Scientists detected COVID-19 in Boston’s sewer system. The city
decides to disinfect the effluent of its...
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Civil Engineering
Scientists detected COVID-19 in Boston’s sewer system. The citydecides to disinfect the effluent of its wastewater treatmentplant. Please describe the procedures and the required chemicalagents to measure chlorine concentration in water.
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Disinfection is usually the tertiarytreatment applied to waste water for microbial treatment after theinitial processes of physical chemical and biological treatmentsDisinfection has to meet two objectivesPrimary DIsinfection to kill anypathogens in waterSecondary or Residual Disinfectionto prevent pathogen regrowth in the water during the period beforeit is usedDifferent chemical agents can beused for both the stages but the most commonly used method ofdisinfection is chlorination or free chlorine disinfection becauseit is cheap reliable and easy to useFree chlorine in water is developedby dosing with either chlorine gas Cl2g sodium hypochloriteNaOCl
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