Determination of COD, BOD, and suspended solids loads during combined sewer overflow (CSO) events in some combined catchments in Spain

2005 ◽  
Vol 24 (3) ◽  
pp. 199-217 ◽  
Author(s):  
J. Suárez ◽  
J. Puertas
Keyword(s):  
Suspended Solids ◽  
Combined Sewer Overflow ◽  
Combined Sewer ◽  
Sewer Overflow

Application of Faecal Sterol Ratios in Sediments and Effluents as Source Tracers

2001 ◽  
Vol 36 (4) ◽  
pp. 781-792 ◽  
Author(s):  
Chris Marvin ◽  
John Coakley ◽  
Tatiana Mayer ◽  
Mitra Brown ◽  
Lina Thiessen
Keyword(s):  
Meteorological Data ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Pig Manure ◽  
Combined Sewer Overflow ◽  
Physical Measurements ◽  
Combined Sewer ◽  
Sewer Overflow

Abstract An analytical method to determine faecal sterols was developed and applied to the analysis of samples including pig manure, sewage treatment plant sludge and combined sewer overflow effluent. Compounds including coprostanol (5β-cholestan-3β-ol), epicoprostanol (5β-cholestan-3α-ol), cholesterol (cholestan-5-en-3β-ol) and dihydrocholesterol (cholestanol, 5α-cholestan-3β-ol) were quantified in these source samples and their relative ratios calculated to investigate their potential application as source tracers. A mean coprostanol:epicoprostanol ratio of 7.6 ± 1.17 was calculated for pig manure samples from three Ontario livestock operations. This ratio was much lower (approximately 1.8) for sewage treatment plant sludge while the ratio for a combined sewer overflow effluent was very high (approximately 70). This approach, with the addition of physical measurements (e.g., current velocities) and meteorological data, may assist in determination of the influence of shore-based activities, including sewage treatment and livestock operations, on aquatic systems.

Constructed wetlands for combined sewer overflow treatment in a Mediterranean country, Portugal

2013 ◽  
Vol 67 (12) ◽  
pp. 2739-2745 ◽  
Author(s):  
R. Amaral ◽  
F. Ferreira ◽  
A. Galvão ◽  
J. S. Matos
Keyword(s):  
Constructed Wetlands ◽  
Retention Time ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Total Suspended Solids ◽  
Mediterranean Country ◽  
Combined Sewer Overflow ◽  
Combined Sewer ◽  
Removal Efficiencies ◽  
Sewer Overflow

The use of constructed wetlands as a valuable and attractive method for combined sewer overflow (CSO) treatment has been demonstrated in several studies. In Portugal, a Mediterranean country having usually a long dry period, there are still no applications of this technology. The purpose of this research is to gather information and know-how required for the design and management of this type of infrastructure. A pilot-scale experimental setup for CSO treatment was installed and evaluated in situ, in terms of organic matter, total suspended solids and microorganism removal with emphasis on the results of the start-up. After 1 day of retention average removal efficiencies of 73–79% and 82–89% were obtained in terms of chemical oxygen demand (COD) and total suspended solids (TSS), respectively. During the remaining retention time a slower removal was observed. After 7 days, the COD removal efficiencies reached 86–91% and the TSS removal efficiencies reached 93–97%. On average, after 1 day, reductions of 1.2–2.0 log and 1.9–2.4 log, respectively, for total coliforms and Enterococcus were observed. For a retention time of 7 days these reductions attained 4.0–4.9 log and 4.4–5.3 log, respectively.

Experience with Vortex Separators for Combined Sewer Overflow Control

1993 ◽  
Vol 27 (5-6) ◽  
pp. 93-104 ◽  
Author(s):  
H. Brombach ◽  
C. Xanthopoulos ◽  
H. H. Hahn ◽  
W. C. Pisano
Keyword(s):  
Separation Efficiency ◽  
Operational Reliability ◽  
Second Phase ◽  
Combined Sewer Overflow ◽  
Specific Storage ◽  
Impervious Area ◽  
Evaluation Phase ◽  
Combined Sewer ◽  
Sewer Overflow ◽  
Overflow Control

In 1987 the first vortex solids separator facility in Germany was installed for combined sewer overflow (CSO) control. The separation efficiency was optimized in the hydraulic laboratory using scaled down models with artificial tracers to simulate typical sewage particulates. The station has two parallel operating vortex separators and serves a connected and impervious area of about 11 hectares (ha) and 1,500 people. The specific storage volume of the station is 7.2 m3 per ha. Two evaluation programs were conducted. The first evaluation phase noted the operational reliability, hydraulic loads, overflow frequencies and water mass balances. The second phase monitored separation efficiencies. The evaluation showed that vortex solids separators are now ready for use in CSO control.

scholarly journals Treatment Shaft for Combined Sewer Overflow Detention

2010 ◽  
Vol 82 (5) ◽  
pp. 434-439
Author(s):  
Steven J. Wright ◽  
Saad Ghalib ◽  
Aziz Eloubaidy
Keyword(s):  
Combined Sewer Overflow ◽  
Combined Sewer ◽  
Sewer Overflow
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