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https://www.readbyqxmd.com/read/28333092/impact-of-coagulant-and-flocculant-addition-to-an-anaerobic-dynamic-membrane-bioreactor-andmbr-treating-waste-activated-sludge
#1
Guido Kooijman, Wilton Lopes, Zhongbo Zhou, Hongxiao Guo, Merle de Kreuk, Henri Spanjers, Jules van Lier
In this work, we investigated the effects of flocculation aid (FA) addition to an anaerobic dynamic membrane bioreactor (AnDMBR) (7 L, 35 °C) treating waste-activated sludge (WAS). The experiment consisted of three distinct periods. In period 1 (day 1-86), the reactor was operated as a conventional anaerobic digester with a solids retention time (SRT) and hydraulic retention time (HRT) of 24 days. In period 2 (day 86-303), the HRT was lowered to 18 days with the application of a dynamic membrane while the SRT was kept the same...
March 23, 2017: Membranes
https://www.readbyqxmd.com/read/28333064/the-removal-of-typical-pollutants-in-secondary-effluent-by-the-combined-process-of-powdered-activated-carbon-ultrafiltration
#2
Lihua Sun, Ning He, Tianmin Yu, Xi Duan, Cuimin Feng, Yajun Zhang
This paper focused on the effects of powdered activated carbon (PAC) dosage on ultrafiltration (UF) membrane flux caused by natural organic matter (NOM). Three model foulants, humic acid (HA), bovine serum albumin (BSA) and sodium alginate (SA), were adopted to represent different NOM fractions in secondary effluent treated by the combined process of PAC-UF. Moreover, the membrane fouling resistance and fouling mechanism were also analyzed. The results indicated that the best PAC dosage for the membrane flux variation was 20 mg/L for HA and SA, and 10 mg/L for BSA...
March 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28332071/the-nutritive-value-of-marula-sclerocarya-birrea-seed-cake-for-broiler-chickens-nutritional-composition-performance-carcass-characteristics-and-oxidative-and-mycotoxin-status
#3
Doctor Mziwenkosi Nhlanhla Mthiyane, Bhekumusa Sabelo Mhlanga
This study was aimed at investigating the nutritive value of marula seed cake (MSC) as an alternative protein source for broilers. In a completely randomised design involving six replicate pens of five chickens assigned to each of five treatments, body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE) and carcass characteristics were measured in an experiment in which 150 28-day-old broilers were fed maize-based diets containing, respectively, 0, 5, 10, 15 and 20% MSC at finisher phase. The results showed MSC to be remarkably high in CP (470...
March 22, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28330216/potential-application-of-waste-from-castor-bean-ricinus-communis-l-for-production-for-xylanase-of-interest-in-the-industry
#4
Polyanna Nunes Herculano, Keila Aparecida Moreira, Raquel Pedrosa Bezerra, Tatiana Souza Porto, Cristina Maria de Souza-Motta, Ana Lúcia Figueiredo Porto
Xylanases activity (XY) from Aspergillus japonicus URM5620 produced by Solid-State Fermentation (SSF) of castor press cake (Ricinus communis) on different conditions of production and extraction by PEG/citrate aqueous two-phase system (ATPS) were investigated. XY production was influenced by substrate amount (5-10 g), initial moisture (15-35 %), pH (4.0-6.0) and temperature (25-35 °C), obtaining the maximum activity of 29,085 ± 1808 U g ds(-1) using 5.0 g of substrate with initial moisture of 15 % at 25 °C and pH 6...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330203/evaluation-of-several-ionic-liquids-for-in-situ-hydrolysis-of-empty-fruit-bunches-by-locally-produced-cellulase
#5
Amal Ahmed Elgharbawy, Md Zahangir Alam, Nassereldeen Ahmad Kabbashi, Muhammad Moniruzzaman, Parveen Jamal
