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https://www.readbyqxmd.com/read/28737078/effect-heating-dwell-time-has-on-the-retention-of-heavy-metals-in-the-structure-of-lightweight-aggregates-manufactured-from-wastes
#1
Beatriz González-Corrochano, Jacinto Alonso-Azcárate, Luis Rodríguez, Agripino Pérez Lorenzo, María Fernández Torío, Juan José Tejado Ramos, María Dolores Corvinos, Carlos Muro
The main objective of this paper was to study how effective thermal treatment is in the retention of different heavy metals (HMs) within the structure of artificial lightweight aggregates (LWAs). These LWAs were manufactured by washing aggregate sludge and sewage sludge. The consequence of increasing the heating dwell time whilst manufacturing these LWAs was also determined. Partitioning of the HMs (Cr, Ni, Cu, Zn, Cd and Pb) in both the waste raw materials and in the LWAs was studied by means of the optimized BCR sequential extraction procedure with lithium metaborate in the final fusion...
July 24, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28735468/the-effect-of-water-contamination-and-host-related-factors-on-ectoparasite-load-in-an-insectivorous-bat
#2
Carmi Korine, Shai Pilosof, Amit Gross, Juan B Morales-Malacara, Boris R Krasnov
We examined the effects of sex, age, and reproductive state of the insectivorous bat Pipistrellus kuhlii on the abundance and prevalence of arthropod ectoparasites (Macronyssidae and Cimicidae) in habitats with either sewage-polluted or natural bodies of water, in the Negev Desert, Israel. We chose water pollution as an environmental factor because of the importance of water availability in desert environments, particularly for P. kuhlii, which needs to drink on a daily basis. We predicted that parasite infestation rates would be affected by both environment and demographic cohort of the host...
July 22, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28735334/detection-of-polioviruses-in-sewage-using-cell-culture-and-molecular-methods
#3
Agnieszka Figas, Magdalena Wieczorek, Bogumiła Litwińska, Włodzimierz Gut
The work presented here demonstrates the utility of a two-step algorithm for environmental poliovirus surveillance based on: preselection of sewage samples tested for the presence of enteroviral genetic material-RT-PCR assay and detection of infectious viruses by cell culture technique (L20B for polioviruses and RD for polio and other non-polio enteroviruses). RD and L20B cell lines were tested to determine their sensitivity for isolation of viruses from environmental samples (sewage). Finally, we wanted to determine if sewage concentration affects the results obtained for RT-PCR and cell cultures...
January 2, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/28734218/the-evaluation-of-polycyclic-aromatic-hydrocarbons-pahs-biodegradation-kinetics-in-soil-amended-with-organic-fertilizers-and-bulking-agents
#4
Dariusz Włóka, Agnieszka Placek, Agnieszka Rorat, Marzena Smol, Małgorzata Kacprzak
The aim of this study was to investigate the polycyclic aromatic hydrocarbons (PAHs) biodegradation kinetics in soils fertilized with organic amendments (sewage sludge, compost), bulking agents (mineral sorbent, silicon dioxide in form of nano powder), and novel compositions of those materials. The scope of conducted works includes a cyclic CO2 production measurements and the determinations of PAHs content in soil samples, before and after 3-months of incubation. Obtained results show that the use of both type of organic fertilizers have a positive effect on the PAHs removal from soil...
July 19, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28734212/treatment-of-refractory-contaminants-by-sludge-derived-biochar-persulfate-system-via-both-adsorption-and-advanced-oxidation-process
#5
Jia Wang, Zhuwei Liao, Jerosha Ifthikar, Lerong Shi, Yunan Du, Jingyi Zhu, Shuang Xi, Zhuqi Chen, Zhulei Chen
A novel strategy for the removal of refractory organic contaminants was realized through sludge-derived biochar (SDBC)/persulfate (PS) system via both adsorption and advanced oxidation process under ambient conditions. SDBC was prepared by one single step of slow pyrolysis of municipal sewage sludge, appeared a porous structure, and contained abundant oxygen-containing functional groups as well as amorphous Fe species. Large surface area and porous structure of SDBC benefitted the adsorption and enrichment of contaminants, while oxygen-containing functional groups and Fe species on the surface were considered as reactive components for the activation of PS...
July 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28734182/using-medically-derived-iodine-131-to-track-sewage-effluent-in-the-laurentian-great-lakes
#6
Michael P Montenero, Elizabeth K Dilbone, James T Waples
Tracking sewage wastewater in a large lake is difficult. Concentrations of pharmaceuticals that can be used as indicator compounds are quickly diluted and not easy to measure. In this study, we examined the potential of using medically-derived iodine-131 ((131)I, t½ = 8.02 d) as a tracer for Milwaukee sewage effluent in Lake Michigan. (131)I activities in sewage effluent from two Milwaukee wastewater treatment plants (WWTPs) were measured in conjunction with (131)I activities in water, sediment and biota in the Milwaukee Outer Harbor and Lake Michigan...
