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  • Many Industries and government struggle with Algae in reservoir - and look for so many physical methods, if you want to know the best algae treatment method do comment below, will share the best kept secret
  • a. Selection of process The selection of specific unit processes depends on the nature of the sewage water , including degradability and treatability by selected processes plus the selection also depends on the discharge requirements . Other important factors for selecting any stp design are environmental impact , land availability , projected life of plant design and cost. All the relevant factors in process selection should be considered , although their relative importance will vary due to social , environmental , political differences as well as technological availability and expertise. b. Design of Biological reactor . The rate at which components of wastewater , such as organic matter are removed and the rate at which biomass is produced within a reactor are important criteria in the design and calculation of the size of biological reactors . c. Environmental Factors Affection growth. A number of environmental factors affect the activity of wastewater microbial populations and the rate of biochemical reaction. The factors include temperature , pH , Dissolved Oxygen , nutrient concentration and inhibition by toxic compounds. It is possible to control all these factors within a biological treatment system , except temperature .
  • After primary treatment the settled sewage water enters a specially designed reactor where it is mixed to a dense microbial population under aerobic conditions. Micro organisms , mainly bacteria convert soluble and colloidal organic matter into new cells . Now all that is required is to separate the dense microbial biomass from the purified wastewater . This is done by clarifier ( tube settler , lamella clarifier , upflow filter ) . The sludge from the clarifier is very different from the primary sludge , being composed mainly of biological cells rather than gross faecal solids . There are many different biological technologies available for sewage treatment including fixed film reactors , activated sludge systems , stabilization ponds eg . SAFF , FAB STP , Moving Bed Bioreactor MBBR based Sewage Treatment Plant , MBR , SBR Membrane Biological Reactor Sewage Treatment Plant
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