Rain events and their effect on effluent quality studied at a full scale activated sludge treatment plant

The effect of rain events on effluent quality dynamics was studied at a full scale activated sludge wastewater treatment plant which has a process solution incorporating pre-denitrification in activated sludge with post-nitrification in trickling filters. The incoming wastewater flow varies signific...

Full description

Saved in:
Bibliographic Details
Published in:Water science and technology 2006-01, Vol.54 (10), p.201-208
Main Authors: Wilén, B M, Lumley, D, Mattsson, A, Mino, T
Format: Article
Language:English
Subjects:
Activated sludge
Atmospheric precipitations
Combined sewers
Data processing
Denitrification
Dynamics
Effluents
Filters
Fluid filters
Nitrification
Nitrogen - analysis
Nitrogen - isolation & purification
Rain
Removal
Settlers
Sewage
Sewer systems
Sludge
Sludge treatment
Snowmelt
Trickling filters
Waste Disposal, Fluid - methods
Wastewater
Wastewater treatment
Wastewater treatment plants
Water Purification - instrumentation
Water Purification - methods
Water treatment plants
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of rain events on effluent quality dynamics was studied at a full scale activated sludge wastewater treatment plant which has a process solution incorporating pre-denitrification in activated sludge with post-nitrification in trickling filters. The incoming wastewater flow varies significantly due to a combined sewer system. Changed flow conditions have an impact on the whole treatment process since the recirculation to the trickling filters is set by the hydraulic limitations of the secondary settlers. Apart from causing different hydraulic conditions in the plant, increased flow due to rain or snow-melting, changes the properties of the incoming wastewater which affects process performance and effluent quality, especially the particle removal efficiency. A comprehensive set of on-line and laboratory data were collected and analysed to assess the impact of rain events on the plant performance.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2006.721