Nitrogen Transformations And Removal Mechanisms In Algal And Duckweed Waste Stabilisation Ponds
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Nitrogen Transformations And Removal Mechanisms In Algal And Duckweed Waste Stabilisation Ponds
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Author : Omar Zimmo
language : en
Publisher: CRC Press
Release Date : 2003-01-01
Nitrogen Transformations And Removal Mechanisms In Algal And Duckweed Waste Stabilisation Ponds written by Omar Zimmo and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-01-01 with Technology & Engineering categories.
Effective treatment of nitrogen containing wastewater is required to prevent eutrophication and groundwater pollution. This thesis shows that effective treatment may be combined with substantial nitrogen recovery in duckweed-based waste stabilization ponds.
Effect Of Operational Variables On Nitrogen Transformations In Duckweed Stabilization Ponds
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Author : Julia Rosa Caicedo Bejarano
language : en
Publisher: CRC Press
Release Date : 2005-03-24
Effect Of Operational Variables On Nitrogen Transformations In Duckweed Stabilization Ponds written by Julia Rosa Caicedo Bejarano and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-03-24 with Nature categories.
There is an urgent need to develop and improve low cost technologies for wastewater treatment. Simultaneously treating wastewater and producing duckweed in a pond system is, therefore, an attractive solution contributing to both environmental protection and food production. Duckweed has excellent qualities: a high protein content, a high growth rate and is an easy crop to handle. The small plant turns nitrogen from wastewater into a food source. This thesis reports on the effect of different operational variables, like anaerobic pre-treatment, the combination of algae and duckweed ponds and pond depth. Improved nitrogen removal was obtained through the combination of duckweed ponds with algae ponds. Duckweed pond systems could be designed with shallow depth without affecting nitrogen removal efficiency. This research is the result of the cooperative effort between the EIDENAR, Univalle, Cali, Colombia and the UNESCO-IHE Institute for Water Education in Delft, the Netherlands.
Effect Of Algal Biofilm And Operational Conditions On Nitrogen Removal In Waste Stabilization Ponds
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Author : Mohammed Babu
language : en
Publisher: CRC Press
Release Date : 2011-05-18
Effect Of Algal Biofilm And Operational Conditions On Nitrogen Removal In Waste Stabilization Ponds written by Mohammed Babu and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-05-18 with Science categories.
Discharge of nutrient rich wastewater causes eutrophication of surface water; therefore wastewater treatment before discharge is required. Wastewater stabilization ponds are low cost technology used by developing countries but not effective in nitrogen removal due to low nitrifier biomass in the water column. Introduction of surface area for attachment of nitrifiers has therefore been proposed. This thesis reports the performance of pilot scale wastewater stabilization ponds fitted with baffles. The effect of baffles on nitrogen removal under tropical and two operational conditions was investigated. Under TKN/BOD ratio of 0.67, the baffled ponds performed better in nitrogen removal than the control pond. Total nitrogen mass balances showed that nitrification-denitrification, algal uptake and sedimentation were principle nitrogen removal mechanisms in biofilm waste stabilization ponds This study shows the potential of biofilms in improving nitrogen removal in wastewater stabilization ponds. The BOD and TSS concentrations were sufficiently low to permit for reuse in irrigation. If the objective is reuse and optimization of resources, the effluents from the ponds had sufficient nitrogen content for use in agriculture.
Efficient Management Of Wastewater
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Author : Ismail Al Baz
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-01-12
Efficient Management Of Wastewater written by Ismail Al Baz and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-12 with Technology & Engineering categories.
Water reuse management is one of the challenges all water scarce countries have to deal with in the coming decades. The present book highlights non-conventional solutions within the field of wastewater treatment and reuse predominantly for professionals and decision makers. It focuses on technologies which are reliable, sustainable, low cost and suitable for rural and sub urban areas. In addition, particularly innovative on-site concepts are presented.
The Underlying Mechanisms For Nitrogen And Phosphorus Removal In High Rate Algal Ponds Used To Treat Brewery Effluent Harvesting Algae Using Filter Feeding Fish The Use Of Brewery Effluent In Agricultural Crop Production And Duckweed As Wastewater Treatment Solution
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Author : Clifford L. W. Jones
language : en
Publisher:
Release Date : 2016
The Underlying Mechanisms For Nitrogen And Phosphorus Removal In High Rate Algal Ponds Used To Treat Brewery Effluent Harvesting Algae Using Filter Feeding Fish The Use Of Brewery Effluent In Agricultural Crop Production And Duckweed As Wastewater Treatment Solution written by Clifford L. W. Jones and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Algae culture categories.
Project Eden is an experimental facility at Ibhayi Brewery in Port Elizabeth, which consists of an integrated algal ponding system, a constructed wetland, aquaculture, hydroponic and crop production facilities. It was designed to treat brewery effluent using alternative technologies that add value to the products that are produced as part of the process.
