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https://www.readbyqxmd.com/read/28936755/comparison-of-control-strategies-for-single-stage-partial-nitrification-anammox-granular-sludge-reactor-for-mainstream-sewage-treatment-a-model-based-evaluation
#1
Jun Wu
The low ammonium concentration, low temperature, presence of organic matter, and large variation of influent ammonium load pose serious challenges for the application of PN/AMX (partial nitrification-anammox) reactor in the mainstream wastewater treatment. Previous mathematical simulation studies of PN/AMX granule reactor mainly concentrated on the steady-state modeling. The steady-state simulation cannot be used for developing control strategies under dynamic condition. In this study, four control strategies were evaluated on their abilities to minimize the impact of feed disturbances on autotrophic nitrogen removal in mainstream wastewater...
September 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28934335/genetic-diversity-of-entamoeba-novel-ribosomal-lineages-from-cockroaches
#2
Tetsuro Kawano, Mihoko Imada, Pennapa Chamavit, Seiki Kobayashi, Tetsuo Hashimoto, Tomoyoshi Nozaki
Our current taxonomic perspective on Entamoeba is largely based on small-subunit ribosomal RNA genes (SSU rDNA) from Entamoeba species identified in vertebrate hosts with minor exceptions such as E. moshkovskii from sewage water and E. marina from marine sediment. Other Entamoeba species have also been morphologically identified and described from non-vertebrate species such as insects; however, their genetic diversity remains unknown. In order to further disclose the diversity of the genus, we investigated Entamoeba spp...
2017: PloS One
https://www.readbyqxmd.com/read/28934127/removal-of-phenolic-compounds-from-water-using-sewage-sludge-based-activated-carbon-adsorption-a-review
#3
REVIEW
Nuhu Dalhat Mu'azu, Nabeel Jarrah, Mukarram Zubair, Omar Alagha
Due to their industrial relevance, phenolic compounds (PC) are amongst the most common organic pollutants found in many industrial wastewater effluents. The potential detrimental health and environmental impacts of PC necessitate their removal from wastewater to meet regulatory discharge standards to ensure meeting sustainable development goals. In recent decades, one of the promising, cost-effective and environmentally benign techniques for removal of PC from water streams has been adsorption onto sewage sludge (SS)-based activated carbon (SBAC)...
September 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28933019/effects-of-municipal-solid-waste-and-sewage-sludge-compost-based-growing-media-on-the-yield-and-heavy-metal-content-of-four-lettuce-cultivars
#4
Concetta Eliana Gattullo, Carlo Mininni, Angelo Parente, Francesco Fabiano Montesano, Ignazio Allegretta, Roberto Terzano
Compost has been recently suggested as an alternative to peat for the preparation of growing substrates in soilless cultivation systems. However, some physico-chemical properties of compost may reduce plant performance and endanger the quality of productions, in particular for possible heavy metal accumulation in edible parts. This study aims at evaluating the suitability of a municipal solid waste compost (MSWC) and a sewage sludge compost (SSC) as components of growing media for the soilless cultivation of lettuce (Lactuca sativa L...
