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  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Environmental pollution. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (247 pages)
    Edition: 1st ed.
    ISBN: 9783319392592
    DDC: 333.910095
    Language: English
    Note: Intro -- Foreword -- Preface -- Contents -- About the Editors -- Part I: Wastewater Treatment and Monitoring: Physico-Chemical Treatment -- Chapter 1: RSM and ANN-GA Experimental Design Optimization for Electrocoagulation Removal of Chromium -- 1 Introduction -- 2 Materials and Methods -- 2.1 Experimental Setup and Procedure -- 2.2 Analytical Techniques -- 2.3 Electrocoagulation Process -- 2.4 Experimental Design -- 2.4.1 Response Surface Methodology -- 2.4.2 Artificial Neural Network-Genetic Algorithm -- 2.5 Path Analysis -- 3 Results and Discussion -- 3.1 RSM Modelling and Optimization -- 3.2 Centre Composite Design -- 3.3 ANN-GA Modelling and Optimization -- 3.4 Path Analysis -- 4 Conclusions -- References -- Chapter 2: Sunlight-Assisted Photo-Fenton Process for Removal of Insecticide from Agricultural Wastewater -- 1 Introduction -- 2 Materials and Methods -- 2.1 Chemicals Used -- 2.2 Experimental Procedure -- 2.3 Analytical Methods -- 3 Result and Discussions -- 3.1 Effect of pH -- 3.2 Effect of Hydrogen Peroxide Concentration -- 3.3 Effect of Ferrous Sulphate Dosing Concentration -- 3.4 Effect of Initial Concentration of Insecticide -- 3.5 Rate Equation and Kinetics -- 3.6 FTIR Spectra Analysis -- 4 Conclusion -- References -- Chapter 3: Catalytic Reduction of Water Contaminant `4-Nitrophenol´ over Manganese Oxide Supported Ni Nanoparticles -- 1 Introduction -- 2 Materials and Methods -- 2.1 Materials -- 2.2 Synthesis -- 2.3 Characterizations -- 2.4 Catalytic Reduction -- 2.5 Computational Methods -- 3 Results and Discussion -- 3.1 Computational Studies -- 4 Conclusions -- References -- Chapter 4: Simulation of Nitrate Removal in a Batch Flow Electrocoagulation-Flotation (ECF) Process by Response Surface Method... -- 1 Introduction -- 2 Materials and Methods -- 2.1 ECF Reactor -- 2.2 Experimental Procedure. , 2.3 Experimental Design and Data Analysis -- 3 Results and Discussion -- 3.1 Development of Regression Model Equation -- 4 Conclusions -- References -- Part II: Wastewater Treatment and Monitoring: Biological Treatment -- Chapter 5: Decolourization Studies of a Novel Textile Dye Degrading Bacterium -- 1 Introduction -- 2 Materials and Methods -- 2.1 Source of Sample -- 2.2 Isolation of Dye-Decolourizing Bacteria -- 2.3 Screening of Dye Decolourizing Bacteria and Decolourization Activity -- 2.4 Optimization of Different Parameters for Maximum Decolourization -- 2.5 Decolourization Analysis with Optimized Condition -- 2.6 Decolourization of Different Dyes -- 3 Results and Discussion -- 3.1 Isolation and Screening of Dye Decolourizing Bacteria -- 3.2 Dye Decolourization Activity -- 3.3 Optimization for Maximum Decolourization -- 3.4 Decolourization Activity with Different Dyes -- 4 Conclusions -- References -- Chapter 6: Preliminary Study of Rapid Enhanced Effective Micro-organisms (REEM) in Oil and Grease Trap from Canteen Wastewater -- 1 Introduction -- 2 Materials and Methods -- 2.1 Wastewater Characteristics -- 2.2 Characteristics of Rapid Effective Enhancements Micro-organisms (REEM) -- 2.3 Experimental Set-up -- 2.4 REEM Batch Experiments -- 3 Results and Discussion -- 3.1 Effects of REEM on Oil and Grease Removal -- 3.2 Effects of REEM on BOD Removal -- 3.3 Effect of REEM on SS Removal -- 3.4 Oil and Grease Removal in Batch Experiment -- 4 Conclusions -- 5 Recommendation -- References -- Chapter 7: Step-Feed Technology in SBR to Enhance the Treatment of Landfill Leachate -- 1 Introduction -- 2 Materials and Methods -- 2.1 Experimental Lab-Scale Reactor -- 2.2 Leachate Composition and Seed Sludge -- 2.3 Operating Strategy of Conventional SBR Cycle -- 2.4 Operating Strategy of Step-Feed SBR Cycle -- 2.5 Analytical Method -- 3 Results and Discussion. , 3.1 Overview of System Performance -- 3.2 Performance of Conventional SBR Cycle -- 3.3 Evaluation of Conventional SBR Cycle -- 3.4 Performance of Modified SBR Cycle (Step-Feed Process) -- 3.5 Evaluation of Modified SBR Cycle -- 4 Conclusions -- References -- Chapter 8: Response Surface Optimization of Phosphate Removal from Aqueous Solution Using a Natural Adsorbent -- 1 Introduction -- 2 Materials and Methods -- 2.1 Adsorbent -- 2.2 Adsorbate -- 