Journal of Food, Agriculture and Environment

Settlement and compressive properties of suspended solids in a domestic-institutional wastewater

Author(s):

I. A. Oke ^*, K.T. Oladepo, A.M. Olajumoke

Recieved Date: 2008-07-22, Accepted Date: 2008-11-02

Abstract:

It is well known that most of the projected global population increases will take place in third world countries that already suffer from land, water, food and health problems. Increasingly, the various water uses must be coordinated with and integrated into the overall water and land management of the region. Sustainability, public health, environmental protection and economics are key factors. More storage of water in artificial lakes and artificial recharge of underground water is necessary to save water during water surplus for use during water shortage. Domestic-institutional (DI) and municipal wastewaters can be an important water resource but its use must be carefully planned, treated and regulated to prevent adverse health effects due to contamination of groundwater. In this paper settlement and compressive properties of suspended solids in DI wastewater is presented. Column tests were carried out on a DI wastewater in a bench scale. Wastewater samples were collected from influent into Obafemi Awolowo University, Ile-Ife, waste stabilization pond and subjected to laboratory studies. Laboratory analysis of suspended solids in the samples was carried out using a standard method. Solids removed were analysed using isoconcentration curves and compressive times graph. The study revealed that 57% of suspended solids in the wastewater were removed at a depth of 1.20 m and at a retention time of 60 minutes. An analysis of isoconcentration curves shows that overall solids removal is 71 percent. Compression settling constant of the settled solids was found to be 5.50 x 10^-3 m per m x minute. Information on relationship between porosity, stress and the depth of landfill for development was provided to aid final disposal of the waste removed and to provide information for agricultural use of the landfill area.

Keywords:

Suspended solid, isoconcentration curves, domestic-institutional wastewater, compression settling constant, total stress, porosity, landfill

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Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 1
Category: Environment
Pages: 224-228

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