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Papers by Olanrewaju Olawale

Sustainable Water Resources Management

The establishment of piggery farms in residential areas is becoming an issue of public health con... more The establishment of piggery farms in residential areas is becoming an issue of public health concern owing to the discharge of its contaminated wastewater into the surrounding environment. Due to potential pollutants in these effluents, this study also attempted treating and recycling wastewater from selected piggery in FUTA community. The available piggery farms (medium and small-scale) cannot afford the cost of most existing municipal wastewater treatment plant. In furtherance, designing an effluent treatment plant made from locally available plastic materials which consist of bio-filters such as coarse, fine sand and activated carbon was considered. The water quality characteristics was carried out before the treatment of the wastewater in order to know the present contaminants. Moreover, the microbial-treated water was channeled into the filtration tank, where the larger particles of dirt (gravel and coarse sand) were removed. Also, grease and oil were removed by the activated ...

Plastics, owing to its widespread use in almost all sectors, has become a foremost important envi... more Plastics, owing to its widespread use in almost all sectors, has become a foremost important environmental threat facing humankind and recycling is considered the best and viable option to tackle this peril. The purpose of this research was to develop and evaluate PET bottles shredding and washing machine for waste management and recycling. The research was aimed at shredding PET bottles into required sizes with an area of 0.001m 2 (10mm x 10mm) for a plastic pelletizer. The machine developed performs washing, cleaning and shredding of PET bottles using rotating blades are arranged in auger-like manner, other features of the machine includes hopper, washing chamber, adjustable screen and centrifugal pump. The machine was designed with high consideration for safety, easy operation, efficiency and cost. The machine has the capacity to shred 50-75kg of PET bottles per hour. The recycling efficiency, shredding efficiency and percentage retention are the parameters used to evaluate the ...

This research was carried out to evaluate the coagulating effects of Moringa oleifera (Linnaeus) ... more This research was carried out to evaluate the coagulating effects of Moringa oleifera (Linnaeus) seed powder on wastewater at lower and higher concentration levels using Jar test. 10, 20, 30 and 40 ml of Moringa seed powder-prepared stock solution were used as lower concentration level, while 70, 80 and 90 ml were used as higher concentration level; and results compared. A control experiment was also set up . The pH, Temperature, Total Dissolved Solids, Conductivity and Total Suspended Solids were measured at 24 h post-treatment. Gas Chromatography–Mass Spectrometry was used to reveal chemical components in the ethanolic extract of M. oleifera seed powder. The optimum concentrations for Moringa coagulant at lower and higher concentration levels were 40 and 70 ml respectively. It was observed that 40 ml reduced the Total Suspended Solids of the wastewater from 1240 mg/l to 400 mg/l after 24 h settling interval with removal efficiency of 67.7%. Also, 70 ml reduced the Total Suspended ...

International Journal of Mathematical Sciences and Computing

Sustainable Water Resources Management

Wastewaters from four different sources were treated using locally developed plant, while treatme... more Wastewaters from four different sources were treated using locally developed plant, while treatment components included Azolla pinnata fern and palm kernel shell charcoal. The four wastewater sources were: domestic, municipal, aquaculture and industrial. Twenty-five parameters considered included: temperature, turbidity, electrical conductivity, pH, total suspended solid, total dissolved solids, total solid, acidity, total hardness, total nitrogen, total phosphorus, ammonical nitrogen, dissolved oxygen, biological oxygen demand and chemical oxygen demand. Metals analyzed also included; sodium, potassium, calcium, magnesium, zinc, iron, lead, copper, cadmium and manganese. From the results, considerable reduction in pollutant parameters were obtained in the four wastewaters after treatment. Complete (100%) removal efficiencies were obtained in cadmium and manganese in all the wastewaters except for aquaculture wastewater, while complete removal was obtained in lead and copper in aquaculture wastewater only. Similarly, turbidity, phosphorus and nitrogen recorded complete removal in all the wastewaters except for 75.7% removal of phosphorus in municipal wastewater. Other parameters reduced appreciably with statistically significant results at P < 0.05. This indicated high efficiency of the treatment plant, A. pinnata, in pollutants and metals’ removal, thereby making the treated four wastewaters good enough to be recycled for irrigation purposes.

