IJEP 41(8): 893-899 : Vol. 41 Issue. 8 (August 2021)
1. Sathyabama Institute of Science and Technology, Chennai – 600 119, India
2. Chennai Institute of Technology, Chennai, India
The disposal of wastewater is one of the most serious problems in the industrial era of the urbanizing world. It affects the quality of land, water and also its surrounding environment significantly. The present study focused on the cost-effective biological treatment of dairy effluent by using aquatic plant (water hyacinth). The major objective of our study is to investigate the filtration potential of water hyacinth (an aquatic plant) in treating wastewater, that is discharged from the small-scale dairy industries. The water quality parameters, such as pH, electrical conductivity (EC), total hardness (TH), alkalinity, total dissolved solids (TDS), chemical oxygen demand (COD), calcium (Ca), magnesium (Mg), sulphate, potassium, sodium and chloride, were tested for the detention period of 15 days and 30 days with varying plant growth density. The results were analyzed and compared with the irrigation standards to evaluate the treatment efficiency. The analysis results show greater efficiency in removal of TH, Ca, Mg, EC and COD as 80, 85, 64, 63 and 73%, respectively and moderate efficiency in removal of Na, K and SO4 as 43, 57 and 59%, respectively. Thus, the present biological treatment system will provide outlet water of upgraded quality by considering the efficient removal of COD, TH, Na, K and SO4 that can be discharged directly into the public drains and watercourses without affecting the assimilating capacity of streams. The present study can be continued to analyze the various aquatic plants in order to construct artificial wetland based treatment facilities for uptaking the pollutants from wastewater that can be used for secondary uses, such as gardening and landscaping purposes.
Water hyacinth, Aquatic plants, Adsorption, Industrial wastewater, Biological treatment
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