Lignocellulosic biomasses, exhibit resistance to enzymatic hydrolysis due to the presence of lignin and hemicellulose. Ionic liquids proved their applicability in lignin degradation, however, ionic liquid removal has to be performed to proceed to hydrolysis. Therefore, this study reports an in situ hydrolysis of empty fruit bunches (EFB) that combined an ionic liquid (IL) pretreatment and enzymatic hydrolysis. For enzyme production, palm kernel cake (PKC) was used as the primary media for microbial cellulase (PKC-Cel) from Trichoderma reesei (RUTC30)...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330198/pretreatment-and-enzymatic-process-modification-strategies-to-improve-efficiency-of-sugar-production-from-sugarcane-bagasse
#6
Siddhartha Pal, Shereena Joy, Kalpana D Trimukhe, Pramod S Kumbhar, Anjani J Varma, Sasisanker Padmanabhan
Pretreatment and enzymatic hydrolysis play a critical role in the economic production of sugars and fuels from lignocellulosic biomass. In this study, we evaluated diverse pilot-scale pretreatments and different post-pretreatment strategies for the production of fermentable sugars from sugarcane bagasse. For the pretreatment of bagasse at pilot-scale level, steam explosion without catalyst and combination of sulfuric and oxalic acids at low and high loadings were used. Subsequently, to enhance the efficiency of enzymatic hydrolysis of the pretreated bagasse, three different post-pretreatment process schemes were investigated...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28330106/enhanced-production-of-pectinase-by-aspergillus-terreus-ncft-4269-10-using-banana-peels-as-substrate
#7
Bijay Kumar Sethi, Prativa Kumari Nanda, Santilata Sahoo
Aspergillus terreus NCFT4269.10 was implemented in solid-state (SSF) and liquid static surface fermentation (LSSF) for biosynthesis of pectinase. Amongst various substrates, like, mustard oil cake, neem oil cake, groundnut oil cake, black gram peels, green gram peels, chickling vetch peels/grass pea peels wheat bran, pearl millet residues, finger millet waste, broken rice, banana peels (BP), apple pomace (AP) and orange peels, banana peel (Musa paradisiaca L.; Family: Musaceae) was most suitable for pectinase biosynthesis (LSSF: 400 ± 21...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28314664/membrane-fouling-control-in-membrane-bioreactors-mbrs-using-granular-materials
#8
REVIEW
Oliver Terna Iorhemen, Rania Ahmed Hamza, Joo Hwa Tay
Membrane fouling is considered the major limitation of membrane bioreactors (MBRs). This paper provides an overview on fouling mitigation in MBRs using granular materials. Adsorbents addition extends filtration period, improves critical flux as well as sludge properties (increased flocs size, reduced soluble EPS, improved dewaterability). However, determination of optimal dosages of adsorbents is needed to balance cost savings from fouling mitigation versus cost of adsorbents and sludge handling. The abrasion from granular media reduces cake layer formation, extends membrane filtration period, increases flux (∼20-30%), and reduces aeration intensity by 50%...
March 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28303045/dielectric-properties-optimum-formulation-and-microwave-baking-conditions-of-chickpea-cakes
#9
Yaşar Özlem Alifakı, Özge Şakıyan
The aim of this study was to correlate dielectric properties with quality parameters, and to optimize cake formulation and baking conditions by response surface methodology. Weight loss, color, specific volume, hardness and porosity were evaluated. The samples with different DATEM (0.4, 0.8 and 1.2%) and chickpea flour concentrations (30, 40 and 50%) were baked in microwave oven at different power (300, 350, 400 W) and baking times (2.50, 3.0, 3.50 min). It was found that microwave power showed significant effect on color, while baking time showed effect on weight loss, porosity, hardness, specific volume and dielectric properties...
March 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28302879/student-cake-off-benefits-homeless-and-pet-charity
#10
(no author information available yet)
No abstract text is available yet for this article.