Domestic Wastewater Treatment In Developing Countries
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Author : Duncan Mara
language : en
Publisher: Routledge
Release Date : 2013-06-17
Domestic Wastewater Treatment In Developing Countries written by Duncan Mara and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-17 with Nature categories.
Affordable and effective domestic wastewater treatment is a critical issue in public health and disease prevention around the world, particularly so in developing countries which often lack the financial and technical resources necessary for proper treatment facilities. This practical guide provides state-of-the-art coverage of methods for domestic wastewater treatment and provides a foundation to the practical design of wastewater treatment and re-use systems. The emphasis is on low-cost, low-energy, low-maintenance, high-performance 'natural' systems that contribute to environmental sustainability by producing effluents that can be safely and profitably used in agriculture for crop irrigation and/or in aquaculture, for fish and aquatic vegetable pond fertilization. Modern design methodologies, with worked design examples, are described for waste stabilization ponds, wastewater storage and treatment reservoirs; constructed wetlands, upflow anaerobic sludge blanket reactors, biofilters, aerated lagoons and oxidation ditches. This book is essential reading for engineers, academics and upper-level and graduate students in engineering, wastewater management and public health, and others interested in sustainable and cost-effective technologies for reducing wastewater-related diseases and environmental damage.
Plant Metal Interaction
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Author : Parvaiz Ahmad
language : en
Publisher: Elsevier
Release Date : 2016-02-02
Plant Metal Interaction written by Parvaiz Ahmad and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-02-02 with Technology & Engineering categories.
Plant Metal Interaction: Emerging Remediation Techniques covers different heavy metals and their effect on soils and plants, along with the remediation techniques currently available. As cultivable land is declining day-by-day as a result of increased metals in our soil and water, there is an urgent need to remediate these effects. This multi-contributed book is divided into four sections covering the whole of plant metal interactions, including heavy metals, approaches to alleviate heavy metal stress, microbial approaches to remove heavy metals, and phytoremediation. Provides an overview of the effect of different heavy metals on growth, biochemical reactions, and physiology of various plants Serves as a reference guide for available techniques, challenges, and possible solutions in heavy metal remediation Covers sustainable technologies in uptake and removal of heavy metals
Pathogen Removal Mechanisms In Macrophyte And Algal Waste Stabilization Ponds
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Author : E. Awuah
language : en
Publisher: CRC Press
Release Date : 2007-01-18
Pathogen Removal Mechanisms In Macrophyte And Algal Waste Stabilization Ponds written by E. Awuah and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-01-18 with Technology & Engineering categories.
Pathogen removal mechanisms in macrophyte and algal-based waste stabilization ponds were studied in Ghana and Colombia. The macrophytes used were water lettuce (Pistia stratiotes) and duckweeds (Lemna paucicostata and Spirodela polyrhiza). The selection of the species was based on economic importance and availability. Lemna was used during the initial investigations. However, Lemna could not withstand the ammonia levels in the wastewater used. Spirodela polyrhiza a rarer species in Ghana was therefore used in subsequent studies. The main mechanisms considered in this study were pH, protozoa predation and surface attachment. The microorganisms used were faecal bacteria namely; Escherichia coli, other coliforms, Salmonella sp., other enterobacteria, E. coli, ATCC13706 and enterococci. Studies were conducted using batch scale, continuous flow bench and pilot scale ponds. Results indicated in order of importance that long retention periods, attachment, sedimentation, predation and low pH are mechanisms in macrophyte ponds enhancing faecal bacteria removal, while in the algal ponds long retention periods, sunlight penetration, high pH, attachment and sedimentation are the mechanisms of importance in faecal bacteria removal. Presence of protozoa was also found to be important but true grazing studies could not be quantified. Dissolved oxygen did not play a major role in faecal bacteria removal.
Water And Nutrient Management In Natural And Constructed Wetlands
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Author : Jan Vymazal
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-09-23
Water And Nutrient Management In Natural And Constructed Wetlands written by Jan Vymazal and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-09-23 with Technology & Engineering categories.
Natural and constructed wetlands play a very important role within the landscape and their ecological services are highly valuable. Water management, including flood water retention, biomass production, carbon sequestration, wastewater treatment and as a biodiversity source are among the most important ecological services of wetlands. In order to provide these services, wetlands need to be properly evaluated, protected and maintained. This book provides results of the latest research in wetland science around the world. Chapters deal with such topics as the use of constructed wetlands for treatment of various types of wastewater, use of constructed wetlands in agroforestry, wetland hydrology and evapotranspiration, the effect of wetlands on landscape temperature, and chemical properties of wetland soils.
The Kasetsart Journal
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Author :
language : en
Publisher:
Release Date : 2008
The Kasetsart Journal written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Agriculture categories.