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https://www.readbyqxmd.com/read/28631220/applicability-of-upflow-anaerobic-sludge-blanket-and-dynamic-membrane-coupled-process-for-the-treatment-of-municipal-wastewater
#1
Pei Jun Quek, Tsuey Shan Yeap, How Yong Ng
This study investigated the applicability of dynamic membrane filter (DMF) technology in an upflow anaerobic sludge blanket (UASB) and DMF-coupled process for the treatment of municipal wastewater. The overall treatment performance and effects of hydraulic retention time (HRT), operating flux, and mesh pore size on the UASB + DMF were assessed. The UASB + DMF-coupled process demonstrated removal efficiencies of over 64 and 86% for TCOD and TSS, respectively. The effects of filtration flux and support mesh pore size were investigated and it was found that while there was little impact on the treatment performance, a 67% increase in operating flux resulted in a 25% increase in fouling rate...
June 19, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28629696/new-criteria-to-determine-the-destabilization-of-the-acidogenic-anaerobic-co-digestion-of-organic-fraction-of-municipal-solid-waste-ofmsw-with-mixed-sludge-ms
#2
R Angeriz-Campoy, L A Fdez-Güelfo, Vinay Kumar Tyagi, C J Álvarez-Gallego, L I Romero-García
Effect of hydraulic retention time (HRT) on bio-hydrogen production from co-digestion of organic fraction of municipal solid waste (OFMSW) and mixed sludge (MS) in dry thermophilic conditions (55°C and 20% total solids) was investigated. A decreasing sequence of six HRTs, from 2.9 to 0.8-days, was performed to evaluate the stability of the system and the influence of HRT on the organic matter solubilization, the daily hydrogen production (HP) and the specific hydrogen production (SHP). Best results were obtained operating at 1...
June 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28629111/volatile-fatty-acid-production-dynamics-during-the-acidification-of-pretreated-olive-mill-wastewater
#3
Canan Can Yarimtepe, Nilgün Ayman Oz, Orhan Ince
This study focuses on the dynamics of VFA production from pretreated olive mill wastewater (OMW). Acidogenic anaerobic sequencing batch reactors (AcASBR) were operated with the pretreated OMW at hydraulic retention time (HRT) of 2days and pH of 5,5 for different organic loading rates (OLRs) ranging from 5gCOD/L.d to 40gCOD/L.d. VFA production reached to the highest value of about 27,000mg/L with the increase in the organic load applied (20gCOD/L.d). The highest acidification rate was calculated as 68%. Acetic acid was found to be as the dominant VFA compound for all stage of the study...
May 31, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28629104/efficient-2-4-dichloronitrobenzene-removal-in-the-coupled-bes-uasb-reactor-effect-of-external-voltage-mode
#4
Hui Chen, Xinyi Gao, Caiqin Wang, Junjie Shao, Xiangyang Xu, Liang Zhu
In this study, bioelectrochemical-upflow anaerobic sludge blanket (BES-UASB) system was developed for treatment of 2,4-dichloronitrobenzen (DClNB) containing wastewater to investigate the effect of external voltage with different supplying modes. Results showed that 2,4-dichloroaniline (DClAN) was under detection limit in R1 (applied with intermittent voltage) and R2 (applied with continuous voltage) when the DClNB loading increased from 25 to 100gm(3)d(-1) (hydraulic retention time (HRT) was decreased from 24 to 6h) while sudden accumulation of DClAN (1...
June 15, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28629102/bioelectrochemical-approach-for-control-of-methane-emission-from-wetlands
#5
Shentan Liu, Xiaojuan Feng, Xianning Li
To harvest electricity and mitigate methane emissions from wetlands, a novel microbial fuel cell coupled constructed wetland (MFC-CW) was assembled with an anode placing in the rhizosphere and a cathode on the water surface. Plant-mediated methane accounted for 71-82% of the total methane fluxes. The bioanode served as an inexhaustible source of electron acceptors and resulted in reduced substantial methane emissions owing to electricigens outcompeting methanogens for carbon and electrons when substrate was deficient...
