There is a variety of natural coagulants used around the world, depending on the availability. Extracts from the seeds of Moringa Oleifera can be used, the trees of which are widely present in Africa, the Middle East and the Indian subcontinent. Strychnos potatorum, also known as clearing nuts or the nirmalitree, is found in India to treat water. Prickly pear cactus is prevalent and traditionally used in Latin America. There are also reports of other natural coagulants being used, such as fava beans.
What are the natural coagulants locally available in your country? Besides its effectiveness in reducing turbidity, how effective are they against microorganisms? How do you prepare the coagulant? And what is the common dosage?