Sterols: a tracer of organic matter in combined sewers

2008 ◽  
Vol 57 (11) ◽  
pp. 1705-1712 ◽  
Author(s):  
S. Zgheib ◽  
M. C. Gromaire ◽  
C. Lorgeoux ◽  
M. Saad ◽  
G. Chebbo
Keyword(s):  
Organic Pollution ◽  
Organic Layer ◽  
Runoff Water ◽  
Sewer System ◽  
Total Absence ◽  
Combined Sewer ◽  
Combined Sewer System ◽  
Receiving Waters ◽  
Wet Weather ◽  
Organic Particles

The important organic pollution of combined wet weather flows (WWF), its acute impact on receiving waters have been widely demonstrated. The main three possibly origins for this organic pollution are: runoff water (streets and roofs), wastewater and erosion of sewer sediments in combined sewer system. This work, for tracing the origin of organic particles bound in combined sewer system, has been focused on the innovative use of sterols. So, eight sterols have been selected and analysed for each kind of sample. Results are represented in contents of sterols (μg g−1) and in sterol profiles (%).The comparison of contents and profiles leads the separation between two groups: runoff water, characterized by the total absence of coprostanol, epicoprostanol and coprostanone, and the group of sewer deposits (gross bed sediment (GBS), organic layer (OL), biofilms) and wastewater. Moreover, sewer deposits and wastewater can be distinguished by their sterol contents and profiles. To evaluate their contribution to WWF a comparison between sterol signatures is done which shows that these effluents have a strong similarity in profiles and in contents of sterols to the organic layer.

HYDROCARBON LOADS FROM STREET CLEANING PRACTICES: COMPARISON WITH DRY AND WET WEATHER FLOWS IN A PARISIAN COMBINED SEWER SYSTEM

2005 ◽  
Vol 25 (2) ◽  
pp. 169-181 ◽  
Author(s):  
Johnny Gasperi ◽  
Vincent Rocher ◽  
Régis Moilleron ◽  
Ghassan Chebbo
Keyword(s):  
Sewer System ◽  
Combined Sewer ◽  
Combined Sewer System ◽  
Wet Weather

Settleable Solids in a Combined Sewer System – Measurement, Quantity, Characteristics

1992 ◽  
Vol 25 (8) ◽  
pp. 181-188 ◽  
Author(s):  
S. Michelbach ◽  
C. Wöhrle
Keyword(s):  
Heavy Metals ◽  
Settling Velocity ◽  
Organic Pollution ◽  
Stormwater Treatment ◽  
Organic Micropollutants ◽  
Sewer System ◽  
Sewer Systems ◽  
Combined Sewer ◽  
Combined Sewer System ◽  
The Relationship

Sediment and transportation of mineral and organic pollution in combined sewer systems are not completely understood. For better understanding, samples of sediment, slime and urban runoff were taken from the combined sewer system of Bad Mergentheim. The sedimentation velocity of settleable solids was measured with a settling apparatus. Typical settling curves for sediment, slime and wastewater were compiled. Some of the samples were analysed for heavy metals and organic micropollutants. By this the relationship between settling velocity and the load of heavy metals can be shown. The gained data are of interest to size clarifier tanks for stormwater treatment.

MANAGING WET WEATHER FLOWS USING REAL TIME CONTROLS FOR THE WASHINGTON, D.C. COMBINED SEWER SYSTEM

2001 ◽  
Vol 2001 (8) ◽  
pp. 110-118
Author(s):  
Monir Chowdhury ◽  
Srinivasan Rangarajan ◽  
John Cassidy ◽  
Mohsin Siddique
Keyword(s):  
Real Time ◽  
Sewer System ◽  
Combined Sewer ◽  
Combined Sewer System ◽  
Wet Weather

Urban Storm Water Discharges: Effects upon Communities of Sessile Diatoms and Macro-Invertebrates

1990 ◽  
Vol 22 (10-11) ◽  
pp. 147-154 ◽  
Author(s):  
G. D. Willemsen ◽  
H. F. Gast ◽  
R. O. G. Franken ◽  
J. G. M. Cuppen
Keyword(s):  
Organic Pollution ◽  
Constant Flow ◽  
Combined Sewer Overflows ◽  
Sewer System ◽  
Sewer Systems ◽  
Combined Sewer ◽  
Receiving Waters ◽  
Sewer Overflows ◽  
Urban Storm

From 1985 to 1987, long-term and more or less permanent effects of discharges from combined or separate sewer systems on communities of sessile diatoms and macro-invertebrates in receiving waters have been studied. Sessile diatoms and/or macro-invertebrates have been investigated on 46 locations, spread all over The Netherlands. The results were related to the type of sewer system, the discharges, and the characteristics of the receiving water, and compared with results from sample(s) taken from a corresponding water not influenced by sewer overflows, the reference water. In general, communities of sessile diatoms and macro-invertebrates indicate a more severe organic pollution and disturbance of receiving waters compared with reference waters. In the immediate vicinity of the overflows these communities were more disturbed than at some distance. In small ditches, effects were more pronounced compared with large waterbodies and waters with a constant flow regime. Finally, effects of combined sewer overflows were more pronounced than effects of discharges from separate sewer systems, except for locations in industrial areas.

Origins and characteristics of urban wet weather pollution in combined sewer systems: the experimental urban catchment “Le Marais” in Paris

1998 ◽  
Vol 37 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Marie-Christine Gromaire-Mertz ◽  
Ghassan Chebbo ◽  
Mohamed Saad
Keyword(s):  
Waste Water ◽  
Sewer System ◽  
Urban Catchment ◽  
Rainfall Events ◽  
Sources Of Pollution ◽  
Sewer Systems ◽  
Combined Sewer ◽  
Wet Weather ◽  
Wet Weather Flow ◽  
Different Sources

An experimental urban catchment has been created in the centre of Paris, in order to obtain a description of the pollution of urban wet weather flows at different levels of the combined sewer system, and to estimate the contribution of runoff, waste water and sewer sediments to this pollution. Twenty-two rainfall events were studied from May to October 1996. Dry weather flow was monitored for one week. Roof, street and yard runoff, total flow at the catchment outlet and waste water were analysed for SS, VSS, COD and BOD5, on both total and dissolved fraction. Results show an evolution in the characteristics of wet weather flow from up to downstream: concentrations increase from the catchment entry to the outlet, as well as the proportion of particle-bound pollutants and the part of organic matter. A first evaluation of the different sources of pollution establishes that a major part of wet weather flow pollution originates from inside the combined sewer, probably through erosion of sewer sediments.

Reducing Pollutant Loads from Philadelphia's Combined Sewer System with Green Stormwater Infrastructure

2012 ◽  
Vol 2012 (5) ◽  
pp. 952-965 ◽  
Author(s):  
Matthew J. Vanaskie ◽  
Jim Smullen ◽  
Rajesh Rajan ◽  
Mark Maimone ◽  
Marc Cammarata
Keyword(s):  
Sewer System ◽  
Pollutant Loads ◽  
Combined Sewer ◽  
Combined Sewer System ◽  
Green Stormwater Infrastructure

Cesium and strontium loads into a combined sewer system from rainwater runoff

2016 ◽  
Vol 183 ◽  
pp. 1041-1049 ◽  
Author(s):  
Nao Kamei-Ishikawa ◽  
Daiki Yoshida ◽  
Ayumi Ito ◽  
Teruyuki Umita
Keyword(s):  
Sewer System ◽  
Combined Sewer ◽  
Combined Sewer System ◽  
Rainwater Runoff
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