July 14, 2017: Water Research
https://www.readbyqxmd.com/read/28732397/combined-sewer-overflow-events-and-childhood-emergency-department-visits-a-case-crossover-study
#7
Cole Brokamp, Andrew F Beck, Louis Muglia, Patrick Ryan
In localities with combined sewer systems, combined sewer overflow (CSO) events frequently occur following high precipitation and can result in the release of untreated sewage and industrial wastewater into surface waters. We hypothesized that either direct contact with or proximity to aerosolized CSO effluent would increase the risk for childhood emergency department (ED) visits for asthma, gastrointestinal (GI) illnesses, and skin and soft tissue infections (SSTIs) in Cincinnati, OH, USA. ED visits for 2010-2014 due to GI diseases, asthma, and SSTIs were extracted from the Cincinnati Children's Hospital Medical Center electronic health records...
July 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28732337/critical-review-of-soil-contamination-by-polybrominated-diphenyl-ethers-pbdes-and-novel-brominated-flame-retardants-nbfrs-concentrations-sources-and-congener-profiles
#8
REVIEW
Thomas J McGrath, Andrew S Ball, Bradley O Clarke
Polybrominated diphenyl ethers (PBDEs) have been used in a broad array of polymeric materials such as plastics, foams, resins and adhesives to inhibit the spread of fires since the 1970s. The widespread environmental contamination and well documented toxic effects of PBDEs have led to bans and voluntary withdrawals in many jurisdictions. Replacement novel brominated flame retardants (NBFRs) have, however, exhibited many of the same toxic characteristics as PBDEs and appear to share similar environmental fate...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28726708/potential-of-integrated-vertical-and-horizontal-flow-constructed-wetland-with-native-plants-for-sewage-treatment-under-different-hydraulic-loading-rates
#9
Xuan Cuong Nguyen, Dinh Duc Nguyen, Nguyen Thi Loan, Soon Woong Chang
In this study, a pilot-scale integrated constructed wetland with vertical flow (VF) and horizontal flow (HF) in series was designed and investigated to evaluate sewage wastewater treatment capacity. The VF unit was planted with Canna indica and was 1.2 m long, 1.2 m wide, and 1.2 m high; whereas the HF unit contained Colocasia esculenta and was 3.0 m long, 1.0 m wide, and 1.0 m high. The system was operated under different hydraulic loading rates (HLRs) of 0.1, 0.2, and 0.15 m/d. The effluent concentrations differed as HLR changed, and the means were total suspended solids (TSS): 87 mg/L; biological oxygen demand (BOD5): 31 mg/L; chemical oxygen demand (CODCr): 59 mg/L; ammonium nitrogen (NH4-N): 5...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726701/sewage-sludge-and-waterworks-sludge-stabilization-in-sludge-treatment-reed-bed-systems
#10
Grazia Masciandaro, Eleonora Peruzzi, Steen Nielsen
In this study, results about sludge stabilization in sludge treatment reed bed (STRB) systems in two different systems, Hanningfield STRB 1 (England), treating waterworks sludge, and Stenlille STRB 2 (Denmark), treating surplus activated sludge, are presented. The study mainly focused on the effectiveness of the STRBs systems in stabilizing sludge organic matter; in fact, parameters correlated to biochemical and chemico-structural properties of organic sludge matter were determined. Dewatering and sludge stabilization were effective in both STRBs, as highlighted by total and volatile dry solids trend...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726561/characteristics-of-the-microwave-pyrolysis-and-microwave-co2-assisted-gasification-of-a-dewatered-sewage-sludge
#11
Young Nam Chun, Byeo Ri Jeong
Microwave drying-pyrolysis or drying-gasification characteristics was examined to convert sewage sludge into energy and resources. The gasification was carried out with carbon dioxide as a gasifying agent. The examination results were compared with those of the conventional heating-type electric furnace to compare both product characteristics. Through the pyrolysis or gasification, gas, tar and char were generated as products. The produced gas was the largest component of each process followed by the sludge char and the tar...
July 20, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28726227/modelling-the-effects-of-water-diversion-and-combined-sewer-overflow-on-urban-inland-river-quality
#12
Xianyong Gu, Zhenliang Liao, Guangqian Zhang, Jiaqiang Xie, Jin Zhang
In order to assist and optimize the operation of a clean water diversion project for the medium-sized inland rivers in Chaohu, China, an integrated hydrodynamic and water quality model was used in this study. Sixteen diversion scenarios and five sewage interception scenarios were defined to assess the improvement of water quality parameters including ammonia nitrogen (NH3-N), total phosphorus (TP) and chemical oxygen demand (COD) under different diverted water flows, diverting times, diverting points, diverting routines and sewage interception proportions...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28724443/metagenomics-of-urban-sewage-identifies-an-extensively-shared-antibiotic-resistome-in-china
#13
Jian-Qiang Su, Xin-Li An, Bing Li, Qing-Lin Chen, Michael R Gillings, Hong Chen, Tong Zhang, Yong-Guan Zhu
BACKGROUND: Antibiotic-resistant pathogens are challenging treatment of infections worldwide. Urban sewage is potentially a major conduit for dissemination of antibiotic resistance genes into various environmental compartments. However, the diversity and abundance of such genes in wastewater are not well known. METHODS: Here, seasonal and geographical distributions of antibiotic resistance genes and their host bacterial communities from Chinese urban sewage were characterized, using metagenomic analyses and 16S rRNA gene-based Illumina sequencing, respectively...