2.3 Analytical Methods -- 2.4 Adsorption Experiments -- 2.5 RSM-Based Experimental Design, Modelling and Statistical Analysis -- 2.6 Equilibrium Kinetics and Isotherms Studies -- 3 Results and Discussion -- 3.1 Characterization of Adsorbent and Adsorption Process -- 3.2 RSM Model Fitting and ANOVA Analysis -- 3.3 Interaction of Variables and the Effect on Response -- 3.4 Process Optimization and Experimental Validation -- 3.5 Equilibrium Kinetics and Isotherms Studies -- 4 Conclusions -- References -- Chapter 9: Removal of Pharmaceuticals from Water Using Adsorption -- 1 Background -- 2 Adverse Effects of ECs -- 3 Treatment Technologies -- 4 Clay as Adsorbent -- 5 Experimental Studies on Organo Clay in Adsorbing Ciprofloxacin from Water -- 6 Conclusions -- References -- Part III: Hydrological and Quality Issues: Surface Water -- Chapter 10: Hydrological Regimes and Zooplankton Ecology at Tempe Floodplains, Indonesia: Preliminary Study Before the Operati... -- 1 Introduction -- 2 Materials and Methods -- 3 Results and Discussion -- 3.1 Environmental Variables -- 3.2 Zooplankton -- 4 Conclusions -- References -- Chapter 11: Organics and Heavy Metals Content in River Receiving the Effluent of Municipal Landfill Leachate Treatment -- 1 Introduction -- 2 Materials and Methods -- 3 Results and Discussion -- 4 Conclusions -- References -- Part IV: Hydrological and Quality Issues: Groundwater Contamination. , Chapter 12: Tracing the Significance of River for Arsenic Enrichment and Mobilization -- 1 Introduction -- 2 Materials and Methods -- 2.1 Study Area -- 2.2 Groundwater Sampling -- 3 Results and Discussion -- 4 Conclusions -- References -- Chapter 13: Evaluation of Groundwater Quality in 14 Districts in Sri Lanka: A Collaboration Research Between Sri Lanka and Jap... -- 1 Introduction -- 2 Materials and Methods -- 3 Results and Discussion -- 4 Conclusions -- References -- Chapter 14: Arsenic Contamination in Groundwater Affecting Holocene Aquifers of India: A Review -- 1 Introduction -- 2 Materials and Methods -- 3 Results and Discussion -- 3.1 Bengal Delta (West Bengal) -- 3.2 Middle Ganga Plain -- 3.3 Ghaghara Valley -- 3.4 Terai Plain of Nepal and West Bengal -- 3.5 Brahmaputra Valley -- 3.6 Barak Valley -- 3.7 Manipur Valley -- 4 Source and Release of Arsenic to Groundwater -- 5 Conclusions -- References -- Chapter 15: Water Quality Evaluation in a Rural Stretch of Tezpur, Assam (India) Using Water Quality Index and Correlation Mat... -- 1 Introduction -- 2 Material and Methods -- 2.1 Sampling Area -- 2.2 Sampling and Analysis -- 2.3 Ground Water Quality Index -- 2.4 Statistical Analysis -- 3 Results and Discussions -- 3.1 Water Quality Parameters -- 3.2 Ground Water Quality Index -- 3.3 Statistical Analysis -- 3.3.1 Basic Statistics -- 3.3.2 Correlation Coefficient -- 4 Conclusions -- References -- Part V: Hydrological and Quality Issues: Water Resource in Changing Paradigm -- Chapter 16: Meltwater Quality and Quantity Assessment in the Himalayan Glaciers -- 1 Introduction -- 2 Assessment of Meltwater Quality -- 2.1 Chemical Weathering and Hydrogeochemical Processes -- 2.2 Input from Atmospheric Precipitation and Anthropogenic Activities -- 3 Assessment of Meltwater Quantity -- 3.1 Meltwater Runoff -- 3.2 Suspended Sediment Transport. , 4 Conclusions -- References -- Chapter 17: Delineation of Point Sources of Recharge in Karst Settings -- 1 Introduction -- 2 Materials and Methods -- 3 Results and Discussion -- 3.1 Spring Hydrology -- 3.2 Hydrogeochemistry -- 3.3 Water Isotopes in Catchment Waters -- 3.4 Field Investigations -- 3.5 Tracer Test -- 4 Conclusions -- References -- Chapter 18: Identify the Major Reasons to Cause Vulnerability to Mekong Delta Under the Impacts of Drought and Climate Change -- 1 Mekong Delta -- 2 Assessment Method of Drought Impacts to Eco-social Sectors -- 3 Identification of Drought Impact Types and Causes -- 3.1 The Identification of Drought Impact Types to Each Sector in Mekong Delta -- 3.2 Major Drought Impacts to Each Sector in Mekong Delta -- 3.3 The Causes of Major Drought Impact Types -- 3.4 The Sectors Vulnerable Caused by Drought Impacts in Mekong Delta -- 3.5 Importance of Identification of Major Drought Impact Types and Vulnerable Sector -- 4 Conclusion -- References -- Chapter 19: Multi-pathway Risk Assessment of Trihalomethanes Exposure in Drinking Water Supplies -- 1 Introduction -- 2 Materials and Methods -- 2.1 Analysis of THMs -- 2.2 Cancer Risk