so whey as sewage is one of the most pollutant by-products in the food industry. Apart from environmental pollution, benefit of several whey constituents for human health is another reason to utilize whey. Corn and potato, as well as the processing of milk in the food industry in large quantities of by-products generated by low cost, substantial quantities of starch and lactic acid, which are due to high biological oxygen demand are considered as hazardous waste. Some of them are destroyed sewage storage tanks, and those products are excellent substrates for the growth of microorganisms could be. The traditional nutrient solution optimization methods are solution and time-consuming and are not able to determine the real optimum because of the interaction of factors involved.

Recovering Ammonium-Nitrogen and Phosphorus through Struvite from Anaerobic Digested Effluent of Poultry Wastewater: Effects of Reagent Ratio and pH

2012 ◽  
Vol 433-440 ◽  
pp. 1253-1259 ◽  
Author(s):  
Hong Rui Yang ◽  
Ya Lei Zhang ◽  
Ue Fei Zhou ◽  
Hong Guang Zhu
Keyword(s):  
Organic Matter Content ◽  
Oxygen Demand ◽  
High Strength ◽  
Ammonium Nitrogen ◽  
Matter Content ◽  
Molar Ratio ◽  
Optimum Conditions ◽  
Nitrogen And Phosphorus ◽  
Poultry Breeding ◽  
Poultry Wastewater

Fermentation wastewater generated from livestock and poultry breeding contains high strength of ammonium-nitrogen and phosphorus, which has the huge nutrient recovery value. To recover nitrogen and phosphorus from the fermentation wastewater, struvite precipitate is a promising option. This paper focused on the ratios of reagent adding and pH optimizing during the ammonium and phosphate recycling through struvite precipitate. Using MgCl•6H2O and NaHPO4•12H2O as precipitants, the optimum conditions were discussed in the paper. The results indicated that during a reaction time of 30min and a mixed speed of 100r/min , the ammonium and phosphate were removed by 89% and 88.7%, respectively at pH 10.5 and a molar ratio of Mg:N:P=1.2:1:1. In addition, it could reduce the organic matter content with a COD(Chemical Oxygen Demand ) removal efficiency of 36.2%. The recovered struvite had been suggested to display excellent fertilizer qualities, and also could be recycled and reused as a resource of nitrogen and phosphorus.

scholarly journals Valuable product production from wood mill effluents

2010 ◽  
Vol 62 (10) ◽  
pp. 2294-2300 ◽  
Author(s):  
T. Mato ◽  
M. Ben ◽  
C. Kennes ◽  
M. C. Veiga
Keyword(s):  
Organic Matter ◽  
Volatile Fatty Acids ◽  
Batch Reactor ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Matter Content ◽  
Valuable Product ◽  
High Chemical Oxygen Demand ◽  
Complex Organic ◽  
Aerobic And Anaerobic

Fibreboard production is one of the most important industrial activities in Galicia (Spain). Great amounts of wastewater are generated, with properties depending on the type of wood, treatment process, final product and water reusing, among others. These effluents are characterized by a high chemical oxygen demand (COD), low pH and nutrients limitation. Aerobic and anaerobic processes have been used for their treatment. Presently, bioplastics production (mainly polyhydroxyalkanoates or PHA) from wastewaters with mixed cultures is being studied. Substrate requirements for these processes are a high organic matter content and low nutrient concentration. Therefore, wood mill effluents could be a suitable feedstock. PHA production from wastewaters is carried out in three steps. First, complex organic matter is converted into volatile fatty acids (VFA) through acidogenic fermentation. Then, VFA are used as substrate in an aerobic sequencing batch reactor (SBR), in which the enrichement of PHA producing bacteria from a mixed culture is favoured. Finally, the sludge from the SBR is fed with a pulse containing high VFA concentrations, resulting in PHA accumulation inside the cells. In this work, the possibility of applying this process to wood mill effluents is proposed. An acidification percentage of 37% and a storage yield (YSTO) of 0.23 Cmmol/Cmmol were obtained.

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