International Journal of Phytoremediation

Abstract The competitive demand for water makes it a scarce resource for agricultural use. This n... more Abstract The competitive demand for water makes it a scarce resource for agricultural use. This necessitates wastewater reuse for irrigation and any other agricultural purpose, especially in developing countries where treatment of wastewaters is not a priority. The aim of this study was to evaluate the performance of a charcoal-based constructed wetland (CBCW) in treating aquaculture wastewater. Aquaculture wastewater from a Research Fishpond Farm was treated in a CBCW planted with Sacciolepsis africana and Commelina cyannae for 5 days retention time. Raw wastewater and the treated wastewater from the constructed wetland (CW) was sampled and the physicochemical parameters determined. The performance of the CW in treating aquaculture wastewater was conducted. The result showed that the CBCW was capable of removing 50% TSS, 88% COD, 93% BOD5, and 100% nitrate nitrogen. The pH and DO of the wastewater before treatment and after treatment ranged from 6.68 to 6.91 and 4.13 to 6.30 mg/l, respectively. Thus, CWs have great potential for the treatment of aquaculture wastewater and prevention of environmental degradation through wastewater treatment, thereby solving the problem of water scarcity for agriculture for optimum food production.

British Journal of Applied Science & Technology, 2016

A feasibility study was done on the combination of physical, biological and chemical treatment pr... more A feasibility study was done on the combination of physical, biological and chemical treatment processes using a wedge-wire screen, a two compartment septic tank and a multi-media anaerobic filtration tank with the addition of granulated activated carbon as an absorption media in the filtration tank. Experiments were conducted before and after treatment from four major abattoirs located in Akure, an urban city in South-Western Nigeria. Preliminary results indicated that the filtration tank has good potentials to substantially reduce odour, colour and pollution load of the slaughter-house effluents as a results of the activated carbon in it. Also, the septic tank was efficient in removing the sludge and reducing the pollution load. It also provided a good solid-liquid separation. The process removed up to 78% and 81% of the total COD and suspended solids respectively. The proposed process is an environmentally sound on-site facility and it is very easy to operate.

Advances in Research, 2015

European Journal of Social …, 2009

Journal of Civil, Construction and Environmental Engineering

International Journal of Clean Coal and Energy

Sustainable Water Resources Management

The establishment of piggery farms in residential areas is becoming an issue of public health con... more The establishment of piggery farms in residential areas is becoming an issue of public health concern owing to the discharge of its contaminated wastewater into the surrounding environment. Due to potential pollutants in these effluents, this study also attempted treating and recycling wastewater from selected piggery in FUTA community. The available piggery farms (medium and small-scale) cannot afford the cost of most existing municipal wastewater treatment plant. In furtherance, designing an effluent treatment plant made from locally available plastic materials which consist of bio-filters such as coarse, fine sand and activated carbon was considered. The water quality characteristics was carried out before the treatment of the wastewater in order to know the present contaminants. Moreover, the microbial-treated water was channeled into the filtration tank, where the larger particles of dirt (gravel and coarse sand) were removed. Also, grease and oil were removed by the activated ...

Plastics, owing to its widespread use in almost all sectors, has become a foremost important envi... more Plastics, owing to its widespread use in almost all sectors, has become a foremost important environmental threat facing humankind and recycling is considered the best and viable option to tackle this peril. The purpose of this research was to develop and evaluate PET bottles shredding and washing machine for waste management and recycling. The research was aimed at shredding PET bottles into required sizes with an area of 0.001m 2 (10mm x 10mm) for a plastic pelletizer. The machine developed performs washing, cleaning and shredding of PET bottles using rotating blades are arranged in auger-like manner, other features of the machine includes hopper, washing chamber, adjustable screen and centrifugal pump. The machine was designed with high consideration for safety, easy operation, efficiency and cost. The machine has the capacity to shred 50-75kg of PET bottles per hour. The recycling efficiency, shredding efficiency and percentage retention are the parameters used to evaluate the ...

