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Abstract

Use of solar powered aerator for improving performance of conventional Sewerage Treatment Plant based on waste stabilization pond technique

Author(s): Mohit Verma, Ajoy Sharma

In treatment of waste water (domestic sewage) waster stabilization pond is very old and conventional technology. This technology is based on primary and secondary treatment using natural process of anaerobic and aerobic nature which helps to reduce organic load of waste water and helps in overall cleaning of waste water using minimum external resources. Traditionally a sewerage treatment plant based on waste stabilization pond technique consist anaerobic tank with approx one day retention time, facultative pond with approx 10 days retention time and maturation pond with 10 days retention time. Conventionally the total achievement of results in waster stabilization pond in terms of production of BOD are 90 to 95% with the help of this system BOD near to 30mg / L are achieved but for further reduction of BOD beyond 30 mg/L tertiary treatment is required which consumes a lot of land. So in this study, the aeration of waste water is improved with the help of paddler type aerator powered with the help of solar power. The results are analyzed in departmental laboratory for various parameters like pH, TSS, BOD, COD and fecal coliform for evaluation of performance of aerator. A correlation in the quantity of sewerage treated with amount of oxygen supplied is tried to establish so optimum number of aerators for desired level of results can be established along with benefits of using solar technology for aeration depicting invest cost with electrical expenditure of normal aerator is tried to find for the purpose of finding financial sustainability of the research.


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