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https://www.readbyqxmd.com/read/28724256/first-study-to-explore-the-feasibility-of-applying-microbial-fuel-cells-into-constructed-wetlands-for-cod-monitoring
#1
Lei Xu, Yaqian Zhao, Chuang Fan, Zhiren Fan, Fangchao Zhao
Chemical oxygen demand (COD) is one of the major targets to remove in constructed wetlands (CWs) system. Traditional method for COD measurement is a complex, time-consuming and highly toxic reagents participated procedure. In this study, microbial fuel cell (MFC) was successfully integrated into CW for indicating COD concentration. Results showed that there are two linear correlations between bioelectrical signals (output voltage from MFC) and COD concentration (acetate), which are COD from 0 to 500mg/L (101...
July 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28724101/assessment-of-the-effects-of-total-emission-control-policies-on-surface-water-quality-in-china-2004-to-2014
#2
Xia Liu, Jianfeng Feng, Yinhuan Qiao, Yuqiu Wang, Lin Zhu
Water quality deterioration is a problem throughout the globe, especially in China. The Chinese government established national total emission control (TEC) policies related to the nation's surface water quality over the past 10 yr to restore, protect, and promote healthy water quality. The objective of this study is to evaluate the effects of China's TEC policies by analyzing three water quality constituents (ammonium nitrogen [NH-N], dissolved oxygen [DO], and the permanganate index [COD]) at 73 monitoring stations, which account for most of the surface waters of eastern China...
May 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28723816/importance-of-physical-qualities-for-speed-and-change-of-direction-ability-in-elite-female-soccer-players
#3
Stacey Emmonds, G Nicholson, C Beggs, B Jones, A Bissas
The purpose of this study was to determine the importance of physical qualities for speed and change of direction (CoD) ability in female soccer players. Data were collected on 10 female soccer players who were part of a professional English Women's Super League team. Player assessments included anthropometric (stature and body mass), body composition (dual-energy X-ray absorptiometry), speed (10m, 30m sprint), CoD ability (505 agility), aerobic (Yo-Yo Intermittent Recovery Test), lower-body strength (bilateral knee extensions) and power (countermovement jump [CMJ], squat jump [SJ], 30cm drop jump [DJ]) measures...
July 17, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28721615/phycoremediation-potential-of-marine-microalga-tetraselmis-indica-on-secondary-treated-domestic-sewage-for-nutrient-removal-and-biodiesel-production
#4
Amit, Rajesh Chandra, Uttam Kumar Ghosh, Jagdeep Kumar Nayak
Marine microalga Tetraselmis indica (T. indica) was cultivated in secondary treated domestic sewage (STDS) in batch mode. Optimization studies showed that after 14 days of cultivation period, highest biomass yield reached was 0.88 ± 0.04 g/L at the optimum temperature of 27 ± 1 °C and light intensity of 135 μmol m(-2) s(-1). T. indica removed about 60.93% phosphate, 78.46% nitrate, 72.94% chemical oxygen demand (COD), 73.17% biological oxygen demand (BOD), 98.90% total dissolved solids (TDS) and heavy metals (83...
July 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28721399/nutritional-and-functional-properties-of-fishmeal-produced-from-fresh-by-products-of-cod-gadus-morhua-l-and-saithe-pollachius-virens
#5
Ola Ween, Janne K Stangeland, Turid S Fylling, Grete Hansen Aas
Fresh by-products of whitefish such as cod and saithe is processed to fishmeal (FM) on-board seagoing Norwegian trawlers. The aim of this study was to document the properties of whitefish FM (WFM) protein with respect to, physicochemical and bioactive properties. Analysis of the proximate composition of representative seasonal WFM batches show that the production is robust without much variance. The mean protein (61.9 ± 1.2), fat (8.9 ± 1.1%), moisture (5 ± 1.2%) and ash content (22.4 ± 0.8%), reflect the use of lean and bony raw-material...