Estimation -- 3 Results and Discussion -- 3.1 Concentration Range of THMs in Drinking Water Supplies -- 3.2 Risk Assessment -- 3.2.1 Cancer Risk Through Oral Ingestion -- 3.2.2 Cancer Risk from Dermal Absorption -- 3.2.3 Cancer Risk from Inhalation Route -- 3.2.4 Non-cancer Risk Assessment -- 4 Conclusions -- References -- Chapter 20: The Study of Water Losses Using Knowledge Based System Approach -- 1 Water-Issues and Objectives -- 1.1 The Study Area -- 1.2 Water Balance -- 2 Materials and Methods -- 2.1 Visual Basic Development -- 3 Results and Discussion -- 3.1 Knowledge Base -- 3.2 User Interface -- 3.3 Non-revenue Water Expert System (NRWES) -- 3.4 NRW Detections. , 3.5 Non-revenue Water Estimation.
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  • 2
    Online Resource
    Online Resource
    London :IWA Publishing,
    Keywords: Water -- Pollution -- Environmental aspects -- Southeast Asia -- Congresses. ; Biodiversity -- Southeast Asia -- Congresses. ; Ecology -- Southeast Asia -- Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (360 pages)
    Edition: 1st ed.
    ISBN: 9781780402291
    Series Statement: Southeast Asian Water Environment Series
    DDC: 363.73940959
    Language: English
    Note: Cover -- Copyright -- Contents -- Preface -- Section 1: Sustainable Water Environment and Aquatic Resource Management -- Least-cost policy options for nutrient pollution reduction in Taal Lake, Philippines -- Landfill development causes transition of flood prone area: a case study in Laguna Plain, Metro-Manila, the Philippines -- Assessment of environmental health risks during monsoon in Nepal -- Population's views on the water environment: the case of the Nam Pong watershed -- Importance of microhabitats for benthic faunal production in intertidal mangrove forests -- Water environmental conservation for improved livelihood in the Mekong Delta, Vietnam -- Strategies for sustainable management of fishery resources in the Pasak Jolasid Reservoir, Thailand -- Role and Impact of Small-scale Fishing in Cambodia -Household Survey in Kompong Thom Province- -- Analysis of reforestation as a watershed management policy for soil erosion control: a case study in the upstream Phong River, Thailand -- Participatory irrigation management practices in Vietnam: a pathway in progress towards effective and sustainable use of agricultural water -- Adaptation of rice farming to the changes in water regime due to dukes and sluice gates built against salinity intrusion in Mekong Delta -- Assessment of urban and industrial pollution on water quality: Kelani River Sri Lanka -- Pollution of some toxic metals in canal water leached out from acid sulphate soils in the Mekong Delta, Vietnam -- Water pollution in inner-city canals in Ho Chi Minh City, Vietnam -- Optical model for remote sensing in turbid waters based on the ship observations conducted in the upper Gulf of Thailand -- Macroinvertebrate pilot study for ecological health monitoring in the lower Mekong Basin. , Effect of heavy metals on oxygen utilization rate of nitrifying mixed culture and its application to the biosensing of toxicity -- Metallothionein, a biomarker for copper toxicity in mussel -- Relief of inhibitors for the PCR based Monitoring of occurrence and fate of Cryptosporidium in wastewater and surface water -- The application of fecal sterols and their ratios as fecal contamination indicators in water environment around Bangkok -- Section 2: Groundwater: Pollution and Management -- Groundwater protection zoning by groundwater vulnerability mapping in the lower central plain, Thailand -- Tracing nitrate transport in groundwater aquifers by isotope techniques -a case study in the Western Kofu Basin, Japan -- Groundwater arsenic pollution: impacts and sustainable solutions for Bangladesh -- Natural occurrence of arsenic in the organic-rich aquifer in Hanoi City: sources and mobilization processes -- Severity of arsenic concentration in soil and arsenic-rich sludge of Bangladesh and potential of their biological removal: a novel approach for tropical region -- Ground water shortage in aquifer of Dhaka City and land subsidence: a major concern in potable water supply in Dhaka Metropolis in 2030 -- Arsenic removal by iron coated sponge in drinking water treatment -- Section 3: Appropriate Technologies for Water Supply and Wastewater -- Spatial planning for surface water ported area: a case Study of the Pong River, Northeast Thailand -- Reactivity and sensitivity of DOM fractions to form THMs in raw water supply and in treated wastewater used for reclaimed water of the northern-region Industrial Estate, Thailand -- Decentralized wastewater treatment systems for small-scale communities -- Selection of appropriate decentralized sanitation alternatives in Vietnam -- Life cycle assessments of wastewater treatment systems in Bangkok City. , A survey of wastewater management in the concentrated latex industry in Southern Thailand -- Development of an Integrated decentralized sanitation system using aerobic membrane bioreacter -- Performance evaluation of free water surface constructed wetlands at high cadmium loading -- Constructed wetlands for reactive dye and nitrogen removal -- Microbial community structures of a constructed wetland: A biogeochemical approach based on the Fluorescence In Situ Hybridization technique -- Multiple evaluation of soil aquifer treatment for water reclamation using instrumental analysis and bioassay -- Water-soluble organic micro-pollutants in municipal wastewater and their removal during advanced treatment -- Minimization and stabilization of leachate through internal storage and re-circulation operation in tropical landfill -- Application of cleaner technology and photosynthetic wastewater treatment system in noodle processing factory -- Effect of water content and loading on the treatment of waste metal working fluids by thermophilic contact oxidization process -- Keyword index.
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  • 3
    Online Resource
    Online Resource
    London :IWA Publishing,
    Keywords: Ecology -- Southeast Asia -- Congresses. ; Biodiversity -- Southeast Asia -- Congresses. ; Water -- Pollution -- Environmental aspects -- Southeast Asia -- Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (238 pages)
    Edition: 1st ed.
    ISBN: 9781780401539
    Series Statement: Southeast Asian Water Environment Series
    DDC: 363.7394720959
    Language: English
    Note: Cover -- Copyright -- Contents -- Preface: History and future vision of the International Symposium on Southeast Asian Water Environment -- Introduction: Water environment in Southeast Asia: Where do we stand today? -- Chapter 1: Health -- Evaluation of detection methods targeting host-specific Bacteroides Spp. as a microbial source tracking marker -- Groundwater quality problems and issues in the dry-zone of Sri Lanka with special reference to fluoride contamination and Chronic Kidney Disease -- Investigation of nitrate concentration in tap water of Arak City, Iran -- Arsenic contamination in groundwater and Skin manifestations in three VDC of Kailali district in Terai, Nepal -- Comparison of tube-well and dug-well groundwater in the arsenic polluted areas in Cambodia -- Pathogenic pollution of surface water under dry and wet weather condition in Hanoi downtown -- DALYs lost due to diarrhoea: Household level drinking water treatment -- Chapter 2: Industrial Wastewater Treatment -- Enhanced anaerobic digestion of linoleic acid containing piggery wastewater -- Effect of process parameters on adsorptive and bio-removal of cyanide compounds from contaminated water -- Comparison of biohydrogen production process by extreme-thermophilic and mesophilic anaerobic bacteria -- Effect of salinity in nitrification and denitrification with high ammonia concentration -- Study on pre-treatment of dyeing wastewater by Wet Air Catalytic Oxidation and Fenton Oxidation -- Quantity and quality control to increase the efficiency of water utilization in the condom industry -- Decolourisation of secondary treated tannery effluent by adsorption using activated carbon derived from coconut shell -- Electricity generation from Tapioca wastewater using a Microbial Fuel Cell (MFC) -- Evaluation of isopropyl alcohol degrading bacteria isolated from a MBR sludge. , Performance evaluation of a pilot-scale Submerged Membrane Bioreactor (SMBR) for potential reuse of department store wastewater -- Chapter 3: Physical and Chemical Processes -- Production of natural coagulant from Moringa oleifera seed for drinking water treatment -- Arsenic removal from ground water by chemical oxidation and adsorption on in-situ formed ferrihydroxide -- Preparation and characterization of powdered activated carbon from empty fruit bunch -- Removal of microbes from highly turbid surface water in Southeast Asia using ceramic membrane filters -- Silica fouling of