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https://www.readbyqxmd.com/read/29156429/kinetics-of-biogas-production-and-chemical-oxygen-demand-removal-from-compost-leachate-in-an-anaerobic-migrating-blanket-reactor
#1
Aliasghar Ebrahimi, Hassan Hashemi, Hadi Eslami, Reza Ali Fallahzadeh, Rasoul Khosravi, Roohollah Askari, Esmail Ghahramani
In this study, laboratory anaerobic migrating blanket reactor (AMBR) with four units was used to reduce and remove COD leachate of composting process; it was also used to determine the kinetic coefficients of COD removal and biogas and methane gas production in several different OLRs. The maximum concentration of organic matter entering the reactor was 100,000 mg/L and the reactor was under operation for 319 days. The results showed that the COD removal efficiency of AMBR in all concentrations of substrate entering the reactor was above 80%...
November 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29156395/validation-of-a-multi-phase-plant-wide-model-for-the-description-of-the-aeration-process-in-a-wwtp
#2
I Lizarralde, T Fernández-Arévalo, S Beltrán, E Ayesa, P Grau
This paper introduces a new mathematical model built under the PC-PWM methodology to describe the aeration process in a full-scale WWTP. This methodology enables a systematic and rigorous incorporation of chemical and physico-chemical transformations into biochemical process models, particularly for the description of liquid-gas transfer to describe the aeration process. The mathematical model constructed is able to reproduce biological COD and nitrogen removal, liquid-gas transfer and chemical reactions. The capability of the model to describe the liquid-gas mass transfer has been tested by comparing simulated and experimental results in a full-scale WWTP...
October 30, 2017: Water Research
https://www.readbyqxmd.com/read/29156370/a-novel-aerated-surface-flow-constructed-wetland-using-exhaust-gas-from-biological-wastewater-treatment-performance-and-mechanisms
#3
Xinwen Zhang, Zhen Hu, Jian Zhang, Jinlin Fan, Huu Hao Ngo, Wenshan Guo, Chujun Zeng, Yiwen Wu, Siyuan Wang
In this study, a novel aerated surface flow constructed wetland (SFCW) using exhaust gas from biological wastewater treatment was investigated. Compared with un-aerated SFCW, the introduction of exhaust gas into SFCW significantly improved NH4(+)-N, TN and COD removal efficiencies by 68.30 ± 2.06%, 24.92 ± 1.13% and 73.92 ± 2.36%, respectively. The pollutants removal mechanism was related to the microbial abundance and the highest microbial abundance was observed in the SFCW with exhaust gas because of the introduction of exhaust gas from sequencing batch reactor (SBR), and thereby optimizing nitrogen transformation processes...
September 18, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29155467/synthesis-characterisation-and-reactions-of-truly-cationic-ni-i-phosphine-complexes
#4
Ingo Krossing, Miriam Mareen Schwab, Daniel Himmel, Sylwia Kacprzak, Valentin Radtke, Daniel Kratzert, Philippe Weis, Melanie Wernet, Andreas Peter, Zeinab Yassine, Dominik Schmitz, Ernst-Wilhelm Scheidt, Wolfgang Scherer, Stefan Weber, Wolfram Feuerstein, Frank Breher, Alexander Higelin
The recently published purely metalorganic NiI salt [Ni(cod)2][Al(ORF)4] (1, cod = 1,5-cyclooctadiene, RF = C(CF3)3) provides a starting point for a new synthesis strategy leading to NiI phosphine complexes, replacing cod ligands by phosphines. Clearly visible colour changes indicate reactions within minutes, while quantum chemical calculations (PBE0-D3(BJ)/def2-TZVPP) approve exergonic reaction enthalpies in all performed ligand exchange reactions. Hence, [Ni(dppp)2][Al(ORF)4] (2, dppp = 1,3-Bis(diphenylphosphino)propane), [Ni(dppe)2][Al(ORF)4] (3, dppe = 1,3-Bis(diphenyl-phosphino)ethane), three-coordinate [Ni(PPh3)3][Al(ORF)4] (4) and a remarkable two-coordinate NiI phosphine complex [Ni(PtBu3)2][Al(ORF)4] (5) were characterised via single crystal X-ray structure analysis...
