Evaluation of Selected Reaeration Models for Water Quality Management

Evaluation of Selected Reaeration Models for Water Quality Management

Lukman Salihu (University of Hafr Al-Batin, Saudi Arabia), Adekunbi E. Adedayo (Adeyemi Colloege of Education, Nigeria), Babajide Jelili Olalekan (Adeyemi Colloege of Education, Nigeria), Asani M. Afolabi (Ladoke Akintola University of Technology, Ogbomoso, Nigeria), Idi Dansuleiman Mohammed (Land, Air and Water Consulting Engineers, Nigeria), Isaiah Adesola Oke (Obafemi Awolowo University, Nigeria) and Obijole O. Adewale (Department of Ecology and Resources Management, School of Environmental Sciences, University of Venda, South Africa)
DOI: 10.4018/978-1-7998-1871-7.ch012

Abstract

In this chapter, a new proposed model was compared with selected standard models and evaluated statistically (model of selection criterion [MSC] and Akaike information criterion [AIC]). Suspended concentration and calculated reaeration rate were used to predict concentration of EPs removable by the aeration and self-purification of the stream. The study revealed that MSC for the new proposed model were 0.75, - 0.44, - 0.32, - 0.45, and - 0.45 respectively. AIC for both dry and wet seasons were 11.85, 42.17, 41.37, 42.17, and 42.25 for the new proposed model, respectively. It was concluded the proposed model performed better than some of the standard models.
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Background

Pollution is among severe and serious problem that urgently requires models for monitoring and implementation plans deriving solutions. Daily, domestic, institutional, industrial and agricultural wastes are discharged into the receiving water bodies (UN WWAP, 2003; Geissen et al., 2015). Equivalent amount of these pollutants from human activities get into human and ecosystems. The United Nation (UN) estimates that the amount of wastewater produced annually is about 1500 km3, which six times more water than exists in all the rivers of the world (UN WWAP, 2003). It was reported that lack of adequate sanitation practice is one of the most significant causes of water pollution. Worldwide, 2.5 billion people live without proper sanitation (UNICEF, 2009; Geissen et al.2015,). In some regions of the world, more than 50% of native freshwater fish species are at risk of extinction, and this is also the case for nearly one-third of the world's amphibians (Vié, Hilton-Taylor, and Stuart, 2009; Geissen et al.,2015).

Key Terms in this Chapter

EOCs: Emerging organic compounds.

DOP: Dioctyl phthalate.

TP: Total phosphorous.

DO: Dissolved oxygen.

PBDEs: Polybrominated diphenyl ethers.

BOD: Biochemical oxygen demand.

UWC: Urban water cycle.

TN: Total nitrogen.

COD: Chemical oxygen demand.

MSC: Model of selection criterion.

AOTs: Advanced oxidation technologies.

Eps: Emerging pollutants.

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