Download or read book Phosphorus Precipitation in Anaerobic Digestion Process written by Nuria Martí Ortega and published by Universal-Publishers. This book was released on 2006-06-27 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anaerobic digestion is the most widely process used for the stabilisation of wastewater treatment sludge. Organic matter is transformed into CH4 and CO2 by the action of different bacteria groups. The main advantages are the reduction of the volume of waste sludge and the production of methane gas that can be utilized as energy supply for the process. During anaerobic digestion of activated sludge from enhanced biological phosphorus removal process (EBPR-process), most of the phosphorus eliminated during the water treatment, as well as that from cellular lysis, is released. So that, phosphorus concentration in the digester increases and precipitation problems can occur. In this work, anaerobic digestion process of waste activated sludge and primary pre-fermented sludge was studied in a pilot plant. Furthermore, phosphorus balance was performed in order to quantify phosphorus precipitation in the digester. Separate and mixed thickening of sludges was carried out with the aim of study its influence in the process. NOTE: This thesis is in Spanish.
Download or read book Fate and Effects of Chemically precipitated Phosphorus in Anaerobic Digestion written by Douglas Wayne Max and published by . This book was released on 1970 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study was conducted to determine the fate of chemically-precipitated phosphorus during the overall wastewater treatment process under actual field conditions. Specific objectives were: to evaluate the removal of phosphorus with alum and sodium aluminate in a pilot plant activated sludge system, to determine the fate of the precipitated phosphorus incorporated into the microbial floc when placed in an anaerobic environment, and to observe the effect of aluminum on the digestion process. Five 38-gpd continuous-flow activated sludge pilot plant units were operated at the Rolla Love Creek trickling filter plant and were fed with settled domestic sewage. The sludge from the pilot plants, mixed with an appropriate quantity of primary sludge from the plant, was used to maintain five 3-1 anaerobic digesters. The parameters employed during the aerobic studies were influent and effluent phosphorus and aluminum, total and volatile suspended solids, and chemical oxygen demand; and those used in the anaerobic studies were phosphorus and aluminum in the feed sludge, the supernatant and the digester sludge, volatile acids, and gas production. The addition of alum and sodium aluminate to the activated sludge aeration chamber effectively removed phosphorus from domestic wastewater without adversely affecting the efficiency of the process. The precipitated phosphorus was concentrated in the digester sludge and was not released to the supernatant during anaerobic digestion, and the high concentration of the aluminum ion in the digester sludge produced no detrimental effects. The chemical precipitation of phosphorus in the activated sludge aeration chamber and anaerobic digestion of the sludge produced were found to be a feasible and effective method of eliminating at least part of the phosphorus input to lakes and streams, and could be incorporated into existing or future treatment plants with little capital expense"--Abstract, leaf ii.
Download or read book Process Design Manual for Phosphorus Removal written by Black & Veatch and published by . This book was released on 1971 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Phosphate Removal from Wastewaters written by R. Ramadori and published by Pergamon. This book was released on 1987 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soluble Phosphorus Removal in the Activated Sludge Process written by Soap and Detergent Association and published by . This book was released on 1972 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phosphorus Polluter and Resource of the Future written by Christian Schaum and published by IWA Publishing. This book was released on 2018-03-15 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive book provides an up-to-date and international approach that addresses the Motivations, Technologies and Assessment of the Elimination and Recovery of Phosphorus from Wastewater. This book is part of the Integrated Environmental Technology Series.
Download or read book Kinetics of the Release and Precipitation of Phosphorus in Anaerobic Digesters Sequencing Biological Phosphorus Removal Systems written by Dipankar Sen and published by . This book was released on 1986 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Phosphate Removal from Wastewaters written by R. Ramadori and published by Elsevier. This book was released on 2017-01-31 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological Phosphate Removal from Wastewaters contains the proceedings of an International Association on Water Pollution Research and Control Specialized Conference held in Rome, Italy on September 28-30, 1987. Contributors review advances that have been made in the removal of biological phosphates from wastewaters, both at the fundamental scientific level and in the practical application of the process. Topics range from the fundamental microbiology and biochemistry of the enhanced biological removal of phosphate to the practical full-scale plant experiences with phosphorus removal and sludge handling from such processes. This text is comprised of 43 chapters; the first of which describes the utilization of polyphosphate as an energy reserve in Acinetobacter sp. and activated sludge. Attention then turns to metabolic control in polyphosphate-accumulating bacteria and its role in enhancing biological phosphate removal. The biochemistry and energetics of biological phosphorus removal are also considered. The next section is devoted to process modeling and includes chapters that explore the kinetics of biological excess phosphorus removal; factors affecting anaerobic stabilization during biological phosphorus removal; and the behavior of magnesium in biological phosphate removal. In the next section, bench/pilot-scale studies are presented; one of which investigated the reduction of returned phosphorus from a sludge treatment process. The book concludes with a discussion on phosphate removal mechanisms and pilot- and full-scale experiences. This book will be of interest to students, practitioners, and policymakers in water pollution control.
Download or read book Phosphorus and Nitrogen Removal from Municipal Wastewater written by Richard I. Sedlak and published by CRC Press. This book was released on 1991-10-07 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This valuable new book offers practical guidance regarding the design and operation of systems for reducing effluent nitrogen and phosphorus. The principles of nitrogen and phosphorus removal are discussed, including sources of nitrogen and phosphorus in wastewater, removal options, nitrogen and phosphorus transformations in treatment, process selection, and treatment. The book also covers the design and operation of nitrogen and phosphorus removal systems, including system options, system design, facility design, facility costs, and operation. Practical case studies are provided as examples of successful system implementations that may be able to help you decide what will work best in your plant.
