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Garcia-Gonzalez M.C.,Agricultural Technological Institute of Castilla and Leon ITACyL | Riano B.,Agricultural Technological Institute of Castilla and Leon ITACyL | Teresa M.,Aragon Company of Agri environmental Management S.L.U. SARGA | Herrero E.,Aragon Company of Agri environmental Management S.L.U. SARGA | And 8 more authors.
Scientia Agricola | Year: 2016

In this study, eight different manure treatment plants were monitored. The plants were four on-farm and four centralized treatment plants, all of them at full-scale level. Assess­ment includes a total of seven pre-treatment and process units as follows: mechanical separa­tion, with and without coagulant and flocculant addition, pasteurization, nitrification-denitrification, anaerobic digestion, and composting. The plants are located in nutrient surplus areas of three European Member States (Spain, Italy and Denmark), the majority of these areas being Nitrate Vulnerable Zones (NVZ). Results presented herein are data collected over a six-month period and comprise performance data of the treatment plants, pathogen indicators (E.coli and Salmonella) and greenhouse gas (GHG) emissions data under two scenarios: 1) the baseline scenario and 2) the treatment plant scenario. The assessment includes GHG emissions of the storage facilities, transportation, and subsequent intermediate storage, electric consumption, electric production, composting, and land application. All treatment plants studied generated a significant reduc­tion in GHG emissions (between 53 and 90 %) in comparison to the baseline scenario. Organic matter and total solids (TS) content in manure were also greatly reduced, with values ranging between 35-53 % of chemical oxygen demand (COD) and, 24-61 % of TS for anaerobic digestion (AD) treatment plants, 77-93 % COD and 70 % TS in the case of AD combined with nitrogen (N)- removal unit plants. Nitrogen concentrations were also greatly reduced (between 65-85 %) total Kjeldahl nitrogen (TKN) and 68-83 % ammonium (NH4 +-N)) in plants with N-removal units. © 2016, Scientia Agricola. All rights reserved.


Ahmed L.,Dublin Institute of Technology | Martin-Diana A.B.,Agricultural Technological Institute of Castilla and Leon ITACYL | Rico D.,Agricultural Technological Institute of Castilla and Leon ITACYL | Barry-Ryan C.,Dublin Institute of Technology
International Journal of Food Science and Technology | Year: 2012

The aim of this study was to investigate the effect of delactosed whey permeate (DWP) treatment on antioxidant and physicochemical properties of strawberries. Fresh strawberries treated with 3% DWP were analysed for different quality, nutritional and microbiological markers during 10days of storage at 5°C. The results showed that DWP treatment significantly reduced incidences of decay (70%) and numbers of total aerobic counts (~1.4 Log 10CFUg -1) and yeast and moulds (~1.8 Log 10CFUg -1). DWP treatment also inhibited the loss of firmness (15%) and maintained significantly (P≤0.05) higher levels of vitamin C, total phenols and antioxidant activity of strawberries. Sensory scores confirmed that the DWP-treated strawberries retained a good appearance and overall quality. The aroma and colour attributes were not reduced during storage. These results suggest that DWP treatment has potential to extend the shelf-life and maintain the quality of strawberries during storage. © 2012 Institute of Food Science and Technology.


Ahmed L.,Dublin Institute of Technology | Patras A.,University of Guelph | Martin-Diana A.B.,Agricultural Technological Institute of Castilla and Leon ITACYL | Rico D.,Agricultural Technological Institute of Castilla and Leon ITACYL | Barry-Ryan C.,Dublin Institute of Technology
Food Chemistry | Year: 2012

The effect of delactosed whey permeate (DWP) treatment on antioxidant and phyto-chemical components of canned Irish plum tomatoes were investigated. Tomatoes were sterilised for 5 min (F0) at 120 °C and stored for 6 months. The DWP treatment retained significantly (p < 0.05) higher levels of ascorbic acid and lycopene of tomatoes. The antioxidant activity of DWP treated tomatoes was higher (7%) than the control at the end of storage. The firmness in DWP-treated fruits was around 40% higher than that in control. All the parameters decreased significantly (p < 0.05) during storage except lycopene and total phenols. Lycopene content showed no significant change and total phenols increased during storage. The changes in ascorbic acid, antioxidant activity and texture were fitted well to Weibull kinetic models with high coefficients of determination (R2) and low RMSE (root mean sum of squared error). The results clearly indicate that DWP enhanced the retention of antioxidant compounds in tomatoes during storage. © 2012 Elsevier Ltd. All rights reserved.

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