Green Education

  Sources Of waste water Broadly, the wastewater sources are categorize into agricultural, domestic and industrial sector. There is another sector which few people considered is actually the storm water which is the just rainwater which is coming and falling on the surface and generatingrunoff. So, urban runoff or storm water that matters so that is also a type of or a source of wastewater which can be considered. Although normally storm water, there are two opinions of considering storm water as a wastewater or not because it is rain water directly. So, it is not been used or it is not that way have been utilized for any purpose, but when it falls on the surface it acquires some pollutants and the characteristic of water is not usable without adequate treatment for many purpose, ok. ·          What are the characteristics of wastewater? Wastewater physical parameters Color : Fresh wastewater is normally brown and yellowish, ...

  Conventional Activated sludge process ·          Conventional biological treatment of wastewater under aerobic conditions includes activated sludge process (ASP) and Trickling Filter. The ASP was developed in England in 1914. The activated sludge process consists of an aeration tank, where organic matter is stabilized by the action of bacteria under aeration and a secondary sedimentation tank (SST), where the biological cell mass is separated from the effluent of aeration tank and the settle sludge is recycled partly to the aeration tank and remaining is wasted (Figure 19.1). Recycling is necessary for activated sludge process. ·          The aeration conditions are achieved by the use of diffused or mechanical   aeration.   Loading Rate: The organic matter loading rate applied to the reactor is quantified as kg of BOD applied per unit volume of the reactor per day, called as vol...