Revitalizing Parboiled Rice Mill Wastewater through Algal Treatment: Towards Biodiesel Production and Environmental Health

IJEP 44(5): 412-417 : Vol. 44 Issue. 5 (May 2024)

K.S. Jinesh Babu*, B. Praburajan, J.M. Kiruphanithi, D.T. Surya Bharathi and J. Umar Farooq

Mepco Schlenk Engineering College, Department of Civil Engineering, Sivakasi – 626 005, Tamil Nadu, India


Parboiled rice mill wastewater (PRMW), a nutrient rich wastewater released from rice mills, leads to eutrophication in receiving waterbodies. The study presented in this paper made use of freshwater green algae, Chlorella vulgaris, to treat this wastewater. From the study, it was found that there is a significant reduction in nutrients, nitrate and phosphate, which are primarily responsible for eutrophication. Also, the algal treatment brought down the chemical oxygen demand (COD) level to a great extent. Besides the treatment, the grown-up lipid enriched algal biomass was used for biodiesel extraction. Lipid was extracted by Soxhlet apparatus, which is followed by distillation and extraction of biodiesel by transesterification process.


Algal treatment, Biodiesel, Chlorella vulgaris, Lipid, Parboiled rice mill wastewater


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