Nitrogen transformation pathways and removal mechanisms in domestic wastewater treatment by maturation ponds PDF Download

Author: Miller Alonso Camargo Valero
Publisher:
ISBN:
Category :
Languages : en
Pages : 328

View

Book Description

Author: Omar Zimmo
Publisher: CRC Press
ISBN: 9789058095763
Category : Technology & Engineering
Languages : en
Pages : 148

View

Book Description
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.

Author: Jose Roman Perez-Castineira
Publisher: Frontiers Media SA
ISBN: 288966810X
Category : Science
Languages : en
Pages : 157

View

Book Description

Author: Eleanor Relton Claire van der Linde
Publisher:
ISBN:
Category :
Languages : en
Pages : 456

View

Book Description

Author: Matti Valve
Publisher: Nordic Council of Ministers
ISBN: 9789291207091
Category : Water
Languages : en
Pages : 276

View

Book Description

Author: United States. Environmental Protection Agency. Office of Technology Transfer
Publisher:
ISBN:
Category : Nitrification
Languages : en
Pages : 466

View

Book Description

Author: Eleanor Relton Claire Van der Linde
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description

Author: Korneel Rabaey
Publisher: IWA Publishing
ISBN: 184339233X
Category : Science
Languages : en
Pages : 525

View

Book Description
In the context of wastewater treatment, Bioelectrochemical Systems (BESs) have gained considerable interest in the past few years, and several BES processes are on the brink of application to this area. This book, written by a large number of world experts in the different sub-topics, describes the different aspects and processes relevant to their development. Bioelectrochemical Systems (BESs) use micro-organisms to catalyze an oxidation and/or reduction reaction at an anodic and cathodic electrode respectively. Briefly, at an anode oxidation of organic and inorganic electron donors can occur. Prime examples of such electron donors are waste organics and sulfides. At the cathode, an electron acceptor such as oxygen or nitrate can be reduced. The anode and the cathode are connected through an electrical circuit. If electrical power is harvested from this circuit, the system is called a Microbial Fuel Cell; if electrical power is invested, the system is called a Microbial Electrolysis Cell. The overall framework of bio-energy and bio-fuels is discussed. A number of chapters discuss the basics – microbiology, microbial ecology, electrochemistry, technology and materials development. The book continues by highlighting the plurality of processes based on BES technology already in existence, going from wastewater based reactors to sediment based bio-batteries. The integration of BESs into existing water or process lines is discussed. Finally, an outlook is provided of how BES will fit within the emerging biorefinery area.

Author: Duncan Mara
Publisher: Routledge
ISBN: 1136567925
Category : Nature
Languages : en
Pages : 311

View

Book Description
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.

Author: E. Awuah
Publisher: CRC Press
ISBN: 9781138468696
Category :
Languages : en
Pages :

View

Book Description
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.