A RESEARCH ON INVESTIGATION OF EFFECT OF NATURAL COAGULANT (STEM OF TULSI) FOR REDUCTION OF PH, TURBIDITY AND COD FROM SEWAGE WATER: LOW COST WATER PURIFICATION. International Development Planning Review, [S. l.], v. 23, n. 1, p. 753–756, 2024. Disponível em: https://idpr.org.uk/index.php/idpr/article/view/201.. Acesso em: 12 oct. 2026.