September 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28932221/diversity-of-vibrio-navarrensis-revealed-by-genomic-comparison-veterinary-isolates-are-related-to-strains-associated-with-human-illness-and-sewage-isolates-while-seawater-strains-are-more-distant
#5
Keike Schwartz, Cindy Kukuc, Nadja Bier, Karin Taureck, Jens A Hammerl, Eckhard Strauch
Strains of Vibrio navarrensis are present in aquatic environments like seawater, rivers, and sewage. Recently, strains of this species were identified in human clinical specimens. In this study, V. navarrensis strains isolated from livestock in Germany were characterized that were found in aborted fetuses and/or placentas after miscarriages. The veterinary strains were analyzed using phenotypical and genotypical methods and compared to isolates from marine environments of the Baltic Sea and North Sea. The investigated phenotypical traits were similar in all German strains...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28926913/enhanced-methanogenic-degradation-of-cellulose-containing-sewage-via-fungi-methanogens-syntrophic-association-in-an-anaerobic-membrane-bioreactor
#6
Rong Chen, Yulun Nie, Nobuyuki Tanaka, Qigui Niu, Qian Li, Yu-You Li
An anaerobic membrane bioreactor was configured for methanogenic degradation of cellulose-containing sewage. The degradation performance and microbial changes were evaluated under five hydraulic retention times (HRTs). The results indicated the methane production was largely enhanced with 92.6% efficiency of chemical oxygen demand (COD) converting to methane and 80% proportion of methane in produced biogas, meanwhile the biomass yield presented the fewest at the shortest HRT 8h. Enhanced methane production with decreased biomass yield was attributed to an association between fungi and methanogens...
September 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28925595/determination-of-crassphage-in-water-samples-and-applicability-for-tracking-human-faecal-pollution
#7
Cristina García-Aljaro, Elisenda Ballesté, Maite Muniesa, Juan Jofre
In recent decades, considerable effort has been devoted to finding microbial source-tracking (MST) markers that are suitable to assess the health risks of faecally polluted waters, with no universal marker reported so far. In this study, the abundance and prevalence of a crAssphage-derived DNA marker in wastewaters of human and animal origins were studied by a new qPCR assay with the ultimate aim of assessing its potential as an MST marker. crAssphage showed up to 10(6) GC/ml in the sewage samples of human origin, in both the total DNA and the viral DNA fraction...
September 19, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28924692/sediment-core-data-reconstruct-the-management-history-and-usage-of-a-heavily-modified-urban-lake-in-berlin-germany
#8
Robert Ladwig, Lena Heinrich, Gabriel Singer, Michael Hupfer
Urban surface waters face several stressors associated with industry and urban water management. Over much of the past century, the wastewater treatment in Berlin, Germany, relied on inefficient sewage farms, which resulted in severe eutrophication and sediment contamination in the recipient surface waterbodies. A prominent example is Lake Tegel, where a multitude of management measures were applied in the last decades for the purpose of ecosystem restoration. In this study, we analyzed sediment cores of three lakes with X-ray fluorescence spectroscopy: Lake Tegel, Lake Großer Wannsee, which is environmentally similar but has a different management history, and Lake Userin, which serves as a reference located in a nature protection area...
September 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28923754/temporal-and-spatial-variations-of-polycyclic-aromatic-hydrocarbons-pahs-in-soils-from-a-typical-organic-sewage-irrigation-area
#9
Bo Wu, Shuhai Guo, Xiaojun Li, Jianing Wang
In the water shortage countries and areas, untreated sewage irrigation led to the extensive organic pollution of farmland soil, which seriously threatened environmental security. In this study, we selected Shenfu irrigation area (SIA) as the study area, and it was the first and largest organic sewage irrigation area in China. We analyzed the temporal and spatial variations in concentrations, risk and sources of polycyclic aromatic hydrocarbons (PAHs) in soil of the SIA. The results show that the PAH concentrations decreased slowly and environmental risk fluctuated after stopping sewage irrigation...
September 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28923753/concentration-and-spatial-distribution-of-organophosphate-esters-in-the-soil-sediment-profile-of-kathmandu-valley-nepal-implication-for-risk-assessment
#10
Ishwar Chandra Yadav, Ningombam Linthoingambi Devi, Jun Li, Gan Zhang, Adrian Covaci
Despite the fact that soil and sediments, which act as a sink or potential source of organic pollutants, have been polluted with organophosphate esters (OPEs) around the globe, extremely constrained data is accessible on environmental concentration and fate of OPEs in solid matrices in whole of the South Asia particularly if there should be an occurrence in Nepal. In this study, surface soil (N=19) and sediments samples (N=20) were analyzed for eight different OPE in Kathmandu Valley during October 2014. The concentration of ∑8OPE measured in sediments samples was 12 times higher than soil and ranged 983-7460ng/g dw (median 2210ng/g dw) and 65-27,500ng/g dw (186ng/g dw), respectively...
