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Author : Kurt Bernhard Haunschild
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (14 download)
Download or read book The Fate of Selected Toxics in the Activated Sludge Process written by Kurt Bernhard Haunschild and published by . This book was released on 1980 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kristopher Michael Lightsey
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (772 download)
Download or read book Assessing the Effects of Toxic Synthetic Organic Compounds on Activated Sludge Communities written by Kristopher Michael Lightsey and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent technological advances in environmental monitoring coupled with the increasingly stringent effluent requirements being placed on waste treatment systems makes it vital to have a more complete understanding of how specific compounds in waste streams can impact wastewater treatment processes. Since activated sludge processes are recognized as one of the most often applied technologies in wastewater treatment, this study assesses the impacts of select toxic synthetic organic compounds (SOCs) on the activated sludge communities in two types of wastewater treatment reactors: a completely-mixed activated sludge reactor (CMAS) and a sequencing batch reactor (SBR). Commonly applied activated sludge monitoring parameters, such as solids analysis and substrate removal, are collected and correlated to the results of microscopic image analysis (IA) and direct gradient gel electrophoresis (DGGE) to monitor the response of the activated sludge communities to variations in operational conditions, including the incorporation of SOCs in the influent feed and varying the solids retention time. The results of this research indicate that the response of the activated community is highly dependent on the reactor configuration. The CMAS settling performance was more strongly correlated to the shape parameters, and the SBR settling performance was more strongly correlated to the size parameters, which is qualitatively supported by particle settling theory when considering that SBR flocs were found to be larger than the CMAS flocs. The SBR began to exhibit larger floc sizes and had a higher sludge volume index with the incorporation of SOCs, while the CMAS flocs became more spherical after SOCs were incorporated and exhibited more discrete settling. The molecular analysis results revealed that the community structure within the activated sludge system was transient in response to environmental variations. Banding patterns indicated that samples were more similar to other samples taken from the same reactor under the same operational conditions. Thus, as operational conditions were varied, sample banding patterns would also change, indicating transitions in the genetic composition, and ultimately the dominant species present, in response to environmental changes.
Author : Mostafa F. Hashad
Publisher : Joint Transportation Research Program
ISBN 13 : 9781622601868
Total Pages : 42 pages
Book Rating : 4.6/5 (18 download)
Download or read book Study of Salt Wash Water Toxicity on Wastewater Treatment written by Mostafa F. Hashad and published by Joint Transportation Research Program. This book was released on 2006-08-15 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research effort focused on evaluating the toxicity of the saline waste water generated from washing of Indiana Department of Transportation (INDOT) deicing trucks and to study the feasibility of discharging it into wastewater treatment plants. Performance of activated sludge treating wastewater under varying levels of salt concentration was studied by measuring the Chemical Oxygen Demand (COD), activated sludge oxygen uptake rate (OUR) and Turbidity. Another component of the study was to examine the fate and chemistry of ferric ferro/ferri cyanide, an anti-caking complex that is added to deicing salt. Although, the complex form of cyanide is harmless, in the presence of sunlight it can dissociate to form free cyanide that is highly toxic. Deicing salts collected from INDOT’s West Lafayette and Lafayette Facilities were tested for total and amenable cyanide levels. Lafayette road salt had high levels of cyanide that could lead to violation of pretreatment standards on cyanide, if this salt wash water is discharged to wastewater treatment plant. Respirometry was used for the impact assessment of variable salt concentrations on the biological performance of a low strength activated sludge samples for a POTW using a static liquid – gas flow (GFS) respirometer with salt concentrations varying from 0 – 10% . Generally, positive effect in oxygen uptake rate (OUR) was noticed on low salt concentrations up to 2% and a sharp decrease thereafter. A salt concentration of 6% resulted in a 50% decrease in respiration rate of the tested activated sludge. Further studies should involve the effect of saline shock loads in the specific ammonia uptake rate (SAUR) and specific nitrate uptake rate (SNUR) in addition to the final effluent quality.
