Controlled dosing of nitrate for prevention of HS in a sewer network and the effects on the subsequent treatment processes

Bentzen, Greta; Smith, AC; Bennett, Daniel; Webster, N. J.; Reinholt, F.; Sletholt, E.; Hobson, J. A.

doi:10.1016/0273-1223(95)00346-o

Cited by 41 publications

(1 citation statement)

References 3 publications

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“…Although the effectiveness of nitrate dosage, for odor control in sewer networks is well documented (Bentzen et al 1995;AEesøy et al 1997;Rodríguez-Gó mez et al 2005), the knowledge in anoxic transformation kinetics in sewer wastewater is rather limited. Abdul-Talib et al (2002a) has studied heterotrophic denitrification in bulk sewer wastewater and has concluded that it can be simulated as a twostage process as heterotrophic denitrification is controlled by nitrite, as it accumulates in bulk phase until nitrate is completely reduced.…”

Section: Introductionmentioning

confidence: 98%

Effect of temperature on anoxic sulfide oxidation and denitrification in the bulk wastewater phase of sewer networks

Mathioudakis

Aivasidis

2009

Water Science and Technology

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Artificial dosage of nitrate in sewer networks is considered as one of the most effective methods for odor and corrosion control. However, there is limited knowledge on the effect of temperature on the transformations that takes place during anoxic conditions. Thus, two groups of batch experiments were conducted to gain insight in the involved processes in bulk phase of a septic municipal wastewater. It can be concluded that sewer denitrification, in bulk phase, can be simplified in three stages. According to the experimental results, nitrate or nitrite is utilized for autotrophic denitrification with sulfide, while heterotrophic utilization is initiated after the completion of anoxic sulfide oxidation. Moreover, temperature is proved to have a significant impact on sewer denitrification kinetic profile, as it determines the extent of temporal nitrite accumulation. The temperature coefficient of each anoxic process, including sulfide oxidation, nitrate utilization and denitrification/nitrite utilization is experimentally calculated and temperature dependent equations are developed, providing the rate of all anoxic processes in bulk phase of sewer wastewater, in any given temperature.

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Section: Introductionmentioning

confidence: 98%

Effect of temperature on anoxic sulfide oxidation and denitrification in the bulk wastewater phase of sewer networks

Mathioudakis

Aivasidis

2009

Water Science and Technology

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Modeling of Water Quality in Sewers

Mark

2004

Water Encyclopedia

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Modeling of water quality in sewers emerged during the late 1990s. The water quality and amount of water in sewers are dominant factors for designing wastewater treatment plants and for analyzing water quality impacts from sewer overflows. In addition, sewage under anaerobic conditions may cause corrosion of pipes, malodors, and pose health risks for sewage workers. Hence, it is of utmost importance to analyze and understand the transport and transformation of wastewater in sewers. Ideally, modeling of sewer systems and wastewater treatment plants should be based on the same general principles and done in integrated models to pursue an integrated understanding and management of sewers, wastewater treatment plants, and receiving waters. However, it must be stressed that the transformation of wastewater in sewers is not identical to the processes in activated sludge and biofilm systems—so even though several similarities exist between sewers and wastewater treatment plants, modeling of water quality in sewers is a discipline of it own. This article focuses on how to model water quality in sewers.

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