September 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28921396/determination-of-dominant-sources-of-nitrate-contamination-in-transboundary-russian-federation-ukraine-catchment-with-heterogeneous-land-use
#11
Y Vystavna, D Diadin, V Grynenko, V Yakovlev, Y Vergeles, F Huneau, P M Rossi, J Hejzlar, K Knöller
Nitrate contamination of surface water and shallow groundwater was studied in transboundary (Russia/Ukraine) catchment with heterogeneous land use. Dominant sources of nitrate contamination were determined by applying a dual δ (15)N-NO3 and δ (18)O-NO3 isotope approach, multivariate statistics, and land use analysis. Nitrate concentration was highly variable from 0.25 to 22 mg L(-1) in surface water and from 0.5 to 100 mg L(-1) in groundwater. The applied method indicated that sewage to surface water and sewage and manure to groundwater were dominant sources of nitrate contamination...
September 18, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28918337/ecotoxicological-and-microbiological-assessment-of-sewage-sludge-associated-with-sugarcane-bagasse
#12
Lais Roberta Deroldo Sommaggio, Dânia Elisa Christofoletti Mazzeo, Débora de Andrade E Silva Sant' Anna, Carlos Emílio Levy, Maria Aparecida Marin-Morales
Sewage sludge (SS) obtained after sewage treatment process may contain several toxic substances. Bioremediation can decrease the toxicity of the sludge, mainly when it is associated with stimulant agents, such as sugarcane bagasse (B). Samples of pure SS (SSP); SS+B; SS+Soil; and SS+B+Soil were bioremediated for 1, 3, and 6 months (T1, T2, and T3, respectively). After each period, the cytotoxic, genotoxic, and mutagenic potentials of the solid samples and their respective aqueous extracts (aqueous eluate and percolate water) were evaluated by the Allium cepa test...
September 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28915547/persistence-mobility-and-bioavailability-of-emerging-organic-contaminants-discharged-from-sewage-treatment-plants
#13
Kristin M Blum, Patrik L Andersson, Lutz Ahrens, Karin Wiberg, Peter Haglund
Little is known about the impact of emissions of micropollutants from small and large-scale sewage treatment plants (STPs) on drinking water source areas. We investigated a populated catchment that drains into Lake Mälaren, which is the drinking water source for around 2 million people including the inhabitants of Stockholm, Sweden. To assess the persistence, mobility, bioavailability and bioaccumulation of 32 structurally diverse emerging organic contaminants, sediment, integrated passive and grab water samples were collected along the catchment of the River Fyris, Sweden...
September 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28913681/calculation-of-intercepted-runoff-depth-based-on-stormwater-quality-and-environmental-capacity-of-receiving-waters-for-initial-stormwater-pollution-management
#14
Hai-Qin Peng, Yan Liu, Xue-Long Gao, Hong-Wu Wang, Yi Chen, Hui-Yi Cai
While point source pollutions have gradually been controlled in recent years, the non-point source pollution problem has become increasingly prominent. The receiving waters are frequently polluted by the initial stormwater from the separate stormwater system and the wastewater from sewage pipes through stormwater pipes. Consequently, calculating the intercepted runoff depth has become a problem that must be resolved immediately for initial stormwater pollution management. The accurate calculation of intercepted runoff depth provides a solid foundation for selecting the appropriate size of intercepting facilities in drainage and interception projects...
