scholarly journals Degradation of recalcitrant organic polluants in seafood wastewater by modified TiO2 photocatalysts

2017 ◽  
Vol 1 (T4) ◽  
pp. 241-248
Author(s):  
Loc Cam Luu ◽  
Da Linh Ho ◽  
Phu Chi Hoang ◽  
Tri Nguyen ◽  
Van Thi Thuy Nguyen ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Discharge ◽  
Pure Tio2 ◽  
Reaction Conditions ◽  
Tio2 Photocatalysts ◽  
Processing Plants ◽  
Seafood Processing ◽  
The Relationship

In seafood processing plants, industrial waste water discharge reached virtually the level B (QCVN 11-MT:2015/BTNMT) after using mechanical, physicochemical and biological wastewater treatment methods. However, their COD values (COD = 20-120 mg/L) were not qualified for allowable concentration of discharge requirement - level A (COD ≤ 75 mg/L) in many cases. In this paper, bio-treated seafood waster water was continually treated by TiO2 photocatalyst modified by doping Fe and N to degrade recalcitrant organic pollutants to obtain the A level water which can be resused. TiO2 modified by doping Fe and N were prepared and investigated the physico-chemicalproperties. The results showed that modified TiO2 had a lower band gap and more photoactivity than pure TiO2. Beside that, at the reaction conditions: reaction temperature 25 oC, dissolved oxygen concentration 7.6 mg/L and pH = 7, the optimal concentration of catalysts was determined (1.25 g/L). After 12 hours of treatment, COD removal efficiency on TiO2-Fe and TiO2-N catalysts attained 41.1 % and 64.3 %, respectively, and their COD values reached 49.3 and 29.9 mg/L, correspondingly. After treatment, the quality of waste water discharge met the level A (QCVN 11-MT:2015/BTNMT) and became a safety source for reusing (QCVN 08-MT:2015/BTNMT). In addition, the relationship between the characterization of modifed TiO2 and their activity was characterized.

Relationship between Listeria monocytogenes and Listeria spp. in Seafood Processing Plants

2013 ◽  
Vol 76 (7) ◽  
pp. 1279-1282 ◽  
Author(s):  
WALID Q. ALALI ◽  
DONALD W. SCHAFFNER
Keyword(s):  
Listeria Monocytogenes ◽  
Raw Materials ◽  
Food Products ◽  
Published Data ◽  
Food Contact ◽  
Food Contact Surfaces ◽  
Processing Plants ◽  
Contact Surfaces ◽  
Seafood Processing ◽  
The Relationship

The objective of this study was to evaluate the relationship between prevalence of Listeria monocytogenes as an outcome and Listeria spp. as an explanatory variable by food products, food contact surfaces, and nonfood contact surfaces in seafood processing plants by using peer-reviewed published data. Nine sets of prevalence data of L. monocytogenes and Listeria spp. were collected from published studies and used for the analyses. Based on our analysis, the relationship between L. monocytogenes prevalence and Listeria spp. prevalence in food products (incoming raw materials and finish products) was significant (P = 0.04) with (low) R2 = 0.36. Furthermore, Listeria spp. were not a good indicator for L. monocytogenes when testing food contact surfaces (R2= 0.10). Listeria spp. were a good indicator for L. monocytogenes only on nonfood contact surfaces (R2= 0.90). On the other hand, the presence of Listeria spp. on food contact surfaces (R2= 0.002) and nonfood contact surfaces (R2= 0.03) was not a good indicator for L. monocytogenes presence in food products. In general, prevalence of Listeria spp. does not seem to be a good indicator for L. monocytogenes prevalence in seafood processing plants.

Characterization of Vibrio parahaemolyticus strains isolated from clinically asymptomatic seafood workers

2020 ◽  
Author(s):  
Kaknokrat Chonsin ◽  
Neunghatai Supha ◽  
Chie Nakajima ◽  
Yasuhiko Suzuki ◽  
Orasa Suthienkul
Keyword(s):  
Phylogenetic Analysis ◽  
Food Safety ◽  
Vibrio Parahaemolyticus ◽  
Environmental Samples ◽  
Genetic Characterization ◽  
Processing Plants ◽  
Pandemic Strains ◽  
Phenotypic And Genetic Characterization ◽  
Seafood Processing

