Mitigation Design Elements of the 159-mgd West Point Secondary Treatment Plant Expansion

1992 ◽  
Vol 25 (4-5) ◽  
pp. 423-424
Author(s):  
G. A. Nicholson ◽  
L. G. Suhr ◽  
R. K. Sandaas
Keyword(s):  
Treatment Plant ◽  
West Point ◽  
Secondary Treatment ◽  
Design Elements ◽  
Plant Expansion ◽  
Mitigation Design

scholarly journals Life Cycle Assessment of Upgrading Primary Wastewater Treatment Plants to Secondary Treatment Including a Circular Economy Approach

2020 ◽  
Vol 13 ◽  
pp. 117862212093585 ◽  
Author(s):  
Karim M Morsy ◽  
Mohamed K Mostafa ◽  
Khaled Z Abdalla ◽  
Mona M Galal
Keyword(s):  
Wastewater Treatment ◽  
Circular Economy ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Scientific Progress ◽  
Primary Treatment ◽  
Secondary Treatment ◽  
Cumulative Impact ◽  
Process Energy ◽  
The Impact

Although significant progress has been achieved in the field of environmental impact assessment in many engineering disciplines, the impact of wastewater treatment plants has not yet been well integrated. In light of this remarkable scientific progress, the outputs of the plants as treated water and clean sludge have become potential sources of irrigation and energy, not a waste. The aim of this study is to assess the environmental impacts of upgrading the wastewater treatment plants from primary to secondary treatment. The Lifecycle Assessment Framework (ISO 14040 and 14044) was applied using GaBi Software. Abu Rawash wastewater treatment plant (WWTP) has been taken as a case study. Two scenarios were studied, Scenario 1 is the current situation of the WWTP using the primary treatment units and Scenario 2 is upgrading the WWTP by adding secondary treatment units. The study highlighted the influence and cumulative impact of upgrading all the primary WWTPs in Egypt to secondary treatment. With the high amount of energy consumed in the aeration process, energy recovery methods were proposed to boost the circular economy concept in Abu Rawash WWTP in order to achieve optimal results from environmental and economic perspectives.

Extending thermophilic anaerobic digestion for producing class a biosolids at the greater vancouver regional districts annacis island wastewater treatment plant

1998 ◽  
Vol 38 (8-9) ◽  
pp. 409-416 ◽  
Author(s):  
Steve Krugel ◽  
Leslie Nemeth ◽  
Craig Peddie
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Treatment Plant ◽  
Secondary Treatment ◽  
Class A ◽  
Innovative Process ◽  
Thermophilic Anaerobic Digestion ◽  
Extended Operation ◽  
Flow Through ◽  
Bleed Through

The Greater Vancouver Regional District (GVRD) is a major regional agency managing wastewater collection and treatment for Vancouver, Canada and surrounding municipalities. As part of their $ 600 million program to upgrade 2 major plants to secondary treatment, the GVRD was faced with the requirement to produce a treated biosolids meeting the equivalent of a U.S. EPA Class A product to assure success of their new biosolids beneficial use program. Various alternatives to achieve a Class A product were evaluated in detail. The GVRD selected a new and innovative process which they termed extended thermophilic anaerobic digestion. The characteristics of this process which help achieve required pathogen kills are the thermophilic operating temperatures and the series operation of reactors, cutting the bleed-through of pathogens observed in conventional complete mix systems. The new thermophilic digesters have been in operation since 1996 and the flow-through vessels required to complete “extended” operation will be complete in late 1998.

Liquid stream secondary treatment process design at the Annacis Island wastewater treatment plant of the Greater Vancouver sewerage and drainage district

1998 ◽  
Vol 38 (3) ◽  
pp. 51-60
Author(s):  
L. A. Slezak ◽  
M. K. Fries ◽  
L. R. Pickard ◽  
R. A. Palsenbarg
Keyword(s):  
Process Design ◽  
Biological Treatment ◽  
Treatment Process ◽  
Treatment Plant ◽  
Primary Treatment ◽  
Secondary Treatment ◽  
Liquid Stream ◽  
Process Improvements ◽  
Major Project ◽  
Design Construction

The Greater Vancouver Sewerage & Drainage District (GVS&DD) is a major regional wastewater agency serving Vancouver, British Columbia and surrounding municipalities. In the late 1980's it was mandated to upgrade its largest treatment plant from primary treatment to secondary treatment. From 1990 until the present the GVS&DD has engaged in Predesign, Design, Construction and Commissioning of the Annacis Island WWTP Secondary Upgrade. The size of the facility and the fact that no secondary treatment components were previously in place combined to make the upgrade a very large project valued at nearly $470 million CDN. This paper describes the major project components of the liquid stream process improvements. In addition to the major biological treatment components, other aspects of the project are described including, odour management, influent pumping, and primary treatment upgrades.

Pesticide inputs from the sewage treatment plant of Agrinio to River Acheloos, western Greece: occurrence and removal

2010 ◽  
Vol 62 (5) ◽  
pp. 1098-1105 ◽  
Author(s):  
N. Stamatis ◽  
D. Hela ◽  
I. Konstantinou
Keyword(s):  
Solid Phase ◽  
Wide Spectrum ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Mass Spectrometric ◽  
Analytical Determination ◽  
Phase Extraction ◽  
Secondary Treatment ◽  
Western Greece

This work reports the occurrence and the removal of a wide spectrum of pesticides in municipal wastewaters from the Agrinio region, Greece. Analytical determination was carried out by means of solid-phase extraction followed by gas chromatography equipped with flame thermionic and mass spectrometric detection. The herbicides atrazine, alachlor, isoproturon, and s-metolachlor and the insecticides diazinon, methidathion, fenthion and chlorpyriphos, were more frequently detected in influent and effluent samples while they were also detected in river samples. Isoproturon and diazinon showed the highest concentrations in influent samples that reached concentrations up to 2,328 and 1,486 ng L−1, respectively. Secondary treatment and cumulative removal rates for herbicides and insecticides ranged between 23–91%, 21–>99% and 36–>99%, 38–>99%, respectively. The data demonstrate that there are significant levels of pesticides entering river waterways.

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