Odorous emissions from sewer systems can cause an impact to local communities. A survey of 9 Australian wastewater utilities that serve over 8.4 million people and operate over 59,000 km of sewer networks was undertaken to assess the current management practises used for sewer odour abatement. The survey results indicated that activated carbon based systems are the most common, most processes a...

Measurement of intertidal rock assemblages was investigated as a potential biological indicator to provide a quantitative estimate of the impact of urbanised catchment discharge on the estuaries of Sydney, Australia, from 1995 to 1999. Based on the presence and characteristics of adjacent human activities, sampling locations were categorised as: Bush; Urban; Urban with Sewer Overflows; and Indu...

The paper deals with the new control method developed for the pressure sewer systems. This method eliminates the disadvantages of currently common used on-off regulation. The major disadvantage is a transition of inconstancies of the effluent production into the sewage system. The propose method is primarily based on the principle of an allocation of the drawing off into the given time slots. T...

Fiji, an upper-middle income state in the Pacific Ocean, has experienced an increase in confirmed case notifications of enteric fever caused by Salmonella enterica serovar Typhi (S. Typhi). To characterize the epidemiology of typhoid exposure, we conducted a cross-sectional sero-epidemiological survey measuring IgG against the Vi antigen of S. Typhi to estimate the effect of age, ethnicity, and...

Discharges of untreated wastewater from combined sewer overflows (CSOs) can affect hydraulic stress and have significant environmental impacts on receiving water bodies. Common flow rate and water level sensors for monitoring of CSO events are expensive in terms of investment costs, installation, operation and maintenance. This paper presents a novel surrogate method to detect CSO events by usi...

The construction of tunnels in rock terrain has increased importance around the world as need for new transportation routes and water wastewater conveyances grown. Large cities nearby suburbs have limited space extensive, above-ground thoroughfares; therefore, underground systems may be only viable means developing infrastructure. Excessive groundwater inflow into under can injury personnel ter...

Combined sewer overflow (CSO) structures are constructed to effectively discharge excess water during heavy rainfall, to protect the urban drainage system from hydraulic overload. Consequently, most CSO structures are not constructed according to basic hydraulic principles for ideal measurement weirs. It can, therefore, be a challenge to quantify the discharges from CSOs. Quantification of CSO ...

In order to perform simulations of the integrated wastewater system, state variables of sub-system models (sewer, activated sludge, river) must be translated from one model to the other. A connector between ASM1 (Henze et al. 2000) and RWQM1 (Shanahan et al. 2001) is described in this paper to introduce the general approach developed to overcome this necessity. Inherent features of this connect...

This research investigated the application of Bio-Amp, a commercial bio-additive for the treatment of fat, oil, and grease (FOG) in a grease trap, and evaluated potential impacts of treated effluent on downstream collection system and treatment processes. Results show that after Bio-Amp treatment, FOG deposit formation was reduced by 40%, implicating a potential reduction of sewer line blockage...

INTRODUCTION 4 This subject, Urban Wet-Weather Flows, was comprised of three basic subareas – combined-sewer 5 overflows (CSOs), sanitary-sewer overflows (SSOs), and stormwater discharges. Major proceedings 6 related to wet-weather flow (WWF) published during 2000 were the following: (1) ASCE EWRI 7 Conference – Bridging the Gap: Meeting the World’s Water and Environmental Resources Challenges ...