Dynamic control of urban sewer systems to reduce combined sewer overflows and their adverse impacts

10.2166/wst.1992.0572 ◽

1992 ◽

Vol 26 (5-6) ◽

pp. 1295-1304 ◽

Cited By ~ 1

Author(s):

C. Jefferies

Keyword(s):

Research Centre ◽

Water Research ◽

Sewer Systems ◽

Combined Sewer ◽

Sewer Overflows ◽

The Uk

Visible pollution discharged from two combined sewer overflows were studied using passive Trash Trap devices and the UK Water Research Centre Gross Solids Sampler. Relationships are presented for the number of visible solids and the mass of gross solids discharged during an event. The differences in the behaviour of the overflow types are reported on and they are categorised using the Trash Traps.

Using data from monitoring combined sewer overflows to assess, improve, and maintain combined sewer systems

The Science of The Total Environment ◽

10.1016/j.scitotenv.2014.10.087 ◽

2015 ◽

Vol 505 ◽

pp. 1053-1061 ◽

Cited By ~ 14

Author(s):

A. Montserrat ◽

Ll. Bosch ◽

M.A. Kiser ◽

M. Poch ◽

Ll. Corominas

Keyword(s):

Sewer Systems ◽

Combined Sewer ◽

Sewer Overflows ◽

Using Data

Failure of sewage pumps: statistical modelling and impact assessment

10.2166/wst.2006.577 ◽

2006 ◽

Vol 54 (6-7) ◽

pp. 119-126

Author(s):

H. Korving ◽

M. Geise ◽

F. Clemens

Keyword(s):

Statistical Modelling ◽

Interarrival Time ◽

Environmental Damage ◽

Pump Failure ◽

Failure Data ◽

Sewer Systems ◽

Pumping Stations ◽

Combined Sewer ◽

Sewer Overflows

Sewage pumping stations are directly responsible for affecting performance, i.e. failing pumps may result in combined sewer overflows or flooding. However, failures of sewage pumps are not yet incorporated in sewer assessments due to lack of knowledge and data. This paper presents the analysis of pump failure data provided by two sewer management authorities in The Netherlands. Pump failures have been studied accounting for the nature of the failures, the operation and maintenance procedures of the management authority, the ageing of the pumps and the changes in the environment of pumps. The analysis shows that sewage pumps fail relatively often due to the composition of sewage and the discontinuous operation of the pumps. The interarrival time and the duration of failures are highly variable and independent of the pump type and the specific function of the pump. The results also indicate that the serviceability of sewer systems is significantly affected by failing pumps. As a consequence, part of the environmental damage due to CSOs (combined sewer overflows) can be avoided by improving maintenance of pumping stations.

Design and performance evaluation of a simplified dynamic model for combined sewer overflows in pumped sewer systems

Journal of Hydrology ◽

10.1016/j.jhydrol.2016.04.056 ◽

2016 ◽

Vol 538 ◽

pp. 609-624 ◽

Cited By ~ 14

Author(s):

Petra van Daal-Rombouts ◽

Siao Sun ◽

Jeroen Langeveld ◽

Jean-Luc Bertrand-Krajewski ◽

François Clemens

Keyword(s):

Performance Evaluation ◽

Dynamic Model ◽

Sewer Systems ◽

Combined Sewer ◽

Sewer Overflows ◽

And Performance

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

10.2166/wst.1990.0299 ◽

1990 ◽

Vol 22 (10-11) ◽

pp. 147-154 ◽

Cited By ~ 8

Author(s):

G. D. Willemsen ◽

H. F. Gast ◽

R. O. G. Franken ◽

J. G. M. Cuppen

Keyword(s):

Organic Pollution ◽

Constant Flow ◽

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.

