2. Methodology
2.1. Sources of effluent, sample collection and analysis Two rubber factories/sites (Factories A and B) were chosen for this study. The factories were situated along the Ikpoba River whichruns across the Eastern end of Benin City, South-South, Nigeria. Theentire experiment (baseline wastewater quality monitoring, treatment in the macrophyte pond, and utilization of resulting effluent for growing maize plants) began in November 2003 and endedin March, 2006. The efficiency of water lettuce based macrophyte pond to treat wastewater from rubber processing industries was monitored for three months for each inoculation by varying there tention time. In order to obtain reliable physicochemical and biological parameters of wastewater from the factories prior to to treatment in the macrophyte pond, baseline wastewater quality monitoring was performed for one year, starting from November01, 2003 to November 01, 2004.
2.2. Establishment of water lettuce based pond systemsA batch system of storage ponds was established to comparewith a real field macrophyte pond. The ponds were established in plastic pots in the Screen House at the Department of Crop Science, University of Benin, Nigeria. Wastewater quality monitoringwas carried out on these pots in order to determine the effectivesof a water lettuce based pond for treatment of rubber processing wastewater
2. Methodology
2.1. Sources of effluent, sample collection and analysis Two rubber factories/sites (Factories A and B) were chosen for this study. The factories were situated along the Ikpoba River whichruns across the Eastern end of Benin City, South-South, Nigeria. Theentire experiment (baseline wastewater quality monitoring, treatment in the macrophyte pond, and utilization of resulting effluent for growing maize plants) began in November 2003 and endedin March, 2006. The efficiency of water lettuce based macrophyte pond to treat wastewater from rubber processing industries was monitored for three months for each inoculation by varying there tention time. In order to obtain reliable physicochemical and biological parameters of wastewater from the factories prior to to treatment in the macrophyte pond, baseline wastewater quality monitoring was performed for one year, starting from November01, 2003 to November 01, 2004.
2.2. Establishment of water lettuce based pond systemsA batch system of storage ponds was established to comparewith a real field macrophyte pond. The ponds were established in plastic pots in the Screen House at the Department of Crop Science, University of Benin, Nigeria. Wastewater quality monitoringwas carried out on these pots in order to determine the effectivesof a water lettuce based pond for treatment of rubber processing wastewater
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