Author :
Publisher :
ISBN 13 :
Total Pages : 882 pages
Book Rating : 4.0/5 ( download)
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 620 pages
Book Rating : 4.3/5 (121 download)
Download or read book Remedial Action, Treatment, and Disposal of Hazardous Waste written by and published by . This book was released on 1990 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wesley Eckenfelder
Publisher : CRC Press
ISBN 13 : 9781566763028
Total Pages : 314 pages
Book Rating : 4.7/5 (63 download)
Download or read book Activated Sludge written by Wesley Eckenfelder and published by CRC Press. This book was released on 1998-03-11 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past, industrial wastewater treatment primarily focused on the removal of BOD and suspended solids. In recent years, however, the focus has changed to aquatic toxicity, priority pollutants, and volatile organics. This required changes in how we design and operate biological treatment plants. Many existing plants must be retrofitted. New approaches to meet new requirements are discussed in detail. The authors, with a combined experience of sixty years, have presented case studies for a wide variety of industrial wastewaters including pulp and paper, food processing, chemical and pharmaceuticals, and textile wastewaters. Data interpretation and process design are developed through the use of seventeen examples. Procedures for the laboratory and pilot plant generation of process design data are presented. Emphasis is placed on meeting the many new regulations governing industrial wastewater discharges.
Author : Wesley Eckenfelder
Publisher : CRC Press
ISBN 13 : 0203968565
Total Pages : 334 pages
Book Rating : 4.2/5 (39 download)
Download or read book Activated Sludge written by Wesley Eckenfelder and published by CRC Press. This book was released on 1998-08-04 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Process Theory Kinetics and Sludge Quality Control: Activated Sludge Process - Process Theory - Activated Sludge Separation Problems - References Activated Sludge Treatment of Municipal Wastewater U.S.A. Practice: General Approach - Clarifier Design - Aeration Tank (Reactor) Design - Appurtenance Design - Configurations - ReferencesEurope
Author : Maulin P Shah
Publisher : Elsevier
ISBN 13 : 0128216824
Total Pages : 622 pages
Book Rating : 4.1/5 (282 download)
Download or read book Removal of Toxic Pollutants through Microbiological and Tertiary Treatment written by Maulin P Shah and published by Elsevier. This book was released on 2020-08-20 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Removal of Toxic Pollutants through Microbiological and Tertiary Treatment: New Perspectives offers a current account of existing advanced oxidation strategies - including their limitations, challenges, and potential applications - in removing environmental pollutants through microbiological and tertiary treatment methods. The book introduces new trends and advances in environmental bioremediation technology, with thorough discussion of recent developments in the field. Updated information as well as future research directions in the field of bioremediation of industrial wastes is included. This book is an indispensable guide to students, researchers, scientists, and professionals working in fields such as microbiology, biotechnology, environmental sciences, eco-toxicology, and environmental remediation. The book also serves as a helpful guide for waste management professionals and those working on the biodegradation and bioremediation of industrial wastes and environmental pollutants for environmental sustainability. Introduces various treatment schemes, including microbiological and tertiary technologies for bioremediation of environmental pollutants and industrial wastes Includes pharmaceutical wastewater, oil refinery wastewater, distillery wastewater, tannery wastewater, textile wastewater, mine tailing wastes, plastic wastes, and more Describes the role of relatively new treatment technologies and their approaches in bioremediation, including molecular and protein engineering technologies, microbial enzymes, bio surfactants, plant-microbe interactions, and genetically engineered organisms Provides many advanced technologies in the field of bioremediation and phytoremediation, including electro-bioremediation technology, microbial fuel cell technology, nano-bioremediation technology, and phytotechnologies
Author : Nolan Arthur Randall
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (16 download)
Download or read book The Effects of Toxic Organics on Activated Sludge Performance written by Nolan Arthur Randall and published by . This book was released on 1983 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kyle Murray
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (935 download)
Download or read book Fate of Select Pharmaceutically Active Compounds in the Integrated Fixed Film Activated Sludge Process written by Kyle Murray and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Davis Ford
Publisher : CRC Press
ISBN 13 : 9781566766340
Total Pages : 376 pages
Book Rating : 4.7/5 (663 download)
Download or read book Toxicity Reduction written by Davis Ford and published by CRC Press. This book was released on 1998-05-18 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the reauthorization of the Clean Water Act in 1987, the U.S. EPA specifically addressed toxics management. In addition to the requirement to eliminate discharge of toxics, there can be a requirement to conduct a toxicity reduction evaluation (TRE). The scope of toxicity reduction varies from the very simple and inexpensive to the highly complex and costly. This book, volume three of the Water Quality Management Library, provides a complete overview of toxicity reduction evaluation. The book presents the testing and removal of toxicants, toxicity testing procedures, sampling techniques, baseline collection data, and source identification. Plus, the book presents toxicity reduction methodologies including unit processes necessary for organic toxicant control using biological and physical chemical methodologies as well as selected unit processes necessary for inorganic toxicant control.
