Saran's Learn Microbiology

COURSE DETAILS Name of the Course               :               Microscopy – An Overview (Phase II) Duration                                     :               7 Days Starting Date                             :               24.05.2023 End Date                               ...

LARGE SCALE SEWAGE TREATMENT Sewage treatment on a large scale of populations of city is known as Large Scale Sewage Treatment. In Cities, Sewage and Garbage are generated in massive amount per day which is treated by Large Scale Sewage Treatment plants regularly. The principal objective of Wastewater treatment is generally to allow Human and Industrial effluents to be disposed of without danger to human health or unacceptable damage to the natural environment. Overall processes of conventional Large Scale Sewage Treatment plant can be divided into three steps: 1)     Primary treatment (Physical method) - Physical separation of Insoluble materials to lower Biological Oxygen Demand (BOD) 2)    Secondary treatment (Biological method) - Microbial decomposition of Organic materials in the Effluents. 3)    Tertiary treatment (Chemical method) - Chemical removal of inorganic nutrients and pathogenic microbes. 4)     Sludge Treatment (A...

METHODS FOR SMALL SCALE SEWAGE TREATMENT   1) CESSPOOLS OR CESSPIT In many homes, human waste is emptied into underground Cesspools. Cesspool is an underground construction consisting of Concrete cylindrical rings with pores in the walls of the ring. Cesspool Sewage water passes into the Soil through the bottom and pores of the Cesspool, while Solid waste accumulates on the bottom. Microorganisms, especially Anaerobic bacterial species, digest the Solid matter into Soluble products that enter the soil and enrich it. The amount of breakdown products exceeds, it forms Thick layers which need to be cleaned by using Strong acids. Dried bacterial preparation of Bacillus subtilis or Yeast cells or Enzymes should be added at intervals. These accelerate the decomposition of sludge deposited at the bottom of cesspool. The minimum size Cesspool for a habitable dwelling is 18000 litres and on average this Cesspool tank will require emptying once completely filled or every 20 - 25 days...