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 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 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 Abstracts of Theses written by University of Missouri at Rolla and published by . This book was released on 1971 with total page 172 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 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 Design Manual written by and published by . This book was released on 1987 with total page 132 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 The Microbiology of Anaerobic Digesters written by Michael H. Gerardi and published by John Wiley & Sons. This book was released on 2003-09-19 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anaerobic digestion is a biochemical degradation process that converts complex organic material, such as animal manure, into methane and other byproducts. Part of the author's Wastewater Microbiology series, Microbiology of Anareboic Digesters eschews technical jargon to deliver a practical, how-to guide for wastewater plant operators.
Download or read book Municipal Water Pollution Control Abstracts for 1974 written by Joanne S. Murphy and published by . This book was released on 1975 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Anaerobic Digestion written by Gavin Collins and published by Frontiers Media SA. This book was released on 2018-11-27 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anaerobic digestion (AD) is a naturally-occurring biological process in soils, sediments, ruminants, and several other anoxic environments, that cycles carbon and other nutrients, and converts organic matter into a methane-rich gas. As a biotechnology, AD is now well-established for the treatment of the organic fraction of various waste materials, including wastewaters, but is also increasingly applied for an expanding range of organic feedstocks suitable for biological conversion to biogas. AD applications are classified in various ways, including on the basis of bioreactor design; and operating parameters, such as retention time, temperature, pH, total solids (TS) and volatile solids (VS) contents, and biodegradability of substrates. AD is an attractive bioenergy and waste / wastewater treatment technology. The advantages of AD for waste treatment include: production of a useable fuel (biogas/methane); possibility of high organic loading; reduced carbon footprint; and suitability for integration into a wide variety of process configurations and scales. Specifically, two important, and developing, applications exemplify the potential of AD technologies: (1) the integration of AD as the basis of the core technologies underpinning municipal wastewater, and sewage, treatment, to displace less sustainable, and more energy-intensive, aerobic biological treatment systems in urban water infrastructures; and (2) technical innovations for higher-rate conversions of high-solids wastestreams, and feedstocks, for the production of energy carriers (i.e. methane-biogas, but possibly also biohydrogen) and other industrially-relevant intermediates, such as organic acids. Internationally, the research effort to maximize AD biogas yield has increased ten-fold over the past decade. Depending on the feedstocks, bioreactor design and process parameters, fundamental and applied knowledge are still required to improve conversion rates and biogas yields. This Research Topic cover aspects related to AD processes, such as the effect of feedstock composition, as well as the effect of feedstock pre-treatment, bioreactor design and operating modes, on process efficiency; microbial community dynamics and systems biology; influence of macro- and micro-nutrient concentrations and availability; process control; upgrading and calibration of anaerobic digestion models (e.g. ADM1) considering the biochemical routes as well as the hydrodynamics in such ecosystems; and novel approaches to process monitoring, such as the development, and application, of novel, and rapid diagnostic assays, including those based on molecular microbiology. Detailed full-scale application studies were also particularly welcomed.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 1424 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 Biological Wastewater Treatment written by Mogens Henze and published by IWA Publishing (International Water Assoc). This book was released on 1881 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: For information on the online course in Biological Wastewater Treatment from UNESCO-IHE, visit: http://www.iwapublishing.co.uk/books/biological-wastewater-treatment-online-course-principles-modeling-and-design Over the past twenty years, the knowledge and understanding of wastewater treatment have advanced extensively and moved away from empirically-based approaches to a first principles approach embracing chemistry, microbiology, physical and bioprocess engineering, and mathematics. Many of these advances have matured to the degree that they have been codified into mathematical models for simulation with computers. For a new generation of young scientists and engineers entering the wastewater treatment profession, the quantity, complexity and diversity of these new developments can be overwhelming, particularly in developing countries where access is not readily available to advanced level tertiary education courses in wastewater treatment. Biological Wastewater Treatment addresses this deficiency. It assembles and integrates the postgraduate course material of a dozen or so professors from research groups around the world that have made significant contributions to the advances in wastewater treatment. The book forms part of an internet-based curriculum in biological wastewater treatment which also includes: Summarized lecture handouts of the topics covered in book Filmed lectures by the author professors Tutorial exercises for students self-learning Upon completion of this curriculum the modern approach of modelling and simulation to wastewater treatment plant design and operation, be it activated sludge, biological nitrogen and phosphorus removal, secondary settling tanks or biofilm systems, can be embraced with deeper insight, advanced knowledge and greater confidence.
Download or read book Trace Elements in Anaerobic Biotechnologies written by Fernando G. Fermoso and published by IWA Publishing. This book was released on 2019-07-15 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of trace elements to promote biogas production features prominently on the agenda for many biogas-producing companies. However, the application of the technique is often characterized by trial-and-error methodology due to the ambiguous and scarce basic knowledge on the impact of trace elements in anaerobic biotechnologies under different process conditions. This book describes and defines the broad landscape in the research area of trace elements in anaerobic biotechnologies, from the level of advanced chemistry and single microbial cells, through to engineering and bioreactor technology and to the fate of trace elements in the environment. The book results from the EU COST Action on ‘The ecological roles of trace metals in anaerobic biotechnologies’. Trace elements in anaerobic biotechnologies is a critical, exceptionally complex and technical challenge. The challenging chemistry underpinning the availability of trace elements for biological uptake is very poorly understood, despite the importance of trace elements for successful anaerobic operations across the bioeconomy. This book discusses and places a common understanding of this challenge, with a strong focus on technological tools and solutions. The group of contributors brings together chemists with engineers, biologists, environmental scientists and mathematical modellers, as well as industry representatives, to show an up-to-date vision of the fate of trace elements on anaerobic biotechnologies.
