Abstract:
Pakistan has now essentially exhausted its available water-resources and is on the verge of becoming a water-deficit country. The per-capita water availability has dropped from 5,600 m to 1,000 m. The public water-requirement has risen manifolds, as population is increasing, industry is growing and we are bringing more area under cultivation to meet the increasing demand for agriculture-products. The quality of groundwater and surface-water is low and is further deteriorating because of unchecked disposal of untreated municipal and industrial wastewater and excessive use of fertilizers and insecticides.
Sedimentation tanks are used to improve the quality of point and non-point sources of water pollution which includes domestic wastewater. Sedimentation tank can be used as primary treatment for wastewater and for are used as one component in a sequential treatment. The most common application of the sedimentation tank is the primary treatment of domestic sewage effluent. Wastewater is further treated in secondary stage for further removal of impurities. As the treated wastewater satisfactorily meets the Pakistan National Environmental Quality Standards (NEQS), thus it can be used for horticulture & replenishing underlying groundwater aquifer. The solid waste collected from the Sedimentation Tank after drying up can be used as fertilizer for trees & plants, thus converting the whole project into “Zero Waste”. This project presents an overview of low-cost treatment option for the treatment of waste water of MCE with sedimentation tank.
