Vol. 9, Issue 10, Part C (2023)

Abstract
Wastewater treatment plays a pivotal role in environmental preservation and public health. Traditional chemical coagulants have been the go-to solution for flocculating and removing contaminants from wastewater. However, concerns about the environmental impact and the rising costs of synthetic chemicals have spurred interest in exploring natural coagulants as an eco-friendly and sustainable alternative. This research delves into the demystification of wastewater treatment using natural coagulants, shedding light on their mechanisms, efficacy, and practical applicability. By investigating a range of natural coagulants, such as plant extracts, biopolymers, and microbial agents, this study aims to provide insights into their coagulation performance, cost-effectiveness, and potential environmental benefits. Natural coagulant is a naturally occurred plants-based coagulant that can be used in coagulation-flocculation process of wastewater treatment for reducing turbidity. Based on the experimental results, it was concluded that natural coagulants which have been obtained from Dolichas lablab, Azadirachta indica, Moringa oleifera, Hibiscus rosa-sinensis have showed a merely equalant coagulation comparing to commercial alum. The turbidity removal efficiency for Dolichas lablab, Azadirachta indica, Moringa oleifera, Hibiscus rosa-sinensis respectively were 37.45%, 63.01%, 31.47%, 12.95% against 75.01% obtained from alum.