Detergents in drainage systems for buildings

Current soil–waste–vent (SWV) system design guides aim to produce ventilated drainage networks for buildings which protect attached water trap seals from unwanted air pressure effects. Such effects may cause trap seal failure that are caused by airflow induction during discharge. The ventilation des...

Full description

Saved in:
Bibliographic Details
Published in:Water research (Oxford) 2001-03, Vol.35 (4), p.1086-1092
Main Authors: Campbell, D.P, MacLeod, K.D
Format: Article
Language:English
Subjects:
airflow
Applied sciences
Building technical equipments
Buildings
Buildings. Public works
detergent
Detergents
drainage
Exact sciences and technology
Facility Design and Construction
Models, Theoretical
Other wastewaters
Plumbing. Sanitary facilities
Pollution
Pressure
Sewage
simulation
stack
Surface-Active Agents
Ventilation
Wastewaters
Water treatment and pollution
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:Current soil–waste–vent (SWV) system design guides aim to produce ventilated drainage networks for buildings which protect attached water trap seals from unwanted air pressure effects. Such effects may cause trap seal failure that are caused by airflow induction during discharge. The ventilation design guides are based on steady-state experiments utilising cold clean water as a test media. However, most ‘grey’ and ‘black’ water sources are dosed with detergent, and are often warm, which significantly alters the behaviour when compared to clean water. Thus, current design standards provide only approximations of SWV system response. Results indicate that induced airflows in warm detergent-dosed water can be significantly higher than those measured in clean water systems, by a factor of more than 2. This paper quantifies the effect of detergents in SWV systems in terms of observed air entrainment rates and previously published research on the factors that contribute to air entrainment. Results of previous work are cast into dimensionless groupings suitable for inclusion into a mathematical simulation model based on a finite difference scheme. It utilises the method of characteristics as a solution technique to simulate drainage system operation via the equations that define unsteady partially filled or full bore pipe flows and the boundary conditions represented by water traps and other common system components.
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(00)00355-9