Vol. 6, Issue 1, Part A (2024)

The objective of this work is to treat pharmaceutical wastewater by using inexpensive, environmentally benign ingredients as Natural coagulants. In this study, inexpensive coagulants, namely the powdered Neem leaves are used to treat the pharmaceutical wastewater. The leaves were harvested, sun-dried, and ground until they were the size of 300 and 150 micron sieve particles. Untreated Pharmaceutical wastewater was collected from industry. The chosen natural coagulant (namely Neem leaf powder), are individually added in different concentration of 1ml, 2ml, 3ml, 4ml, 5ml and 6ml in a 1000 ml wastewater taken in a beaker to find the optimum dosage using Jar test apparatus. The tests are carried out from the optimum dosage in different hydraulic retention time (2, 4, 6, 8hrs) by using natural coagulants. Conclusions are drawn based on the Chemical Oxygen Demand for the comparatives study of raw pharmaceutical wastewater by using natural coagulant in different sieve sizes for a COD Concentration. The maximum percentage of COD reduction was 85.90% at COD concentration with 150 µ under 8hrs HRT.