Author : Robina Farooq
Publisher : BoD – Books on Demand
ISBN 13 : 953513129X
Total Pages : 280 pages
Book Rating : 4.5/5 (351 download)
Download or read book Physico-Chemical Wastewater Treatment and Resource Recovery written by Robina Farooq and published by BoD – Books on Demand. This book was released on 2017-05-03 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book on Physico-Chemical Treatment of Wastewater and Resource Recovery provides an efficient and low-cost solution for remediation of wastewater. This book focuses on physico-chemical treatment via advanced oxidation process, adsorption, its management and recovery of valuable chemicals. It discusses treatment and recovery process for the range of pollutants including BTX, PCB, PCDDs, proteins, phenols, antibiotics, complex organic compounds and metals. The occurrence of persistent pollutants poses deleterious effects on human and environmental health. Simple solutions for recovery of valuable chemicals and water during physico-chemical treatment of wastewater are discussed extensively. This book provides necessary knowledge and experimental studies on emerging physico-chemical processes for reducing water pollution and resource recovery.
Author :
Publisher :
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.F/5 ( download)
Download or read book Toxicity Reduction Evaluation Protocol for Municipal Wastewater Treatment Plants written by and published by . This book was released on 1989 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Henri Spanjers
Publisher : IWA Publishing
ISBN 13 : 1900222043
Total Pages : 202 pages
Book Rating : 4.9/5 (2 download)
Download or read book Respirometry in Control of the Activated Sludge Process written by Henri Spanjers and published by IWA Publishing. This book was released on 1998-01-01 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ebook only (available soon) The report describes the principles of measurement of respiration rate, the transformation of measurement data into other types of information, and the application of the obtained information in process control strategies. Some fundamental concepts on biological respiration and process control are provided to assist the reader with understanding the principles. A structured overview comprises some eighty control strategies in which respirometry plays a role. To enable the reader to consult the information sources, an extensive literature list of over 500 references in included and classified into six themes. Contents Fundamentals of Respiration Measuring Principles Measured and Deduced Variables Elementary Control Concepts Respirometry in Control of the Activated Sludge Process Summary and Perspectives. Scientific and Technical Report No.7 Also Available Respirometry in Control of the Activated Sludge Process: Benchmarking Control Strategies
Author :
Publisher :
ISBN 13 :
Total Pages : 732 pages
Book Rating : 4.3/5 (91 download)
Download or read book Inventory of Federal Energy-related Environment and Safety Research for ... written by and published by . This book was released on 1979 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 740 pages
Book Rating : 4.:/5 (319 download)
Download or read book Inventory of Federal Energy-related Environment and Safety Research for FY 1978: Project listings and indexes written by and published by . This book was released on 1979 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jia Guo
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (65 download)
Download or read book Biodegradation of Selected Organic Nitrogen Compounds in Activated Sludge Systems written by Jia Guo and published by . This book was released on 2010 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated sludge systems are commonly used to remove organic matter and nutrients from wastewater. They are also used to remove synthetic organic compounds from industrial activities. In this study, two identical activated sludge-based continuous stirred tank reactors (CSTRs) were employed to study the biodegradation of melamine and 4-nitrophenol and their impact on wastewater effluent water quality and microbial structure and functions. Two CSTRs at steady-state conditions were fed with two synthetic organic nitrogen compounds, melamine and p-nitrophenol (PNP) for 12 hours on day 136 and 150, respectively, of an extended test. Melamine, although toxic to human and animals, presented no detrimental effect on bioreactor performance and it appeared to act as an inert soluble substance in the activated sludge system. After the shock loading, melamine was quickly washed out of the continuous flow system. Batch degradation studies confirmed that the activated sludge from the CSTR was not capable of degrading melamine. The other chemical p-nitrophenol (PNP), however, showed significant toxicity towards the activated sludge, although subpeaks of possible PNP degradation metabolites were detected by high performance liquid chromatography indicating that the PNP could be partially degradable by the activated sludge. After 12-h shock loading of PNP, significant inhibition of nitrification and bacterial activity by PNP resulted in a prolonged period (> 22 days) of deterioration of effluent water quality. The results indicate that the fate and toxicity of synthetic organic nitrogen compounds can be quite different in activated sludge systems, although both melamine and PNP increased total nitrogen concentrations in wastewater effluent.