June 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28617189/stability-of-continuous-and-fed-batch-sequential-anaerobic-anoxic-aerobic-moving-bed-bioreactor-systems-at-phenol-shock-load-application
#6
Biju Prava Sahariah, J Anandkumar, Saswati Chakraborty
In this study, stability of two sequential moving bed bioreactor systems for phenol shock load (PSL) applications was assessed in presence of thiocyanate and ammonia. The systems were operated in anaerobic-anoxic-aerobic continuous (CMBR: R1-R2-R3) and semi-continuous (FMBR: B1-B2-B3) mode. Both systems were exposed to 3000 mg phenol/L (PSL-I) and 3500 mg phenol/L (PSL-II) for 3 days each from initial 2500 mg phenol/L without any intermediate concentration at 6 days HRT. The effect of PSL-I on R1 was reversible within 10-12 days...
June 15, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28615185/hormone-replacement-treatment-choices-in-complete-androgen-insensitivity-syndrome-an-audit-of-an-adult-clinic
#7
Jennifer K Y Ko, Thomas F J King, Louise Williams, Sarah M Creighton, Gerard S Conway
OBJECTIVE: To review the treatment choices of women with Complete Androgen Insensitivity Syndrome (CAIS) at a single tertiary centre. DESIGN: Retrospective review Patients: Women with CAIS identified from our database. RESULTS: The study group comprised 141 women with CAIS. Eleven percent of women had gonads in situ, 3 of which were under workup for gonadectomy. The age of gonadectomy in the remainder was 17 (0.1-53) years old. The most common form of HRT was oral oestrogen or transdermal oestrogen in 80%...
June 14, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28614265/prognostic-value-of-tumor-volume-and-radiation-dose-in-moderate-sized-hepatocellular-carcinoma-a-multicenter-analysis-in-korea-krog-14-17
#8
Myungsoo Kim, Chul Seung Kay, Won Il Jang, Mi-Sook Kim, Dong Soo Lee, Hong Seok Jang
The purpose of this study is to investigate the prognostic value of tumor volume and radiation dose for predicting treatment outcomes in moderate-sized hepatocellular carcinoma (HCC).A total of 72 patients with unresectable HCC ranging in size from 5 to 10 cm were treated with high-dose radiotherapy including hypofractionated radiotherapy (HRT) and stereotactic body radiotherapy (SBRT), in 3 institutions from 2003 to 2013. The HRT doses ranged from 33 to 60 Gy in 3 to 10 fractions. The primary endpoint was local progression-free survival (PFS); the secondary endpoints were overall PFS, overall survival (OS), and treatment toxicity...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28611718/barking-up-the-wrong-tree-why-and-how-we-may-need-to-revise-alcohol-addiction-therapy
#9
Ann-Kathrin Stock
One of the main characteristics of alcohol abuse and addiction is the loss of control over alcohol intake and the continuation of drinking in the face of negative consequences. Mounting evidence strongly suggests that an alcohol-induced imbalance between goal-directed and habitual behavior may be one of the main driving factors of this key feature of addiction and furthermore play a key role in staying abstinent. Current therapies often focus only on deficient inhibitory control (i.e., goal-directed behavior), but largely neglect the potential of the well-functioning habit formation found in patients...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28602662/biomethanation-macrodynamics-of-vegetable-residues-pretreated-by-low-frequency-microwave-irradiation
#10
Sanmooga Savoo, Ackmez Mudhoo
The effects of microwave irradiation on the digestibility and biogas production of cauliflower (Brassica oleracea var. botrytis) and cabbage (Brassica oleracea var. capitata) leaves were investigated using biochemical methane potential (BMP) assays. Cow dung was utilised as inoculum. Different microwave powers (87.5, 175 and 350W) were applied in a first set of runs for 15min. The second set consisted of 20, 25 and 30min irradiation at 350W. Based on ANOVA analysis (α=0.05), biogas production was significantly higher for the irradiated substrates compared to controls...