November 20, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29154153/effects-of-temperature-and-hrt-on-performance-of-a-novel-insulated-anaerobic-filter-iaf-system-incorporated-with-the-waste-heat-input-for-building-wastewater-treatment
#5
Chalearn Bouted, Chavalit Ratanatamskul
Effects of temperature and hydraulic retention time (HRT) on the performance of the novel insulated anaerobic filter system (IAF) incorporated with the waste heat input in treating building wastewater were investigated. In this study, an electric heater was used to simulate the waste heat input from air conditioner to the IAF system. The wastewater was collected from an office building in Phitsanulok province, Thailand. The HRTs of IAF system were varied to 9, 18 and 27 h, whereas the water temperatures were raised from 30 °C to 35 °C, 40 °C and 45 °C by electric heating to the IAF tank with the covered insulator...
November 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29153776/francisella-noatunensis-subspecies-noatunensis-clpb-deletion-mutant-impairs-development-of-francisellosis-in-a-zebrafish-model
#6
Elisabeth O Lampe, Carl Zingmark, Julia I Tandberg, Ida Marie P Thrane, Espen Brudal, Anders Sjöstedt, Hanne C Winther-Larsen
BACKGROUND: Francisella noatunensis ssp. noatunensis (F.n.n.) is the causative agent of francisellosis in Atlantic cod and constitutes one of the main challenges for future aquaculture on this species. A facultative intracellular bacterium like F.n.n. exert an immunologic challenge against which live attenuated vaccines in general are most effective. Thus, we constructed a deletion in the F.n.n. clpB gene as ΔclpB mutants are among the most promising vaccine candidates in human pathogenic Francisella...
November 16, 2017: Vaccine
https://www.readbyqxmd.com/read/29153652/enzymes-catalyzing-pre-hydrolysis-facilitated-the-anaerobic-fermentation-of-waste-activated-sludge-with-acidogenic-and-microbiological-perspectives
#7
Xiaodong Xin, Junguo He, Lin Li, Wei Qiu
This study investigated acidogenic and microbiological perspectives in the anaerobic fermentation (AF) of waste activated sludge (WAS) pre-hydrolyzed by enzymes catalysis. The enzymes catalysis boosted WAS biodegradability dramatically with nearly 8500 mg/L soluble chemical oxygen demand (SCOD) increase just within 4 h. The volatile fatty acids (VFAs) in the acidogenesis were accumulated effectively with over 3200 mg COD/L in 12 d, which reached 0.687 kWh/kg VSS electricity conversion efficiency (2...
October 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29153102/stability-of-compounded-trilostane-suspension-in-cod-liver-oil
#8
Jesse Crosby, Stacy Brown
Trilostane is a synthetic steroid analog used to treat canine hyperadrenocorticism. For small dogs, the dose found in commercially available dosage forms of trilostane is sometimes too high. Compounding trilostane in a liquid diluent provides an option for more precise dosing and adjustments, and can be easier to administer, versus a tablet or capsule. Trilostane suspends well in cod liver oil, which is generally palatable to dogs. The stability of a compounded trilostane suspension in cod liver oil stored at room temperature was investigated for 90 days...
October 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29151885/treatment-of-old-landfill-leachate-with-high-ammonium-content-using-aerobic-granular-sludge
#9
Yanan Ren, Fernanda Ferraz, Abbass Jafari Kang, Qiuyan Yuan
Background: Aerobic granular sludge has become an attractive alternative to the conventional activated sludge due to its high settling velocity, compact structure, and higher tolerance to toxic substances and adverse conditions. Aerobic granular sludge process has been studied intensively in the treatment of municipal and industrial wastewater. However, information on leachate treatment using aerobic granular sludge is very limited. Methods: This study investigated the treatment performance of old landfill leachate with different levels of ammonium using two aerobic sequencing batch reactors (SBR): an activated sludge SBR (ASBR) and a granular sludge SBR (GSBR)...