July 2017: Heliyon
https://www.readbyqxmd.com/read/28719817/aged-refuse-enhances-anaerobic-digestion-of-waste-activated-sludge
#6
Jianwei Zhao, Lin Gui, Qilin Wang, Yiwen Liu, Dongbo Wang, Bing-Jie Ni, Xiaoming Li, Rui Xu, Guangming Zeng, Qi Yang
In this work, a low-cost alternative approach (i.e., adding aged refuse (AR) into waste activated sludge) to significantly enhance anaerobic digestion of sludge was reported. Experimental results showed that with the addition dosage of AR increasing from 0 to 400 mg/g dry sludge soluble chemical oxygen demand (COD) increased from 1150 to 5240 mg/L at the digestion time of 5 d, while the maximal production of volatile fatty acids (VFA) increased from 82.6 to 183.9 mg COD/g volatile suspended solids. Although further increase of AR addition decreased the concentrations of both soluble COD and VFA, their contents in these systems with AR addition at any concentration investigated were still higher than those in the blank, which resulted in higher methane yields in these systems...
July 14, 2017: Water Research
https://www.readbyqxmd.com/read/28718056/aeration-control-strategies-to-stimulate-simultaneous-nitrification-denitrification-via-nitrite-during-the-formation-of-aerobic-granular-sludge
#7
Thomas Dobbeleers, Jolien D'aes, Solange Miele, Michel Caluwé, Veerle Akkermans, Dominique Daens, Luc Geuens, Jan Dries
In this study, a sequencing batch reactor (SBR), treating synthetic wastewater (COD/N = 5), was operated in two stages. During stage I, an aeration control strategy based on oxygen uptake rate (OUR) was applied, to accomplish nitrogen removal via nitrite >80%. In stage II, the development of aerobic granular sludge (AGS) was examined while two aeration control strategies (OUR and pH slope) maintained the nitrite pathway and optimized the simultaneous nitrification-denitrification (SND) performance. Stimulation of slow-growing organisms, (denitrifying) polyphosphate-accumulating organisms (D)PAO and (denitrifying) glycogen-accumulating organisms (D)GAO leads to full granulation (at day 200, SVI10 = 47...
July 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28718017/occurrence-and-transformations-of-carbon-nitrogen-and-phosphorus-related-to-particle-size-fraction-of-sweet-potato-starch-wastewater-during-hydrolytic-acidification-processes
#8
Haixiao Zhu, Long Qin, Yue Hu, Dongyang Wei, Zibin Hai, Aimin Li, Xianchuan Xie, Chao Han
Sweet potato starch wastewater (SPSW) is an industrial food-processing waste product, which is a significant pollution source due to its high chemical oxygen demand (COD), nitrogen, and phosphorus loads. The influence of hydrolytic acidification (HA) process on C, N, and P as well as other main parameters were evaluated. It is essential to treat these wastewaters with effective methods such as HA, a general pretreatment application. In this study, we investigate the scientific link between the changes of different fractions of C, N, and P with particle size distribution in response to the newly introduced HA process...
July 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28716488/simultaneous-anaerobic-transformation-of-carbon-tetrachloride-to-carbon-dioxide-and-tetrachloroethene-to-ethene-in-a-continuous-flow-column
#9
Mohammad F Azizian, Lewis Semprini
The simultaneous anaerobic transformation of tetrachloroethene (PCE) and carbon tetrachloride (CT) was evaluated in a continuous flow column. The column was packed with quartz sand and bioaugmented with the Evanite culture (EV) that is capable of transforming PCE to ethene. Azizian and Semprini (2016) reported that PCE and CT could be simultaneously transformed in the column, with PCE (0.1mM) transformed mainly to ethene and CT (0.015mM) to chloroform (CF) (20%) and an unknown transformation product, likely carbon dioxide (CO2)...
July 6, 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/28715769/high-throughput-profiling-and-analysis-of-antibiotic-resistance-genes-in-east-tiaoxi-river-china
#10
Ji Zheng, Ruixia Gao, Yuanyuan Wei, Tao Chen, Jiqing Fan, Zhenchao Zhou, Tiimub Benjamin Makimilua, Yanan Jiao, Hong Chen
The rapid human activities and urbanization exacerbate the human health risks induced by antibiotic resistance genes (ARGs). In this study, the profiling of ARGs was investigated using high-throughput qPCR from water samples of 13 catchment areas in East Tiaoxi River, China. High prevalence of ARGs indicated significant antibiotic resistance pollution in the research area (absolute abundance: 6.1 × 10(8)-2.1 × 10(10) copies/L; relative abundance: 0.033-0.158 copies/cell). Conventional water qualities (COD, TN, TP, NH3-N), bacterial communities and mobile gene elements (MGEs) were detected and analyzed as factors of ARGs shift...
