Pilot-scale generation of plasma processed air and its influence on microbial count, microbial diversity, and selected quality parameters of dried herbs

2022 ◽  
Vol 75 ◽  
pp. 102890
Author(s):  
Julia Durek ◽  
Antje Fröhling ◽  
Sara Bußler ◽  
Andreas Hase ◽  
Jörg Ehlbeck ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Pilot Scale ◽  
Quality Parameters ◽  
Microbial Count

Coagulation-Direct Filtration of Soft, Low Alkalinity Humic Waters

1999 ◽  
Vol 40 (9) ◽  
pp. 55-62 ◽  
Author(s):  
Bjørnar Eikebrokk
Keyword(s):  
Natural Organic Matter ◽  
Pilot Scale ◽  
Quality Parameters ◽  
Efficient Removal ◽  
Direct Filtration ◽  
Ph Values ◽  
Optimum Ph ◽  
Calcium Sources ◽  
Ph Conditions ◽  
Removal Efficiencies

Optimisation of coagulation-direct filtration processes with respect to efficient removal of humic substances, i.e. natural organic matter (NOM) has gained a lot of focus in many countries over the last years. This paper presents experimental results from pilot scale research studies aimed at optimising the coagulation-direct filtration process applied to soft and humic raw waters with low turbidity and alkalinity levels. Comprehensive tests of 3 types of raw waters with different NOM content, 5 types of coagulants, and 3 calcium sources for the purpose of corrosion control have been conducted. Removal efficiencies with respect to relevant water quality parameters are presented, with typical relationships between raw water NOM content, coagulant dose requirements and pH. Generally, when applying metal-based coagulants, residual metal concentration was the critical parameter regarding minimum coagulant dose requirements. Typical NOM removal efficiencies were in the range of 75-90% and 40-70% with respect to colour and organic carbon, respectively. Optimum pH conditions for the removal of NOM and/or residual metals do not always coincide with that of turbidity. The experiments also showed that poly-aluminium and ferric chlorides might have some benefits over alum in terms of dose requirements and range of optimum pH values, and that chitosan may be used for colour removal with good results.

Development of automatic coagulant dosage control technology for rapid change of raw water quality parameters

2012 ◽  
Vol 12 (6) ◽  
pp. 918-925 ◽  
Author(s):  
Y. Sangu ◽  
H. Yokoi ◽  
H. Tadokoro ◽  
T. Tachi
Keyword(s):  
Water Quality ◽  
Pilot Scale ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Control Technology ◽  
Raw Water ◽  
Control Logic ◽  
Water Turbidity ◽  
Coagulant Dosage ◽  
Raw Water Quality

An automatic coagulant dosage control technology for water purification plants was developed to deal with rapid changes of raw water quality parameters. Control logic was developed to decide coagulant dosage based on aluminum concentration in rapid mixing tank water based on results of semi-pilot scale experiments. This logic enabled quick feedback on the excess or lack of coagulant. It was found that the aluminum residual rate, which was proposed as an indicator of coagulation reactions, could be given as a function of coagulant dosage and turbidity. The effectiveness of the control logic was verified in semi-pilot scale experiments. Settled water turbidity was within ±0.5 NTU of target value even when raw water turbidity increased rapidly up to 100 NTU.

scholarly journals Characterization of pasteurized milk spoilage by electronic nose in relation to its selected quality parameters

2021 ◽  
Vol 10 (2) ◽  
pp. 383-397
Author(s):  
Saleem Ehsan ◽  
Zahir Al-Attabi ◽  
Nasser Al-Habsi ◽  
Michel R. G. Claereboudt ◽  
Mohammad Shafiur Rahman
Keyword(s):  
Shelf Life ◽  
Electronic Nose ◽  
Principal Component ◽  
Titratable Acidity ◽  
Bacterial Count ◽  
Quality Parameters ◽  
Accurate Estimation ◽  
Total Bacterial Count ◽  
Microbial Count ◽  
Linear Discriminant