September 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28913581/investigation-on-the-anaerobic-co-digestion-of-food-waste-with-sewage-sludge
#15
Yubo Wang, Chunxiao Wang, Yulin Wang, Yu Xia, Guanghao Chen, Tong Zhang
In this laboratory-scale investigation on the applicability of the co-digestion of food waste with sewage sludge, evaluated were the effects of the single-stage versus two-stage operating modes at the hydraulic retention time (HRT) of 15 days, and the impact of HRTs: 15 days vs. 25 days, on the single-stage operation. An average volatile solid reduction (VSR) of 61% and methane yield of 314 ml/g-VS were achieved in the two-stage operation (HRT 15 days), while comparable VSR of 57% and the methane yield of 325 ml CH4/g-VS could only be detected at a longer HRT at 25 days in the single-stage operation...
September 14, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28912765/biology-and-genomics-of-an-historic-therapeutic-escherichia-coli-bacteriophage-collection
#16
Abiyad Baig, Joan Colom, Paul Barrow, Catherine Schouler, Arshnee Moodley, Rob Lavigne, Robert Atterbury
We have performed microbiological and genomic characterization of an historic collection of nine bacteriophages, specifically infecting a K1 E. coli O18:K1:H7 ColV(+) strain. These phages were isolated from sewage and tested for their efficacy in vivo for the treatment of systemic E. coli infection in a mouse infection model by Smith and Huggins (1982). The aim of the study was to identify common microbiological and genomic characteristics, which co-relate to the performance of these phages in in vivo study...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28912079/solid-anaerobic-digestion-state-of-art-scientific-and-technological-hurdles
#17
REVIEW
Laura André, André Pauss, Thierry Ribeiro
In this paper, a state-of-art about solid anaerobic digestion (AD), focused on recent progress and trends of research is proposed. Solid anaerobic digestion should be the most appropriate process for degradation of by-products with high total solid (TS) content, especially lignocellulosic materials like agricultural waste (straw, manure), household waste and food waste. Solid AD is already widely used in waste water treatment plant for treating plant for sewage sludge but could be more developed for lignocellulosic materials with high TS content...
September 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28912062/simulation-of-a-dynamical-ecotourism-system-with-low-carbon-activity-a-case-from-western-china
#18
Yuan He, Ping Huang, Hong Xu
Currently, sustainable tourism is becoming more and more important in developing ecological economies. To achieve low-carbon development, some industries, such as logistics and municipal solid waste, have already taken action, but tourism has not attached sufficient importance to this issue. This paper designs an ecotourism system including tourism, carbon waste (solid waste and sewage), and ecology (water supply and green areas) to simulate low-carbon ecotourism through a quantitative approach. This paper explores the tourism system as well as some interactive factors and studies their quantitative relationship based on historical data...
September 11, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28910723/sorption-desorption-equilibrium-and-diffusion-of-tetracycline-in-poultry-litter-and-municipal-biosolids-soil-amendments
#19
E D'Angelo
Tetracycline (TET) is commonly used to treat bacterial diseases in humans and chickens (Gallus gallus domesticus), is largely excreted, and is found at elevated concentrations in treated sewage sludge (biosolids) and poultry litter (excrement plus bedding materials). Routine application of these nutrient-and carbon-enriched materials to soils improves fertility and other characteristics, but the presence of antibiotics (and other pharmaceuticals) in amendments raises questions about potential adverse effects on biota and development of antibiotic resistance in the environment...
September 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28910645/performance-and-stability-of-sewage-sludge-digestion-under-co2-enrichment-a-pilot-study
#20
Luca Alibardi, Kevin Green, Lorenzo Favaro, Peter Vale, Ana Soares, Elise Cartmell, Yadira Bajón Fernández
Carbon dioxide (CO2) injection in anaerobic digestion has recently been proposed as an interesting possibility to boost methane (CH4) recovery from sludge and organic waste by converting a greenhouse gas into a renewable resource. This research assessed the effects of exogenous CO2 injection on performance and process stability of single-phase continuous anaerobic digesters. Two pilot scale reactors treating sewage sludge were operated for 130days. One reactor was periodically injected with CO2 while the other acted as control...
August 16, 2017: Bioresource Technology
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