Demonstration of an adaptation to the activated sludge process; for reduced sludge generation

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Resource or Project Abstract

Disposal of excess sludge from wastewater treatment is a growing problem in Ireland and across Europe. Sludge processing, handling and disposal costs comprising a significant portion of treatment plant operating costs. Technologies to reduce sludge generation have been found to be expensive,require addition of toxic chemicals or significant changes to plant operation. This project demonstrates an adaptation to conventional activated sludge treatment for redcued sludge generation. A two channel lab scale pilot plant was demonstrated with synthetic and real wastewater. Numerous operation problems were encountered during on-site demonstration whih limitted useful data obtained. Longer term study of this process is warranted to verify suggested trends of reduced biomass generation at pH 6.0-6.2. Slower biomass build up was seen under acid dosing but this was accompanied by solids losses in effluent. Larger scale demonstration could overcome some of the settling and solids loss problems which are amplified at smaller scale. Further work is needed to best incorporate this process into an effective and reliable wastewater treatment engineering solution.

A Masters Thesis is also attached to this resource "Design of a twin-lane lab scale activated sludge plant" by Mr. Eric McGeough who was supervised by Dr. Prunty.

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Contact Information for This Resource

Dr. Ciarán Prunty
Queen's University Belfast

Dr. Elaine Groom
Queen's University Belfast

Dr. John McGrath
Queen's University Belfast

Dr. John Quinn
Queen's University Belfast

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Data, Files, Information Objects Related To This Project Resource

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Attachment Name and Download Link
Att 1    2008-ET-DS-1-S2-Masters-Thesis.pdf   (1.86 Mb)
Att 2   (1.1 Mb)

Suggested Citation Information

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Author(s)Prunty, C. Groom, E. McGrath, J. Quinn, J.
Title Of WebsiteSecure Archive For Environmental Research Data
Publication InformationDemonstration of an adaptation to the activated sludge process; for reduced sludge generation
Name of OrganisationEnvironmental Protection Agency Ireland
Electronic Address or URL
Unique Identifierc193bf32-9362-102d-ba42-8e912b2741d0
Date of AccessLast Updated on SAFER: 2024-06-20

An example of this citation in proper usage:

Prunty, C. Groom, E. McGrath, J. Quinn, J.   "Demonstration of an adaptation to the activated sludge process; for reduced sludge generation". Associated datasets and digitial information objects connected to this resource are available at: Secure Archive For Environmental Research Data (SAFER) managed by Environmental Protection Agency Ireland (Last Accessed: 2024-06-20)


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Access Information For This Resource

SAFER-Data Display URL
Resource KeywordsActivated, sludge, phosphorus, wastewater, reduction
EPA/ERTDI/STRIVE Project Code2008-ET-DS-1-S2
EPA/ERTDI/STRIVE Project ThemeEnvironmental Technologies
Resource Availability: Any User Can Download Files From This Resource
Limitations on the use of this ResourceThe authors must be contacted for any commerical, non research use of this data. If the data is used and the associated work is published in: report, journal papers, books, prints, or presentations - the authors should be cited - see automatically generated citation below as a guide.
Number of Attached Files (Publicly and Openly Available for Download): 2
Project Start Date Tuesday 1st January 2008 (01-01-2008)
Earliest Recorded Date within any attached datasets or digital objects Monday 12th January 2009 (12-01-2009)
Most Recent Recorded Date within any attached datasets or digital objects Sunday 11th October 2009 (11-10-2009)
Published on SAFERWednesday 7th April 2010 (07-04-2010)
Date of Last EditThursday 26th May 2011 at 10:44:56 (26-05-2011)
Datasets or Files Updated On Thursday 26th May 2011 at 10:43:26 (26-05-2011)

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Geographical and Spatial Information Related To This Resource

Description of Geographical Characteristics of This Project or Dataset
Lab based trials (12/01/09 - 06/04/09) were performed at The QUESTOR Centre laboratories in David Keir Building, Stranmillis Road, Belfast. On-site trials (05/05/09 - 11/10/09) were carried out at Newtownbreda Wastewater treatment works, Galwally Avenue, Belfast

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Supplementary Information About This Resource

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Lineage information about this project or dataset
This project came out of observations from other research into enhanced phosphorus uptake from wastewater by activated sludge microorganisms exposed to pH shock conditions. There are links with the previously funded EPA ERTDI project Biological approaches to nutrient removal in the Irish food sector (2001-LS-FW2-M1). Sludge reduction is a major economic driver across the EU. The Landfill Directive is limitting opportunity for biodegradable wastewate sludges (biosolids) disposal to landfill.
Supplementary Information
The data set is a file of the main operational data from the pilot plant during lab and on-site trials. Data is given for inlet and outlets from channels A and B. A wide range of commonly measured wastewater quality parameters are included. Excel files were used for data collection. These were saved as Office 2003 compatible versions.

Special thanks to Northern Ireland Water for facilitating the on-site demonstration and supporting the project along with Enva Ireland Ltd.
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