March 18, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28286013/membrane-fouling-by-sodium-alginate-in-high-salinity-conditions-to-simulate-biofouling-during-seawater-desalination
#11
Amine Charfi, Hoseok Jang, Jeonghwan Kim
This study aims to better understand biofouling by algal organic matters (AOM) during seawater pretreatment by microfiltration (MF). To simulate AOM biofouling, sodium alginate (SA) solutions with three different concentrations (2, 20 and 50ppm) were filtered in dead-end mode with MF membrane. A modelling approach with blocking laws was used to identify the fouling mechanisms behind flux decline with time. The effect of SA concentration and cations such as Na(+) (0.6M) and Ca(2+) (0.015M) addition to SA solution on fouling mechanisms was studied...
February 21, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28279938/efficient-control-of-membrane-fouling-in-mf-by-removal-of-biopolymers-comparison-of-various-pretreatments
#12
Katsuki Kimura, Yasumitsu Oki
In recent studies on membrane fouling in microfiltration (MF) and ultrafiltration (UF) for drinking water production, hydrophilic macromolecular organics referred to as biopolymers have been shown to be major players in the fouling. In this study, various pretreatments were compared to maximize removal of biopolymers and to control membrane fouling efficiently. Multiple water samples were collected from different drinking water sources and were used in this study. Coagulation using polyaluminum chloride (PACl) was carried out under conditions of different dosages and different pHs and was also carried out in combination with the use of powdered activated carbon (PAC) or magnetic ion exchange (MIEX(®)) resin...
February 20, 2017: Water Research
https://www.readbyqxmd.com/read/28278122/cadmium-lead-mercury-and-arsenic-in-animal-feed-and-feed-materials-trend-analysis-of-monitoring-results
#13
Paulien Adamse, H J Ine Van der Fels-Klerx, Jacob de Jong
This study aimed to obtain insights into the presence of cadmium, lead, mercury and arsenic in feed materials and feed over time, for the purpose of guiding national monitoring. Data from the Dutch feed monitoring program and from representatives of the feed industry in the period 2007-2013 were used. Data covered the concentrations of cadmium, lead, mercury and arsenic in a variety of feed materials and compound feeds in The Netherlands. Trends in the percentage of samples that exceeded the maximum limit (ML), set by the European Commission, and trends in average, median and 90(th) percentile concentrations of each of these elements per feed material or compound feed were investigated...
March 2, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28278090/enhancing-faecal-sludge-dewaterability-and-end-use-by-conditioning-with-sawdust-and-charcoal-dust
#14
Swaib Semiyaga, Mackay A E Okure, Charles B Niwagaba, Philip M Nyenje, Frank Kansiime
Faecal sludge (FS) treatment in urban slums of low-income countries of sub-Saharan Africa is poor or non-existent. FS contains over 90% water and therefore, dewatering it within slums decreases transport costs, facilitates local treatment and end-use. This study was designed to enhance the dewatering efficiency of FS, using two locally available physical conditioners (sawdust and charcoal dust), each applied at dosages of 0, 25, 50, 75, 100 and 125% TS. The optimum dosage for both conditioners occurred at 50 and 75% for cake moisture content and capillary suction time, respectively...
March 1, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28274428/addition-of-chia-seed-mucilage-for-reduction-of-fat-content-in-bread-and-cakes
#15
Sibele Santos Fernandes, Myriam de Las Mercedes Salas-Mellado
In this study, breads and chocolate cakes were prepared with different levels of chia mucilage dried at 50°C or lyophilized as fat, resulting in healthier products. Results indicated that breads and chocolate cakes made with chia mucilage can replace up to 50% of fat without affecting the technological and physical characteristics. The replacement of 75% of fat, for both types of mucilage, had a significant reduction in fat content of 56.6% in breads and 51.6% in cakes, producing a slight decrease in the technological characteristics of the products...