Pasteurized fresh milk requires an accurate estimation of shelf life under various conditions to minimize the risk of spoilage and product losses. Milk samples were stored for 56 h in an oven at 25°C and for 15 days in a refrigerator at 4°C. Samples were analyzed using an electronic nose (e-nose), total bacterial count, titratable acidity and pH to determine the quality of milk. Principal Component Analysis (PCA) and Linear Discriminant Analysis (LDA) were used to analyze e-nose data of milk stored at 25°C, and 4°C. A clear shift in quality was identified by the e-nose, which also appeared in the total bacterial count after 24 h and 12 days for storage at 25 and 4°C, respectively. On the other hand, titratable acidity exceeded the normal limits of 0.14 % - 0.21 % after 24 h for storage at 25°C (0.247 ± 0.006 %) and after 15 days for storage at 4°C (0.25 ± 0.01 %). If pH was a good indicator of quality for samples stored at 25°C, it showed no clear trends for samples stored at 4°C. Based on the microbial count data and e-nose output, the milk had a shelf life of 0.3 day (i.e. 8 h) when stored at 25°C. Shelf life was extended to 9 days when stored at 4°C.

scholarly journals Quality Parameters of Juice Obtained from Hydroponically Grown Tomato Processed with High Hydrostatic Pressure or Heat Pasteurization

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Maja Jeż ◽  
Wioletta Błaszczak ◽  
Kamila Penkacik ◽  
Ryszard Amarowicz
Keyword(s):  
Hydrostatic Pressure ◽  
Antioxidant Capacity ◽  
High Hydrostatic Pressure ◽  
Storage Period ◽  
Quality Parameters ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Microbial Count ◽  
Antioxidant Power ◽  
Trolox Equivalent

The effect of processing such as high hydrostatic pressure (HHP) (400-600 MPa/15 min) or low pasteurization temperature (LPT) (74°C/2 min) or high pasteurization temperature (HPT) (90°C/1 min) on selected quality parameters of juice obtained from hydroponically cultivated beef tomatoes was investigated. The total polyphenols content (TPC), total phenolic index (TPI), Trolox equivalent antioxidant capacity (ABTS) and ferric reducing antioxidant power (FRAP) were analysed in the fresh and processed juices stored for 0, 7 and 14 days. What is more, colour parameters (L∗,a∗,b∗,∆E), the activity of polyphenol oxidase (PPO) and peroxidase (POD) and microbial stability were also analyzed following the juices storage. Among all the tested samples, the juice exposed to 600 MPa for 15 min showed superior quality. Samples treated with 600 MPa for 15 min and stored for 0, 7 and 14 days had high TPC, TPI, ABTS, FRAP and a∗ values. As demonstrated, these tested samples at the end of the storage period retained 90% and 95% of their polyphenol content and antioxidant capacity, respectively. As in the case of pasteurization, juice processing at 600 MPa for 15 min clearly reduced the activity of food-spoiling enzymes (PPO, POD) as well as the microbial count. The obtained results showed that TPC was significantly and positively correlated with TPI, ABTS and FRAP parameters.

Effect of Pilot-Scale Aseptic Processing on Tomato Soup Quality Parameters

2011 ◽  
Vol 76 (5) ◽  
pp. C714-C723 ◽  
Author(s):  
Ines J.P. Colle ◽  
Anna Andrys ◽  
Andrea Grundelius ◽  
Lien Lemmens ◽  
Anders Löfgren ◽  
...  
Keyword(s):  
Pilot Scale ◽  
Quality Parameters ◽  
Aseptic Processing ◽  
Tomato Soup

scholarly journals Modeling microbial diversity in anaerobic digestion

2008 ◽  
Vol 57 (2) ◽  
pp. 265-270 ◽  
Author(s):  
I. Ramirez ◽  
J. P. Steyer
Keyword(s):  
Experimental Data ◽  
Anaerobic Digestion ◽  
Microbial Diversity ◽  
Pilot Scale ◽  
Anaerobic Digester ◽  
Structured Model ◽  
Modeling Approach ◽  
Distillery Wastewater ◽  
Stochastic Term ◽  
Near Future

