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Author : Joseph Edgar Little
Publisher :
ISBN 13 :
Total Pages : 41 pages
Book Rating : 4.:/5 (224 download)
Download or read book Removal of Phosphorous from a Sewage Lagoon by Harvesting Algae written by Joseph Edgar Little and published by . This book was released on 1969 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. John Cullinane
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.3/5 (121 download)
Download or read book Algae and Phosphorus Removal from Sewage Lagoon Effluents by in Situ Chemical Addition written by M. John Cullinane and published by . This book was released on 1982 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study is to develop methods for rapidly and economically increasing the capacity of complete retention and/or intermittently discharging wastewater stabilization lagoons located at Corps of Engineers recreational sites through in situ application of chemical coagulating agents. Alum was chosen as the coagulant in this study because it is relatively inexpensive and readily available. Application and mixing techniques were optimized using a 14-ft boat and small outboard motor. Analyses were performed to determine treatment efficiencies for biochemical oxygen demand (BOD5), chemical oxygen demand (COD), suspended solids, total phosphates and orthophosphates. Algae enumerations were also performed. The study took place over an entire year with three coagulant applications performed to study the long-term effects of in situ alum addition. In situ alum addition consistently produced effluents with phosphate concentrations below 1.0 mg/alum. Removal rates for BOD and COD were approximately 80 percent with suspended solids being removed at rates as high as 95 percent. Algae removal rates were as high as 95 percent. No adverse effects were seen in either lagoon performance or in spraying the effluents on vegetation as a result of alum addition. Sludge accumulations of 0.1 to 0.2 in. per chemical application were measured. Repeated applications of alum did not result in significant increases in the sludge thickness, and no long-term adverse effect on lagoon performance is expected.
Author :
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.3/5 ( download)
Download or read book Phosphorus Removal written by and published by . This book was released on 1973 with total page 284 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.
Author : Water Resources Scientific Information Center
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.3/5 (91 download)
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 284 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.
Author : Erick William Griffiths
Publisher :
ISBN 13 :
Total Pages : 71 pages
Book Rating : 4.:/5 (642 download)
Download or read book Removal and Utilization of Wastewater Nutrients for Algae Biomass and Biofuels written by Erick William Griffiths and published by . This book was released on 2010 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Logan City Environmental Department operates a facility that consists of 460 acres of fairly shallow lagoons (~ 5'deep) for biological wastewater treatment that meets targets for primary and secondary treatments (solids, biological oxygen demand (BOD), and pathogen removal). Significant natural algal growth occurs in these lagoons, which improves BOD removal through oxygenation and also facilitates N removal through volatilization as ammonia under high pH conditions created by algal growth. Phosphorus, however, is non-volatile and stays in the water and likely cycles in and out of algal cells as they grow and die in the lagoons. In the near future, the regulatory limits on phosphorus released from the Logan wastewater treatment facility are likely to become significantly lower to counter potential downstream eutrophication. One way to potentially lower phosphorus levels in the wastewater effluent is through management of algal growth in the lagoons. As mentioned above, algae growth naturally occurs in the treatment lagoons and if the algal biomass is harvested when growth yields are highest, the phosphorus contained in the cells could be removed to obtain phosphorus-free water. The algal biomass could then be used for production of biofuels. This research focuses on laboratory and pilot assessments to show the ability of algae indigenous to the Logan lagoons to uptake phosphorus and produce biomass that can be used for biofuel production.
Author : Jan Scherfig
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.3/5 (91 download)
Download or read book Effect of Phosphorus Removal Processes on Algal Growth written by Jan Scherfig and published by . This book was released on 1973 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John H. Neil
Publisher : Minister of Supply and Services
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (2 download)
Download or read book The Harvest of Biological Production as a Means of Improving Effluents from Sewage Lagoons written by John H. Neil and published by Minister of Supply and Services. This book was released on 1976 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 732 pages
Book Rating : 4.E/5 ( download)
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1986 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 766 pages
Book Rating : 4.3/5 (91 download)
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:
Author : Water Resources Scientific Information Center
Publisher :
ISBN 13 :
Total Pages : 616 pages
Book Rating : 4.3/5 (91 download)
Download or read book Algae Abstracts: To 1969 written by Water Resources Scientific Information Center and published by . This book was released on 1973 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jing Shi
Publisher : Cuvillier Verlag
ISBN 13 : 373693579X
Total Pages : 174 pages
Book Rating : 4.7/5 (369 download)