ultra-low-pressure reverse osmosis membrane in fluoride removal -- Chapter 4: Water Environmental Management -- Management of effluent from STR20 industry in Southern Thailand -- Components constituting Tropical Water Index: For assessment of water supply and the environment -- Engaging household sector for improved market-based incentive system in Laguna de Bay, Philippines -- Capacity development in Adaptive Water Management: Experiences and lessons learned at Farmers' Water School in Northern Philippines -- Chapter 5: Monitoring -- Modeling a peri-urban combined sewer system to assess drainage improvements: A case study of Rattanakosin Village, Thailand -- Heavy metal pollution and its long-term trends in Southeast Asian sediments -- Quality of water in Buriganga river and self-purification capacity from a point source -- Application of Yeast Estrogen Screen (YES) assay to monitor endocrine disruptors in surface water in Cantho City, Vietnam -- Storm and dry weather water quality characteristics in the Phnom Penh combined sewer system -- Index.
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  • 4
    Online Resource
    Online Resource
    London :IWA Publishing,
    Keywords: Water -- Pollution -- Environmental aspects -- Southeast Asia -- Congresses. ; Biodiversity -- Southeast Asia -- Congresses. ; Ecology -- Southeast Asia -- Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (242 pages)
    Edition: 1st ed.
    ISBN: 9781780401812
    Series Statement: Southeast Asian Water Environment Series
    DDC: 363.7394720959
    Language: English
    Note: Cover -- Copyright -- Contents -- Preface -- Chapter 1: Monitoring and Modeling of Water Environment -- Quantifying the impacts of water environment and conservation for sustainability in Northern Philippines -- Water quality assessment in the Saigon River by mathematical model -- Application study of Landsat images to support the water quality management on polluted reservoirs in Java Island -- Pollution of Cd, Fe and Ni in canal water in Acid Sulphate Soils as affected by soil acidification and available metal concentrations in soils -- Heavy metals level in Hyposarcus Pardalis as biomarker in upstream Citarum River, West Java, Indonesia -- Water quality biomonitoring using macroinvertebrates in Way Besai, Sumberjaya, West Lampung -- Analysis of urban water problems in Medan City, Indonesia -- Modeling Andaman Tsunami runup through Penang mangrove forest -- Chapter 2: Water Contaminants and Health Risks -- Critical review: Arsenic in water-soil-food chain in Bangladesh -- Health risks due to contamination of groundwater with heavy metals and pathogenic microorganisms at an arsenic-affected village in Cambodia -- Arsenic contamination in groundwater resources in Kathmandu Valley -- Assessment of fluoride intake, excretion, and health effects in Chiang Mai Basin, Thailand -- Chemical characteristics of groundwater of Kathmandu Valley, Nepal -- Noroviruses and Faecal Contamination in Saigon River and Urban Canals in Ho Chi Minh City, Vietnam -- Analysis of rainfall variation and waterborne risks in Nepal -- Chapter 3: Water Environmental Management -- SWOT analysis and decision-making flowsheet for the selection of appropriate sanitation alternatives in Haiphong City, Vietnam -- Role and prospects of fish traders in Cambodian small-scale fishing: The case of Chhnok Tru village, Kampong Chhnang province. , Capacity Building, Institutional Role and Community Participation in Water conservation for enhancing the crop productivity in South India -- Households' willingness to Pay for improved Watershed Management: Evidence from the Philippines -- Kanchan™ Arsenic Filter (KAF): a technology for drinking water quality improvement at household and its promotion in Terai, Nepal -- Performance evaluation of septic tanks as onsite sanitation system -- An assessment of community wastewater management performance -- Contribution to environmental burdens from sanitation systems in abatement of health impacts - case study in low-income community of Dhaka, Bangladesh -- Chapter 4: Water and Wastewater Treatment by Biological Methods -- In situ phylogenetic diversity study of estrone degrading microbial community in activated sludge using microautoradiography-fluorescent in situ hybridization -- Chemical classes and prominent pyrolysis fragments of dissolved organic matter in wastewater treated by stabilization ponds -- Performance of a recirculating tank-based