This research was carried out to evaluate the coagulating effects of Moringa oleifera (Linnaeus) ... more This research was carried out to evaluate the coagulating effects of Moringa oleifera (Linnaeus) seed powder on wastewater at lower and higher concentration levels using Jar test. 10, 20, 30 and 40 ml of Moringa seed powder-prepared stock solution were used as lower concentration level, while 70, 80 and 90 ml were used as higher concentration level; and results compared. A control experiment was also set up . The pH, Temperature, Total Dissolved Solids, Conductivity and Total Suspended Solids were measured at 24 h post-treatment. Gas Chromatography–Mass Spectrometry was used to reveal chemical components in the ethanolic extract of M. oleifera seed powder. The optimum concentrations for Moringa coagulant at lower and higher concentration levels were 40 and 70 ml respectively. It was observed that 40 ml reduced the Total Suspended Solids of the wastewater from 1240 mg/l to 400 mg/l after 24 h settling interval with removal efficiency of 67.7%. Also, 70 ml reduced the Total Suspended ...

International Journal of Mathematical Sciences and Computing

Sustainable Water Resources Management

Wastewaters from four different sources were treated using locally developed plant, while treatme... more Wastewaters from four different sources were treated using locally developed plant, while treatment components included Azolla pinnata fern and palm kernel shell charcoal. The four wastewater sources were: domestic, municipal, aquaculture and industrial. Twenty-five parameters considered included: temperature, turbidity, electrical conductivity, pH, total suspended solid, total dissolved solids, total solid, acidity, total hardness, total nitrogen, total phosphorus, ammonical nitrogen, dissolved oxygen, biological oxygen demand and chemical oxygen demand. Metals analyzed also included; sodium, potassium, calcium, magnesium, zinc, iron, lead, copper, cadmium and manganese. From the results, considerable reduction in pollutant parameters were obtained in the four wastewaters after treatment. Complete (100%) removal efficiencies were obtained in cadmium and manganese in all the wastewaters except for aquaculture wastewater, while complete removal was obtained in lead and copper in aquaculture wastewater only. Similarly, turbidity, phosphorus and nitrogen recorded complete removal in all the wastewaters except for 75.7% removal of phosphorus in municipal wastewater. Other parameters reduced appreciably with statistically significant results at P < 0.05. This indicated high efficiency of the treatment plant, A. pinnata, in pollutants and metals’ removal, thereby making the treated four wastewaters good enough to be recycled for irrigation purposes.

International Journal of Phytoremediation

Abstract The competitive demand for water makes it a scarce resource for agricultural use. This n... more Abstract The competitive demand for water makes it a scarce resource for agricultural use. This necessitates wastewater reuse for irrigation and any other agricultural purpose, especially in developing countries where treatment of wastewaters is not a priority. The aim of this study was to evaluate the performance of a charcoal-based constructed wetland (CBCW) in treating aquaculture wastewater. Aquaculture wastewater from a Research Fishpond Farm was treated in a CBCW planted with Sacciolepsis africana and Commelina cyannae for 5 days retention time. Raw wastewater and the treated wastewater from the constructed wetland (CW) was sampled and the physicochemical parameters determined. The performance of the CW in treating aquaculture wastewater was conducted. The result showed that the CBCW was capable of removing 50% TSS, 88% COD, 93% BOD5, and 100% nitrate nitrogen. The pH and DO of the wastewater before treatment and after treatment ranged from 6.68 to 6.91 and 4.13 to 6.30 mg/l, respectively. Thus, CWs have great potential for the treatment of aquaculture wastewater and prevention of environmental degradation through wastewater treatment, thereby solving the problem of water scarcity for agriculture for optimum food production.

British Journal of Applied Science & Technology, 2016

A feasibility study was done on the combination of physical, biological and chemical treatment pr... more A feasibility study was done on the combination of physical, biological and chemical treatment processes using a wedge-wire screen, a two compartment septic tank and a multi-media anaerobic filtration tank with the addition of granulated activated carbon as an absorption media in the filtration tank. Experiments were conducted before and after treatment from four major abattoirs located in Akure, an urban city in South-Western Nigeria. Preliminary results indicated that the filtration tank has good potentials to substantially reduce odour, colour and pollution load of the slaughter-house effluents as a results of the activated carbon in it. Also, the septic tank was efficient in removing the sludge and reducing the pollution load. It also provided a good solid-liquid separation. The process removed up to 78% and 81% of the total COD and suspended solids respectively. The proposed process is an environmentally sound on-site facility and it is very easy to operate.

Advances in Research, 2015

European Journal of Social …, 2009

Journal of Civil, Construction and Environmental Engineering

International Journal of Clean Coal and Energy