Methods of Prediction Sulfide Production in Sewerage

Document Type : review paper

Authors

1 Ferdowsi University Of Mashhad

2 Islamic Azad University Tonekabon Branch

Abstract

Millions of dollars are being spent worldwide on the repair and maintenance of sewer networks and wastewater treatment plants every year. The production and emission of hydrogen Sulfide has been identified as a major cause of corrosion and odor problems in sewer networks. Prediction of hydrogen sulfide production in the sewer system helps the engineers and manager to obtain a proper strategy for their optimal management and for an analysis of reassurance. The purpose of this study is to review the selected models of predicting sulfide generation in sewerage that in this study the Equations of predicting sulfide generation are discussed. The status of any operational sewerage can be assessed, and the critical points can be recognized by using such equations. The results of this research show that sulfide buildup in sewerage is a function of hydraulic characteristics and qualitative. In most of the proposed models in this study the density of organic materials (BOD & COD) was considered as the main parameter in determining the amount of hydrogen sulfide creation in sewerage. It is notable that ORP and pH can also be used as an index in assessing sulfide creation in sewerage systems. Real time Decision-making is of great importance in the operationalization and management of the sewerage systems; therefore, the COD-based and BOD- based models are mostly suitable for technical studies and ORP-based models are of prime importance for operationalization. Finally, a study conducted in west of Mashhad on the accurate models show that Boon, Nielsen and Hvitved models provide a better prediction as compared with other models that used in this paper.

Keywords


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