Requirement of fresh water is increasing gradually due to its excessive use in domestic, industrial and agricultural purposes. .The used water from above mentioned sector becomes polluted. Owing to this excessive use, we have to face water shortage problems . The waste are produced by industries, human and animals but there is no proper way to deposit them, so they also contribute to pollute the drinkable water. This polluted water is not only one of the prime global challenges for various ailments and casualties, but it is also contributing to the incessant shortage of the available freshwater worldwide . Purification of this polluted water has become very necessary ) and exists as a major problem in many under developed parts of the world . This polluted water contain many heavy metals in it, namely; Arsenic(As), Cadmium (Cd), Nickel (Ni), Mercury (Hg), Chromium (Cr), Zinc (Zn), and Lead (Pb) and has become a serious health issue for men of 21 st century .es . The mechanism in toxicity induced by heavy metal is found to be the generation of highly reactive oxygen species that cause oxidative damage that leads to above mentioned disorders. Their non-biodegradable nature makes them more difficult to deal for purification of water . This polluted water seeps down and affect the fresh ground water, and presence of these heavy metals results in damage of aquatic life . Official data tells that about 4.36 billion m 3 (BCM) wastewater is produced annually, which consist of 1.30 BCM industrial wastewater and 3.06 BCM domestic water ( National Agricultural Research Centre ).A huge fraction of this waste water is being used untreated in irrigation in Pakistan . There is quite essential need to treat wastewater to alleviate the pollutant content, before we dispose it the agricultural lands or natural ecosystem. Wastewater is being treated through a variety of methods using biological, physical, chemical and thermal means, involving stages like primary, secondary and tertiary treatments .