June 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28601917/hormone-replacement-therapy-and-breast-cancer-survival-a-systematic-review-and-meta-analysis-of-observational-studies
#11
REVIEW
Xinnian Yu, Siying Zhou, Jinyan Wang, Qian Zhang, Junchen Hou, Lingping Zhu, Yunjie He, Jianhua Zhao, Shanliang Zhong
Previous studies on the association between hormone replacement therapy (HRT) and breast cancer survival have yielded mixed results. We aimed to perform a meta-analysis to assess the association with all available studies. Relevant studies were identified by searching PubMed and EMBASE to April 2017. We calculated the summary hazard ratios (HRs) and 95% confidence intervals (CIs) using random-effects models. The dose-response relationship was assessed by random-effects meta-analysis and dose-response meta-regression models...
June 10, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/28599225/performance-of-autotrophic-nitrogen-removal-from-digested-piggery-wastewater
#12
Shuang Wang, Lan Wang, Liangwei Deng, Dan Zheng, Yunhong Zhang, Yiqi Jiang, Hongnan Yang, Yunhui Lei
The performance of an autotrophic nitrogen removal process to treat digested piggery wastewater (DPW) was investigated by gradually shortening the HRT and enhancing the DPW concentration during 390days of operation. The results showed that the total nitrogen removal rate and efficiency reached 3.9kg-Nm(-3)day(-1) and 73%, which were significantly higher than the levels reported previously. A high relative abundance of Nitrosomonas (4.2%) and functional microbes (12.15%) resulted in a high aerobic ammonium oxidizing activity (1...
May 29, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28595913/performance-and-design-considerations-for-an-anaerobic-moving-bed-biofilm-reactor-treating-brewery-wastewater-impact-of-surface-area-loading-rate-and-temperature
#13
A di Biase, T R Devlin, M S Kowalski, J A Oleszkiewicz
Three 4 L anaerobic moving bed biofilm reactors (AMBBR) treated brewery wastewater with AC920 media providing 680 m(2) protected surface area per m(3) of media. Different hydraulic retention times (HRT; 24, 18, 12, 10, 8 and 6 h) at 40% media fill and 35 °C, as well as different temperatures (15, 25 and 35 °C) at 50% media fill and 18 h HRT were examined. Best performance at 35 °C and 40% media fill was observed when HRT was 18 h, which corresponded with 92% removal of soluble COD (sCOD). Organic loading rates (OLR) above 24 kg-COD m(-3)d(-1) decreased performance below 80% sCOD removal at 35 °C and 40% media fill...
June 5, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28592226/removal-of-sulfate-and-heavy-metals-by-sulfate-reducing-bacteria-in-an-expanded-granular-sludge-bed-reactor
#14
Zhuxiang Liu, Lihua Li, Zhaoyang Li, Xiangrong Tian
The objective of this study is to utilize an expanded granular sludge bed reactor for removing heavy metals and sulfate from synthetic acid-mine drainage (AMD) using sewage sludge fermentation centrate as the substrate. The reactor was bioaugmented with an enriched consortium of sulfate-reducing bacteria (SRB). The bioreactor performance was studied with different chemical oxygen demand [Formula: see text] ratios, liquid upflow velocity (Vup), hydraulic retention time (HRT) and influent pH. The highest COD, sulfate and heavy metal removal efficiencies were achieved at a [Formula: see text] ratio of 1...
June 20, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28592192/pyridine-influence-on-sequential-anaerobic-anoxic-aerobic-fmbr-system-for-phenol-thiocyanate-and-ammonia-removal
#15
Biju Prava Sahariah, J Anandkumar, Saswati Chakraborty
A synthetic wastewater containing various pyridine concentrations (25-250 mg/L) was treated in a sequential anaerobic(B1)-anoxic(B2)-aerobic(B3) fed batch moving bed reactor (FMBR) system. Pyridine was associated with phenol (1500 mg/L), SCN(-) (800 mg/L), COD (5400-5430 mg/L) and NH4(+)-N (500 mg/L) at hydraulic retention time (HRT) of 6 (B1: 3; B2 and B3: 1.5 each) days. In B1, pyridine removal was 10-12% with influent concentration 25-100mg/L and beyond it was zero. Removal of phenol (53-39%) and COD (33-22%) occurred in B1 but pyridine above 50 mg/L inhibited the COD and phenol removal...