2017: Journal of Biological Engineering
https://www.readbyqxmd.com/read/29151639/efficient-using-durian-shell-hydrolysate-as-low-cost-substrate-for-bacterial-cellulose-production-by-gluconacetobacter-xylinus
#10
Mu-Tan Luo, Cheng Zhao, Chao Huang, Xue-Fang Chen, Qian-Lin Huang, Gao-Xiang Qi, Lan-Lan Tian, Lian Xiong, Hai-Long Li, Xin-De Chen
Durian is one important tropical fruit with high nutritional value, but its shell is usually useless and considered as waste. To explore the efficient and high-value utilization of this agricultural and food waste, in this study, durian shell was simply hydrolyzed by dilute sulfuric acid, and the durian shell hydrolysate after detoxification was used for bacterial cellulose (BC) production by Gluconacetobacter xylinus for the first time. BC was synthesized in static culture for 10 days and the highest BC yield (2...
December 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/29149674/the-impact-of-operational-strategies-on-the-performance-of-a-photo-ebpr-system
#11
V C F Carvalho, E B Freitas, P J Silva, J C Fradinho, M A M Reis, A Oehmen
A novel Phototrophic - Enhanced Biological Phosphorus Removal (Photo-EBPR) system, consisting of a consortium of photosynthetic organisms and polyphosphate accumulating organisms (PAOs), was studied in this work. A sequencing batch reactor was fed with a mixture of acetate and propionate (75%-25%) and subjected to dark/light cycles in order to select a photo-EBPR system containing PAOs and photosynthetic organisms, the latter likely providers of oxygen to the system. The results from the selection period (stage 1) showed that the photo-EBPR culture was capable of performing P release in the dark and P uptake in the presence of light, under limited oxygen concentrations...
November 4, 2017: Water Research
https://www.readbyqxmd.com/read/29149562/nickel-catalyzed-formation-of-1-3-dienes-via-a-highly-selective-cross-tetramerization-of-tetrafluoroethylene-styrenes-alkynes-and-ethylene
#12
Takuya Kawashima, Masato Ohashi, Sensuke Ogoshi
In the presence of a catalytic amount of Ni(cod)2 (cod = 1,5-cyclooctadiene) and PCy3 (Cy = cyclohexyl), the cross-tetramerization of tetrafluoroethylene (TFE), alkynes, and ethylene occurred in a highly selective manner to afford a variety of 1,3-dienes with a 3,3,4,4-tetrafluorobutyl chain. In addition, a Ni(0)-catalyzed cross-tetramerization of TFE, alkynes, ethylene, and styrene was developed. These catalytic reactions might proceed via partially fluorinated five- and seven-membered nickelacycle key intermediates...
November 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29148050/the-pharmacokinetics-of-morphine-and-codeine-in-human-plasma-and-urine-after-oral-administration-of-qiangli-pipa-syrup
#13
Bin-Bin Guo, Yu-Qiao Zhang, Sheng-Feng Wang, Jin-Song Ding, Wen-Hu Zhou
Papaveris pericarpium, a natural source of morphine and codeine, is the principal active component in many antitussive traditional Chinese medicines. We herein report the first PK study of papaveris pericarpium in human plasma and urine following oral administration of single (15, 30, 60 mL) and multiple dose (15 mL) of Qiangli Pipa Syrup (MOR 0.1 mg/mL, COD 0.028 mg/mL) by monitoring morphine and codeine using a HPLC-MS/MS method. Their Tmax and t1/2 values are independent of dosages, while the AUC0-t linearly increased with higher dosages, indicating linear PK characteristics...
November 17, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/29147739/effects-of-coking-wastewater-on-the-growth-of-five-wetland-plant-species
#14
Yulin Xiang, Yukun Xiang, Lipeng Wang, Yurong Jiao
In order to investigate the effect of wetland plants in the treatment of coking wastewater, Oenanthe javanica (Blume) DC (OC), Artemisia selengensis Turcz. ex Bess. (AB), Echinochloa crusgalli (L.) Beauv. (EB), Brasenia schreberi J.F.Gmel. (BG), and Lythrum salicaria L. (LL) were used to remove ammonia-nitrogen and chemical oxygen demand (COD) from coking wastewater. Results showed high concentrations (> 30%, diluted by deionized water) of coking wastewater caused decreased photosynthetic rate, transpiration rate, and relative growth rate in all studied plants...
November 16, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29146770/environmental-population-and-life-stage-plasticity-in-the-visual-system-of-atlantic-cod
#15
Ragnhild Valen, Rita Karlsen, Jon Vidar Helvik
The visual system is for many fishes essential in guiding behaviors such as foraging, predator avoidance and mate choice. The marine environment is characterized by large spatiotemporal fluctuations in light intensity and spectral composition. However, visual capabilities are restricted by both space limitations set by eye size, and by the genomic content of light absorbing opsin genes. The rich array of visual opsins in teleosts may be used differentially to tune vision towards specific needs during ontogeny, and to changing light...
