Physicochemical Characteristics of Soil from Selected Solid Waste Dump Sites in Port Harcourt, Rivers State, Nigeria

This paper evaluates the thermo-economics of a retrofit small scale municipal solid waste (MSW)-fueled power plant in Port Harcourt, Rivers State, Nigeria. The design parameters for the combustion chamber which utilizes mass combustion in stoker crate furnace is operated at steam saturation pressure of 38.2bar, with fuel consumption rate of 41.3tonnes/hr (11.88kg/s) and was selected for the amount of MSW generated in Port Harcourt metropolis. The data used to assess the availability of the fuel (MSW) were obtained from waste dumpsites controlled by Rivers State Waste Management Agency (RIWAMA). MATLAB Software modeling was used for the thermodynamic analysis to appropriately retrofit a steam turbine to the selected combustor and the result show that the optimal performance of the proposed MSW plant gives a net power output of 5.23MW. The result further shows that heat in the steam entering the turbine is equivalent to 0.71MWh per tonnes of waste. Therefore, at 17.3% thermal efficiency of the proposed MSW plant, 0.13 MWh of electricity will be produced per tonnes of waste combusted. However, it is estimated that the plant may consume 15% of the electricity, which implies that 0.11MWh/tonne will be exported to the grid. Thus, as the plant is expected to process 340770.3tonnes/yr of MSW, the net electricity output of the proposed plant is estimated at 37.48GWh per year. The economic evaluations have shown that the Net present worth of the plant is $6395107.07 with a payback period of 7years for a 20years life cycle. This work thus indicates huge potentials in generating electrical energy and wealth from MSW in Port Harcourt and beyond with the use of cheap and readily available fuel from municipal solid waste.

Download Full-text

Garden City or Garbage City: The Case of Port Harcourt Metropolis, Rivers State, Nigeria

Asian Journal of Advanced Research and Reports ◽

10.9734/ajarr/2019/v3i330091 ◽

2019 ◽

pp. 1-11

Author(s):

Tombari Bodo

Keyword(s):

Waste Management ◽

Solid Waste ◽

Solid Waste Management ◽

Management Strategies ◽

Sampling Technique ◽

Garden City ◽

Port Harcourt ◽

The Government ◽

Rivers State ◽

The City

Port Harcourt acquired the name “Garden City” for its neatness, beauty, organisation of the buildings and well constructed road networks across the entire city; but this once beautiful city has been overtaken by garbage. Hence, the objectives of this study were to find out why the solid waste management strategies employed by the Rivers State Waste Management Agency and their contractors are not working and provide best solutions in curbing the challenges militating against solid waste management of the city. Purposive sampling technique was used to determine the sample. Because of the time constraint and the wide area of coverage for this study; 10 areas consisting of 10 communities were selected based on their size, popularity and centrality. Oral interviews and field observation were the methods of data collection and the data obtained through oral interviews were analysed through simple coding, groupings, re-writing, transcribing and interpretations. The results revealed that the solid wastes generated are uncontrolled due to overcrowded settlements; an uncultured way of living of the residents; lack of the needed man-power and technology on the part of the solid waste contractors. It was also revealed that the Government do not carry out proper monitoring and uses unskilled and unqualified persons to carry out their jobs. It was concluded that to adequately clean up the city of Port Harcourt, the Government should stand up to their responsibility of keeping the city clean and sensitize the people on the need to package and dispose of their waste properly.

Download Full-text

Assessment of Solid Waste Management Practice in Port Harcourt Metropolis, Rivers State, Nigeria

Journal of Geography Environment and Earth Science International ◽

10.9734/jgeesi/2018/42325 ◽

2018 ◽

Vol 16 (2) ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

H Stanley ◽

A Owhor

Keyword(s):

Waste Management ◽

Solid Waste ◽

Solid Waste Management ◽

Management Practice ◽

Port Harcourt ◽

Rivers State ◽

Waste Management Practice

Download Full-text

Soil quality assessment and phytoaccumulation potentials of selected edible vegetables around Ntigha solid waste dump, Abia State, Nigeria

Journal of Scientific Agriculture ◽

10.25081/jsa.2018.v2.905 ◽

2018 ◽

Vol 2 ◽

pp. 14

Author(s):

U. Kelechi Osuocha ◽

C. Ezinne Chukwu ◽

S. Ahamefula Ezekwe

Keyword(s):

Heavy Metals ◽

Solid Waste ◽

Enzyme Activities ◽

Physicochemical Characteristics ◽

Soil Samples ◽

Open Pit ◽

Waste Dump ◽

Soil Heavy Metals ◽

Human Food Chain ◽

The Impact

The present study evaluated the impact of open solid waste dumping on soil physicochemical characteristics, enzyme activities, soil heavy metals and bioavailability of these metals in selected edible vegetables. Twenty-six soil samples were collected from 13 different points. The considered points were center of the dumpsite (DC), 4 meters away east (E1), west (W1), north (N1), and south (S1) from the center of the dumpsite; and 8 meters away east (E2), west (W2), north (N2) and south (S2) from the center of the dumpsite. The controls were taken 100 meters away from the dumpsite center east (E3), west (W3), north (N3), and south (S3). Soil samples were collected at the depth of 0-45cm and 46-90cm at each point. Results obtained showed the physicochemical and enzyme activities of the center of the dumpsite (DC) were affected when compared to other points considered in this study. Significant differences between soil depths were also observed. Soil heavy metals also showed significant increase in dumpsite compared to control soils (P<0.05). Phytoavailability of the heavy metals studied showed that vegetables grown around Ntigha dumpsite accumulated significant level of the metals compared to their control counterparts (P<0.05). This study has revealed that open pit disposal of solid waste increased the phytoaccumulation potentials of edible vegetables grown around the dumpsite. Hence proper waste disposal method is advocated so as to prevent bioaccumulation of these heavy metals in human food chain.

Download Full-text

Some Physicochemical Parameters of Wastewater from an Oil Industry at Point of Discharge in Port Harcourt, Rivers State, Nigeria

Journal of Physical Science and Environmental Studies ◽

10.36630/jpses_20004 ◽

2020 ◽

Vol 6 (2) ◽

pp. 23-28

Author(s):

O. A. F Wokoma ◽

◽

O. S Edori ◽

Keyword(s):

Physicochemical Parameters ◽

Oxygen Demand ◽

Aquatic Organisms ◽

Oil Industry ◽

World Health ◽

Port Harcourt ◽

Water Association ◽

Wastewater Samples ◽

Health Organization ◽

Rivers State

Wastewater samples were collected from an oil industry at the point of discharge for a period of two years, from January 2018 – December 2019. The wastewater samples were analyzed for different physicochemical parameters such as temperature, turbidity, total dissolved solids (TDS), total suspended solids (TSS), conductivity, pH, alkalinity, salinity, total hydrocarbon content (THC), biochemical oxygen demand (BOD) and chemical oxygen demand (COD) to examine their conformity to fulfill requirements as recommended by World Health Organization (WHO), Federal Ministry of Environment (FME) and Drinking Water Association (DWA). The results indicated that all the parameters in the discharged wastewater were within acceptable limits of the regulatory bodies. The field data showed that the investigated firm conformed to the law by carrying out proper procedures before discharging the effluents into the public drain and river. Therefore, the release of wastewater from the industry doesn't constitute a danger to the environment as well as aquatic organisms. Keywords: Physicochemical parameter, wastewater discharge, oil industry, environment, contaminants

Download Full-text