Articles

  • TREATMENT OF POLLUTED RIVER WATER BY RZCS by AdministratorPosted on : 10 December 2010
    • Introduction
      Water is most essential for survival of life on earth. It is a key factor for the growth, development and progress of mankind. All the big rivers in India have history of the ancient civilization. The urbanization and industrialization in India could become possible because of the availability of water. From 1980 onward rapid growth has resulted the sequential changes from Grampanchayat to Nagarpanchayat and finally to Municipal Corporation. This rapid growth of urbanization is associated with rise in resources consumption and waste generation. Unfortunately from all Nagarpanchayat, Nagarparishad, Nagarpalika and many of the Municipal Corporations in Maharashtra state the untreated sewage is being disposed off in to nearby water body. The treated and untreated sewage and industrial effluent join the river when it flows through the city. During the summer, it mostly carries the waste water. This is the fate of almost all the rivers that passes through the cities. No doubt each river has its self-purification capacity. Various biotic and abiotic factors like flow, turbulence, sedimentation and microbial activities etc. work together in self-purification. However sewage generated from the large population and the industrial waste joining the river, over load the self-purification capacity. Thus the river water remains polluted for long stretch of the river flow.
      Pune is best known as city of education and intellectuals. However 100% of sewage is not treated before deposal in to the river. Pune is situated on the western margin of the Deccan Plateau at the confluence of Mutha and Mula River. Mutha and Mula River originate in the Western Ghats. Both rivers flow through the heart of city and after confluence it travels to villages at downstream to join river Bhima. River Bhima is a part of Ujani basin.
      Citizen of Pune gets uncontaminated water from Khadakwasla dam on river Mutha. However the people residing in the villages at the downstream are compelled to get the river water which is polluted by citizens of Pune. The river quality is so contaminated that conventional treatment units like aeration, coagulation, sedimentation, filtration and chlorination cannot give the potable grade water. The condition worsens when the discharges from industrial & human settlement join the river in downstream of Pune. It is observed that the villagers from Manjari, Theur, Naigaon, Koregaon Mul are forced to switch over from river water to underground water sources. Waterborne diseases like cholera, jaundice are common in these villages.  Even the water is not fit for agriculture usage. The underground water has high solid & its availability is not assured during summer. Presently, water from underground sources is pumped, chlorinated stored and supplied. The system is energy dependent and needs maintenance. It is observed that wells located near bank of river have to be abandoned due to contaminated water.