Effect Of Operational Variables On Nitrogen Transformations In Duckweed Stabilization Ponds
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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.
Greenhouse Gas Emissions From Ecotechnologies For Wastewater Treatment
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Author : Juan Pablo Silva Vinasco
language : en
Publisher: CRC Press
Release Date : 2021-02-25
Greenhouse Gas Emissions From Ecotechnologies For Wastewater Treatment written by Juan Pablo Silva Vinasco and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-02-25 with Science categories.
Ecotechnologies for wastewater treatment (EWWT) have been used as a cost-effective alternative to conventional wastewater treatment methods for improving the removal of organic carbon, nutrients and pathogenic microorganisms from wastewater. However, due to biochemical transformations of organic matter and nutrients EWWT are net sources of CO2, CH4 and N2O greenhouse gases (GHGs), which may be transferred into the atmosphere contributing to global warming. Greenhouse Gas Emissions from Ecotechnologies for Wastewater Treatment provides scientific information about greenhouse gas, such as CO2, CH4 and N2O, generation and emissions from different municipal EWWT. The main EWWT considered in this book are anaerobic ponds, facultative ponds, duckweed-based ponds, and a freshwater natural wetland perturbed by anthropogenic activities such as wastewater discharge and nutrients from agricultural run-off. The book includes a full literature review of recent publications about GHGs emissions from EWWT. It also introduces the calculation of GHGs flux using a static chamber technique. Besides, the book presents information on the influence of environmental factors such as temperature, pH, DO, and nutrients on GHG emissions produced in EWWT under tropical conditions. This book will be a useful reference for researches and students interested in the broader area of water and climate change subjects. The publication may also be of interest to policy makers concerned with climate change, water sector planning, and wastewater treatment.
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.
Avances En Investigaci N Y Desarrollo En Agua Y Saneamiento Para El Cumplimiento De Las Metas Del Milenio
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Author :
language : es
Publisher: Universidad del Valle
Release Date : 2007
Avances En Investigaci N Y Desarrollo En Agua Y Saneamiento Para El Cumplimiento De Las Metas Del Milenio written by and has been published by Universidad del Valle this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Drinking water categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1979
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Aeronautics categories.
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Chemical Abstracts
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Author :
language : en
Publisher:
Release Date : 2002
Chemical Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Chemistry categories.
Selected Water Resources Abstracts
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Author :
language : en
Publisher:
Release Date : 1981
Selected Water Resources Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Hydrology categories.
Selected Water Resources Abstracts
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Author :
language : en
Publisher:
Release Date : 1987
Selected Water Resources Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Water categories.
Research Journal Of The Water Pollution Control Federation
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Author :
language : en
Publisher:
Release Date : 1991
Research Journal Of The Water Pollution Control Federation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Sewage categories.