Implementation of Hamilton-Wentworth Region’s Pollution Control Plan

Water Quality Research Journal ◽

10.2166/wqrj.1996.026 ◽

1996 ◽

Vol 31 (3) ◽

pp. 453-472 ◽

Cited By ~ 2

Author(s):

M. Stirrup

Keyword(s):

Wastewater Treatment ◽

Pollution Control ◽

Wastewater Treatment Plant ◽

Treatment Plant ◽

Control Measures ◽

Storm Events ◽

Control Plan ◽

Combined Sewer ◽

Sewer Overflows

Abstract The Regional Municipality of Hamilton-Wentworth operates a large combined sewer system which diverts excess combined sewage to local receiving waters at over 20 locations. On average, there are approximately 23 combined sewer overflows per year, per outfall. The region’s Pollution Control Plan, adopted by Regional Council in 1992, concluded that the only reasonable means of dealing with large volumes of combined sewer overflow in Hamilton was to intercept it at the outlets, detain it and convey it to the wastewater treatment plant after the storm events. The recommended control strategy relies heavily on off-line storage, with an associated expansion of the Woodward Avenue wastewater treatment plant to achieve target reductions of combined sewer overflows to 1–4 per year on average. The region has begun to implement this Pollution Control Plan in earnest. Three off-line detention storage tanks are already in operation, construction of a fourth facility is well underway, and conceptual design of a number of other proposed facilities has commenced. To make the best possible use of these facilities and existing in-line storage, the region is implementing a microcomputer-based real-time control system. A number of proposed Woodward Avenue wastewater treatment plant process upgrades and expansions have also been undertaken. This paper reviews the region's progress in implementing these control measures.

Methods for studying dissolved oxygen levels in coastal and estuarine waters receiving combined sewer overflows

10.2166/wst.1995.0081 ◽

1995 ◽

Vol 32 (2) ◽

pp. 95-103

Author(s):

José A. Revilla ◽

Kalin N. Koev ◽

Rafael Díaz ◽

César Álvarez ◽

Antonio Roldán

Keyword(s):

Dissolved Oxygen ◽

Coastal Waters ◽

Computational Cost ◽

Oxygen Deficit ◽

Alternative Methods ◽

Coastal Zones ◽

Sewer Systems ◽

Combined Sewer ◽

High Computational Cost

One factor in determining the transport capacity of coastal interceptors in Combined Sewer Systems (CSS) is the reduction of Dissolved Oxygen (DO) in coastal waters originating from the overflows. The study of the evolution of DO in coastal zones is complex. The high computational cost of using mathematical models discriminates against the required probabilistic analysis being undertaken. Alternative methods, based on such mathematical modelling, employed in a limited number of cases, are therefore needed. In this paper two alternative methods are presented for the study of oxygen deficit resulting from overflows of CSS. In the first, statistical analyses focus on the causes of the deficit (the volume discharged). The second concentrates on the effects (the concentrations of oxygen in the sea). Both methods have been applied in a study of the coastal interceptor at Pasajes Estuary (Guipúzcoa, Spain) with similar results.

A STRATEGY FOR MONITORING THE IMPACTS OF COMBINED SEWER OVERFLOWS ON THE OHIO RIVER

10.2166/wst.1994.0018 ◽

1994 ◽

Vol 30 (1) ◽

pp. 167-175

Author(s):

Alan H. Vicory ◽

Peter A. Tennant

Keyword(s):

National Policy ◽

The United States ◽

Ohio River ◽

Treatment Technology ◽

Design Storm ◽

Combined Sewer ◽

Sewer Overflows ◽

Definition Of ◽

And Control

With the attainment of secondary treatment by virtually all municipal discharges in the United States, control of water pollution from combined sewer overflows (CSOs) has assumed a high priority. Accordingly, a national strategy was issued in 1989 which, in 1993, was expanded into a national policy on CSO control. The national policy establishes as an objective the attainment of receiving water quality standards, rather than a design storm/treatment technology based approach. A significant percentage of the CSOs in the U.S. are located along the Ohio River. The states along the Ohio have decided to coordinate their CSO control efforts through the Ohio River Valley Water Sanitation Commission (ORSANCO). With the Commission assigned the responsibility of developing a monitoring approach which would allow the definition of CSO impacts on the Ohio, research by the Commission found that very little information existed on the monitoring and assessment of large rivers for the determination of CSO impacts. It was therefore necessary to develop a strategy for coordinated efforts by the states, the CSO dischargers, and ORSANCO to identify and apply appropriate monitoring approaches. A workshop was held in June 1993 to receive input from a variety of experts. Taking into account this input, a strategy has been developed which sets forth certain approaches and concepts to be considered in assessing CSO impacts. In addition, the strategy calls for frequent sharing of findings in order that the data collection efforts by the several agencies can be mutually supportive and lead to technically sound answers regarding CSO impacts and control needs.