June 8, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28590161/nitrogen-and-phosphorus-treatment-of-marine-wastewater-by-a-laboratory-scale-sequencing-batch-reactor-with-eco-friendly-marine-high-efficiency-sediment
#16
Seonghyeon Cho, Jinsoo Kim, Sungchul Kim, Sang-Seob Lee
We screened and identified a NH3-N-removing bacterial strain, Bacillus sp. KGN1 and a PO4(3-)-P removing strain, Vibrio sp. KGP1, from 960 indigenous marine isolates from seawater and marine sediment from Tongyeong, South Korea. We developed eco-friendly high-efficiency marine sludge (eco-HEMS), and inoculated these marine bacterial strains into the marine sediment. A laboratory-scale sequencing batch reactor (SBR) system using the eco-HEMS for marine wastewater from land-based fish farms improved the treatment performance as indicated by 88...
June 7, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28589134/effect-of-hydraulic-retention-time-on-anaerobic-digestion-of-wheat-straw-in-the-semicontinuous-continuous-stirred-tank-reactors
#17
Xiao-Shuang Shi, Jian-Jun Dong, Jun-Hong Yu, Hua Yin, Shu-Min Hu, Shu-Xia Huang, Xian-Zheng Yuan
Three semicontinuous continuous stirred-tank reactors (CSTR) operating at mesophilic conditions (35°C) were used to investigate the effect of hydraulic retention time (HRT) on anaerobic digestion of wheat straw. The results showed that the average biogas production with HRT of 20, 40, and 60 days was 46.8, 79.9, and 89.1 mL/g total solid as well as 55.2, 94.3, and 105.2 mL/g volatile solids, respectively. The methane content with HRT of 20 days, from 14.2% to 28.5%, was the lowest among the three reactors...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28588277/effects-of-hydraulic-retention-time-on-adsorption-behaviours-of-eps-in-an-a-o-mbr-biofouling-study-with-qcm-d
#18
Xudong Wang, Botao Cheng, Cunrui Ji, Miao Zhou, Lei Wang
Extra-cellular polymeric substances (EPS) are a major cause of membrane fouling in membrane bioreactors (MBRs). In this study, an anoxic-oxic membrane bioreactor (A/O-MBR) was run continuously for 98 days. The runs were divided into three stages according to hydraulic retention time (HRT) (11.8, 12.5 and 14.3 h, respectively). EPS were extracted from the reactor under the different HRTs. A quartz crystal microbalance with dissipation monitoring (QCM-D) and Fourier transform infrared (FT-IR) were used to study the adherence layer structures and the adsorption behaviours of EPS on the membrane surface...
June 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28582972/the-impact-of-do-and-salinity-on-microbial-community-in-poly-butylene-succinate-denitrification-reactors-for-recirculating-aquaculture-system-wastewater-treatment
#19
Ya-Le Deng, Yun-Jie Ruan, Song-Ming Zhu, Xi-Shan Guo, Zhi-Ying Han, Zhang-Ying Ye, Gang Liu, Ming-Ming Shi
The interactions between environmental factors and bacterial community shift in solid-phase denitrification are crucial for optimum operation of a reactor and to achieve maximum treatment efficiency. In this study, Illumina high-throughput sequencing was applied to reveal the effects of different operational conditions on bacterial community distribution of three continuous operated poly(butylene succinate) biological denitrification reactors used for recirculating aquaculture system (RAS) wastewater treatment...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28580232/mineralization-of-a-sulfonated-textile-dye-reactive-red-31-from-simulated-wastewater-using-pellets-of-aspergillus-bombycis
#20
Razia Khan, M H Fulekar
BACKGROUND: Reactive Red 31, applied extensively in the commercial textile industry, is a hazardous and persistent azo dye compound often present in dye manufacturing and textile industrial effluents. Aspergillus bombycis strain was isolated from dye contaminated zones of Gujarat Industrial Development Corporation, Vatva, Ahmedabad, India. The decolorization potential was monitored by the decrease in maximum absorption of the dye using UV-visible spectroscopy. Optimization of physicochemical conditions was carried out to achieve maximum decolorization of Reactive Red 31 by fungal pellets...
2017: Bioresources and Bioprocessing
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