July 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715738/inhibition-of-ammonia-on-anaerobic-digestion-of-synthetic-coal-gasification-wastewater-and-recovery-using-struvite-precipitation
#11
Wei Wang, Xuesong Ren, Kai Yang, Zhenhu Hu, Shoujun Yuan
Coal gasification wastewater (CGW) contains very high concentrations of phenols and ammonia. However, the potential impact of ammonia on the anaerobic digestion of phenols remained unclear. Firstly, the methanogens and phenols degraders had a good tolerance up to 1gL(-1) of total ammonia nitrogen (TAN), but the substrate utilization rate for phenol, and specific methanogenic activity of sludge were decreased by 89% and 67% at 5g TAN L(-1), and 94% and 100% at 10g TAN L(-1), respectively. Secondly, the optimum struvite crystallization conditions (pH=8...
July 3, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28712830/antioxidant-defenses-in-polar-cod-boreogadus-saida-and-responsiveness-toward-dietary-crude-oil-exposure
#12
Ireen Vieweg, Maura Benedetti, Ilaria Lanzoni, Francesco Regoli, Jasmine Nahrgang
Increasing anthropogenic activities in the Arctic pose the risk for accidental oil spills but our knowledge of ecotoxicological effects is still limited for Arctic organisms. This study aimed to provide insights in baseline levels of antioxidants in polar cod (Boreogadus saida) from different Arctic locations and investigate the susceptibility of this species to oxidative stress during a 32 day dietary crude oil exposure. Baseline levels of individual antioxidants and total oxyradical scavenging capacity (TOSC) varied among different Arctic fjords...
June 13, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28712337/overall-effect-of-carbon-production-and-nutrient-release-in-sludge-holding-tank-on-mainstream-biological-nutrient-removal-efficiency
#13
Pouria Jabari, Qiuyan Yuan, Jan A Oleszkiewicz
The objective of this study was to assess the potential of hydrolysis/fermentation of activated sludge in sludge holding tank (SHT) to produce additional carbon for biological nutrient removal (BNR) process. The study was conducted in anaerobic batch tests using the BNR sludge (from a full-scale Westside process) and the mixture of BNR sludge with conventional non-BNR activated sludge (to have higher biodegradable particulate COD (bpCOD) in sludge). At different times during the batch tests the nutrient release, filtered COD (FCOD) production and polyphosphate (poly-P) and aerobic phosphorous uptake of sludge were measured...
July 17, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28712332/comparison-of-commercial-baker-s-yeast-versus-bacteria-based-membrane-bioreactors-for-landfill-leachate-treatment
#14
M C S Amaral, G C B Brito, B G Reis, L C Lange, W G Moravia
This paper compares the performance of the membrane bioreactor (MBR) inoculated with commercial baker's yeast (Saccharomyces cerevisiae) (MBRy) versus one inoculated with bacterial sludge (MBRb) for treatment of landfill leachate (LFL). The MBRb and MBRy were operated with a hydraulic retention time (HRT) of 48 h, solids retention time (SRT) of 60 d, and specific air demand based on membrane area (SADm) of 0.6 m(3) h(-1) m(-2). The MBRy was more efficient in removing COD (68 ± 12%), color (79 ± 8%), ammoniacal nitrogen (58 ± 18%), and phosphorus (62 ± 19%) compared to MBRb, which showed removal efficiencies of 44 ± 18%, 46 ± 20%, 45 ± 17%, and 29 ± 15% for COD, color, ammoniacal nitrogen, and phosphorus...
July 17, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28712032/copper-stressed-anaerobic-fermentation-biogas-properties-process-stability-biodegradation-and-enzyme-responses
#15
He Hao, Yonglan Tian, Huayong Zhang, Yang Chai
The effect of copper (added as CuCl2) on the anaerobic co-digestion of Phragmites straw and cow dung was studied in pilot experiments by investigating the biogas properties, process stability, substrate degradation and enzyme activities at different stages of mesophilic fermentation. The results showed that 30 and 100 mg/L Cu(2+) addition increased the cumulative biogas yields by up to 43.62 and 20.77% respectively, and brought forward the daily biogas yield peak, while 500 mg/L Cu(2+) addition inhibited biogas production...
