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Assessment of environmental impact on air quality by cement industry and mitigating measures: a case study
1Chemical Engineering Programme, Abubakar Tafawa Balewa University, P. M. B. 0248, Bauchi, Nigeria. kbgarba_chep@yahoo.com
Abstract:
In this study, environmental impact on air quality was evaluated for a typical Cement Industry in Nigeria. The air pollutants in the atmosphere around the cement plant and neighbouring settlements were determined using appropriate sampling techniques. Atmospheric dust and CO2 were prevalent pollutants during the sampling period; their concentrations were recorded to be in the range of 249-3,745 mg/m3 and 2,440-2,600 mg/m3, respectively. Besides atmospheric dust and CO2, the air pollutants such as NOx, SOx and CO were in trace concentrations, below the safe limits approved by FEPA that are 0.0062-0.093 mg/m3 NOx, 0.026 mg/m3 SOx and 114.3 mg/m3 CO, respectively. Some cost-effective mitigating measures were recommended that include the utilisation of readily available and low-cost pozzolans material to produce blended cement, not only could energy efficiency be improved, but carbon dioxide emission could also be minimised during clinker production; and the installation of an advance high-pressure grinding rolls (clinker-roller-press process) to maximise energy efficiency to above what is obtainable from the traditional ball mills and to minimise CO2 emission from the power plant.
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Design Example: Sustainability in Concrete Building
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground cistern.