Abstract Vibrio parahaemolyticus (VP) is a major cause of gastroenteritis outbreaks in Thailand and other countries due to the consumption of contaminated and undercooked seafood. However, there have been few reports of the molecular epidemiology of VP isolates from asymptomatic seafood handlers. Here, we report the phenotypic and genetic characterization of 61 VP isolates obtained from asymptomatic workers in two seafood processing plants. We found 24 O:K serotypes of which O11:KUT, O1:KUT and O3:KUT were the dominant serotypes. Analysis by PCR showed 12 isolates harbored either tdh or trh genes with the potential to be pathogenic VP strains. The presence of T3SS2α and T3SS2β genes was correlated with the presence of tdh and trh, respectively. Four tdh+ isolates were positive for pandemic marker. In this study, VP isolates were commonly resistant to ampicillin, cephazolin, fosfomycin and novobiocin. Phylogenetic analysis of VP1680 loci in 35 isolates from 17 asymptomatic workers, six gastroenteritis patients, seven environmental samples and five genomes from a database showed 22 different alleles. Gene VP1680 was conserved in tdh+ isolates and pandemic strains, that of trh + isolates was diverse. Asymptomatic workers carrying VP were the most likely source of contamination, which raises concerns over food safety in seafood processing plants.

scholarly journals Fundamental Perceptual Characterization of an Integrated Tactile Display with Electrovibration and Electrical Stimuli

Micromachines ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 301 ◽  
Author(s):  
Seiya Komurasaki ◽  
Hiroyuki Kajimoto ◽  
Hiroki Ishizuka
Keyword(s):  
Single Stimulus ◽  
Tactile Display ◽  
Micro Fabrication ◽  
Tactile Displays ◽  
Tactile Stimuli ◽  
Friction Pressure ◽  
Electrical Stimuli ◽  
The Relationship

Tactile displays have been widely studied for many decades. Although multiple tactile stimuli are more effective to improve the quality of the presented tactile sensation, most tactile displays provide a single tactile stimulus. An integrated tactile display with electrovibration and electrical stimuli is proposed herein. It is expected that vibrational friction, pressure and vibration can be presented at the same time through the tactile display. Also, these stimuli only require electrodes for stimulation. Therefore, the tactile display can be easily miniaturized and densely arrayed on a substrate. In this study, a tactile display is designed and fabricated using the micro-fabrication process. Furthermore, the display is evaluated. First, the relationship between a single stimulus and the perception is investigated. The electrovibration and electrical stimuli have a frequency dependence on perception. Second, whether the multiple stimuli with the electrovibration and electrical stimuli are perceivable by the subjects is also evaluated. The results indicate that the multiple tactile stimuli are perceivable by the subjects. Also, the possibility that the electrovibration and electrical stimuli affect each other is confirmed.

The Relationship Between Mineral Content and Flocculant Characteristics for Slurry Waste Water Recycling at Marble Processing Plants

2015 ◽  
Vol 35 (3) ◽  
pp. 332-336 ◽  
Author(s):  
Diler Katircioglu Bayel ◽  
Zeki Karaca ◽  
Vildan Onen ◽  
Ahmet Hamdi Deliormanli
Keyword(s):  
Waste Water ◽  
Mineral Content ◽  
Water Recycling ◽  
Processing Plants ◽  
The Relationship

scholarly journals A Technique of the Ore-mining and Processing Plant Waste Water Treatment

2015 ◽  
pp. 98-106
Author(s):  
Keyword(s):  
Waste Water ◽  
Waste Water Treatment ◽  
Water Bodies ◽  
Adverse Impact ◽  
Processing Plant ◽  
Waste Waters ◽  
Quality Of Water ◽  
Plant Waste ◽  
Processing Plants

A technique for mining/processing plants waste waters treatment has been presented. The proposed solution is based on separate processing of wastes different by the composition with the use of increased quantities of an alkalizating agent. This technique use will enable to improve the quality of water discharged in water bodies up to MPC and to decrease the waste waters adverse impact upon water bodies.

scholarly journals Microbiological Quality of Raw Shrimps Processed in Seafood Processing Plants of Tuticorin, Tamil Nadu, India

2002 ◽  
Vol 15 (1) ◽  
Author(s):  
M. MICHAEL ANTONY ◽  
G. JEYASEKARAN ◽  
R. JEYA SHAKILA ◽  
S.A. SHANMUGAM
Keyword(s):  
Tamil Nadu ◽  
Microbiological Quality ◽  
Processing Plants ◽  
Seafood Processing

