题目
题目

ENGR10004_2025_SM1 Homework Assessment 6 - Water Treatment Quiz

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:  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.  

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思路分析
First, determine the residence time t in the disinfection contactor from the pipe length and flow velocity. Using t = L / v, with L = 16 m and v = 0.11 m/s, we get t = 16 / 0.11 ≈ 145.45 s, which is 2.424 minutes (since 145.45 s ÷ 60 ≈ 2.424). Next, compu......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:   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.  

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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