July 15, 2017: Biodegradation
https://www.readbyqxmd.com/read/28711803/investigation-on-the-response-of-anaerobic-membrane-bioreactor-to-temperature-decrease-from-25%C3%A2-c-to-10%C3%A2-c-in-sewage-treatment
#16
Ryoya Watanabe, Yulun Nie, Shinichiro Wakahara, Daisuke Komori, Yu-You Li
Anaerobic membrane bioreactor (AnMBR) for sewage treatment was operated for 650days with the decrease of temperature from 25°C to 10°C. At higher temperature >15°C, COD removal was above 94% while sewage treatment efficiency and relevant CH4 production decreased below 15°C. The effluent COD at 10°C was 134mg/L at HRT of 16h. Moreover, low temperature can result in a higher membrane fouling rate due to the microbial self-protection behavior in coping with the temperature decrease by releasing soluble microbial products (SMP) and extracellular polymeric substances (EPS)...
July 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28711802/two-stage-anoxic-oxic-combined-membrane-bioreactor-system-for-landfill-leachate-treatment-pollutant-removal-performances-and-microbial-community
#17
Jianbo Liu, Haibo Zhang, Panyue Zhang, Yan Wu, Xiying Gou, Yonghui Song, Zhiyong Tian, Guangming Zeng
In this study, a laboratory-scale two-stage anoxic/oxic (A/O) combined membrane bioreactor (MBR) was operated for 113d for the treatment of landfill leachate. The average removal of chemical oxygen demand (COD), ammonia (NH4(+)-N) and total nitrogen (TN) achieved 80.60%, 99.04% and 74.87%, respectively. A mass balance evaluation suggested that the removal of COD, NH4(+)-N and TN occurred mainly in the second A/O process, and the total removal capacity of COD, NH4(+)-N and TN were 125.60g/d, 24.35g/d and 22...
July 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28710731/effects-of-salinity-c-s-ratio-s-n-ratio-on-the-besi-process-and-treatment-of-nanofiltration-concentrate
#18
Chao Wei, Li Wei, Chunying Li, Dong Wei, Yunfa Zhao
A laboratory-scale biodegradation and electron transfer based on the sulfur metabolism in the integrated (BESI(®)) process was used to treat a saline petrochemical nanofiltration concentrate (NFC). The integrated process consisted of activated sludge sulfate reduction (SR), and sulfide oxidation (SO) reactors, and a biofilm nitrification reactor. During the process, the total removal efficiencies of chemical oxygen demand (COD), ammonia nitrogen, and total nitrogen (TN) were 76.2, 83.8, and 73.1%, respectively...
July 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28710391/screening-of-microalgae-for-integral-biogas-slurry-nutrient-removal-and-biogas-upgrading-by-different-microalgae-cultivation-technology
#19
Xue Wang, Keting Bao, Weixing Cao, Yongjun Zhao, Chang Wei Hu
The microalgae-based technology has been developed to reduce biogas slurry nutrients and upgrade biogas simultaneously. In this work, five microalgal strains named Chlorella vulgaris, Scenedesmus obliquus, Selenastrum capricornutum, Nitzschia palea, and Anabaena spiroides under mono- and co-cultivation were used for biogas upgrading. Optimum biogas slurry nutrient reduction could be achieved by co-cultivating microalgae (Chlorella vulgaris, Scenedesmus obliquus, and Nitzschia palea) with fungi using the pelletization technology...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28709102/adsorption-and-degradation-of-14-c-bisphenol-a-in-a-soil-trench
#20
Jian Shen, Xin-Ze Wang, Zhen Zhang, Yan-Ming Sui, Hai-Lu Wu, Ji-Meng Feng, Xin-Nan Tong, Zhen-Yu Zhang
Bisphenol A (BPA) has caused widespread concern among scholars as a result of its estrogenic toxicity. It exists mainly in natural waters, sediments, and soil, as well as sewage and wastewater sludge. Considering that BPA is a common environmental pollutant that is removed along with chemical oxygen demand (COD), nitrogen, and phosphorus in drainage treatment systems, it is important to research the fate of BPA in sewage treatment systems. In this research, laboratory batch experiments on soil degradation and adsorption were conducted with (14)C-BPA, aiming to discuss the transport and degradation characteristics of BPA in both simulated facilities and a soil trench...
July 11, 2017: Science of the Total Environment
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