July 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28264453/assessment-of-a-new-silicon-carbide-tubular-honeycomb-membrane-for-treatment-of-olive-mill-wastewaters
#16
Maria C Fraga, Sandra Sanches, João G Crespo, Vanessa J Pereira
Extremely high removals of total suspended solids and oil and grease were obtained when olive mill wastewaters were filtered using new silicon carbide tubular membranes. These new membranes were used at constant permeate flux to treat real olive mill wastewaters at pilot scale. The filtration conditions were evaluated and optimized in terms of the selection of the permeate flux and flux maintenance strategies employed-backpulsing and backwashing-in order to reduce fouling formation. The results obtained reveal that the combination of backpulses and backwashes helps to maintain the permeate flux, avoids transmembrane pressure increase and decreases the cake resistance...
February 27, 2017: Membranes
https://www.readbyqxmd.com/read/28254495/an-artificial-intelligence-framework-for-compensating-transgressions-and-its-application-to-diet-management
#17
Luca Anselma, Alessandro Mazzei, Franco De Michieli
Today, there is considerable interest in personal healthcare. The pervasiveness of technology allows to precisely track human behavior; however, when dealing with the development of an intelligent assistant exploiting data acquired through such technologies, a critical issue has to be taken into account; namely, that of supporting the user in the event of any transgression with respect to the optimal behavior. In this paper we present a reasoning framework based on Simple Temporal Problems that can be applied to a general class of problems,, which we called "cake&carrot problems", to support reasoning in presence of human transgression...
February 27, 2017: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/28249377/sunflower-cake-with-or-without-enzymatic-complex-for-broiler-chickens-feeding
#18
Eveline Berwanger, Ricardo Vianna Nunes, Tiago Junior Pasquetti, Alice Eiko Murakami, Taciana Maria Moraes de Oliveira, Douglas Fernando Bayerle, Rafael Frank
OBJECTIVE: This study was to evaluate the sunflower cake and enzymatic complex fed to broilers from 22 to 42 d of age. METHODS: In a completely randomized design, a total of 850 birds were allotted in a 2×5 factorial scheme (with and without enzymatic complex) and five inclusion levels (0%, 5%, 10%, 15%, 20%) of sunflower cake. There were 5 replications and 17 birds in each experimental unit. Data from performance, carcass yield and intestinal morphology were evaluated...
March 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28247963/nutrition-and-physical-activity-transitions-in-the-ecuadorian-andes-differences-among-urban-and-rural-dwelling-women
#19
Christopher L Melby, Fadya Orozco, Diana Ochoa, Maria Muquinche, Manuel Padro, Fabian N Munoz
OBJECTIVES: The nutrition and physical activity transitions, characterized by increased consumption of high energy density foods and more sedentary lifestyles, are associated with increased obesity and hypertension in Ecuador. These transitions have been characterized primarily in urban areas, which may neglect variation in specific rural areas of Ecuador. Therefore we examined the extent of the differences in dietary and activity patterns, obesity prevalence, and blood pressure (BP) in urban and rural-dwelling women in the Ecuadorian central highlands...
March 1, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/28247575/assessment-of-the-effect-of-grape-seed-cake-inclusion-in-the-diet-of-healthy-fattening-finishing-pigs
#20
I Taranu, M Habeanu, M A Gras, G C Pistol, N Lefter, M Palade, M Ropota, V Sanda Chedea, D E Marin
Modulatory capacity of bioactive compounds from different wastes has been scarcely investigated in pigs. This study aimed to evaluate the effects of dietary inclusion of grape seed cakes (GS diet) on performance and plasma biochemistry parameters as health indicators, as well as on several markers related to inflammation and antioxidant defence in the liver of fattening-finishing pigs. Twelve cross-bred pigs (TOPIG) were randomly assigned to one of two experimental diets: control and 5% grape seed cake diet during finishing period (24 days)...
March 1, 2017: Journal of Animal Physiology and Animal Nutrition
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