Download or read book Removal of Nitrogen and Phosphorus from Municipal Wastewater using Microalgae immobilized on Twin-Layer System written by Jing Shi and published by Cuvillier Verlag. This book was released on 2010-12-09 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excessive nitrogen and phosphorus loading from municipal wastewater treatment plants is an ongoing threat to water quality, which leads to more stringent environmental regulations in different countries. Microalgal mediated twin-layer system offers an interesting alternative for nitrogen and phosphorus removal since it provides a treatment to remove both nutrients efficiently coupled with the production of potentially valuable biomass. In the twin-layer system, microalgae are immobilized by self-adhesion on a wet, microporous, ultrathin substrate (the substrate layer). Subtending the substrate layer, a second layer, consisting of a macroporous fibrous material (the source layer), provides the growth medium. Twin-layer effectively separate microalgae from the bulk of their growth medium, yet allow diffusion of nutrients. Nylon filter cloth and glass grid reinforced lamina were selected as the suitable substrate and source layer for twin-layer system, respectively. Immobilized green algae Scenedesmus rubescens and Chlamydomonas terricola showed highest biomass productivities among 23 algae supplied by synthetic secondary wastewater and were recommended for wastewater treatment in general. Removal of nitrogen and phosphorus from the real municipal wastewater by S. rubescens was investigated. During 54 days, S. rubescens grew well (1.05 g dry weight m-2 day-1), remained immobilized and removed phosphorus, nitrate and ammonium efficiently from four types of wastewater within short retention time (1-2 days), e.g. the residual phosphate-P was
Author : Caldwell Connell Engineers
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.3/5 (121 download)
Download or read book Algae Harvesting from Sewage written by Caldwell Connell Engineers and published by . This book was released on 1976 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Juliet Neroli Mulvihill
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.3/5 ( download)
Download or read book Biological Removal of Nitrogen and Phosphorus from Sewage Effluents written by Juliet Neroli Mulvihill and published by . This book was released on 1976 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrew R. Elder
Publisher :
ISBN 13 :
Total Pages : 161 pages
Book Rating : 4.:/5 (88 download)
Download or read book Optimization of Dissolved Air Flotation for Algal Harvesting at the Logan, Utah Wastewater Treatment Plant written by Andrew R. Elder and published by . This book was released on 2011 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research evaluated dissolved air flotation (DAF) as a separation method for algae and phosphorus from municipal wastewater at the City of Logan, Utah Wastewater Reclamation Facility. DAF uses the supersaturation of air to raise suspended algae and other particles to the surface, where they can be easily removed. DAF, in conjunction with chemical coagulants and flocculants, can approach 95% algae and phosphorus removal. The algae removed using the DAF process will be used in the production of biofuels and bioplastics. A pilot DAF unit was used to determine the optimum alum dose for total phosphorus (TP) and algae removal. In addition, a bench-scale jar test unit was used to study the effects of various alum and polymer doses on removal efficiencies at different times of the day. An optimal alum dose was found to be 30 mg/L based on results from both the pilot and bench-scale units. No advantage to adding polymer was found. Algae removal efficiencies on the pilot DAF ranged from 68-70%, and the effluent algae concentration was reduced to 10 mg/L. Approximately 65% of the total phosphorus was removed, from 1.1 to 0.4 mg/L, which is low enough to meet regulations anticipated to be promulgated by the state of Utah. Using the assumption that the molar weight of algae is 3,550 g/mole, the molar ratio of Al/TSS was found to be 30.1 and the molar ratio of Al/TP was found to be 7.5. Extracellular polymeric substances (EPS) excreted by algal cells act as a natural flocculant and may allow for chemical usage to be minimized. Autoflocculation and bioflocculation, natural processes caused by EPS production and an increased pH level, were not observed to be a significant factor. The chemical dosing rates provide the City of Logan with basic operational parameters for a full-scale (15 million gallons per day) DAF plant, providing an effluent phosphorus level below 0.5 mg/L. The alum will cost $1,118 per day, with a daily electrical cost of approximately $149. This full-scale DAF plant would harvest 1,563 kg of algal biomass per day, with a cost per kilogram of algae at $0.81.
Author : VICENTE MIGUEL WITT
Publisher :
ISBN 13 :
Total Pages : 344 pages
Book Rating : 4.3/5 (91 download)
Download or read book NITROGEN AND PHOSPHORUS REMOVAL FROM SECONDARY SEWAGE PLANT EFFLUENTS BY ALGAE. written by VICENTE MIGUEL WITT and published by . This book was released on 1959 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christian Schaum
Publisher : IWA Publishing
ISBN 13 : 1780408358
Total Pages : 592 pages
Book Rating : 4.7/5 (84 download)
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.
Author : Kevin D. Stark
Publisher :
ISBN 13 :
Total Pages : 75 pages
Book Rating : 4.:/5 (876 download)
Download or read book Improved Phosphorus Removal in Wastewater Through Combined Bacterial and Algal Treatment written by Kevin D. Stark and published by . This book was released on 2012 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasingly strict nutrient regulations propel the need to develop more sustainable methods to remove nitrogen (N) and phosphorus (P) from wastewater. Algae show promise in their ability to uptake P. The purpose of this research was to propose an ANOA system (ANoxic, Oxic, Algae), testing a bench scale modified Ludzack-Ettinger (MLE) system coupled with an algaebased continuous stir tank reactor (algae CSTR). The system was tested for its P treatment efficacy, focusing on the performance of the algae CSTR. The algae system could uptake up to 55% of P at the influent concentration of 6 mg/L. However, the presence of large flocs of bacteria in the algae CSTR resulted in a decrease and eventually a ceasing of P uptake. Phosphorus adsorption and uptake resulted in the algal biomass containing P at about 6% of the total biomass dry weight. Based on cellular P distribution with about 90% extracellular (physic-chemical sorbed) and 10% intracellular P (biological uptake) by using an oxalic acid rinse reagent, P removal in algae CSTR was mainly attributed to physical/chemical processes including P adsorption and coprecipitation with cations at relatively high pH environment due to algal growth.