Effects of calcination variables on quicklime yield of Nkalagu limestone

2021 ◽  
Vol 1 (2) ◽  
pp. 012-023
Author(s):  
Benson Chinweuba Udeh ◽  
Chidinma Lovelyn Ani ◽  
Monday Omotioma
Keyword(s):  
Particle Size ◽  
Mineralogical Composition ◽  
Operating Conditions ◽  
Quadratic Model ◽  
Calcination Process ◽  
Plant Equipment ◽  
The Relationship ◽  
Central Composite

Calcination of Nkalagu limestone for the production of agricultural quicklime is presented. It entails improving the quality of limestone through calcination process. Appropriate scientific instruments/techniques (x-ray diffractometer and scanning electron microscopy) were used for the characterization of the uncalcined and calcined limestone samples. Effects of calcination variables on the quicklime yield were examined. Central composite design of design expert software was used to optimize the calcination process. Analyses of the results revealed that calcite was the major limestone’s mineralogical composition. Quadratic model adequately described the relationship between quicklime yield and calcination factors of temperature, particle size and time. Quadratic model adequately described the relationship between quicklime yield and calcination factors of temperature, particle size and time. The optimum yield of 74.00% was obtained at optima operating conditions; temperature of 937.41 0C, particle size of 85.99µm and time of 3.7 hrs. Characteristics of the quicklime showed that the calcination improved the quality of the sample in terms of mineralogical properties. It is recommended that the generated model should be used to develop chemical plant/equipment for limestone calcination process.

scholarly journals Microbiological Quality of Raw Shrimps Processed in Seafood Processing Plants of Tuticorin, Tamilnadu, India

2002 ◽  
Vol 15 (4) ◽  
Author(s):  
M.M. ANTHONY ◽  
G. JEYASEKARAN ◽  
R. JEYASHAKILA ◽  
S.A. SHANMUGAM
Keyword(s):  
Microbiological Quality ◽  
Processing Plants ◽  
Seafood Processing

Recent Development of Membrane Processes for Water and Waste Water Treatment

1993 ◽  
Vol 27 (10) ◽  
pp. 141-149 ◽  
Author(s):  
R. Ben Aim ◽  
M. G. Liu ◽  
S. Vigneswaran
Keyword(s):  
Waste Water ◽  
Experimental Study ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Operating Conditions ◽  
Water Disinfection ◽  
Simultaneous Optimization ◽  
Membrane Processes ◽  
The Relationship

Membranes are presently used at industrial scale for water and waste water treatment, but still for limited production. More knowledge of hydrodynamic phenomena has recently resulted in significant technical improvements (backflush, unsteady flow). However an experimental study performed at lab scale in a rotating membrane device has shown the complexity of the relationship between operating conditions, rejection and filtrate flux. The need for bettering the quality of the water (low turbidity) and waster water (disinfection) may be in favour of the development of membrane processes if efficient models allowing simultaneous optimization of quality and productivity are made available (as was done years ago for deep bed filtration).

scholarly journals Home-Delivered Meals: Characterization of Food Intake in Elderly Beneficiaries

Nutrients ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 2064
Author(s):  
Ségolène Fleury ◽  
Virginie Van Wymelbeke-Delannoy ◽  
Bruno Lesourd ◽  
Paul Tronchon ◽  
Isabelle Maître ◽  
...  
Keyword(s):  
Home Delivery ◽  
Nutritional Intake ◽  
Dietary Survey ◽  
Nutritional Recommendations ◽  
Home Interview ◽  
Single Meal ◽  
Meal Service ◽  
The Relationship

Objective. In this study, we focus on elderly people (≥70 years old) benefiting from a home delivery meal service as part of a social welfare program. We aimed to: (i) assess the gap between the recommended and actual nutritional intake in this population and (ii) study the relationship between the intake of nutrients and the variables characterizing the participants’ health and nutritional status. Design. A dietary survey (24-hour record) was conducted during a home interview, with 64 people receiving a home delivery meal service (75% women; 70–97 years old). At the same time, the participants answered questionnaires assessing their nutritional and health status. Results. Our data showed that the consumption of 70 to 80% participants was not sufficient for reaching the nutritional recommendations for energy and macronutrients. Additionally, the data showed that the lower the energy and protein intakes, the higher the risk of malnutrition. In addition, one third of the participants were both overweight or obese and at risk of undernutrition or undernourished. Our study demonstrated that the heavier the person, the more difficult it was for them to meet the nutritional recommendations based on kilograms of body weight. Finally, individuals receiving two to three delivered meals per day had higher energy and protein intakes than those receiving a single meal. Conclusion. These results suggest that it is important that home meal delivery companies improve the quality of their meals and service so that their recipients can better meet nutritional recommendations.

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