Download or read book Investigation of Magnesium Ammonium Phosphate Precipitate in an Anaerobic Digester System written by Terrence John McManus and published by . This book was released on 1974 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phosphorus and Nitrogen Removal from Municipal Wastewater written by RichardI. Sedlak and published by Routledge. This book was released on 2018-04-27 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This valuable new book offers practical guidance regarding the design and operation of systems for reducing effluent nitrogen and phosphorus. The principles of nitrogen and phosphorus removal are discussed, including sources of nitrogen and phosphorus in wastewater, removal options, nitrogen and phosphorus transformations in treatment, process selection, and treatment. The book also covers the design and operation of nitrogen and phosphorus removal systems, including system options, system design, facility design, facility costs, and operation. Practical case studies are provided as examples of successful system implementations that may be able to help you decide what will work best in your plant.
Download or read book Effects of Phosphorus Removal Chemicals Upon Anaerobic Sludge Digestion microform written by Warren B. (Warren Bert) Kindzierski and published by National Library of Canada. This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alum and ferric chloride are commonly employed to aid phosphorus removal in wastewater treatment. Previous studies have indicated the use of these chemical coagulants produce sludges that adversely affect anaerobic digestion. The objective of this research was to assess the magnitude of effects chemical coagulants have upon anaerobic digestion by monitoring methane production and measuring concentrations of aluminum or iron present during batch digestion of chemically precipitated sludge. Alum addition to wastewater produced sludge that demonstrated reduced methane production when batch digested anaerobically. The magnitude of the adverse effects on methane production increased with increasing aluminum concentrations up to 144 mg/L. The type or nature of chemical floe that forms during the actual coagulation process may play an important role in influencing the magnitude of the adverse effects during digestion. The nature of the chemical effect appeared to limit the extent or degree to which the anaerobic microorganisms were able to metabolize the organic wastes and appeared to occur with the non-methanogenic species. Ferric chloride addition to wastewater produced sludge that, when batch digested anaerobically, demonstrated reduced methane production, however the magnitude of the adverse effects did not increase with increasing iron concentrations up to 770 mg/L. The nature of the chemical effect appeared to occur with the non-methanogenic species.
Download or read book Anaerobic Digestion Processes written by Nigel Horan and published by Springer. This book was released on 2018-04-18 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents new application processes in the context of anaerobic digestion (AD), such as phosphorus recovery, microbial fuel cells (MFCs), and seaweed digestion. In addition, it introduces a new technique for the modeling and optimization of AD processes. Chapters 1 and 2 review AD as a technique for converting a range of organic wastes into biogas, while Chapter 3 discusses the recovery of phosphorus from anaerobically digested liquor. Chapters 4 and 5 focus on new techniques for modeling and optimizing AD. Chapters 6 and 7 then describe the state of the art in AD effluent treatment. The book’s final three chapters focus on more recent developments, including microbial fuel cells (MFCs) (Chapter 8), seaweed production (Chapter 9), and enzyme technologies (Chapter 10).
Download or read book Influence of Phosphorus Precipitation on Wastewater Treatment Processes written by Jan Derco and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus stimulates aquatic plant growth and contributes to eutrophication process in rivers, lakes and the ocean. A large part of phosphorus is discharged into the receiving waters by wastewater. One of the solutions of this problem is represented by chemical precipitation. Simultaneous precipitation of phosphorus from wastewater with metal salts is commonly applied. Metal salts are dosed directly into aeration tank, and produced precipitates are wasted as a part of the secondary sludge. Thus, not only aerobic and anoxic processes of wastewater treatment plant are carried out in the presence of precipitant metals and precipitates but also the precipitates are, in many cases, accumulated in anaerobic sludge digesters. Operational research of phosphorus precipitation in lab-scale encompasses the impact of Fe2+, Fe3+ and Al3+ salts on biological nitrification and denitrification processes, sedimentation and thickening characteristics of sludge as well as anaerobic sludge stabilisation processes. The measurements of specific oxygen uptake rate, nitrification and denitrification tests and monitoring of effluent values of quality standards were applied to evaluate the processes performance. Other objective of our research is to contribute to methodology for examination of thickening and dewatering characteristics of sludge with tested precipitation agents. Mathematically processed experimental results are used to compare sedimentation, precipitation and dewatering characteristics of activated sludge cultivated in the presence of selected precipitation agents. Better description of the experimental results was obtained with three parameters model of particles mass flow density curve. Comparison of minimum sedimentation tank size necessary for gravitational separation of individual sludge was used to examine sedimentation characteristics of activated sludge. Thickening characteristics of sludge were evaluated based upon thickening area needed to maintain the required sludge concentration in activated sludge model, which corresponds to maximum surface load in undissolved substances. Chemical precipitation of phosphorus produces metal precipitates. These are transported with the waste sludge to the digestion tanks. Impact of the precipitates on the anaerobic sludge stabilisation process as well as on the sludge water quality was tested in the work. The main aim of the research and proposed chapter submission is a pursuit of decision making regarding selection of type of precipitating agent and strategy of chemical phosphorus precipitation.
Download or read book Phosphorus Removal written by and published by . This book was released on 1973 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phosphorus Removal written by Water Resources Scientific Information Center and published by . This book was released on 1973 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: 490 references and abstracts from Selected water resources abstracts through Feb. 15, 1973 (v. 6, no. 4). Each entry consists of title, author, source, descriptors, identifiers, abstract, and accession number. Keyword index.
Download or read book Phosphorus Solubility During Anaerobic Digestion of Sludge Produced by Primary Phosphorus Removal with Iron Chlorides written by M. E. Jack and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
