题目
题目
简答题

An ozone disinfection system uses a section of pipe as the disinfection contactor.  The concentration of ozone in the water is 0.09 mg/L, the velocity in the pipe is 0.11 m/s, the pipe length is 16 m. The pathogen inactivation rate constant, kp, for viruses at ToC is given by:   𝑘 𝑝 = 2.1744 × ( 1.0726 ) 𝑇 L mg . min Calculate the log inactivation credit for viruses at 25oC (to 2 deicmal places) using the Chick-Watson model: 𝑙 𝑜 𝑔 10 ( 𝑁 𝑜 𝑁 ) = 𝑘 𝑃 𝑐 𝑑 𝑡 where cd  is in units of mg/L and t is in standard units of time.  

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思路分析
To tackle this short-answer problem, I’ll go step by step and show how each piece of data feeds into the Chick-Watson log inactivation calculation. First, determine the residence time t in the disinfection contactor. With a pipe length L of 16 m and a flow velocity v of 0.11 m/s, the time water spends in the contactor is t = L / v = 16 / 0.11 ≈ 145.45 s. Converting to minutes (si......Login to view full explanation

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An ozone disinfection system uses a section of pipe as the disinfection contactor.  The concentration of ozone in the water is 0.09 mg/L, the velocity in the pipe is 0.11 m/s, the pipe length is 16 m. The pathogen inactivation rate constant, kp, for viruses at ToC is given by:  kp=2.1744×(1.0726)TLmg.min Calculate the log inactivation credit for viruses at 25oC (to 2 deicmal places) using the Chick-Watson model: log_{10}(\frac{ N_o} {N}) = k_P c_d t where cd  is in units of mg/L and t is in standard units of time.  

An ozone disinfection system uses a section of pipe as the disinfection contactor.  The concentration of ozone in the water is 0.09 mg/L, the velocity in the pipe is 0.11 m/s, the pipe length is 16 m. The pathogen inactivation rate constant, kp, for viruses at ToC is given by:   Calculate the log inactivation credit for viruses at 25oC (to 2 deicmal places) using the Chick-Watson model: where cd  is in units of mg/L and t is in standard units of time.  

An ozone disinfection system uses a section of pipe as the disinfection contactor.  The concentration of ozone in the water is 0.05 mg/L, the velocity in the pipe is 0.15 m/s, the pipe length is 11 m. The pathogen inactivation rate constant, kp, for viruses at ToC is given by:  kp=2.1744×(1.0726)T L mg.min Calculate the log inactivation credit for viruses at 25oC (to 2 deicmal places) using the Chick-Watson model: log10( No N )=kPcdt where cd  is in units of mg/L and t is in standard units of time.  

An ozone disinfection system uses a section of pipe as the disinfection contactor.  The concentration of ozone in the water is 0.05 mg/L, the velocity in the pipe is 0.15 m/s, the pipe length is 11 m. The pathogen inactivation rate constant, kp, for viruses at ToC is given by:   Calculate the log inactivation credit for viruses at 25oC (to 2 deicmal places) using the Chick-Watson model: where cd  is in units of mg/L and t is in standard units of time.  

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