The aim of this study is to develop a modeling approach able to handle microbial diversity both in normal and abnormal situations. Normal situations are defined as changing input characteristics that do not imply process imbalance while abnormal situations are illustrated by the presence of toxicant into the reactor. In both cases, modeling is performed by adding a stochastic term on top of a well defined and well structured model such as the IWA Anaerobic Digestion Model No1. Experimental data from a 1 m3 pilot scale anaerobic digester treating wine distillery wastewater are provided to demonstrate the applicability of this approach. Discussion also highlights that monitoring of digesters might receive a renewed consideration in the near future in order to handle explicitly microbial diversity within the control objectives.

Comparative study of membrane bioreactor (MBR) and activated sludge processes in the treatment of Moroccan domestic wastewater

2018 ◽  
Vol 78 (5) ◽  
pp. 1129-1136 ◽  
Author(s):  
S. Kitanou ◽  
M. Tahri ◽  
B. Bachiri ◽  
M. Mahi ◽  
M. Hafsi ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Membrane Bioreactor ◽  
Ceramic Membrane ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Pilot Scale ◽  
Quality Parameters ◽  
Effluent Quality ◽  
Conventional Activated Sludge ◽  
Activated Sludge Processes

Abstract The study was based on an external pilot-scale membrane bioreactor (MBR) with a ceramic membrane compared to a conventional activated sludge process (ASP) plant. Both systems received their influent from domestic wastewater. The MBR produced an effluent of much better quality than the ASP in terms of total suspended solids (TSS), 5-day biological oxygen demand (BOD5) and chemical oxygen demand (COD), total phosphorus (TP) and total nitrogen (TN). Other effluent quality parameters also indicated substantial differences between the ASP and the MBR. This study leads to the conclusion that in the case of domestic wastewater, MBR treatment leads to excellent effluent quality. Hence, the replacement of ASP by MBR may be justified on the basis of the improved removal of solids, nutrients, and micropollutants. Furthermore, in terms of reuse the high quality of the treated water allows it to be reused for irrigation.

How well do early-generation quality tests predict flour performance?

2004 ◽  
Vol 84 (1) ◽  
pp. 71-78 ◽  
Author(s):  
K. Kaur ◽  
O. M. Lukow ◽  
K. R. Preston ◽  
L. J. Malcolmson
Keyword(s):  
Protein Content ◽  
Pilot Scale ◽  
Peak Height ◽  
Quality Parameters ◽  
Screening Tests ◽  
Research Centre ◽  
Strong Correlations ◽  
Early Generation ◽  
Baking Quality ◽  
Wide Range

A wide range of flours varying in prote in content, strength and baking quality were used to investigate the relationship between early-generation screening tests at the Cereal Research Centre, advanced generation testing at the Grain Research Laboratory (GRL) and pilot-scale commercial testing at the Canadian International Grains Institute (CIGI) and Warburton Foods Ltd. Correlations among flour protein content, mixograph, farinograph and baking characteristics were performed. Strong correlations were found between protein content, mixograph peak height and mixograph total energy with baking water absorption at advanced, and pilot-scale commercial levels of baking, which gave a good indication of all baking quality parameters. Mixograph characteristics and protein content from early generation tests furnished information that correlated with baking data and with farinograph measurements. Key words: Protein content, mixograph, farinograph, early-generation test, pilot-scale commercial baking

Effects of plant and influent C:N:P ratio on microbial diversity in pilot-scale constructed wetlands

2010 ◽  
Vol 36 (4) ◽  
pp. 441-449 ◽  
Author(s):  
Yongjun Zhao ◽  
Bo Liu ◽  
Wenguang Zhang ◽  
Changwei Hu ◽  
Shuqing An
Keyword(s):  
Microbial Diversity ◽  
Constructed Wetlands ◽  
Pilot Scale ◽  
C:N:P Ratio
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