July 19, 2017: Microbiome
https://www.readbyqxmd.com/read/28721615/phycoremediation-potential-of-marine-microalga-tetraselmis-indica-on-secondary-treated-domestic-sewage-for-nutrient-removal-and-biodiesel-production
#14
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/28720767/assessment-of-the-occurrence-spatiotemporal-variations-and-geoaccumulation-of-fifty-two-inorganic-elements-in-sewage-sludge-a-sludge-management-revisit
#15
Fidèle Suanon, Qian Sun, Xiaoyong Yang, Qiaoqiao Chi, Sikandar I Mulla, Daouda Mama, Chang-Ping Yu
The limited information about the sludge quality has made its management a top environmental challenge. In the present study, occurrence and the spatiotemporal variations of 52 inorganic elements were investigated in the sludge samples from three wastewater treatment plants (WWTPs) in Xiamen city, China. The results showed, the occurrence of 49 elements with the concentrations in the range of >125-53500 mg kg(-1) dry sludge (DS) for commonly used industrial metals, 1.22-14.0 mg kg(-1) DS for precious metals, and 1...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720083/a-prolonged-community-wide-cholera-outbreak-associated-with-drinking-water-contaminated-by-sewage-in-kasese-district-western-uganda
#16
Benon Kwesiga, Gerald Pande, Alex Riolexus Ario, Nazarius Mbona Tumwesigye, Joseph K B Matovu, Bao-Ping Zhu
BACKGROUND: In May 2015, a cholera outbreak that had lasted 3 months and infected over 100 people was reported in Kasese District, Uganda, where multiple cholera outbreaks had occurred previously. We conducted an investigation to identify the mode of transmission to guide control measures. METHODS: We defined a suspected case as onset of acute watery diarrhoea from 1 February 2015 onwards in a Kasese resident. A confirmed case was a suspected case with Vibrio cholerae O1 El Tor, serotype Inaba cultured from a stool sample...
July 18, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28719657/isolation-and-in-vitro-evaluation-of-bacteriophages-against-mdr-bacterial-isolates-from-septic-wound-infections
#17
Roja Rani Pallavali, Vijaya Lakshmi Degati, Dakshayani Lomada, Madhava C Reddy, Vijaya Raghava Prasad Durbaka
Multi-drug resistance has become a major problem for the treatment of pathogenic bacterial infections. The use of bacteriophages is an attractive approach to overcome the problem of drug resistance in several pathogens that cause fatal diseases. Our study aimed to isolate multi drug resistant bacteria from patients with septic wounds and then isolate and apply bacteriophages in vitro as alternative therapeutic agents. Pus samples were aseptically collected from Rajiv Gandhi Institute of Medical Science (RIMS), Kadapa, A...
2017: PloS One
https://www.readbyqxmd.com/read/28718022/identifying-nitrate-sources-and-transformations-in-taizi-river-basin-northeast-china
#18
Yanli Li, Yanfen Li, Tongqian Zhao, Wei Sun, Zirui Yang
The nitrate (NO3(-)) pollution of aquatic systems in Northeast China is a severe problem. To identify NO3(-) sources and transformations in different zones with different land uses in the Taizi River Basin, ion-exchange methods were utilized to determine the concentrations and isotopic compositions (δ(15)N and δ(18)O) of NO3(-) and chloride (Cl(-)). Results showed that Cl(-) concentrations ranged from 2.7 to 73.4 mg/L. Cl(-) concentrations were the highest in zone 8 and the lowest in zone 1. NO3(-) concentrations ranged from 0...
July 17, 2017: Environmental Science and Pollution Research International
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
#19
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/28711801/effect-of-different-nitrogen-fertilizer-treatments-on-the-conversion-of-miscanthus%C3%A3-giganteus-to-ethanol
#20
Bogdan Dubis, Katarzyna Bułkowska, Małgorzata Lewandowska, Władysław Szempliński, Krzysztof Józef Jankowski, Jakub Idźkowski, Natalia Kordala, Karolina Szymańska
Miscanthus×giganteus is a perennial rhizomatous grass which is used as a biofuel crop. Due to its high yields, low production costs, resistance to low temperatures, low soil requirements and, above all, high cellulose content, miscanthus can be a useful resource for ethanol production. The aim of this study was to determine the effect of two fertilization regimes (sewage sludge/mineral NPK) during miscanthus cultivation on the chemical composition of biomass, the content of major lignocellulosic factions and the effectiveness of miscanthus conversion to bioethanol...
July 4, 2017: Bioresource Technology
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