system utilizing floating and submerged filters with a denitrification column for the culture of barramundi (Lates calcarifer) -- Sequential microaerophilic-aerobic treatment of textile wastewater -- Effect of alkalinity on performance of simulated bioreactor of fruit and vegetable wastes -- Chapter 5: Water and Wastewater Treatment by Physico-chemical Methods -- Primary treatment by air flotation in rubber trap of concentrated latex industry -- Preparation parameters affecting natural organic matter adsorption by iron oxide-coated sands -- Treatment of cyanide bearing aqueous solutions by plain and biologically activated carbon -- Fluorescent excitation-emission matrix peak intensity applied for evaluating DOC and THMFP reductions of reservoir waters by alum coagulation. , Simultaneous oxidation and removal of arsenite (III) from drinking water using manganese oxide coated alumina -- Keyword index.
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  • 5
    Keywords: Water quality ; Water pollution ; Planetology ; Environmental monitoring ; Environmental engineering ; Biotechnology ; Environment ; Environment ; Water quality ; Water pollution ; Planetology ; Environmental monitoring ; Environmental engineering ; Biotechnology
    Description / Table of Contents: This book brings together and integrates contributions on water quality modeling, monitoring and assessment techniques; wastewater treatment technologies; and sociological approaches in a single text. Divided into twenty chapters, it offers a comprehensive reference for students, professionals and researchers working on various aspects of water environment technology. The papers published in this book - selected from those presented at the 1st International Forum on Asian Water Environment Technology, held in 2013 in New Delhi, India - highlight the water environmental problems in Asia and respective countermeasures. This book addresses water quality requirements, emphasizing the factors that affect the water environment. Treated wastewater as a new source of water is also examined, introducing readers to important aspects of water reuse. Selecting the most effective and proper wastewater treatment approach is actually the most essential part of generating a new water resource, as well as protecting the receiving water environments. Thus, the fundamental principles of wastewater treatment and monitoring are a major focus in this book, which is intended to help readers effectively address various water environmental problems in Asian countries
    Type of Medium: Online Resource
    Pages: Online-Ressource (XIV, 250 p. 85 illus., 31 illus. in color, online resource)
    ISBN: 9783319392592
    Series Statement: SpringerLink
    Language: English
    Note: Description based upon print version of record
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 54 (2005), S. 0 
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: We investigated ammonia-oxidizing bacteria in activated sludge collected from 12 sewage treatment systems, whose ammonia removal and treatment processes differed, during three different seasons. We used real-time PCR quantification to reveal total bacterial numbers and total ammonia oxidizer numbers, and used specific PCR followed by denaturing gel gradient electrophoresis, cloning, and sequencing of 16S rRNA genes to analyze ammonia-oxidizing bacterial communities. Total bacterial numbers and total ammonia oxidizer numbers were in the range of 1.6 × 1012–2.4 × 1013 and 1.0 × 109–9.2 × 1010 cells l−1, respectively. Seasonal variation was observed in the total ammonia oxidizer numbers, but not in the ammonia-oxidizing bacterial communities. Members of the Nitrosomonas oligotropha cluster were found in all samples, and most sequences within this cluster grouped within two of the four sequence types identified. Members of the clusters of Nitrosomonas europaea–Nitrosococcus mobilis, Nitrosomonas cryotolerans, and unknown Nitrosomonas, occurred solely in one anaerobic/anoxic/aerobic (A2O) system. Members of the Nitrosomonas communis cluster occurred almost exclusively in association with A2O and anaerobic/aerobic systems. Solid residence time mainly influenced the total numbers of ammonia-oxidizing bacteria, whereas dissolved oxygen concentration primarily affected the ammonia-oxidizing activity per ammonia oxidizer cell.
    Type of Medium: Electronic Resource
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