November 16, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29146353/handheld-nir-device-a-non-targeted-approach-to-assess-authenticity-of-fish-fillets-and-patties
#16
Silvia Grassi, Ernestina Casiraghi, Cristina Alamprese
This study evaluates the reliability of a handheld NIR device in distinguishing fillets and patties of Atlantic cod (n = 80) from those of haddock (n = 90), in comparison with a FT-NIR benchtop spectrometer. The authentication issue was faced by Linear Discriminant Analysis (LDA) and Soft Independent Modelling of Class Analogy (SIMCA), pre-treating spectral data with different algorithms, and validating models both internally and externally. The best LDA models gave 100% correct classification in prediction...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29145989/pain-management-strategies-in-shoulder-arthroplasty
#17
REVIEW
Jason L Codding, Charles L Getz
Pain control in total shoulder arthroplasty demands a multidisciplinary approach with collaboration between patients, surgeon, and anesthetist. A multimodal approach with preemptive medication, regional blockade, local anesthetics, and a combination of acetaminophen, nonsteroidal antiinflammatory drugs, tramadol, and gabapentinoids postoperatively leads to pain control and patient satisfaction. Assessment of patients' expectations constitutes a vital aspect of the preoperative patient evaluation. Educating and psychologically preparing patients reduces postoperative pain...
January 2018: Orthopedic Clinics of North America
https://www.readbyqxmd.com/read/29145139/application-and-microbial-ecology-of-psychrotrophs-in-domestic-wastewater-treatment-at-low-temperature
#18
Zhenzhen Xu, Yue Ben, Zhonglin Chen, Anxi Jiang, Jimin Shen, Xiaoyun Han
The feasibility of a bunch of screened psychrotrophs being applied to low-temperature wastewater treatment was investigated. The screened psychrophillic strains are capable of growth at a broad temperature-range from 0 to 40 °C and exhibit a preferable TTC-dehydrogenase activity at low temperature (4-10 °C). Along the sharply fluctuant temperatures (25-4-25 °C), the screened psychrotrophs (compared with the indigenous mesophiles) demonstrate less fluctuations of COD removal and more rapid recovery after temperature shocks...
October 24, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145123/continuous-liquid-fermentation-of-pretreated-waste-activated-sludge-for-high-rate-volatile-fatty-acids-production-and-online-nutrients-recovery
#19
Lihui Zhang, He Liu, Zhiyong Zheng, Huijun Ma, Meng Yang, Hongbo Liu
Raw sludge was pretreated, and the separated sludge liquid was used as substrate in a continuous operated up-flow anaerobic sludge blanket reactor to produce volatile fatty acids (VFAs). The highest VFA productivity of continuous fermentation with sludge liquid at an organic loading rate (OLR) of 10.0 kg COD/m(3)/d was about 5.0-fold and 4.0-fold higher than batch and semi-continuous fermentation with pretreated sludge slurry, respectively. Moreover, the liquid fermentation with an OLR of 10.0 kg COD/m(3)/d consumed the least energy, which was about 10...
November 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29145120/enhanced-nitrogen-removal-from-piggery-wastewater-with-high-nh4-and-low-cod-tn-ratio-in-a-novel-upflow-microaerobic-biofilm-reactor
#20
Jia Meng, Jiuling Li, Jianzheng Li, Philip Antwi, Kaiwen Deng, Jun Nan, Pianpian Xu
To enhance nutrient removal more cost-efficiently in microaerobic process treating piggery wastewater characterized by high ammonium (NH4(+)-N) and low chemical oxygen demand (COD) to total nitrogen (TN) ratio, a novel upflow microaerobic biofilm reactor (UMBR) was constructed and the efficiency in nutrient removal was evaluated with various influent COD/TN ratios and reflux ratios. The results showed that the biofilm on the carriers had increased the biomass in the UMBR and enhanced the enrichment of slow-growth-rate bacteria such as nitrifiers, denitrifiers and anammox bacteria...
November 11, 2017: Bioresource Technology
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